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package javax.faces.component;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.ValueExpression;
import javax.faces.FacesException;
import javax.faces.FacesWrapper;
import javax.faces.application.Resource;
import javax.faces.component.visit.VisitCallback;
import javax.faces.component.visit.VisitContext;
import javax.faces.component.visit.VisitHint;
import javax.faces.component.visit.VisitResult;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.PostRestoreStateEvent;
import javax.faces.event.ComponentSystemEvent;
import javax.faces.event.ComponentSystemEventListener;
import javax.faces.event.FacesEvent;
import javax.faces.event.SystemEvent;
import javax.faces.event.SystemEventListener;
import javax.faces.event.FacesListener;
import javax.faces.event.SystemEventListenerHolder;
import javax.faces.render.Renderer;
/**
* <p><strong class="changed_modified_2_0
* changed_modified_2_0_rev_a changed_modified_2_1 changed_modified_2_2">UIComponent</strong> is
* the base class for all user interface components in JavaServer Faces.
* The set of {@link UIComponent} instances associated with a particular request
* and response are organized into a component tree under a {@link
* UIViewRoot} that represents the entire content of the request or
* response.</p>
*
* <p>For the convenience of component developers,
* {@link UIComponentBase} provides the default
* behavior that is specified for a {@link UIComponent}, and is the base class
* for all of the concrete {@link UIComponent} "base" implementations.
* Component writers are encouraged to subclass
* {@link UIComponentBase}, instead of directly
* implementing this abstract class, to reduce the impact of any future changes
* to the method signatures.</p>
*
* <p class="changed_added_2_0">If the {@link
* javax.faces.event.ListenerFor} annotation is attached to the class
* definition of a <code>Component</code>, that class must also
* implement {@link javax.faces.event.ComponentSystemEventListener}.
* </p>
*/
public abstract class UIComponent implements PartialStateHolder, TransientStateHolder, SystemEventListenerHolder,
ComponentSystemEventListener {
private static Logger LOGGER = Logger.getLogger("javax.faces.component",
"javax.faces.LogStrings");
/**
* <p class="changed_added_2_1">The <code>ServletContext</code> init
* parameter consulted by
* the <code>UIComponent</code> to tell whether or not the
* {@link #CURRENT_COMPONENT} and {@link #CURRENT_COMPOSITE_COMPONENT}
* attribute keys should be honored as specified.</p>
*
* <p>If this parameter is not specified, or is set to false, the contract
* specified by the {@link #CURRENT_COMPONENT} and
* {@link #CURRENT_COMPOSITE_COMPONENT} method is not honored. If this
* parameter is set to true, the contract is honored.</p>
*/
public static final String HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME =
"javax.faces.HONOR_CURRENT_COMPONENT_ATTRIBUTES";
/**
* <p class="changed_added_2_0"><span
* class="changed_deleted_2_2">The</span> key to which the
* <code>UIComponent</code> currently being processed will be
* associated with within the {@link FacesContext} attributes
* map. <span class="changed_deleted_2_2">The use of this constant is
* deprecated. Please see {@link
* #HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME} to enable its
* use.</span></p>
*
* @see javax.faces.context.FacesContext#getAttributes()
*
* @since 2.0
*
* @deprecated
*/
public static final String CURRENT_COMPONENT = "javax.faces.component.CURRENT_COMPONENT";
/**
* <p class="changed_added_2_0"><span
* class="changed_deleted_2_2">The</span> key to which the
* <em>composite</em> <code>UIComponent</code> currently being
* processed will be associated with within the {@link FacesContext}
* attributes map. <span class="changed_deleted_2_2">The use of this
* constant is deprecated. Please see {@link
* #HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME} to enable its
* use.</span></p>
*
* @see javax.faces.context.FacesContext#getAttributes()
*
* @since 2.0
*
* @deprecated
*/
public static final String CURRENT_COMPOSITE_COMPONENT = "javax.faces.component.CURRENT_COMPOSITE_COMPONENT";
/**
* <p class="changed_added_2_0">The value of this constant is used as the key in the
* component attribute map, the value for which is a
* <code>java.beans.BeanInfo</code> implementation describing the composite
* component. This <code>BeanInfo</code> is known as the
* <em>composite component BeanInfo</em>.</p>
*
* @since 2.0
*/
public static final String BEANINFO_KEY = "javax.faces.component.BEANINFO_KEY";
/**
* <p class="changed_added_2_0">The value of this constant is used as the key
* in the <em>composite component BeanDescriptor</em> for the
* <code>Map<PropertyDescriptor></code> that contains meta-information
* for the declared facets for this composite component.
* This map must contain an entry under the key {@link #COMPOSITE_FACET_NAME}, even
* if no facets were explicitly declared. See {@link #COMPOSITE_FACET_NAME}.</p>
*
* @since 2.0
*/
public static final String FACETS_KEY = "javax.faces.component.FACETS_KEY";
/**
* <p class="changed_added_2_0">The value of this constant is used as the key
* in the component attributes <code>Map</code> for the
* {@link javax.faces.view.Location} in the view at which this component
* instance resides.</p>
*
* @since 2.0
*/
public static final String VIEW_LOCATION_KEY = "javax.faces.component.VIEW_LOCATION_KEY";
/**
* <p class="changed_added_2_0">The value of this constant is used as the key
* in the <em>composite component BeanDescriptor</em> for a
* <code>ValueExpression</code> that evaluates to the
* <code>component-type</code> of the <em>composite component root</em>
* <code>UIComponent</code> for this composite component, if
* one was declared by the composite component author.</p>
*
* @since 2.0
*/
public static final String COMPOSITE_COMPONENT_TYPE_KEY = "javax.faces.component.COMPOSITE_COMPONENT_TYPE";
/**
* <p class="changed_added_2_0">The value of this constant is used as the key
* in the <code>Map</code> returned as described in {@link #FACETS_KEY}
* for the
* <code>PropertyDescriptor</code> describing the composite component facet.
* The value of this constant is also used as the key in the <code>Map</code>
* returned from {@link #getFacets}. In this case, it refers to the actual
* facet that is the {@link javax.faces.component.UIPanel} that is the parent of the all
* of the components in the <code><composite:implementation></code>
* section of the <em>composite component VDL file</em>.</p>
*
* @since 2.0
*/
public static final String COMPOSITE_FACET_NAME = "javax.faces.component.COMPOSITE_FACET_NAME";
/**
* <p class="changed_added_2_1">This constant enables one to quickly discover
* the names of the declared composite component attributes that have been
* given default values by the composite component author. The information
* is exposed as a <code>Collection<String></code> returned from the
* <code>getValue()</code> method on the <em>composite component
* BeanDescriptor</em>, when this constant is passed as the argument.</p>
*
* @since 2.1
*/
public static final String ATTRS_WITH_DECLARED_DEFAULT_VALUES =
"javax.faces.component.ATTR_NAMES_WITH_DEFAULT_VALUES";
enum PropertyKeysPrivate {
attributesThatAreSet
}
/**
* Properties that are tracked by state saving.
*/
enum PropertyKeys {
rendered,
attributes,
bindings,
rendererType,
systemEventListeners,
behaviors,
passThroughAttributes
}
/**
* List of attributes that have been set on the component (this
* may be from setValueExpression, the attributes map, or setters
* from the concrete HTML components. This allows
* for faster rendering of attributes as this list is authoritative
* on what has been set.
*/
List<String> attributesThatAreSet;
ComponentStateHelper stateHelper = null;
UIComponent compositeParent;
private transient Boolean isSetCurrentComponent;
// -------------------------------------------------------------- Attributes
/**
* <p>Return a mutable
* <code>Map</code> representing the attributes
* (and properties, see below) associated wth this {@link UIComponent},
* keyed by attribute name (which must be a String). The returned
* implementation must support all of the standard and optional
* <code>Map</code> methods, plus support the following additional
* requirements:</p>
* <ul>
* <li>The <code>Map</code> implementation must implement
* the <code>java.io.Serializable</code> interface.</li>
* <li>Any attempt to add a <code>null</code> key or value must
* throw a <code>NullPointerException</code>.</li>
* <li>Any attempt to add a key that is not a String must throw
* a <code>ClassCastException</code>.</li>
* <li>If the attribute name specified as a key matches a property
* of this {@link UIComponent}'s implementation class, the following
* methods will have special behavior:
* <ul>
* <li><code>containsKey</code> - Return <code>false</code>.</li>
* <li><code>get()</code> - If the property is readable, call
* the getter method and return the returned value (wrapping
* primitive values in their corresponding wrapper classes);
* otherwise throw <code>IllegalArgumentException</code>.</li>
* <li><code>put()</code> - If the property is writeable, call
* the setter method to set the corresponding value (unwrapping
* primitive values in their corresponding wrapper classes).
* If the property is not writeable, or an attempt is made to
* set a property of primitive type to <code>null</code>,
* throw <code>IllegalArgumentException</code>.</li>
* <li><code>remove</code> - Throw
* <code>IllegalArgumentException</code>.</li>
* </ul></li>
* </ul>
*
*/
public abstract Map<String, Object> getAttributes();
/**
* <p class="changed_added_2_2">This is a convenience method that
* simply calls {@link #getPassThroughAttributes(boolean)}, passing {@code true}
* as the argument. This method must never return {@code null}.</p>
*
* @since 2.2
*/
public final Map<String, Object> getPassThroughAttributes(){
return getPassThroughAttributes(true);
}
/**
* <p class="changed_added_2_2">This method has the same specification as
* {@link #getPassThroughAttributes() } except that it is allowed to return
* {@code null} if and only if the argument {@code create} is {@code false}
* and no pass through attribute data structure exists for this instance.
* The returned {@code Map} implementation must support all of the standard and optional
* {@code Map} methods, plus support the following additional requirements.
* The map must be stored in using {@link #getStateHelper}.</p>
*
* <div class="changed_added_2_2">
*
* <p>The {@code Map} implementation must implement {@code java.io.Serializable}.</p>
*
* <p>Any attempt to add a {@code null} key or value must throw a {@code NullPointerException}.</p>
*
* <p>Any attempt to add a key that is not a {@code String} must
* throw an {@code IllegalArgumentException}.</p>
*
* <p>For backward compatibility with components that extend directly from
* this class, a default implementation is provided that returns the empty
* map.</p>
*
* </div>
*
* @param create if <code>true</code>, a new {@code Map}
* instance will be created if it does not exist already. If
* <code>false</code>, and there is no existing
* <code>Map</code> instance, one will not be created and
* <code>null</code> will be returned.
* @return A {@code Map} instance, or {@code null}.
*
* @since 2.2
*/
public Map<String, Object> getPassThroughAttributes(boolean create) {
return Collections.emptyMap();
}
// ---------------------------------------------------------------- Bindings
/**
*
* <p>Call through to {@link #getValueExpression} and examine the
* result. If the result is an instance of the wrapper class
* mandated in {@link #setValueBinding}, extract the
* <code>ValueBinding</code> instance and return it. Otherwise,
* wrap the result in an implementation of
* <code>ValueBinding</code>, and return it.</p>
*
* @param name Name of the attribute or property for which to retrieve a
* {@link ValueBinding}
*
* @throws NullPointerException if <code>name</code>
* is <code>null</code>
*
* @deprecated This has been replaced by {@link #getValueExpression}.
*/
public abstract ValueBinding getValueBinding(String name);
/**
* <p>Wrap the argument <code>binding</code> in an implementation of
* {@link ValueExpression} and call through to {@link
* #setValueExpression}.</p>
*
* @param name Name of the attribute or property for which to set a
* {@link ValueBinding}
* @param binding The {@link ValueBinding} to set, or <code>null</code>
* to remove any currently set {@link ValueBinding}
*
* @throws IllegalArgumentException if <code>name</code> is one of
* <code>id</code> or <code>parent</code>
* @throws NullPointerException if <code>name</code>
* is <code>null</code>
*
* @deprecated This has been replaced by {@link #setValueExpression}.
*/
public abstract void setValueBinding(String name, ValueBinding binding);
// The set of ValueExpressions for this component, keyed by property
// name This collection is lazily instantiated
// The set of ValueExpressions for this component, keyed by property
// name This collection is lazily instantiated
@Deprecated
protected Map<String,ValueExpression> bindings = null;
/**
* <p>Return the {@link ValueExpression} used to calculate the value for the
* specified attribute or property name, if any.</p>
*
* <p>This method must be overridden and implemented for components that
* comply with JSF 1.2 and later.</p>
*
* @since 1.2
*
* @param name Name of the attribute or property for which to retrieve a
* {@link ValueExpression}
*
* @throws NullPointerException if <code>name</code>
* is <code>null</code>
*
*/
public ValueExpression getValueExpression(String name) {
if (name == null) {
throw new NullPointerException();
}
Map<String,ValueExpression> map = (Map<String,ValueExpression>)
getStateHelper().get(UIComponentBase.PropertyKeys.bindings);
return ((map != null) ? map.get(name) : null);
}
/**
* <p>Set the {@link ValueExpression} used to calculate the value
* for the specified attribute or property name, if any.</p>
*
* <p>The implementation must call {@link
* ValueExpression#isLiteralText} on the argument
* <code>expression</code>. If <code>isLiteralText()</code> returns
* <code>true</code>, invoke {@link ValueExpression#getValue} on the
* argument expression and pass the result as the <code>value</code>
* parameter in a call to <code>this.{@link
* #getAttributes()}.put(name, value)</code> where <code>name</code>
* is the argument <code>name</code>. If an exception is thrown as
* a result of calling {@link ValueExpression#getValue}, wrap it in
* a {@link javax.faces.FacesException} and re-throw it. If
* <code>isLiteralText()</code> returns <code>false</code>, simply
* store the un-evaluated <code>expression</code> argument in the
* collection of <code>ValueExpression</code>s under the key given
* by the argument <code>name</code>.</p>
*
* <p>This method must be overridden and implemented for components that
* comply with JSF 1.2 and later.</p>
*
* @since 1.2
*
* @param name Name of the attribute or property for which to set a
* {@link ValueExpression}
* @param binding The {@link ValueExpression} to set, or <code>null</code>
* to remove any currently set {@link ValueExpression}
*
* @throws IllegalArgumentException if <code>name</code> is one of
* <code>id</code> or <code>parent</code>
* @throws NullPointerException if <code>name</code>
* is <code>null</code>
*
*/
public void setValueExpression(String name, ValueExpression binding) {
if (name == null) {
throw new NullPointerException();
} else if ("id".equals(name) || "parent".equals(name)) {
throw new IllegalArgumentException();
}
if (binding != null) {
if (!binding.isLiteralText()) {
//if (bindings == null) {
// //noinspection CollectionWithoutInitialCapacity
// bindings = new HashMap<String, ValueExpression>();
//}
// add this binding name to the 'attributesThatAreSet' list
//List<String> sProperties = (List<String>)
// getStateHelper().get(PropertyKeysPrivate.attributesThatAreSet);
List<String> sProperties =
(List<String>) getStateHelper().get(PropertyKeysPrivate.attributesThatAreSet);
if (sProperties == null) {
getStateHelper().add(PropertyKeysPrivate.attributesThatAreSet, name);
} else if (!sProperties.contains(name)) {
getStateHelper().add(PropertyKeysPrivate.attributesThatAreSet, name);
}
getStateHelper().put(UIComponentBase.PropertyKeys.bindings,
name,
binding);
//bindings.put(name, binding);
} else {
ELContext context =
FacesContext.getCurrentInstance().getELContext();
try {
getAttributes().put(name, binding.getValue(context));
} catch (ELException ele) {
throw new FacesException(ele);
}
}
} else {
//if (bindings != null) {
// remove this binding name from the 'attributesThatAreSet' list
// List<String> sProperties = getAttributesThatAreSet(false);
// if (sProperties != null) {
// sProperties.remove(name);
// }
getStateHelper().remove(PropertyKeysPrivate.attributesThatAreSet,
name);
getStateHelper().remove(UIComponentBase.PropertyKeys.bindings, name);
//bindings.remove(name);
// if (bindings.isEmpty()) {
// bindings = null;
// }
}
// }
}
// -------------------------------------------------------------- Properties
boolean initialState;
/**
* <p class="changed_added_2_0">An implementation of {@link
* PartialStateHolder#markInitialState}, this method is called by
* the runtime to indicate that the instance should start tracking
* changes to its state.</p>
* @since 2.0
*/
public void markInitialState() {
initialState = true;
}
/**
* <p class="changed_added_2_0">An implementation of {@link
* PartialStateHolder#initialStateMarked}, this method is called by
* the runtime to test if the {@link
* PartialStateHolder#markInitialState} method was called.</p>
* @since 2.0
*/
public boolean initialStateMarked() {
return initialState;
}
/**
* <p class="changed_added_2_0">An implementation of {@link
* PartialStateHolder#clearInitialState}, this method is called by
* the runtime to tell the instance to stop tracking state
* changes.</p>
* @since 2.0
*/
public void clearInitialState() {
initialState = false;
}
/**
* <p class="changed_added_2_0">Return the {@link StateHelper}
* instance used to help this component implement {@link
* PartialStateHolder}.</p>
* @since 2.0
*/
protected StateHelper getStateHelper() {
return getStateHelper(true);
}
/**
* <p class="changed_added_2_0">Like {@link #getStateHelper()}, but
* only create a state helper instance if the argument
* <code>creat</code> is <code>true</code>.</p>
* @param create if <code>true</code>, a new {@link StateHelper}
* instance will be created if it does not exist already. If
* <code>false</code>, and there is no existing
* <code>StateHelper</code> instance, one will not be created and
* <code>null</code> will be returned.
* @since 2.0
*/
protected StateHelper getStateHelper(boolean create) {
if (create && stateHelper == null) {
stateHelper = new ComponentStateHelper(this);
}
return stateHelper;
}
/**
* <p class="changed_added_2_1">Return the {@link
* TransientStateHelper} instance for this <code>UIComponent</code>
* instance. The default implementation simply calls through to
* {@link #getTransientStateHelper(boolean)} passing <code>true</code>
* as the argument.</p>
*
* @since 2.1
*/
public final TransientStateHelper getTransientStateHelper()
{
return getTransientStateHelper(true);
}
/**
* <p class="changed_added_2_1">Return the {@link
* TransientStateHelper} instance for this <code>UIComponent</code>
* instance.</p>
*
* @param create if <code>true</code> create, if necessary, any
* internal data structures. If <code>false</code>, do not create
* any instances. In this case, it is possible for this method to
* return <code>null</code>.
*
* @since 2.1
*/
public TransientStateHelper getTransientStateHelper(boolean create) {
if (create && stateHelper == null) {
stateHelper = new ComponentStateHelper(this);
}
return stateHelper;
}
/**
* <p class="changed_added_2_1">For components that need to support
* the concept of transient state, this method will restore any
* state saved on a prior call to {@link #saveTransientState}.</p>
*
* @since 2.1
*/
public void restoreTransientState(FacesContext context, Object state)
{
boolean forceCreate = (state != null);
TransientStateHelper helper = getTransientStateHelper(forceCreate);
if (helper != null) {
helper.restoreTransientState(context, state);
}
}
/**
* <p class="changed_added_2_1">For components that need to support
* the concept of transient state, this method will save any state
* that is known to be transient in nature.</p>
*
* @since 2.1
*/
public Object saveTransientState(FacesContext context)
{
TransientStateHelper helper = getTransientStateHelper(false);
return (helper == null) ? null : helper.saveTransientState(context);
}
private boolean isInView;
/**
* <p class="changed_added_2_0">Return <code>true</code> if this
* component is within the view hierarchy otherwise
* <code>false</code></code>
*
* @since 2.0
*/
public boolean isInView() {
return isInView;
}
/**
* <p class="changed_added_2_0">Updates the status as to whether or
* not this component is currently within the view hierarchy.
* <strong>This method must never be called by developers; a {@link
* UIComponent}'s internal implementation will call it as components
* are added to or removed from a parent's child <code>List</code>
* or facet <code>Map</code></strong>.</p>
*
* @param isInView flag indicating whether or not this component is within
* the view hierachy
*
* @since 2.0
*/
public void setInView(boolean isInView) {
this.isInView = isInView;
}
/**
* <p class="changed_added_2_0">Enable EL to access the <code>clientId</code>
* of a component. This is particularly useful in combination with the
* <code>component</code> and <code>cc</code> implicit
* objects. A default implementation is provided that simply calls
* {@link FacesContext#getCurrentInstance} and then calls through to
* {@link #getClientId(FacesContext)}.</p>
*
* @since 2.0
*/
public String getClientId() {
FacesContext context = FacesContext.getCurrentInstance();
return getClientId(context);
}
/**
* <p>Return a client-side identifier for this component, generating
* one if necessary. The associated {@link Renderer}, if any,
* will be asked to convert the clientId to a form suitable for
* transmission to the client.</p>
*
* <p>The return from this method must be the same value throughout
* the lifetime of the instance, unless the <code>id</code> property
* of the component is changed, or the component is placed in
* a {@link NamingContainer} whose client ID changes (for example,
* {@link UIData}). However, even in these cases, consecutive
* calls to this method must always return the same value. The
* implementation must follow these steps in determining the
* clientId:</p>
*
* <p>Find the closest ancestor to <b>this</b> component in the view
* hierarchy that implements <code>NamingContainer</code>. Call
* <code>getContainerClientId()</code> on it and save the result as
* the <code>parentId</code> local variable. Call {@link #getId} on
* <b>this</b> component and save the result as the
* <code>myId</code> local variable. If <code>myId</code> is
* <code>null</code>, call
* <code>context.getViewRoot().createUniqueId()</code> and assign
* the result to myId. If <code>parentId</code> is
* non-<code>null</code>, let <code>myId</code> equal <code>parentId
* + {@link UINamingContainer#getSeparatorChar} + myId</code>. Call
* {@link Renderer#convertClientId}, passing <code>myId</code>, and
* return the result.</p>
*
* @param context The {@link FacesContext} for the current request
*
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract String getClientId(FacesContext context);
/**
* <p>Allow components that implement {@link NamingContainer} to
* selectively disable prepending their clientId to their
* descendent's clientIds by breaking the prepending logic into a
* seperately callable method. See {@link #getClientId} for usage.</p>
*
* <p>By default, this method will call through to {@link
* #getClientId} and return the result.
*
* @since 1.2
*
* @throws NullPointerException if <code>context</code> is
* <code>null</code>
*/
public String getContainerClientId(FacesContext context) {
if (context == null) {
throw new NullPointerException();
}
return this.getClientId(context);
}
/**
* <p>Return the identifier of the component family to which this
* component belongs. This identifier, in conjunction with the value
* of the <code>rendererType</code> property, may be used to select
* the appropriate {@link Renderer} for this component instance.</p>
*/
public abstract String getFamily();
/**
* <p>Return the component identifier of this {@link UIComponent}.</p>
*/
public abstract String getId();
/**
* <p>Set the component identifier of this {@link UIComponent} (if any).
* Component identifiers must obey the following syntax restrictions:</p>
* <ul>
* <li>Must not be a zero-length String.</li>
* <li>First character must be a letter or an underscore ('_').</li>
* <li>Subsequent characters must be a letter, a digit,
* an underscore ('_'), or a dash ('-').</li>
* <li>
* </ul>
*
* <p>Component identifiers must also obey the following semantic
* restrictions (note that this restriction is <strong>NOT</strong>
* enforced by the <code>setId()</code> implementation):</p>
* <ul>
* <li>The specified identifier must be unique among all the components
* (including facets) that are descendents of the nearest ancestor
* {@link UIComponent} that is a {@link NamingContainer}, or within
* the scope of the entire component tree if there is no such
* ancestor that is a {@link NamingContainer}.</li>
* </ul>
*
* @param id The new component identifier, or <code>null</code> to indicate
* that this {@link UIComponent} does not have a component identifier
*
* @throws IllegalArgumentException if <code>id</code> is not
* syntactically valid
*/
public abstract void setId(String id);
/**
* <p>Return the parent {@link UIComponent} of this
* <code>UIComponent</code>, if any. A component must allow child
* components to be added to and removed from the list of children
* of this component, even though the child component returns null
* from <code>getParent( )</code>.</p>
*/
public abstract UIComponent getParent();
/**
* <p class="changed_modified_2_0"><span
* class="changed_modified_2_0_rev_a">Set</span> the parent
* <code>UIComponent</code> of this <code>UIComponent</code>. <span
* class="changed_added_2_0"><span
* class="changed_modified_2_0_rev_a">If
* <code>parent.isInView()</code> returns <code>true</code>, calling
* this method will first cause a {@link
* javax.faces.event.PreRemoveFromViewEvent} to be published, for
* this node, and then the children of this node. Then, once the
* re-parenting has occurred, a {@link
* javax.faces.event.PostAddToViewEvent} will be published as well,
* first for this node, and then for the node's children, <span
* class="changed_modified_2_0_rev_a">but only if any of the
* following conditions are true.</span></span></p>
* <div class="changed_modified_2_0_rev_a">
* <ul>
* <li><p>{@link
* javax.faces.context.FacesContext#getCurrentPhaseId} returns
* {@link javax.faces.event.PhaseId#RESTORE_VIEW} and partial
* state saving is enabled.</p></li>
* <li><p>{@link javax.faces.context.FacesContext#isPostback}
* returns <code>false</code> and {@link
* javax.faces.context.FacesContext#getCurrentPhaseId} returns
* something other than {@link
* javax.faces.event.PhaseId#RESTORE_VIEW}</p></li>
* </ul>
* </div>
* <p class="changed_modified_2_0"> <strong>This method must never
* be called by developers; a {@link UIComponent}'s internal
* implementation will call it as components are added to or removed
* from a parent's child <code>List</code> or facet
* <code>Map</code></strong></span>.</p>
*
* @param parent The new parent, or <code>null</code> for the root node
* of a component tree
*/
public abstract void setParent(UIComponent parent);
/**
* <p>Return <code>true</code> if this component (and its children)
* should be rendered during the <em>Render Response</em> phase
* of the request processing lifecycle.</p>
*/
public abstract boolean isRendered();
/**
* <p>Set the <code>rendered</code> property of this
* {@link UIComponent}.</p>
*
* @param rendered If <code>true</code> render this component;
* otherwise, do not render this component
*/
public abstract void setRendered(boolean rendered);
/**
* <p>Return the {@link Renderer} type for this {@link UIComponent}
* (if any).</p>
*/
public abstract String getRendererType();
/**
* <p>Set the {@link Renderer} type for this {@link UIComponent},
* or <code>null</code> for components that render themselves.</p>
*
* @param rendererType Logical identifier of the type of
* {@link Renderer} to use, or <code>null</code> for components
* that render themselves
*/
public abstract void setRendererType(String rendererType);
/**
* <p>Return a flag indicating whether this component is responsible
* for rendering its child components. The default implementation
* in {@link UIComponentBase#getRendersChildren} tries to find the
* renderer for this component. If it does, it calls {@link
* Renderer#getRendersChildren} and returns the result. If it
* doesn't, it returns false. As of version 1.2 of the JavaServer
* Faces Specification, component authors are encouraged to return
* <code>true</code> from this method and rely on {@link
* UIComponentBase#encodeChildren}.</p>
*/
public abstract boolean getRendersChildren();
private Map<String, String> resourceBundleMap = null;
/**
* <p class="changed_added_2_0">Return a
* <code>Map<String,String></code> of the
* <code>ResourceBundle</code> for this component. A component may
* have a <code>ResourceBundle</code> associated with it. This
* bundle may contain localized properties relating to instances of
* this component. The default implementation first looks for a
* <code>ResourceBundle</code> with a base name equal to the fully
* qualified class name of the current <code>UIComponent this</code>
* and <code>Locale</code> equal to the <code>Locale</code> of the
* current <code>UIViewRoot</code>. If no such bundle is found, and
* the component is a composite component, let <em>resourceName</em>
* be the <em>resourceName</em> of the {@link Resource} for this
* composite component, replacing the file extension with
* ".properties". Let <em>libraryName</em> be the
* <em>libraryName</em> of the the {@link Resource} for this
* composite component. Call {@link
* javax.faces.application.ResourceHandler#createResource(java.lang.String,java.lang.String)},
* passing the derived <em>resourceName</em> and
* <em>libraryName</em>. Note that this will automatically allow
* for the localization of the <code>ResourceBundle</code> due to
* the localization facility implemented in
* <code>createResource</code>, which is specified in section
* JSF.2.6.1.3 of the spec prose document. If the resultant {@link
* Resource} exists and can be found, the <code>InputStream</code>
* for the resource is used to create a <code>ResourceBundle</code>.
* If either of the two previous steps for obtaining the
* <code>ResourceBundle</code> for this component is successful, the
* <code>ResourceBundle</code> is wrapped in a
* <code>Map<String,String></code> and returned. Otherwise
* <code>Collections.EMPTY_MAP</code> is returned.</p>
*
* @since 2.0
*/
public Map<String,String> getResourceBundleMap() {
if (null == resourceBundleMap) {
// See if there is a ResourceBundle under the FQCN for this class
String className = this.getClass().getName();
Locale currentLocale = null;
FacesContext context = null;
UIViewRoot root = null;
ResourceBundle resourceBundle = null;
// Step 1: look for a ResourceBundle under the FQCN of this instance
if (null != (context = FacesContext.getCurrentInstance())) {
if (null != (root = context.getViewRoot())) {
currentLocale = root.getLocale();
}
}
if (null == currentLocale) {
currentLocale = Locale.getDefault();
}
try {
resourceBundle =
ResourceBundle.getBundle(className, currentLocale);
} catch (MissingResourceException e) {
// It is not an error if there is no ResourceBundle
}
// Step 2: if this is a composite component, look for a
// ResourceBundle as a Resource
if (null == resourceBundle) {
if (this.getAttributes().containsKey(Resource.COMPONENT_RESOURCE_KEY)) {
Resource ccResource = (Resource)
this.getAttributes().get(Resource.COMPONENT_RESOURCE_KEY);
if (null != ccResource) {
if (null != (ccResource =
findComponentResourceBundleLocaleMatch(context,
ccResource.getResourceName(),
ccResource.getLibraryName()))) {
InputStream propertiesInputStream = null;
try {
propertiesInputStream = ccResource.getInputStream();
resourceBundle = new PropertyResourceBundle(propertiesInputStream);
} catch (IOException ex) {
Logger.getLogger(UIComponent.class.getName()).log(Level.SEVERE, null, ex);
} finally{
if(null != propertiesInputStream){
try{
propertiesInputStream.close();
} catch(IOException ioe){
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, null, ioe);
}
}
}
}
}
}
}
}
// Step 3: if the previous steps yielded a ResourceBundle, wrap it
// with a Map
if (null != resourceBundle) {
final ResourceBundle bundle = resourceBundle;
resourceBundleMap =
new Map() {
// this is an immutable Map
public String toString() {
StringBuffer sb = new StringBuffer();
Iterator<Map.Entry<String, Object>> entries =
this.entrySet().iterator();
Map.Entry<String, Object> cur;
while (entries.hasNext()) {
cur = entries.next();
sb.append(cur.getKey()).append(": ").append(cur.getValue()).append('\n');
}
return sb.toString();
}
// Do not need to implement for immutable Map
public void clear() {
throw new UnsupportedOperationException();
}
public boolean containsKey(Object key) {
boolean result = false;
if (null != key) {
result = (null != bundle.getObject(key.toString()));
}
return result;
}
public boolean containsValue(Object value) {
Enumeration<String> keys = bundle.getKeys();
boolean result = false;
while (keys.hasMoreElements()) {
Object curObj = bundle.getObject(keys.nextElement());
if ((curObj == value) ||
((null != curObj) && curObj.equals(value))) {
result = true;
break;
}
}
return result;
}
public Set<Map.Entry<String, Object>> entrySet() {
HashMap<String, Object> mappings = new HashMap<String, Object>();
Enumeration<String> keys = bundle.getKeys();
while (keys.hasMoreElements()) {
String key = keys.nextElement();
Object value = bundle.getObject(key);
mappings.put(key, value);
}
return mappings.entrySet();
}
@Override
public boolean equals(Object obj) {
return !((obj == null) || !(obj instanceof Map))
&& entrySet().equals(((Map) obj).entrySet());
}
public Object get(Object key) {
if (null == key) {
return null;
}
try {
return bundle.getObject(key.toString());
} catch (MissingResourceException e) {
return "???" + key + "???";
}
}
public int hashCode() {
return bundle.hashCode();
}
public boolean isEmpty() {
Enumeration<String> keys = bundle.getKeys();
return !keys.hasMoreElements();
}
public Set keySet() {
Set<String> keySet = new HashSet<String>();
Enumeration<String> keys = bundle.getKeys();
while (keys.hasMoreElements()) {
keySet.add(keys.nextElement());
}
return keySet;
}
// Do not need to implement for immutable Map
public Object put(Object k, Object v) {
throw new UnsupportedOperationException();
}
// Do not need to implement for immutable Map
public void putAll(Map t) {
throw new UnsupportedOperationException();
}
// Do not need to implement for immutable Map
public Object remove(Object k) {
throw new UnsupportedOperationException();
}
public int size() {
int result = 0;
Enumeration<String> keys = bundle.getKeys();
while (keys.hasMoreElements()) {
keys.nextElement();
result++;
}
return result;
}
public java.util.Collection values() {
ArrayList<Object> result = new ArrayList<Object>();
Enumeration<String> keys = bundle.getKeys();
while (keys.hasMoreElements()) {
result.add(
bundle.getObject(keys.nextElement()));
}
return result;
}
};
}
if (null == resourceBundleMap) {
resourceBundleMap = Collections.EMPTY_MAP;
}
}
return resourceBundleMap;
}
// PENDING(rlubke): I'm sure there's a more efficient
// way to handle this.
private Resource findComponentResourceBundleLocaleMatch(FacesContext context,
String resourceName, String libraryName) {
Resource result = null;
ResourceBundle resourceBundle = null;
int i;
if (-1 != (i = resourceName.lastIndexOf("."))) {
resourceName = resourceName.substring(0, i) +
".properties";
if (null != context) {
result = context.getApplication().getResourceHandler().
createResource(resourceName, libraryName);
InputStream propertiesInputStream = null;
try {
propertiesInputStream = result.getInputStream();
resourceBundle = new PropertyResourceBundle(propertiesInputStream);
} catch (IOException ex) {
Logger.getLogger(UIComponent.class.getName()).log(Level.SEVERE, null, ex);
} finally{
if(null != propertiesInputStream){
try{
propertiesInputStream.close();
} catch(IOException ioe){
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, null, ioe);
}
}
}
}
}
}
result = (null != resourceBundle) ? result : null;
return result;
}
// This is necessary for JSF components that extend from UIComponent
// directly rather than extending from UIComponentBase. Such components
// may need to have implementations provided for methods that originated
// from a spec version more recent than the version with which the component
// complies. Currently this private property is only consulted in the
// getValueExpression() method.
// private boolean isUIComponentBase;
// private boolean isUIComponentBaseIsSet = false;
//
// private boolean isUIComponentBase() {
// if (!isUIComponentBaseIsSet) {
// isUIComponentBase = (this instanceof UIComponentBase);
// }
//
// return isUIComponentBase;
// }
// ------------------------------------------------- Tree Management Methods
/**
* <p><span class="changed_modified_2_0">Return</span> a mutable
* <code>List</code> representing the child {@link UIComponent}s
* associated with this component. The returned implementation must
* support all of the standard and optional <code>List</code>
* methods, plus support the following additional requirements:</p>
* <ul> <li>The <code>List</code> implementation must implement the
* <code>java.io.Serializable</code> interface.</li> <li>Any attempt
* to add a <code>null</code> must throw a NullPointerException</li>
* <li>Any attempt to add an object that does not implement {@link
* UIComponent} must throw a ClassCastException.</li> <li>Whenever a
* new child component is added, the <code>parent</code> property of
* the child must be set to this component instance. If the
* <code>parent</code> property of the child was already non-null,
* the child must first be removed from its previous parent (where
* it may have been either a child or a facet).</li> <li>Whenever an
* existing child component is removed, the <code>parent</code>
* property of the child must be set to <code>null</code>.</li>
* <li class="changed_modified_2_1"><p>After the child component has
* been added to the view, {@link
* javax.faces.application.Application#publishEvent} must be
* called, passing {@link
* javax.faces.event.PostAddToViewEvent}<code>.class</code> as
* the first argument and the newly added component as the
* second argument if any the following cases are true.</p>
*
* <ul>
* <li><p>{@link
* javax.faces.context.FacesContext#getCurrentPhaseId} returns
* {@link javax.faces.event.PhaseId#RESTORE_VIEW} and partial
* state saving is enabled.</p></li>
* <li><p>{@link javax.faces.context.FacesContext#isPostback}
* returns <code>false</code> and {@link
* javax.faces.context.FacesContext#getCurrentPhaseId} returns
* something other than {@link
* javax.faces.event.PhaseId#RESTORE_VIEW}</p></li>
* </ul>
* </li>
* </ul>
*/
public abstract List<UIComponent> getChildren();
/**
* <p>Return the number of child {@link UIComponent}s that are
* associated with this {@link UIComponent}. If there are no
* children, this method must return 0. The method must not cause
* the creation of a child component list.</p>
*/
public abstract int getChildCount();
/**
* <p><span class="changed_modified_2_2">Search</span> for and
* return the {@link UIComponent} with an <code>id</code> that
* matches the specified search expression (if any), according to
* the algorithm described below.</p>
* <p class="changed_added_2_2">WARNING: The found
* <code>UIComponent</code> instance, if any, is returned
* <strong>without</strong> regard for its tree traversal context.
* Retrieving an EL-bound attribute from the component is not safe.
* EL expressions can contain implicit objects, such as
* <code>#{component}</code>, which assume they are being evaluated
* within the scope of a tree traversal context. Evaluating
* expressions with these kinds of implicit objects outside of a
* tree traversal context produces undefined results. See {@link
* #invokeOnComponent} for a method that <strong>does</strong>
* correctly account for the tree traversal context when operating
* on the found <code>UIComponent</code> instance. {@link #invokeOnComponent}
* is also useful to find components given a simple <code>clientId</code>.
*
* <p>Component identifiers are required to be unique within the scope of
* the closest ancestor {@link NamingContainer} that encloses this
* component (which might be this component itself). If there are no
* {@link NamingContainer} components in the ancestry of this component,
* the root component in the tree is treated as if it were a
* {@link NamingContainer}, whether or not its class actually implements
* the {@link NamingContainer} interface.</p>
*
* <p>A <em>search expression</em> consists of either an identifier
* (which is matched exactly against the <code>id</code> property of
* a {@link UIComponent}, or a series of such identifiers linked by
* the {@link UINamingContainer#getSeparatorChar} character value.
* The search algorithm should operates as follows, though alternate
* alogrithms may be used as long as the end result is the same:</p>
* <ul>
* <li>Identify the {@link UIComponent} that will be the base for searching,
* by stopping as soon as one of the following conditions is met:
* <ul>
* <li>If the search expression begins with the the separator character
* (called an "absolute" search expression),
* the base will be the root {@link UIComponent} of the component
* tree. The leading separator character will be stripped off,
* and the remainder of the search expression will be treated as
* a "relative" search expression as described below.</li>
* <li>Otherwise, if this {@link UIComponent} is a
* {@link NamingContainer} it will serve as the basis.</li>
* <li>Otherwise, search up the parents of this component. If
* a {@link NamingContainer} is encountered, it will be the base.
* </li>
* <li>Otherwise (if no {@link NamingContainer} is encountered)
* the root {@link UIComponent} will be the base.</li>
* </ul></li>
* <li>The search expression (possibly modified in the previous step) is now
* a "relative" search expression that will be used to locate the
* component (if any) that has an <code>id</code> that matches, within
* the scope of the base component. The match is performed as follows:
* <ul>
* <li>If the search expression is a simple identifier, this value is
* compared to the <code>id</code> property, and then recursively
* through the facets and children of the base {@link UIComponent}
* (except that if a descendant {@link NamingContainer} is found,
* its own facets and children are not searched).</li>
* <li>If the search expression includes more than one identifier
* separated by the separator character, the first identifier is
* used to locate a {@link NamingContainer} by the rules in the
* previous bullet point. Then, the <code>findComponent()</code>
* method of this {@link NamingContainer} will be called, passing
* the remainder of the search expression.</li>
* </ul></li>
* </ul>
*
* @param expr Search expression identifying the {@link UIComponent}
* to be returned
*
* @return the found {@link UIComponent}, or <code>null</code>
* if the component was not found.
*
* @throws IllegalArgumentException if an intermediate identifier
* in a search expression identifies a {@link UIComponent} that is
* not a {@link NamingContainer}
* @throws NullPointerException if <code>expr</code>
* is <code>null</code>
*/
public abstract UIComponent findComponent(String expr);
/**
* <p><span class="changed_modified_2_1">Starting</span> at this
* component in the View hierarchy, search for a component with a
* <code>clientId</code> equal to the argument <code>clientId</code>
* and, if found, call the {@link
* ContextCallback#invokeContextCallback} method on the argument
* <code>callback</code>, passing the current {@link FacesContext}
* and the found component as arguments. This method is similar to
* {@link #findComponent} but it does not support the leading {@link
* UINamingContainer#getSeparatorChar} syntax for searching from the
* root of the View.</p>
*
* <p>The default implementation will first check if
* <code>this.getClientId()</code> is equal to the argument
* <code>clientId</code>. If so, <span
* class="changed_added_2_1">first call {@link #pushComponentToEL},
* then</span> call the {@link
* ContextCallback#invokeContextCallback} method on the argument
* callback, passing through the <code>FacesContext</code> argument
* and passing this as the component argument. <span
* class="changed_added_2_1">Then call {@link #popComponentFromEL}.
* If an <code>Exception</code> is thrown by the callback, wrap it
* in a {@link FacesException} and re-throw it. Otherwise, return
* <code>true</code>.</p>
*
* <p>Otherwise, for each component returned by {@link
* #getFacetsAndChildren}, call <code>invokeOnComponent()</code>
* passing the arguments to this method, in order. The first time
* <code>invokeOnComponent()</code> returns true, abort traversing
* the rest of the <code>Iterator</code> and return
* <code>true</code>.</p>
*
* <p>When calling {@link ContextCallback#invokeContextCallback}
* the implementation of this method must guarantee that the state
* of the component passed to the callback correctly reflects the
* component's position in the View hierarchy with respect to any
* state found in the argument <code>clientId</code>. For example,
* an iterating component such as {@link UIData} will need to set
* its row index to correctly reflect the argument
* <code>clientId</code> before finding the appropriate child
* component backed by the correct row. When the callback returns,
* either normally or by throwing an <code>Exception</code> the
* implementation of this method must restore the state of the view
* to the way it was before invoking the callback.</p>
*
* <p>If none of the elements from {@link
* #getFacetsAndChildren} returned <code>true</code> from
* <code>invokeOnComponent()</code>, return <code>false</code>.</p>
*
* <p>Simple usage example to find a component by
* <code>clientId</code>.</p>
* <pre><code>
private UIComponent found = null;
private void doFind(FacesContext context, String clientId) {
context.getViewRoot().invokeOnComponent(context, clientId,
new ContextCallback() {
public void invokeContextCallback(FacesContext context,
UIComponent component) {
found = component;
}
});
}
* </code></pre>
*
*
* @since 1.2
*
* @param context the {@link FacesContext} for the current request
*
* @param clientId the client identifier of the component to be passed
* to the argument callback.
*
* @param callback an implementation of the Callback interface.
*
* @throws NullPointerException if any of the arguments are null
*
* @throws FacesException if the argument Callback throws an
* Exception, it is wrapped in a <code>FacesException</code> and re-thrown.
*
* @return <code>true</code> if the a component with the given
* <code>clientId</code> is found, the callback method was
* successfully invoked passing that component as an argument, and
* no Exception was thrown. Returns <code>false</code> if no
* component with the given <code>clientId</code> is found.
*
*/
public boolean invokeOnComponent(FacesContext context, String clientId,
ContextCallback callback) throws FacesException {
if (null == context || null == clientId || null == callback) {
throw new NullPointerException();
}
boolean found = false;
if (clientId.equals(this.getClientId(context))) {
try {
this.pushComponentToEL(context, this);
callback.invokeContextCallback(context, this);
return true;
} catch (Exception e) {
throw new FacesException(e);
} finally {
this.popComponentFromEL(context);
}
} else {
Iterator<UIComponent> itr = this.getFacetsAndChildren();
while (itr.hasNext() && !found) {
found = itr.next().invokeOnComponent(context, clientId,
callback);
}
}
return found;
}
// ------------------------------------------------ Facet Management Methods
/**
* <p>Return a mutable <code>Map</code> representing the facet
* {@link UIComponent}s associated with this {@link UIComponent},
* keyed by facet name (which must be a String). The returned
* implementation must support all of the standard and optional
* <code>Map</code> methods, plus support the following additional
* requirements:</p>
* <ul>
* <li>The <code>Map</code> implementation must implement
* the <code>java.io.Serializable</code> interface.</li>
* <li>Any attempt to add a <code>null</code> key or value must
* throw a NullPointerException.</li>
* <li>Any attempt to add a key that is not a String must throw
* a ClassCastException.</li>
* <li>Any attempt to add a value that is not a {@link UIComponent}
* must throw a ClassCastException.</li>
* <li>Whenever a new facet {@link UIComponent} is added:
* <ul>
* <li>The <code>parent</code> property of the component must be set to
* this component instance.</li>
* <li>If the <code>parent</code> property of the component was already
* non-null, the component must first be removed from its previous
* parent (where it may have been either a child or a facet).</li>
* </ul></li>
* <li>Whenever an existing facet {@link UIComponent} is removed:
* <ul>
* <li>The <code>parent</code> property of the facet must be
* set to <code>null</code>.</li>
* </ul></li>
* </ul>
*/
public abstract Map<String, UIComponent> getFacets();
/**
* <p>Return the number of facet {@link UIComponent}s that are
* associated with this {@link UIComponent}. If there are no
* facets, this method must return 0. The method must not cause
* the creation of a facet component map.</p>
*
* <p>For backwards compatability with classes that extend UIComponent
* directly, a default implementation is provided that simply calls
* {@link #getFacets} and then calls the <code>size()</code> method on the
* returned <code>Map</code>. A more optimized version of this method is
* provided in {@link UIComponentBase#getFacetCount}.
*
* @since 1.2
*/
public int getFacetCount() {
return (getFacets().size());
}
/**
* <p>Convenience method to return the named facet, if it exists, or
* <code>null</code> otherwise. If the requested facet does not
* exist, the facets Map must not be created.</p>
*
* @param name Name of the desired facet
*/
public abstract UIComponent getFacet(String name);
/**
* <p>Return an <code>Iterator</code> over the facet followed by child
* {@link UIComponent}s of this {@link UIComponent}.
* Facets are returned in an undefined order, followed by
* all the children in the order they are stored in the child list. If this
* component has no facets or children, an empty <code>Iterator</code>
* is returned.</p>
*
* <p>The returned <code>Iterator</code> must not support the
* <code>remove()</code> operation.</p>
*/
public abstract Iterator<UIComponent> getFacetsAndChildren();
// -------------------------------------------- Lifecycle Processing Methods
/**
* <p>Broadcast the specified {@link FacesEvent} to all registered
* event listeners who have expressed an interest in events of this
* type. Listeners are called in the order in which they were
* added.</p>
* <p class="changed_added_2_0">If the <code>event</code> is an instance of
* {@link javax.faces.event.BehaviorEvent} and the current
* <code>component</code> is the source of the <code>event</code>
* call {@link javax.faces.event.BehaviorEvent#getBehavior} to get the
* {@link javax.faces.component.behavior.Behavior} for the event.
* <span class="changed_modified_2_0_rev_a">Call {@link
* javax.faces.component.behavior.Behavior#broadcast(javax.faces.event.BehaviorEvent)}
* on the <code>Behavior</code> instance</span>.</p>
*
* @param event The {@link FacesEvent} to be broadcast
*
* @throws AbortProcessingException Signal the JavaServer Faces
* implementation that no further processing on the current event
* should be performed
* @throws IllegalArgumentException if the implementation class
* of this {@link FacesEvent} is not supported by this component
* @throws NullPointerException if <code>event</code> is
* <code>null</code>
*/
public abstract void broadcast(FacesEvent event)
throws AbortProcessingException;
/**
* <p>Decode any new state of this {@link UIComponent} from the
* request contained in the specified {@link FacesContext}, and store
* this state as needed.</p>
* <p>During decoding, events may be enqueued for later processing
* (by event listeners who have registered an interest), by calling
* <code>queueEvent()</code>.</p>
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract void decode(FacesContext context);
/**
* <p class="changed_added_2_0">Perform a tree visit starting at
* this node in the tree.</p>
*
* <div class="changed_added_2_0">
*
* <p>UIComponent.visitTree() implementations do not invoke the
* {@link VisitCallback} directly, but instead call {@link
* VisitContext#invokeVisitCallback} to invoke the callback. This
* allows {@code VisitContext} implementations to provide optimized
* tree traversals, for example by only calling the {@code
* VisitCallback} for a subset of components.</p>
*
* <p>UIComponent.visitTree() implementations must call
* UIComponent.pushComponentToEL() before performing the
* visit and UIComponent.popComponentFromEL() after the
* visit.</p>
*
* @param context the <code>VisitContext</code> for this visit
* @param callback the <code>VisitCallback</code> instance
* whose <code>visit</code> method will be called
* for each node visited.
* @return component implementations may return <code>true</code>
* to indicate that the tree visit is complete (eg. all components
* that need to be visited have been visited). This results in
* the tree visit being short-circuited such that no more components
* are visited.
*
* </div>
*
* @see VisitContext#invokeVisitCallback VisitContext.invokeVisitCallback()
*
* @since 2.0
*/
public boolean visitTree(VisitContext context,
VisitCallback callback) {
// First check to see whether we are visitable. If not
// short-circuit out of this subtree, though allow the
// visit to proceed through to other subtrees.
if (!isVisitable(context))
return false;
// Push ourselves to EL before visiting
FacesContext facesContext = context.getFacesContext();
pushComponentToEL(facesContext, null);
try {
// Visit ourselves. Note that we delegate to the
// VisitContext to actually perform the visit.
VisitResult result = context.invokeVisitCallback(this, callback);
// If the visit is complete, short-circuit out and end the visit
if (result == VisitResult.COMPLETE)
return true;
// Visit children if necessary
if (result == VisitResult.ACCEPT) {
Iterator<UIComponent> kids = this.getFacetsAndChildren();
while(kids.hasNext()) {
boolean done = kids.next().visitTree(context, callback);
// If any kid visit returns true, we are done.
if (done)
return true;
}
}
}
finally {
// Pop ourselves off the EL stack
popComponentFromEL(facesContext);
}
// Return false to allow the visit to continue
return false;
}
/**
* <p class="changed_added_2_0">Return <code>true</code> if this
* component should be visited, <code>false</code> otherwise.
* Called by {@link UIComponent#visitTree UIComponent.visitTree()}
* to determine whether this component satisfies the hints returned
* by {@link javax.faces.component.visit.VisitContext#getHints}.</p>
* <div class="changed_added_2_0">
* <p>If this method returns false, the tree visited is
* short-circuited such that neither the component nor any of its
* descendents will be visited></p>
* <p>Custom {@code visitTree()} implementations may call this
* method to determine whether the component is visitable before
* performing any visit-related processing.</p>
*
* </div>
*
* @since 2.0
*/
protected boolean isVisitable(VisitContext context) {
// VisitHints currently defines two hints that affect
// visitability: VIIST_RENDERED and VISIT_TRANSIENT.
// Check for both of these and if set, verify that
// we comply.
Set<VisitHint> hints = context.getHints();
if ((hints.contains(VisitHint.SKIP_UNRENDERED) &&
!this.isRendered()) ||
(hints.contains(VisitHint.SKIP_TRANSIENT) &&
this.isTransient())) {
return false;
}
return true;
}
/**
* <p><span class="changed_modified_2_0">If</span> our
* <code>rendered</code> property is <code>true</code>, render the
* beginning of the current state of this {@link UIComponent} to the
* response contained in the specified {@link FacesContext}.
* Call {@link #pushComponentToEL(javax.faces.context.FacesContext,javax.faces.component.UIComponent)}.
* Call {@link javax.faces.application.Application#publishEvent}, passing
* {@link javax.faces.event.PreRenderComponentEvent}<code>.class</code> as the
* first argument and the component instance to be rendered as the
* second argument.</p></li>
* <p>If a {@link Renderer} is associated with this {@link
* UIComponent}, the actual encoding will be delegated to
* {@link Renderer#encodeBegin(FacesContext, UIComponent)}.
* </p>
*
* <p class="changed_added_2_0">If our <code>rendered</code> property is
* <code>false</code>, call {@link #pushComponentToEL(javax.faces.context.FacesContext,javax.faces.component.UIComponent)}
* and return immediately.</p>
*
* @param context {@link FacesContext} for the response we are creating
*
* @throws IOException if an input/output error occurs while rendering
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract void encodeBegin(FacesContext context) throws IOException;
/**
* <p>If our <code>rendered</code> property is <code>true</code>,
* render the child {@link UIComponent}s of this {@link UIComponent}.
* This method will only be called
* if the <code>rendersChildren</code> property is <code>true</code>.</p>
*
* <p>If a {@link Renderer} is associated with this {@link UIComponent},
* the actual encoding will be delegated to
* {@link Renderer#encodeChildren(FacesContext, UIComponent)}.
* <span class="changed_modified_2_0">If no {@link Renderer} is associated
* with this {@link UIComponent}, iterate over each of the children of this
* component and call
* {@link #encodeAll(javax.faces.context.FacesContext)}.</span></p>
*
* @param context {@link FacesContext} for the response we are creating
*
* @throws IOException if an input/output error occurs while rendering
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract void encodeChildren(FacesContext context) throws IOException;
/**
* <p><span class="changed_modified_2_0">If</span> our
* <code>rendered</code> property is <code>true</code>, render the
* ending of the current state of this {@link UIComponent}.</p>
*
* <p>If a {@link Renderer} is associated with this {@link UIComponent},
* the actual encoding will be delegated to
* {@link Renderer#encodeEnd(FacesContext, UIComponent)}.</p>
*
* <p class="changed_added_2_0">Call {@link
* UIComponent#popComponentFromEL}. before returning regardless of the value
* of the <code>rendered</code> property.</p>
*
* @param context {@link FacesContext} for the response we are creating
*
* @throws IOException if an input/output error occurs while rendering
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract void encodeEnd(FacesContext context) throws IOException;
/**
* <p>If this component
* returns <code>true</code> from {@link #isRendered}, take the
* following action.</p>
*
* <p>Render this component and all its children that return
* <code>true</code> from <code>isRendered()</code>, regardless of
* the value of the {@link #getRendersChildren} flag.</p></li>
* @since 1.2
*
* @throws IOException if an input/output error occurs while rendering
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public void encodeAll(FacesContext context) throws IOException {
if (context == null) {
throw new NullPointerException();
}
if (!isRendered()) {
return;
}
encodeBegin(context);
if (getRendersChildren()) {
encodeChildren(context);
} else if (this.getChildCount() > 0) {
for (UIComponent kid : getChildren()) {
kid.encodeAll(context);
}
}
encodeEnd(context);
}
private static ArrayDeque<UIComponent> _getComponentELStack(String keyName, Map<Object, Object> contextAttributes)
{
ArrayDeque<UIComponent> elStack = (ArrayDeque<UIComponent>)contextAttributes.get(keyName);
if (elStack == null)
{
elStack = new ArrayDeque<UIComponent>();
contextAttributes.put(keyName, elStack);
}
return elStack;
}
// bugdb 18090503
/*
* Respecting the fact that someone may have decorated FacesContextFactory
* and thus skipped our saving of this init param, look for the init
* param and return its value. The return is saved in a transient ivar
* to provide performance while not perturbing state saving.
*/
private boolean isSetCurrentComponent(FacesContext context) {
if (null != isSetCurrentComponent) {
return isSetCurrentComponent;
}
Boolean bool = (Boolean) context.getAttributes().get(HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME);
if (null != bool) {
isSetCurrentComponent = bool;
} else {
String val = context.getExternalContext().getInitParameter(UIComponent.HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME);
isSetCurrentComponent = Boolean.valueOf(val);
}
return isSetCurrentComponent;
}
//private UIComponent previouslyPushed = null;
//private UIComponent previouslyPushedCompositeComponent = null;
//private boolean pushed;
//private int depth;
/**
* <p class="changed_added_2_0">Push the current
* <code>UIComponent</code> <code>this</code> to the {@link FacesContext}
* attribute map using the key {@link #CURRENT_COMPONENT} saving the previous
* <code>UIComponent</code> associated with {@link #CURRENT_COMPONENT} for a
* subsequent call to {@link #popComponentFromEL}.</p>
*
* <pclass="changed_added_2_0">This method and <code>popComponentFromEL()</code> form the basis for
* the contract that enables the EL Expression "<code>#{component}</code>" to
* resolve to the "current" component that is being processed in the
* lifecycle. The requirements for when <code>pushComponentToEL()</code> and
* <code>popComponentFromEL()</code> must be called are specified as
* needed in the javadoc for this class.</p>
*
* <p class="changed_added_2_0">After
* <code>pushComponentToEL()</code> returns, a call to {@link
* #getCurrentComponent} must return <code>this</code>
* <code>UIComponent</code> instance until
* <code>popComponentFromEL()</code> is called, after which point
* the previous <code>UIComponent</code> instance will be returned
* from <code>getCurrentComponent()</code></p>
*
* @param context the {@link FacesContext} for the current request
* @param component the <code>component</code> to push to the EL. If
* <code>component</code> is <code>null</code> the <code>UIComponent</code>
* instance that this call was invoked upon will be pushed to the EL.
*
* @throws NullPointerException if <code>context</code> is <code>null</code>
*
* @see javax.faces.context.FacesContext#getAttributes()
*
* @since 2.0
*/
public final void pushComponentToEL(FacesContext context, UIComponent component) {
if (context == null) {
throw new NullPointerException();
}
if (null == component) {
component = this;
}
Map<Object, Object> contextAttributes = context.getAttributes();
ArrayDeque<UIComponent> componentELStack = _getComponentELStack(_CURRENT_COMPONENT_STACK_KEY,
contextAttributes);
componentELStack.push(component);
component._isPushedAsCurrentRefCount++;
// we only do this because of the spec
boolean setCurrentComponent = isSetCurrentComponent(context);
if (setCurrentComponent) {
contextAttributes.put(UIComponent.CURRENT_COMPONENT, component);
}
// if the pushed component is a composite component, we need to update that
// stack as well
if (UIComponent.isCompositeComponent(component))
{
_getComponentELStack(_CURRENT_COMPOSITE_COMPONENT_STACK_KEY,
contextAttributes).push(component);
// we only do this because of the spec
if (setCurrentComponent) {
contextAttributes.put(UIComponent.CURRENT_COMPOSITE_COMPONENT, component);
}
}
}
// track whether we have been pushed as current in order to handle mismatched pushes and
// pops of EL context stack. We use a counter to handle cases where the same component
// is pushed on multiple times
private int _isPushedAsCurrentRefCount = 0;
// key used to look up current component stack if FacesContext attributes
private static final String _CURRENT_COMPONENT_STACK_KEY =
"javax.faces.component.CURRENT_COMPONENT_STACK";
// key used to look up current composite component stack if FacesContext attributes
private static final String _CURRENT_COMPOSITE_COMPONENT_STACK_KEY =
"javax.faces.component.CURRENT_COMPOSITE_COMPONENT_STACK";
/**
* <p class="changed_added_2_0">Pop the current
* <code>UIComponent</code> from the {@link FacesContext} attributes map
* so that the previous <code>UIComponent</code>, if any, becomes the current
* component.</p>
*
* @param context the {@link FacesContext} for the current request
*
* @throws NullPointerException if <code>context</code> is <code>null</code>
*
* @see javax.faces.context.FacesContext#getAttributes()
*
* @since 2.0
*/
public final void popComponentFromEL(FacesContext context)
{
if (context == null)
{
throw new NullPointerException();
}
// detect cases where the stack has become unbalanced. Due to how UIComponentBase
// implemented pushing and pooping of components from the ELContext, components that
// overrode just one of encodeBegin or encodeEnd, or only called super in one case
// will become unbalanced. Detect and correct for those cases here.
// detect case where push was never called. In that case, pop should be a no-op
if (_isPushedAsCurrentRefCount < 1) {
return;
}
Map<Object, Object> contextAttributes = context.getAttributes();
ArrayDeque<UIComponent> componentELStack = _getComponentELStack(_CURRENT_COMPONENT_STACK_KEY,
contextAttributes);
// check for the other unbalanced case, a component was pushed but never popped. Keep
// popping those components until we get to our component
for (UIComponent topComponent = componentELStack.peek();
topComponent != this;
topComponent = componentELStack.peek())
{
topComponent.popComponentFromEL(context);
}
// pop ourselves off of the stack
componentELStack.pop();
_isPushedAsCurrentRefCount--;
boolean setCurrentComponent = isSetCurrentComponent(context);
// update the current component with the new top of stack. We only do this because of the spec
if (setCurrentComponent) {
contextAttributes.put(UIComponent.CURRENT_COMPONENT, componentELStack.peek());
}
// if we're a composite component, we also have to pop ourselves off of the
// composite stack
if (UIComponent.isCompositeComponent(this))
{
ArrayDeque<UIComponent> compositeELStack=_getComponentELStack(_CURRENT_COMPOSITE_COMPONENT_STACK_KEY,
contextAttributes);
if (!compositeELStack.isEmpty()) {
compositeELStack.pop();
}
// update the current composite component with the new top of stack.
// We only do this because of the spec
if (setCurrentComponent) {
contextAttributes.put(UIComponent.CURRENT_COMPOSITE_COMPONENT, compositeELStack.peek());
}
}
}
// It is safe to cache this because components never go from being
// composite to non-composite.
private transient Boolean isCompositeComponent = null;
/**
* <p class="changed_added_2_0">Return <code>true</code> if
* <code>component</code> is a composite component, otherwise
* <code>false</code>.</p>
*
* @param component the {@link UIComponent} to test
*
* @throws NullPointerException if <code>component</code> is <code>null</code>
* @since 2.0
*/
public static boolean isCompositeComponent(UIComponent component) {
if (component == null) {
throw new NullPointerException();
}
boolean result = false;
if (null != component.isCompositeComponent) {
result = component.isCompositeComponent.booleanValue();
} else {
result = component.isCompositeComponent =
(component.getAttributes().containsKey(
Resource.COMPONENT_RESOURCE_KEY));
}
return result;
}
/**
* <p>
* Finds the nearest composite component parent of the specified component.
* </p>
*
* @param component the component from which to start the search from
*
* @return if <code>component</code> is <code>null</code>, return
* <code>null</code>, otherwise search the component's parent hierachy
* for the nearest parent composite component. If no parent composite
* component is found, return <code>null</code>
*
* @since 2.0
*/
public static UIComponent getCompositeComponentParent(UIComponent component) {
if (component == null) {
return null;
} else {
if (component.compositeParent != null) {
return component.compositeParent;
}
UIComponent parent = component.getParent();
while (parent != null) {
if (UIComponent.isCompositeComponent(parent)) {
if (component.isInView()) {
component.compositeParent = parent;
}
return parent;
}
parent = parent.getParent();
}
return null;
}
}
/**
* <p class="changed_added_2_0">Return the <code>UIComponent</code>
* instance that is currently processing. This is equivalent to
* evaluating the EL expression "<code>#{component}</code>" and
* doing a <code>getValue</code> operation on the resultant
* <code>ValueExpression</code>.</p>
*
* <p class="changed_added_2_0">This method must return
* <code>null</code> if there is no currently processing
* <code>UIComponent</code></p>
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*
* @since 2.0
*/
public static UIComponent getCurrentComponent(FacesContext context) {
Map<Object, Object> contextAttributes = context.getAttributes();
ArrayDeque<UIComponent> componentELStack = _getComponentELStack(_CURRENT_COMPONENT_STACK_KEY,
contextAttributes);
return componentELStack.peek();
}
/**
* <p class="changed_added_2_0">Return the closest ancestor
* component, relative to the component returned from {@link
* #getCurrentComponent}, that is a composite component, or
* <code>null</code> if no such component exists.</p>
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*
* @since 2.0
*/
public static UIComponent getCurrentCompositeComponent(FacesContext context) {
// return (UIComponent)context.getAttributes().get(UIComponent.CURRENT_COMPOSITE_COMPONENT);
Map<Object, Object> contextAttributes = context.getAttributes();
ArrayDeque<UIComponent> compositeELStack = _getComponentELStack(_CURRENT_COMPOSITE_COMPONENT_STACK_KEY,
contextAttributes);
return compositeELStack.peek();
}
// -------------------------------------------------- Event Listener Methods
/**
* <p>Add the specified {@link FacesListener} to the set of listeners
* registered to receive event notifications from this {@link UIComponent}.
* It is expected that {@link UIComponent} classes acting as event sources
* will have corresponding typesafe APIs for registering listeners of the
* required type, and the implementation of those registration methods
* will delegate to this method. For example:</p>
* <pre>
* public class FooEvent extends FacesEvent { ... }
*
* public interface FooListener extends FacesListener {
* public void processFoo(FooEvent event);
* }
*
* public class FooComponent extends UIComponentBase {
* ...
* public void addFooListener(FooListener listener) {
* addFacesListener(listener);
* }
* public void removeFooListener(FooListener listener) {
* removeFacesListener(listener);
* }
* ...
* }
* </pre>
*
* @param listener The {@link FacesListener} to be registered
*
* @throws NullPointerException if <code>listener</code>
* is <code>null</code>
*/
protected abstract void addFacesListener(FacesListener listener);
/**
* <p>Return an array of registered {@link FacesListener}s that are
* instances of the specified class. If there are no such registered
* listeners, a zero-length array is returned. The returned
* array can be safely be cast to an array strongly typed to
* an element type of <code>clazz</code>.</p>
*
* @param clazz Class that must be implemented by a {@link FacesListener}
* for it to be returned
*
* @throws IllegalArgumentException if <code>class</code> is not,
* and does not implement, {@link FacesListener}
* @throws NullPointerException if <code>clazz</code>
* is <code>null</code>
*/
protected abstract FacesListener[] getFacesListeners(Class clazz);
/**
* <p>Remove the specified {@link FacesListener} from the set of listeners
* registered to receive event notifications from this {@link UIComponent}.
*
* @param listener The {@link FacesListener} to be deregistered
*
* @throws NullPointerException if <code>listener</code>
* is <code>null</code>
*/
protected abstract void removeFacesListener(FacesListener listener);
/**
* <p>Queue an event for broadcast at the end of the current request
* processing lifecycle phase. The default implementation in
* {@link UIComponentBase} must delegate this call to the
* <code>queueEvent()</code> method of the parent {@link UIComponent}.</p>
*
* @param event {@link FacesEvent} to be queued
*
* @throws IllegalStateException if this component is not a
* descendant of a {@link UIViewRoot}
* @throws NullPointerException if <code>event</code>
* is <code>null</code>
*/
public abstract void queueEvent(FacesEvent event);
/**
* <p class="changed_modified_2_1">This implementation throws
* <code>UnsupportedOperationException</code> and is provided
* for the sole purpose of not breaking existing applications that extend
* this class. {@link UIComponentBase} provides the implementation of
* this method.</p>
*
* @since 2.1
*/
public void subscribeToEvent(Class<? extends SystemEvent> eventClass,
ComponentSystemEventListener componentListener) {
throw new UnsupportedOperationException();
}
/**
* <p class="changed_modified_2_1">This implementation throws
* <code>UnsupportedOperationException</code> and is provided
* for the sole purpose of not breaking existing applications that extend
* this class. {@link UIComponentBase} provides the implementation of
* this method.</p>
*
* @since 2.1
*/
public void unsubscribeFromEvent(Class<? extends SystemEvent> eventClass,
ComponentSystemEventListener componentListener) {
throw new UnsupportedOperationException();
}
/**
* <p class="changed_modified_2_1">This implementation throws
* <code>UnsupportedOperationException</code> and is provided
* for the sole purpose of not breaking existing applications that extend
* this class. {@link UIComponentBase} provides the implementation of
* this method.</p>
*
* @since 2.1
*/
public List<SystemEventListener> getListenersForEventClass(Class<? extends SystemEvent> eventClass) {
throw new UnsupportedOperationException();
}
/**
* <p class="changed_added_2_0">Starting with "this", return the closest
* component in the ancestry that is a <code>NamingContainer</code>
* or <code>null</code> if none can be found.</p>
*
* @since 2.0
*/
public UIComponent getNamingContainer() {
UIComponent namingContainer = this;
while (namingContainer != null) {
if (namingContainer instanceof NamingContainer) {
return namingContainer;
}
namingContainer = namingContainer.getParent();
}
return null;
}
// ------------------------------------------------ Lifecycle Phase Handlers
/**
* <p><span class="changed_modified_2_0">Perform</span> the
* component tree processing required by the <em>Restore View</em>
* phase of the request processing lifecycle for all facets of this
* component, all children of this component, and this component
* itself, as follows.</p> <ul> <li
* class="changed_modified_2_0">Call the <code>restoreState()</code>
* method of this component.</li>
*
* <li class="changed_added_2_0">Call
* {@link UIComponent#pushComponentToEL}. </li>
* <li>Call the <code>processRestoreState()</code> method of all
* facets and children of this {@link UIComponent} in the order
* determined by a call to <code>getFacetsAndChildren()</code>.
* <span class="changed_added_2_0">After returning from the
* <code>processRestoreState()</code> method on a child or facet,
* call {@link UIComponent#popComponentFromEL}</span></li>
* </ul>
*
* <p>This method may not be called if the state saving method is
* set to server.</p>
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract void processRestoreState(FacesContext context,
Object state);
/**
* <p><span class="changed_modified_2_0">Perform</span> the
* component tree processing required by the <em>Apply Request
* Values</em> phase of the request processing lifecycle for all
* facets of this component, all children of this component, and
* this component itself, as follows.</p>
* <ul>
* <li>If the <code>rendered</code> property of this {@link UIComponent}
* is <code>false</code>, skip further processing.</li>
* <li class="changed_added_2_0">Call {@link #pushComponentToEL}.</li>
* <li>Call the <code>processDecodes()</code> method of all facets
* and children of this {@link UIComponent}, in the order determined
* by a call to <code>getFacetsAndChildren()</code>.</li>
* <li>Call the <code>decode()</code> method of this component.</li>
* <li>Call {@link #popComponentFromEL} from inside of a
* <code>finally block, just before returning.</code></li>
* <li>If a <code>RuntimeException</code> is thrown during
* decode processing, call {@link FacesContext#renderResponse}
* and re-throw the exception.</li>
* </ul>
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract void processDecodes(FacesContext context);
/**
* <p class="changed_added_2_0">The default implementation performs
* the following action. If the argument <code>event</code> is an
* instance of {@link PostRestoreStateEvent}, call
* <code>this.</code>{@link #getValueExpression} passing the literal
* string “binding”, without the quotes, as the
* argument. If the result is non-<code>null</code>, set the value
* of the <code>ValueExpression</code> to be <code>this</code>.</p>
*/
public void processEvent(ComponentSystemEvent event) throws AbortProcessingException {
if (event instanceof PostRestoreStateEvent) {
assert(this == event.getComponent());
// if this component has a component value reference expression,
// make sure to populate the ValueExpression for it.
ValueExpression valueExpression;
if (null != (valueExpression = this.getValueExpression("binding"))) {
valueExpression.setValue(FacesContext.getCurrentInstance().getELContext(),
this);
}
isCompositeComponent = null;
}
}
/**
* <p><span class="changed_modified_2_0"><span
* class="changed_modified_2_0_rev_a">Perform</span></span> the component
* tree processing required by the <em>Process Validations</em>
* phase of the request processing lifecycle for all facets of this
* component, all children of this component, and this component
* itself, as follows.</p>
* <ul>
* <li>If the <code>rendered</code> property of this {@link UIComponent}
* is <code>false</code>, skip further processing.</li>
* <li class="changed_added_2_0">Call {@link #pushComponentToEL}.</li>
* <li>Call the <code>processValidators()</code> method of all facets
* and children of this {@link UIComponent}, in the order determined
* by a call to <code>getFacetsAndChildren()</code>.</li>
* <li><span class="changed_modified_2_0_rev_a">After returning from
* calling <code>getFacetsAndChildren()</code> call {@link
* UIComponent#popComponentFromEL}.</span></li> </ul>
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract void processValidators(FacesContext context);
/**
* <p><span class="changed_modified_2_0">Perform</span> the
* component tree processing required by the <em>Update Model
* Values</em> phase of the request processing lifecycle for all
* facets of this component, all children of this component, and
* this component itself, as follows.</p>
* <ul>
* <li>If the <code>rendered</code> property of this {@link
* UIComponent} is <code>false</code>, skip further processing.</li>
* <li class="changed_added_2_0">Call {@link
* #pushComponentToEL}.</li>
* <li>Call the <code>processUpdates()</code> method of all facets
* and children of this {@link UIComponent}, in the order determined
* by a call to <code>getFacetsAndChildren()</code>. <span
* class="changed_added_2_0">After returning from the
* <code>processUpdates()</code> method on a child or facet, call
* {@link UIComponent#popComponentFromEL}</span></li>
* </ul>
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract void processUpdates(FacesContext context);
/**
* <p><span class="changed_modified_2_0">Perform</span> the
* component tree processing required by the state saving portion of
* the <em>Render Response</em> phase of the request processing
* lifecycle for all facets of this component, all children of this
* component, and this component itself, as follows.</p>
* <ul>
*
* <li>consult the <code>transient</code> property of this
* component. If true, just return <code>null</code>.</li>
* <li class="changed_added_2_0">Call {@link
* #pushComponentToEL}.</li>
* <li>Call the <code>processSaveState()</code> method of all facets
* and children of this {@link UIComponent} in the order determined
* by a call to <code>getFacetsAndChildren()</code>, skipping
* children and facets that are transient. Ensure that {@link
* #popComponentFromEL} is called correctly after each child or
* facet.</li>
*
* <li>Call the <code>saveState()</code> method of this component.</li>
*
* <li>Encapsulate the child state and your state into a
* Serializable Object and return it.</li>
*
* </ul>
*
* <p>This method may not be called if the state saving method is
* set to server.</p>
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if <code>context</code>
* is <code>null</code>
*/
public abstract Object processSaveState(FacesContext context);
// ----------------------------------------------------- Convenience Methods
/**
* <p>Convenience method to return the {@link FacesContext} instance
* for the current request.</p>
*/
protected abstract FacesContext getFacesContext();
/**
* <p>Convenience method to return the {@link Renderer} instance
* associated with this component, if any; otherwise, return
* <code>null</code>.</p>
*
* @param context {@link FacesContext} for the current request
*/
protected abstract Renderer getRenderer(FacesContext context);
// --------------------------------------------------------- Package Private
static final class ComponentSystemEventListenerAdapter
implements ComponentSystemEventListener, SystemEventListener, StateHolder, FacesWrapper<ComponentSystemEventListener> {
ComponentSystemEventListener wrapped;
Class<?> instanceClass;
// -------------------------------------------------------- Constructors
ComponentSystemEventListenerAdapter() {
// necessary for state saving
}
ComponentSystemEventListenerAdapter(ComponentSystemEventListener wrapped,
UIComponent component) {
this.wrapped = wrapped;
this.instanceClass = component.getClass();
}
// ------------------------------------ Methods from SystemEventListener
public void processEvent(SystemEvent event) throws AbortProcessingException {
wrapped.processEvent((ComponentSystemEvent) event);
}
// ------------------------------------ Methods from SystemEventListener
public void processEvent(ComponentSystemEvent event) throws AbortProcessingException {
wrapped.processEvent(event);
}
public boolean isListenerForSource(Object component) {
if (wrapped instanceof SystemEventListener) {
return ((SystemEventListener) wrapped).isListenerForSource(component);
} else {
return instanceClass.isAssignableFrom(component.getClass());
}
}
// -------------------------------------------- Methods from StateHolder
public Object saveState(FacesContext context) {
if (context == null) {
throw new NullPointerException();
}
return new Object[] {
((wrapped instanceof UIComponent) ? null : new StateHolderSaver(context, wrapped)),
instanceClass
};
}
public void restoreState(FacesContext context, Object state) {
if (context == null) {
throw new NullPointerException();
}
if (state == null) {
return;
}
Object[] s = (Object[]) state;
Object listener = s[0];
wrapped = (ComponentSystemEventListener) ((listener == null)
? UIComponent .getCurrentComponent(context)
: ((StateHolderSaver) listener).restore(context));
instanceClass = (Class<?>) s[1];
}
public boolean isTransient() {
if (wrapped instanceof StateHolder) {
return ((StateHolder) wrapped).isTransient();
}
return false;
}
public void setTransient(boolean newTransientValue) {
// no-op
}
// ------------------------------------------- Methods from FacesWrapper
public ComponentSystemEventListener getWrapped() {
return wrapped;
}
// ------------------------------------------------------ Public Methods
@Override
public int hashCode() {
return (wrapped.hashCode() ^ instanceClass.hashCode());
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof ComponentSystemEventListenerAdapter)) {
return false;
}
ComponentSystemEventListenerAdapter in =
(ComponentSystemEventListenerAdapter) obj;
return (wrapped.equals(in.wrapped)
&& instanceClass.equals(in.instanceClass));
}
} // END ComponentSystemEventListenerAdapter
}