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/*******************************************************************************
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* Copyright (c) 2009, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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******************************************************************************/
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package org.eclipse.ui.internal.navigator;
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import java.util.Iterator;
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import java.util.LinkedHashSet;
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import org.eclipse.ui.navigator.INavigatorContentDescriptor;
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/**
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* Used to associate the NavigatorContentDescriptor (NCD) with an object that it contributes.
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*
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* The NCD/object association is tracked using the NavigatorContentService.rememberContribution().
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*
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* @since 3.2
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*
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*/
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public class ContributorTrackingSet extends LinkedHashSet {
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private static final long serialVersionUID = 2516241537206281972L;
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private INavigatorContentDescriptor contributor;
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private INavigatorContentDescriptor firstClassContributor;
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private NavigatorContentService contentService;
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/**
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* Construct a tracking set.
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*
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* @param aContentService
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*/
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public ContributorTrackingSet(NavigatorContentService aContentService) {
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contentService = aContentService;
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}
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/**
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* Construct a tracking set.
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*
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* @param aContentService
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* @param elements
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*/
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public ContributorTrackingSet(NavigatorContentService aContentService, Object[] elements) {
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for (int i = 0; i < elements.length; i++)
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super.add(elements[i]);
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contentService = aContentService;
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}
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public boolean add(Object o) {
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if (contributor != null) {
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contentService.rememberContribution(contributor, firstClassContributor, o);
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}
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return super.add(o);
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}
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public boolean remove(Object o) {
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contentService.forgetContribution(o);
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return super.remove(o);
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}
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public void clear() {
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Iterator it = iterator();
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while (it.hasNext())
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contentService.forgetContribution(it.next());
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super.clear();
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}
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/**
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*
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* @return The current contributor.
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*/
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public INavigatorContentDescriptor getContributor() {
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return contributor;
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}
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/**
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*
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* @return The current contributor.
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*/
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public INavigatorContentDescriptor getFirstClassContributor() {
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return firstClassContributor;
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}
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/**
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*
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* @param newContributor The contributor to record for the next series of adds.
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* @param theFirstClassContributor The first class contributor associated with the newContributor.
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*/
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public void setContributor(INavigatorContentDescriptor newContributor, INavigatorContentDescriptor theFirstClassContributor) {
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contributor = newContributor;
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firstClassContributor = theFirstClassContributor;
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}
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/**
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* @param contents
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*/
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public void setContents(Object[] contents) {
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super.clear();
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if(contents != null)
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for (int i = 0; i < contents.length; i++)
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add(contents[i]);
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}
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public Iterator iterator() {
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return new Iterator() {
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Iterator delegateIterator = ContributorTrackingSet.super.iterator();
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Object current;
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public boolean hasNext() {
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return delegateIterator.hasNext();
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}
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public Object next() {
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current = delegateIterator.next();
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return current;
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}
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public void remove() {
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delegateIterator.remove();
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contentService.forgetContribution(current);
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}
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};
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}
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}
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