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/*******************************************************************************
* Copyright (c) 2004 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;
// This object is used to keep track on a contributor basis of the extension and extension points being contributed.
// It is mainly used on removal so we can quickly find objects to remove.
// Each contribution is made in the context of a namespace.
public class Contribution implements KeyedElement {
static final int[] EMPTY_CHILDREN = new int[] {0, 0};
//The registry that owns this object
protected ExtensionRegistry registry;
// The actual contributor of the contribution.
protected long contributorId;
// The namespace containing this contribution.
protected String namespace = null;
// Id of the namespace owner (might be same or different from the contributorId).
protected long namespaceOwnerId = -1;
// This array stores the identifiers of both the extension points and the extensions.
// The array has always a minimum size of 2.
// The first element of the array is the number of extension points and the second the number of extensions.
// [numberOfExtensionPoints, numberOfExtensions, extensionPoint#1, extensionPoint#2, extensionPoint..., ext#1, ext#2, ext#3, ... ].
// The size of the array is 2 + (numberOfExtensionPoints + numberOfExtensions).
private int[] children = EMPTY_CHILDREN;
static final public byte EXTENSION_POINT = 0;
static final public byte EXTENSION = 1;
protected Contribution(long contributorId, ExtensionRegistry registry) {
this.contributorId = contributorId;
this.registry = registry;
// resolve namespace owner and namespace
namespaceOwnerId = registry.getNamespaceOwnerId(contributorId);
namespace = registry.getNamespace(contributorId);
}
void setRawChildren(int[] children) {
this.children = children;
}
protected long getContributorId() {
return contributorId;
}
protected int[] getRawChildren() {
return children;
}
protected int[] getExtensions() {
int[] results = new int[children[EXTENSION]];
System.arraycopy(children, 2 + children[EXTENSION_POINT], results, 0, children[EXTENSION]);
return results;
}
protected int[] getExtensionPoints() {
int[] results = new int[children[EXTENSION_POINT]];
System.arraycopy(children, 2, results, 0, children[EXTENSION_POINT]);
return results;
}
public String getNamespace() {
return namespace;
}
public String toString() {
return "Contribution: " + contributorId + " in namespace" + getNamespace(); //$NON-NLS-1$ //$NON-NLS-2$
}
protected long getNamespaceOwnerId() {
return namespaceOwnerId;
}
//Implements the KeyedElement interface
public int getKeyHashCode() {
return getKey().hashCode();
}
public Object getKey() {
return new Long(contributorId);
}
public boolean compare(KeyedElement other) {
return contributorId == ((Contribution) other).contributorId;
}
}
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