/*******************************************************************************
* Copyright (c) 2006 Cerner Corporation and others.
* 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:
* Brad Reynolds - initial API and implementation
******************************************************************************/
package org.eclipse.core.internal.databinding.observable;
import org.eclipse.core.databinding.observable.IStaleListener;
import org.eclipse.core.databinding.observable.StaleEvent;
import org.eclipse.core.databinding.observable.list.IListChangeListener;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.list.ListChangeEvent;
import org.eclipse.core.databinding.observable.list.ObservableList;
/**
* ObservableList implementation that prevents modification by consumers. Events
* in the originating wrapped list are propagated and thrown from this instance
* when appropriate. All mutators throw an UnsupportedOperationException.
*
* @since 3.2
*/
/*
* Implementation makes the assumption that the superclass (UnmodifiableList) is
* unmodifiable and that all modify methods throw an
* UnsupportedOperationException.
*/
public class UnmodifiableObservableList extends ObservableList {
/**
* List that is being made unmodifiable.
*/
private final IObservableList wrappedList;
/**
* @param wrappedList
*/
public UnmodifiableObservableList(IObservableList wrappedList) {
super(wrappedList.getRealm(), wrappedList, wrappedList.getElementType());
this.wrappedList = wrappedList;
wrappedList.addListChangeListener(new IListChangeListener() {
public void handleListChange(ListChangeEvent event) {
// Fires a Change and then ListChange event.
fireListChange(event.diff);
}
});
wrappedList.addStaleListener(new IStaleListener() {
public void handleStale(StaleEvent event) {
fireStale();
}
});
}
/**
* Because this instance is immutable staleness cannot be changed.
*
*/
public void setStale(boolean stale) {
throw new UnsupportedOperationException();
}
public boolean isStale() {
return wrappedList.isStale();
}
}