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/*******************************************************************************
* Copyright (c) 2006, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Brad Reynolds - bug 164653
* Matthew Hall - bugs 118516, 146397, 249526
*******************************************************************************/
package org.eclipse.core.databinding.observable;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.AssertionFailedException;
/**
* @since 1.0
*/
public abstract class AbstractObservable extends ChangeManager implements IObservable {
private boolean disposed = false;
/**
* @param realm
*/
public AbstractObservable(Realm realm) {
super(realm);
ObservableTracker.observableCreated(this);
}
@Override
public synchronized void addChangeListener(IChangeListener listener) {
addListener(ChangeEvent.TYPE, listener);
}
@Override
public synchronized void removeChangeListener(IChangeListener listener) {
removeListener(ChangeEvent.TYPE, listener);
}
@Override
public synchronized void addStaleListener(IStaleListener listener) {
addListener(StaleEvent.TYPE, listener);
}
@Override
public synchronized void removeStaleListener(IStaleListener listener) {
removeListener(StaleEvent.TYPE, listener);
}
/**
* @since 1.2
*/
@Override
public synchronized void addDisposeListener(IDisposeListener listener) {
addListener(DisposeEvent.TYPE, listener);
}
/**
* @since 1.2
*/
@Override
public synchronized void removeDisposeListener(IDisposeListener listener) {
removeListener(DisposeEvent.TYPE, listener);
}
protected void fireChange() {
checkRealm();
fireEvent(new ChangeEvent(this));
}
protected void fireStale() {
checkRealm();
fireEvent(new StaleEvent(this));
}
/**
* @since 1.2
*/
@Override
public synchronized boolean isDisposed() {
return disposed;
}
/**
*
*/
@Override
public synchronized void dispose() {
if (!disposed) {
disposed = true;
fireEvent(new DisposeEvent(this));
super.dispose();
}
}
/**
* Asserts that the realm is the current realm.
*
* @see Realm#isCurrent()
* @throws AssertionFailedException if the realm is not the current realm
*/
protected void checkRealm() {
Assert.isTrue(getRealm().isCurrent(),
"This operation must be run within the observable's realm"); //$NON-NLS-1$
}
}
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