/*
* The MIT License
*
* Copyright (c) 2004-2010, Sun Microsystems, Inc., Kohsuke Kawaguchi
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.model;
import hudson.RelativePath;
import hudson.XmlFile;
import hudson.BulkChange;
import hudson.Util;
import static hudson.Util.singleQuote;
import hudson.diagnosis.OldDataMonitor;
import hudson.model.listeners.SaveableListener;
import hudson.util.ReflectionUtils;
import hudson.util.ReflectionUtils.Parameter;
import hudson.views.ListViewColumn;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import org.kohsuke.stapler.*;
import org.springframework.util.StringUtils;
import org.jvnet.tiger_types.Types;
import org.apache.commons.io.IOUtils;
import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
import javax.servlet.ServletException;
import javax.servlet.RequestDispatcher;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.HashMap;
import java.util.Locale;
import java.util.Arrays;
import java.util.Collections;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.beans.Introspector;
/**
* Metadata about a configurable instance.
*
* <p>
* {@link Descriptor} is an object that has metadata about a {@link Describable}
* object, and also serves as a factory (in a way this relationship is similar
* to {@link Object}/{@link Class} relationship.
*
* A {@link Descriptor}/{@link Describable}
* combination is used throughout in Hudson to implement a
* configuration/extensibility mechanism.
*
* <p>
* Take the list view support as an example, which is implemented
* in {@link ListView} class. Whenever a new view is created, a new
* {@link ListView} instance is created with the configuration
* information. This instance gets serialized to XML, and this instance
* will be called to render the view page. This is the job
* of {@link Describable} — each instance represents a specific
* configuration of a view (what projects are in it, regular expression, etc.)
*
* <p>
* For Hudson to create such configured {@link ListView} instance, Hudson
* needs another object that captures the metadata of {@link ListView},
* and that is what a {@link Descriptor} is for. {@link ListView} class
* has a singleton descriptor, and this descriptor helps render
* the configuration form, remember system-wide configuration, and works as a factory.
*
* <p>
* {@link Descriptor} also usually have its associated views.
*
*
* <h2>Persistence</h2>
* <p>
* {@link Descriptor} can persist data just by storing them in fields.
* However, it is the responsibility of the derived type to properly
* invoke {@link #save()} and {@link #load()}.
*
* <h2>Reflection Enhancement</h2>
* {@link Descriptor} defines addition to the standard Java reflection
* and provides reflective information about its corresponding {@link Describable}.
* These are primarily used by tag libraries to
* keep the Jelly scripts concise.
*
* @author Kohsuke Kawaguchi
* @see Describable
*/
public abstract class Descriptor<T extends Describable<T>> implements Saveable {
/**
* Up to Hudson 1.61 this was used as the primary persistence mechanism.
* Going forward Hudson simply persists all the non-transient fields
* of {@link Descriptor}, just like others, so this is pointless.
*
* @deprecated since 2006-11-16
*/
@Deprecated
private transient Map<String,Object> properties;
/**
* The class being described by this descriptor.
*/
public transient final Class<? extends T> clazz;
private transient final Map<String,String> checkMethods = new ConcurrentHashMap<String,String>();
/**
* Lazily computed list of properties on {@link #clazz} and on the descriptor itself.
*/
private transient volatile Map<String, PropertyType> propertyTypes,globalPropertyTypes;
/**
* Represents a readable property on {@link Describable}.
*/
public static final class PropertyType {
//TODO: review and check whether we can do it private
public final Class clazz;
//TODO: review and check whether we can do it private
public final Type type;
private volatile Class itemType;
public Class getClazz() {
return clazz;
}
public Type getType() {
return type;
}
PropertyType(Class clazz, Type type) {
this.clazz = clazz;
this.type = type;
}
PropertyType(Field f) {
this(f.getType(),f.getGenericType());
}
PropertyType(Method getter) {
this(getter.getReturnType(),getter.getGenericReturnType());
}
public Enum[] getEnumConstants() {
return (Enum[])clazz.getEnumConstants();
}
/**
* If the property is a collection/array type, what is an item type?
*/
public Class getItemType() {
if(itemType==null)
itemType = computeItemType();
return itemType;
}
private Class computeItemType() {
if(clazz.isArray()) {
return clazz.getComponentType();
}
if(Collection.class.isAssignableFrom(clazz)) {
Type col = Types.getBaseClass(type, Collection.class);
if (col instanceof ParameterizedType)
return Types.erasure(Types.getTypeArgument(col,0));
else
return Object.class;
}
return null;
}
/**
* Returns {@link Descriptor} whose 'clazz' is the same as {@link #getItemType() the item type}.
*/
public Descriptor getItemTypeDescriptor() {
return Hudson.getInstance().getDescriptor(getItemType());
}
public Descriptor getItemTypeDescriptorOrDie() {
return Hudson.getInstance().getDescriptorOrDie(getItemType());
}
/**
* Returns all the descriptors that produce types assignable to the item type.
*/
public List<? extends Descriptor> getApplicableDescriptors() {
return Hudson.getInstance().getDescriptorList(clazz);
}
}
protected Descriptor(Class<? extends T> clazz) {
this.clazz = clazz;
// doing this turns out to be very error prone,
// as field initializers in derived types will override values.
// load();
}
/**
* Infers the type of the corresponding {@link Describable} from the outer class.
* This version works when you follow the common convention, where a descriptor
* is written as the static nested class of the describable class.
*
* @since 1.278
*/
protected Descriptor() {
this.clazz = (Class<T>)getClass().getEnclosingClass();
if(clazz==null)
throw new AssertionError(getClass()+" doesn't have an outer class. Use the constructor that takes the Class object explicitly.");
// detect an type error
Type bt = Types.getBaseClass(getClass(), Descriptor.class);
if (bt instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) bt;
// this 't' is the closest approximation of T of Descriptor<T>.
Class t = Types.erasure(pt.getActualTypeArguments()[0]);
if(!t.isAssignableFrom(clazz))
throw new AssertionError("Outer class "+clazz+" of "+getClass()+" is not assignable to "+t+". Perhaps wrong outer class?");
}
// detect a type error. this Descriptor is supposed to be returned from getDescriptor(), so make sure its type match up.
// this prevents a bug like http://www.nabble.com/Creating-a-new-parameter-Type-%3A-Masked-Parameter-td24786554.html
try {
Method getd = clazz.getMethod("getDescriptor");
if(!getd.getReturnType().isAssignableFrom(getClass())) {
throw new AssertionError(getClass()+" must be assignable to "+getd.getReturnType());
}
} catch (NoSuchMethodException e) {
throw new AssertionError(getClass()+" is missing getDescriptor method.");
}
}
/**
* Human readable name of this kind of configurable object.
*/
public abstract String getDisplayName();
/**
* Uniquely identifies this {@link Descriptor} among all the other {@link Descriptor}s.
*
* <p>
* Historically {@link #clazz} is assumed to be unique, so this method uses that as the default,
* but if you are adding {@link Descriptor}s programmatically for the same type, you can change
* this to disambiguate them.
*
* @return
* Stick to valid Java identifier character, plus '.', which had to be allowed for historical reasons.
*
* @since 1.391
*/
public String getId() {
return clazz.getName();
}
/**
* Gets the URL that this Descriptor is bound to, relative to the nearest {@link DescriptorByNameOwner}.
* Since {@link Hudson} is a {@link DescriptorByNameOwner}, there's always one such ancestor to any request.
*/
public String getDescriptorUrl() {
return "descriptorByName/"+getId();
}
private String getCurrentDescriptorByNameUrl() {
StaplerRequest req = Stapler.getCurrentRequest();
Ancestor a = req.findAncestor(DescriptorByNameOwner.class);
return a.getUrl();
}
/**
* If the field "xyz" of a {@link Describable} has the corresponding "doCheckXyz" method,
* return the form-field validation string. Otherwise null.
* <p>
* This method is used to hook up the form validation method to the corresponding HTML input element.
*/
public String getCheckUrl(String fieldName) {
String method = checkMethods.get(fieldName);
if(method==null) {
method = calcCheckUrl(fieldName);
checkMethods.put(fieldName,method);
}
if (method.equals(NONE)) // == would do, but it makes IDE flag a warning
return null;
// put this under the right contextual umbrella.
// a is always non-null because we already have Hudson as the sentinel
return singleQuote(getCurrentDescriptorByNameUrl()+'/')+'+'+method;
}
private String calcCheckUrl(String fieldName) {
String capitalizedFieldName = StringUtils.capitalize(fieldName);
Method method = ReflectionUtils.getPublicMethodNamed(getClass(),"doCheck"+ capitalizedFieldName);
if(method==null)
return NONE;
return singleQuote(getDescriptorUrl() +"/check"+capitalizedFieldName) + buildParameterList(method, new StringBuilder()).append(".toString()");
}
/**
* Builds query parameter line by figuring out what should be submitted
*/
private StringBuilder buildParameterList(Method method, StringBuilder query) {
for (Parameter p : ReflectionUtils.getParameters(method)) {
QueryParameter qp = p.annotation(QueryParameter.class);
if (qp!=null) {
String name = qp.value();
if (name.length()==0) name = p.name();
if (name==null || name.length()==0)
continue; // unknown parameter name. we'll report the error when the form is submitted.
RelativePath rp = p.annotation(RelativePath.class);
if (rp!=null)
name = rp.value()+'/'+name;
if (query.length()==0) query.append("+qs(this)");
if (name.equals("value")) {
// The special 'value' parameter binds to the the current field
query.append(".addThis()");
} else {
query.append(".nearBy('"+name+"')");
}
continue;
}
Method m = ReflectionUtils.getPublicMethodNamed(p.type(), "fromStapler");
if (m!=null) buildParameterList(m,query);
}
return query;
}
/**
* Computes the list of other form fields that the given field depends on, via the doFillXyzItems method,
* and sets that as the 'fillDependsOn' attribute. Also computes the URL of the doFillXyzItems and
* sets that as the 'fillUrl' attribute.
*/
public void calcFillSettings(String field, Map<String,Object> attributes) {
String capitalizedFieldName = StringUtils.capitalize(field);
String methodName = "doFill" + capitalizedFieldName + "Items";
Method method = ReflectionUtils.getPublicMethodNamed(getClass(), methodName);
if(method==null)
throw new IllegalStateException(String.format("%s doesn't have the %s method for filling a drop-down list", getClass(), methodName));
// build query parameter line by figuring out what should be submitted
List<String> depends = buildFillDependencies(method, new ArrayList<String>());
if (!depends.isEmpty())
attributes.put("fillDependsOn",Util.join(depends," "));
attributes.put("fillUrl", String.format("%s/%s/fill%sItems", getCurrentDescriptorByNameUrl(), getDescriptorUrl(), capitalizedFieldName));
}
private List<String> buildFillDependencies(Method method, List<String> depends) {
for (Parameter p : ReflectionUtils.getParameters(method)) {
QueryParameter qp = p.annotation(QueryParameter.class);
if (qp!=null) {
String name = qp.value();
if (name.length()==0) name = p.name();
if (name==null || name.length()==0)
continue; // unknown parameter name. we'll report the error when the form is submitted.
RelativePath rp = p.annotation(RelativePath.class);
if (rp!=null)
name = rp.value()+'/'+name;
depends.add(name);
continue;
}
Method m = ReflectionUtils.getPublicMethodNamed(p.type(), "fromStapler");
if (m!=null)
buildFillDependencies(m,depends);
}
return depends;
}
/**
* Computes the auto-completion setting
*/
public void calcAutoCompleteSettings(String field, Map<String,Object> attributes) {
String capitalizedFieldName = StringUtils.capitalize(field);
String methodName = "doAutoComplete" + capitalizedFieldName;
Method method = ReflectionUtils.getPublicMethodNamed(getClass(), methodName);
if(method==null)
return; // no auto-completion
attributes.put("autoCompleteUrl", String.format("%s/%s/autoComplete%s", getCurrentDescriptorByNameUrl(), getDescriptorUrl(), capitalizedFieldName));
}
/**
* Used by Jelly to abstract away the handlign of global.jelly vs config.jelly databinding difference.
*/
public PropertyType getPropertyType(Object instance, String field) {
// in global.jelly, instance==descriptor
return instance==this ? getGlobalPropertyType(field) : getPropertyType(field);
}
/**
* Obtains the property type of the given field of {@link #clazz}
*/
public PropertyType getPropertyType(String field) {
if(propertyTypes==null)
propertyTypes = buildPropertyTypes(clazz);
return propertyTypes.get(field);
}
/**
* Obtains the property type of the given field of this descriptor.
*/
public PropertyType getGlobalPropertyType(String field) {
if(globalPropertyTypes==null)
globalPropertyTypes = buildPropertyTypes(getClass());
return globalPropertyTypes.get(field);
}
/**
* Given the class, list up its {@link PropertyType}s from its public fields/getters.
*/
private Map<String, PropertyType> buildPropertyTypes(Class<?> clazz) {
Map<String, PropertyType> r = new HashMap<String, PropertyType>();
for (Field f : clazz.getFields())
r.put(f.getName(),new PropertyType(f));
for (Method m : clazz.getMethods())
if(m.getName().startsWith("get"))
r.put(Introspector.decapitalize(m.getName().substring(3)),new PropertyType(m));
return r;
}
/**
* Gets the class name nicely escaped to be usable as a key in the structured form submission.
*/
public final String getJsonSafeClassName() {
return getId().replace('.','-');
}
/**
* @deprecated
* Implement {@link #newInstance(StaplerRequest, JSONObject)} method instead.
* Deprecated as of 1.145.
*/
public T newInstance(StaplerRequest req) throws FormException {
throw new UnsupportedOperationException(getClass()+" should implement newInstance(StaplerRequest,JSONObject)");
}
/**
* Creates a configured instance from the submitted form.
*
* <p>
* Hudson only invokes this method when the user wants an instance of <tt>T</tt>.
* So there's no need to check that in the implementation.
*
* <p>
* Starting 1.206, the default implementation of this method does the following:
* <pre>
* req.bindJSON(clazz,formData);
* </pre>
* <p>
* ... which performs the databinding on the constructor of {@link #clazz}.
*
* <p>
* For some types of {@link Describable}, such as {@link ListViewColumn}, this method
* can be invoked with null request object for historical reason. Such design is considered
* broken, but due to the compatibility reasons we cannot fix it. Because of this, the
* default implementation gracefully handles null request, but the contract of the method
* still is "request is always non-null." Extension points that need to define the "default instance"
* semantics should define a descriptor subtype and add the no-arg newInstance method.
*
* @param req
* Always non-null (see note above.) This object includes represents the entire submission.
* @param formData
* The JSON object that captures the configuration data for this {@link Descriptor}.
* See http://wiki.hudson-ci.org/display/HUDSON/Structured+Form+Submission
* Always non-null.
*
* @throws FormException
* Signals a problem in the submitted form.
* @since 1.145
*/
public T newInstance(StaplerRequest req, JSONObject formData) throws FormException {
try {
Method m = getClass().getMethod("newInstance", StaplerRequest.class);
if(!Modifier.isAbstract(m.getDeclaringClass().getModifiers())) {
// this class overrides newInstance(StaplerRequest).
// maintain the backward compatible behavior
return verifyNewInstance(newInstance(req));
} else {
if (req==null) {
// yes, req is supposed to be always non-null, but see the note above
return verifyNewInstance(clazz.newInstance());
}
// new behavior as of 1.206
return verifyNewInstance(req.bindJSON(clazz,formData));
}
} catch (NoSuchMethodException e) {
throw new AssertionError(e); // impossible
} catch (InstantiationException e) {
throw new Error("Failed to instantiate "+clazz+" from "+formData,e);
} catch (IllegalAccessException e) {
throw new Error("Failed to instantiate "+clazz+" from "+formData,e);
} catch (RuntimeException e) {
throw new RuntimeException("Failed to instantiate "+clazz+" from "+formData,e);
}
}
/**
* Look out for a typical error a plugin developer makes.
* See http://hudson.361315.n4.nabble.com/Help-Hint-needed-Post-build-action-doesn-t-stay-activated-td2308833.html
*/
private T verifyNewInstance(T t) {
if (t!=null && t.getDescriptor()!=this) {
// TODO: should this be a fatal error?
LOGGER.warning("Father of "+ t+" and its getDescriptor() points to two different instances. Probably malplaced @Extension. See http://hudson.361315.n4.nabble.com/Help-Hint-needed-Post-build-action-doesn-t-stay-activated-td2308833.html");
}
return t;
}
/**
* Returns the resource path to the help screen HTML, if any.
*
* <p>
* Starting 1.282, this method uses "convention over configuration" — you should
* just put the "help.html" (and its localized versions, if any) in the same directory
* you put your Jelly view files, and this method will automatically does the right thing.
*
* <p>
* This value is relative to the context root of Hudson, so normally
* the values are something like <tt>"/plugin/emma/help.html"</tt> to
* refer to static resource files in a plugin, or <tt>"/publisher/EmmaPublisher/abc"</tt>
* to refer to Jelly script <tt>abc.jelly</tt> or a method <tt>EmmaPublisher.doAbc()</tt>.
*
* @return
* null to indicate that there's no help.
*/
public String getHelpFile() {
return getHelpFile(null);
}
/**
* Returns the path to the help screen HTML for the given field.
*
* <p>
* The help files are assumed to be at "help/FIELDNAME.html" with possible
* locale variations.
*/
public String getHelpFile(final String fieldName) {
for(Class c=clazz; c!=null; c=c.getSuperclass()) {
String page = "/descriptor/" + getId() + "/help";
String suffix;
if(fieldName==null) {
suffix="";
} else {
page += '/'+fieldName;
suffix='-'+fieldName;
}
try {
if(Stapler.getCurrentRequest().getView(c,"help"+suffix)!=null)
return page;
} catch (IOException e) {
throw new Error(e);
}
InputStream in = getHelpStream(c,suffix);
IOUtils.closeQuietly(in);
if(in!=null) return page;
}
return null;
}
/**
* Checks if the given object is created from this {@link Descriptor}.
*/
public final boolean isInstance( T instance ) {
return clazz.isInstance(instance);
}
/**
* Checks if the type represented by this descriptor is a subtype of the given type.
*/
public final boolean isSubTypeOf(Class type) {
return type.isAssignableFrom(clazz);
}
/**
* @deprecated
* As of 1.239, use {@link #configure(StaplerRequest, JSONObject)}.
*/
public boolean configure( StaplerRequest req ) throws FormException {
return true;
}
/**
* Invoked when the global configuration page is submitted.
*
* Can be overriden to store descriptor-specific information.
*
* @param json
* The JSON object that captures the configuration data for this {@link Descriptor}.
* See http://wiki.hudson-ci.org/display/HUDSON/Structured+Form+Submission
* @return false
* to keep the client in the same config page.
*/
public boolean configure( StaplerRequest req, JSONObject json ) throws FormException {
// compatibility
return configure(req);
}
public String getConfigPage() {
return getViewPage(clazz, "config.jelly");
}
public String getGlobalConfigPage() {
return getViewPage(clazz, "global.jelly",null);
}
private String getViewPage(Class<?> clazz, String pageName, String defaultValue) {
while(clazz!=Object.class) {
String name = clazz.getName().replace('.', '/').replace('$', '/') + "/" + pageName;
if(clazz.getClassLoader().getResource(name)!=null)
return '/'+name;
clazz = clazz.getSuperclass();
}
return defaultValue;
}
protected final String getViewPage(Class<?> clazz, String pageName) {
// We didn't find the configuration page.
// Either this is non-fatal, in which case it doesn't matter what string we return so long as
// it doesn't exist.
// Or this error is fatal, in which case we want the developer to see what page he's missing.
// so we put the page name.
return getViewPage(clazz,pageName,pageName);
}
/**
* Saves the configuration info to the disk.
*/
public synchronized void save() {
if(BulkChange.contains(this)) return;
try {
getConfigFile().write(this);
SaveableListener.fireOnChange(this, getConfigFile());
} catch (IOException e) {
LOGGER.log(Level.WARNING, "Failed to save "+getConfigFile(),e);
}
}
/**
* Loads the data from the disk into this object.
*
* <p>
* The constructor of the derived class must call this method.
* (If we do that in the base class, the derived class won't
* get a chance to set default values.)
*/
public synchronized void load() {
XmlFile file = getConfigFile();
if(!file.exists())
return;
try {
file.unmarshal(this);
} catch (IOException e) {
LOGGER.log(Level.WARNING, "Failed to load "+file, e);
}
}
public XmlFile getConfigFile() {
return new XmlFile(new File(Hudson.getInstance().getRootDir(),getId()+".xml"));
}
/**
* Serves <tt>help.html</tt> from the resource of {@link #clazz}.
*/
public void doHelp(StaplerRequest req, StaplerResponse rsp) throws IOException, ServletException {
String path = req.getRestOfPath();
if(path.contains("..")) throw new ServletException("Illegal path: "+path);
path = path.replace('/','-');
for (Class c=clazz; c!=null; c=c.getSuperclass()) {
RequestDispatcher rd = Stapler.getCurrentRequest().getView(c, "help"+path);
if(rd!=null) {// Jelly-generated help page
rd.forward(req,rsp);
return;
}
InputStream in = getHelpStream(c,path);
if(in!=null) {
// TODO: generalize macro expansion and perhaps even support JEXL
rsp.setContentType("text/html;charset=UTF-8");
String literal = IOUtils.toString(in,"UTF-8");
rsp.getWriter().println(Util.replaceMacro(literal, Collections.singletonMap("rootURL",req.getContextPath())));
in.close();
return;
}
}
rsp.sendError(SC_NOT_FOUND);
}
private InputStream getHelpStream(Class c, String suffix) {
Locale locale = Stapler.getCurrentRequest().getLocale();
String base = c.getName().replace('.', '/').replace('$','/') + "/help"+suffix;
ClassLoader cl = c.getClassLoader();
if(cl==null) return null;
InputStream in;
in = cl.getResourceAsStream(base + '_' + locale.getLanguage() + '_' + locale.getCountry() + '_' + locale.getVariant() + ".html");
if(in!=null) return in;
in = cl.getResourceAsStream(base + '_' + locale.getLanguage() + '_' + locale.getCountry() + ".html");
if(in!=null) return in;
in = cl.getResourceAsStream(base + '_' + locale.getLanguage() + ".html");
if(in!=null) return in;
// default
return cl.getResourceAsStream(base+".html");
}
//
// static methods
//
// to work around warning when creating a generic array type
public static <T> T[] toArray( T... values ) {
return values;
}
public static <T> List<T> toList( T... values ) {
return new ArrayList<T>(Arrays.asList(values));
}
public static <T extends Describable<T>>
Map<Descriptor<T>,T> toMap(Iterable<T> describables) {
Map<Descriptor<T>,T> m = new LinkedHashMap<Descriptor<T>,T>();
if (null != describables) {
for (T d : describables) {
m.put(d.getDescriptor(), d);
}
}
return m;
}
/**
* Used to build {@link Describable} instance list from <f:hetero-list> tag.
*
* @param req
* Request that represents the form submission.
* @param formData
* Structured form data that represents the contains data for the list of describables.
* @param key
* The JSON property name for 'formData' that represents the data for the list of describables.
* @param descriptors
* List of descriptors to create instances from.
* @return
* Can be empty but never null.
*/
public static <T extends Describable<T>>
List<T> newInstancesFromHeteroList(StaplerRequest req, JSONObject formData, String key,
Collection<? extends Descriptor<T>> descriptors) throws FormException {
return newInstancesFromHeteroList(req,formData.get(key),descriptors);
}
public static <T extends Describable<T>>
List<T> newInstancesFromHeteroList(StaplerRequest req, Object formData,
Collection<? extends Descriptor<T>> descriptors) throws FormException {
List<T> items = new ArrayList<T>();
if (formData!=null) {
for (Object o : JSONArray.fromObject(formData)) {
JSONObject jo = (JSONObject)o;
String kind = jo.getString("kind");
items.add(find(descriptors,kind).newInstance(req,jo));
}
}
return items;
}
/**
* Finds a descriptor from a collection by its class name.
*/
public static <T extends Descriptor> T find(Collection<? extends T> list, String className) {
for (T d : list) {
if(d.getClass().getName().equals(className))
return d;
}
return null;
}
public static Descriptor find(String className) {
return find(Hudson.getInstance().getExtensionList(Descriptor.class),className);
}
public static final class FormException extends Exception implements HttpResponse {
private final String formField;
public FormException(String message, String formField) {
super(message);
this.formField = formField;
}
public FormException(String message, Throwable cause, String formField) {
super(message, cause);
this.formField = formField;
}
public FormException(Throwable cause, String formField) {
super(cause);
this.formField = formField;
}
/**
* Which form field contained an error?
*/
public String getFormField() {
return formField;
}
public void generateResponse(StaplerRequest req, StaplerResponse rsp, Object node) throws IOException, ServletException {
// for now, we can't really use the field name that caused the problem.
new Failure(getMessage()).generateResponse(req,rsp,node);
}
}
private static final Logger LOGGER = Logger.getLogger(Descriptor.class.getName());
/**
* Used in {@link #checkMethods} to indicate that there's no check method.
*/
private static final String NONE = "\u0000";
private Object readResolve() {
if (properties!=null)
OldDataMonitor.report(this, "1.62");
return this;
}
}