/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package javax.faces.component;
import java.util.*;
import javax.el.*;
import javax.faces.application.*;
import javax.faces.context.*;
import javax.faces.el.*;
import javax.faces.event.*;
public class UICommand extends UIComponentBase
implements ActionSource2
{
public static final String COMPONENT_FAMILY = "javax.faces.Command";
public static final String COMPONENT_TYPE = "javax.faces.Command";
private static final HashMap<String,PropEnum> _propMap
= new HashMap<String,PropEnum>();
private static final ActionListener []NULL_ACTION_LISTENERS
= new ActionListener[0];
private Object _value;
private ValueExpression _valueExpr;
private Boolean _immediate;
private ValueExpression _immediateExpr;
private MethodExpression _actionExpr;
private ActionListener []_actionListeners = NULL_ACTION_LISTENERS;
public UICommand()
{
setRendererType("javax.faces.Button");
}
/**
* Returns the component family, used to select the renderer.
*/
public String getFamily()
{
return COMPONENT_FAMILY;
}
//
// Properties
//
public Object getValue()
{
if (_value != null)
return _value;
else if (_valueExpr != null)
return Util.eval(_valueExpr, getFacesContext());
else
return null;
}
public void setValue(Object value)
{
_value = value;
}
//
// Render Properties
//
public boolean isImmediate()
{
if (_immediate != null)
return _immediate;
else if (_immediateExpr != null)
return Util.evalBoolean(_immediateExpr, getFacesContext());
else
return false;
}
public void setImmediate(boolean immediate)
{
_immediate = immediate;
}
//
// expression map override
//
/**
* Returns the value expression with the given name.
*/
@Override
public ValueExpression getValueExpression(String name)
{
if ("value".equals(name))
return _valueExpr;
else if ("immediate".equals(name))
return _immediateExpr;
else {
return super.getValueExpression(name);
}
}
/**
* Sets the value expression with the given name.
*/
@Override
public void setValueExpression(String name, ValueExpression expr)
{
if ("value".equals(name))
_valueExpr = expr;
else if ("immediate".equals(name))
_immediateExpr = expr;
super.setValueExpression(name, expr);
}
//
// Actions
//
@Override
public void broadcast(FacesEvent event)
{
super.broadcast(event);
if (event instanceof ActionEvent) {
ActionEvent actionEvent = (ActionEvent) event;
FacesContext context = FacesContext.getCurrentInstance();
// jsf/0235, jsf/31h6, jsf/31h8
ActionListener listener = context.getApplication().getActionListener();
if (listener != null) {
listener.processAction(actionEvent);
}
}
}
@Override
public void queueEvent(FacesEvent event)
{
if (event instanceof ActionEvent) {
event.setPhaseId(isImmediate()
? PhaseId.APPLY_REQUEST_VALUES
: PhaseId.INVOKE_APPLICATION);
}
super.queueEvent(event);
}
/**
* @deprecated
*/
public MethodBinding getAction()
{
if (_actionExpr == null)
return null;
else if (_actionExpr instanceof MethodExpressionAdapter)
return ((MethodExpressionAdapter) _actionExpr).getBinding();
else
return new MethodBindingAdapter(_actionExpr);
}
/**
* @deprecated
*/
public void setAction(MethodBinding action)
{
if (action != null)
_actionExpr = new MethodExpressionAdapter(action);
else
_actionExpr = null;
}
/**
* @deprecated
*/
public MethodBinding getActionListener()
{
FacesListener []listeners = getFacesListeners(FacesListener.class);
for (int i = 0; i < listeners.length; i++) {
if (listeners[i] instanceof ActionListenerAdapter) {
return ((ActionListenerAdapter) listeners[i]).getBinding();
}
}
return null;
}
/**
* @deprecated
*/
public void setActionListener(MethodBinding action)
{
if (action == null)
throw new NullPointerException();
FacesListener []listeners = getFacesListeners(FacesListener.class);
for (int i = 0; i < listeners.length; i++) {
if (listeners[i] instanceof ActionListenerAdapter) {
listeners[i] = new ActionListenerAdapter(action);
_actionListeners = null;
return;
}
}
addActionListener(new ActionListenerAdapter(action));
}
public void addActionListener(ActionListener listener)
{
if (listener == null)
throw new NullPointerException();
addFacesListener(listener);
_actionListeners = null;
}
public ActionListener []getActionListeners()
{
if (_actionListeners == null) {
_actionListeners =
(ActionListener[]) getFacesListeners(ActionListener.class);
}
return _actionListeners;
}
public void removeActionListener(ActionListener listener)
{
if (listener == null)
throw new NullPointerException();
removeFacesListener(listener);
_actionListeners = null;
}
public MethodExpression getActionExpression()
{
return _actionExpr;
}
public void setActionExpression(MethodExpression action)
{
if (action == null)
throw new NullPointerException();
_actionExpr = action;
}
//
// state
//
public Object saveState(FacesContext context)
{
return new Object[] {
super.saveState(context),
_value,
_immediate,
saveAttachedState(context, _actionExpr),
};
}
public void restoreState(FacesContext context, Object value)
{
Object []state = (Object []) value;
super.restoreState(context, state[0]);
int i = 1;
_value = state[i++];
_immediate = (Boolean) state[i++];
_actionListeners = null;
_actionExpr = (MethodExpression) restoreAttachedState(context, state[i++]);
}
//
// private helpers
//
private static enum PropEnum {
VALUE,
}
static class MethodExpressionAdapter
extends MethodExpression
implements StateHolder
{
private MethodBinding _binding;
private boolean _isTransient;
public MethodExpressionAdapter()
{
}
MethodExpressionAdapter(MethodBinding binding)
{
_binding = binding;
}
MethodBinding getBinding()
{
return _binding;
}
public boolean isLiteralText()
{
return false;
}
public String getExpressionString()
{
return _binding.getExpressionString();
}
public MethodInfo getMethodInfo(ELContext context)
throws javax.el.PropertyNotFoundException,
javax.el.MethodNotFoundException,
ELException
{
throw new UnsupportedOperationException();
}
public Object invoke(ELContext context,
Object[] params)
throws javax.el.PropertyNotFoundException,
javax.el.MethodNotFoundException,
ELException
{
return _binding.invoke(FacesContext.getCurrentInstance(), params);
}
public boolean isTransient()
{
return _isTransient;
}
public void setTransient(boolean aTransient)
{
_isTransient = aTransient;
}
public Object saveState(FacesContext context)
{
return saveAttachedState(context, _binding);
}
public void restoreState(FacesContext context, Object state)
{
_binding = (MethodBinding) restoreAttachedState(context, state);
}
public int hashCode()
{
return _binding.hashCode();
}
public boolean equals(Object o)
{
return (this == o);
}
}
static class MethodBindingAdapter extends MethodBinding
{
private MethodExpression _expr;
public MethodBindingAdapter()
{
}
public MethodBindingAdapter(MethodExpression expr)
{
_expr = expr;
}
public String getExpressionString()
{
return _expr.getExpressionString();
}
/**
* @deprecated
*/
public Object invoke(FacesContext context, Object []param)
throws EvaluationException, javax.faces.el.MethodNotFoundException
{
if (context == null)
throw new NullPointerException();
try {
return _expr.invoke(context.getELContext(), param);
} catch (javax.el.MethodNotFoundException e) {
throw new javax.faces.el.MethodNotFoundException(e);
} catch (ELException e) {
if (e.getCause() != null)
throw new EvaluationException(e.getCause());
else
throw new EvaluationException(e);
} catch (Exception e) {
throw new EvaluationException(e);
}
}
/**
* @deprecated
*/
public Class getType(FacesContext context)
throws EvaluationException, javax.faces.el.PropertyNotFoundException
{
try {
MethodInfo info = _expr.getMethodInfo(context.getELContext());
return info.getReturnType();
} catch (javax.el.MethodNotFoundException e) {
throw new javax.faces.el.MethodNotFoundException(e);
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new EvaluationException(e);
}
}
public String toString()
{
return "MethodBindingAdapter[" + _expr.getExpressionString() + "]";
}
}
static class ActionListenerAdapter implements ActionListener, StateHolder {
private MethodBinding _binding;
ActionListenerAdapter()
{
}
ActionListenerAdapter(MethodBinding binding)
{
_binding = binding;
}
MethodBinding getBinding()
{
return _binding;
}
public void processAction(ActionEvent event)
{
_binding.invoke(FacesContext.getCurrentInstance(),
new Object[] { event });
}
public Object saveState(FacesContext context)
{
return _binding.getExpressionString();
}
public void restoreState(FacesContext context, Object state)
{
Application app = context.getApplication();
String expr = (String) state;
_binding = app.createMethodBinding(expr, new Class[] { ActionEvent.class });
}
public boolean isTransient()
{
return false;
}
public void setTransient(boolean isTransient)
{
}
public String toString()
{
return "ActionListenerAdapter[" + _binding + "]";
}
}
static {
_propMap.put("value", PropEnum.VALUE);
}
}