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/*******************************************************************************
* Copyright (c) 2007, 2010 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.model.listener;
import java.lang.reflect.Method;
import org.eclipse.jpt.common.utility.internal.ReflectionTools;
import org.eclipse.jpt.common.utility.model.event.CollectionAddEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionChangeEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionClearEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionRemoveEvent;
import org.eclipse.jpt.common.utility.model.event.ListAddEvent;
import org.eclipse.jpt.common.utility.model.event.ListChangeEvent;
import org.eclipse.jpt.common.utility.model.event.ListClearEvent;
import org.eclipse.jpt.common.utility.model.event.ListEvent;
import org.eclipse.jpt.common.utility.model.event.ListMoveEvent;
import org.eclipse.jpt.common.utility.model.event.ListRemoveEvent;
import org.eclipse.jpt.common.utility.model.event.ListReplaceEvent;
import org.eclipse.jpt.common.utility.model.event.TreeAddEvent;
import org.eclipse.jpt.common.utility.model.event.TreeChangeEvent;
import org.eclipse.jpt.common.utility.model.event.TreeClearEvent;
import org.eclipse.jpt.common.utility.model.event.TreeEvent;
import org.eclipse.jpt.common.utility.model.event.TreeRemoveEvent;
/**
* This class is used by {@link ReflectiveChangeListener} when the requested listener
* needs to implement multiple methods (i.e. {@link CollectionChangeListener},
* {@link ListChangeListener}, or {@link TreeChangeListener}).
*/
class MultiMethodReflectiveChangeListener
extends ReflectiveChangeListener
implements CollectionChangeListener, ListChangeListener, TreeChangeListener
{
/** the methods we will invoke on the target object */
private final Method addMethod;
private final Method removeMethod;
private final Method replaceMethod; // this can be null
private final Method moveMethod; // this can be null
private final Method clearMethod;
private final Method changeMethod;
/**
* The "replace" and "move" methods are optional.
*/
MultiMethodReflectiveChangeListener(Object target, Method addMethod, Method removeMethod, Method replaceMethod, Method moveMethod, Method clearMethod, Method changeMethod) {
super(target);
this.addMethod = addMethod;
this.removeMethod = removeMethod;
this.replaceMethod = replaceMethod;
this.moveMethod = moveMethod;
this.clearMethod = clearMethod;
this.changeMethod = changeMethod;
}
/**
* No "replace" or "move" methods.
*/
MultiMethodReflectiveChangeListener(Object target, Method addMethod, Method removeMethod, Method clearMethod, Method changeMethod) {
this(target, addMethod, removeMethod, null, null, clearMethod, changeMethod);
}
// ********** CollectionChangeListener implementation **********
private void invoke(Method method, CollectionEvent event) {
if (method.getParameterTypes().length == 0) {
ReflectionTools.executeMethod(method, this.target, EMPTY_OBJECT_ARRAY);
} else {
ReflectionTools.executeMethod(method, this.target, new CollectionEvent[] {event});
}
}
public void itemsAdded(CollectionAddEvent event) {
this.invoke(this.addMethod, event);
}
public void itemsRemoved(CollectionRemoveEvent event) {
this.invoke(this.removeMethod, event);
}
public void collectionCleared(CollectionClearEvent event) {
this.invoke(this.clearMethod, event);
}
public void collectionChanged(CollectionChangeEvent event) {
this.invoke(this.changeMethod, event);
}
// ********** ListChangeListener implementation **********
private void invoke(Method method, ListEvent event) {
if (method.getParameterTypes().length == 0) {
ReflectionTools.executeMethod(method, this.target, EMPTY_OBJECT_ARRAY);
} else {
ReflectionTools.executeMethod(method, this.target, new ListEvent[] {event});
}
}
public void itemsAdded(ListAddEvent event) {
this.invoke(this.addMethod, event);
}
public void itemsRemoved(ListRemoveEvent event) {
this.invoke(this.removeMethod, event);
}
public void itemsReplaced(ListReplaceEvent event) {
this.invoke(this.replaceMethod, event);
}
public void itemsMoved(ListMoveEvent event) {
this.invoke(this.moveMethod, event);
}
public void listCleared(ListClearEvent event) {
this.invoke(this.clearMethod, event);
}
public void listChanged(ListChangeEvent event) {
this.invoke(this.changeMethod, event);
}
// ********** TreeChangeListener implementation **********
private void invoke(Method method, TreeEvent event) {
if (method.getParameterTypes().length == 0) {
ReflectionTools.executeMethod(method, this.target, EMPTY_OBJECT_ARRAY);
} else {
ReflectionTools.executeMethod(method, this.target, new TreeEvent[] {event});
}
}
public void nodeAdded(TreeAddEvent event) {
this.invoke(this.addMethod, event);
}
public void nodeRemoved(TreeRemoveEvent event) {
this.invoke(this.removeMethod, event);
}
public void treeCleared(TreeClearEvent event) {
this.invoke(this.clearMethod, event);
}
public void treeChanged(TreeChangeEvent event) {
this.invoke(this.changeMethod, event);
}
}
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