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/*******************************************************************************
* Copyright (c) 2004, 2008 IBM 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.core.internal.registry;
import org.eclipse.core.runtime.InvalidRegistryObjectException;
/**
* A handle is the super class to all registry objects that are now served to users.
* The handles never hold on to any "real" content of the object being represented.
* A handle can become stale if its referenced object has been removed from the registry.
* @since 3.1.
*/
public abstract class Handle {
protected IObjectManager objectManager;
private int objectId;
public int getId() {
return objectId;
}
Handle(IObjectManager objectManager, int value) {
objectId = value;
this.objectManager = objectManager;
}
/**
* Return the actual object corresponding to this handle.
* @throws InvalidRegistryObjectException when the handle is stale.
*/
abstract RegistryObject getObject();
@Override
public boolean equals(Object object) {
if (object instanceof Handle) {
return objectId == ((Handle) object).objectId;
}
return false;
}
@Override
public int hashCode() {
return objectId;
}
}
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