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/*******************************************************************************
* Copyright (c) 2000, 2005 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.team.examples.pessimistic;
import java.util.*;
import org.eclipse.core.resources.IResource;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
public class ResourceSetContentProvider implements ITreeContentProvider {
private static final Object[] EMPTY_ARRAY= new Object[0];
private Map fResourceTree;
private IResource[] fRoots;
public ResourceSetContentProvider(Set resources) {
fResourceTree= new HashMap(1);
Set roots= new HashSet(resources);
for(Iterator i= resources.iterator(); i.hasNext(); ) {
IResource resource= (IResource)i.next();
if(resource.getType() == IResource.ROOT) {
continue; // root cannot be displayed
}
IResource parent= resource.getParent();
if (roots.contains(parent)) {
roots.remove(resource);
Set set= (Set)fResourceTree.get(parent);
if (set == null) {
set= new HashSet(1);
fResourceTree.put(parent, set);
}
set.add(resource);
}
}
fRoots= (IResource[])roots.toArray(new IResource[roots.size()]);
}
public Object[] getChildren(Object parentElement) {
Set set= (Set) fResourceTree.get(parentElement);
if (set != null) {
return set.toArray();
}
return EMPTY_ARRAY;
}
public Object getParent(Object element) {
if (element instanceof IResource) {
return ((IResource)element).getParent();
}
return null;
}
public boolean hasChildren(Object element) {
return fResourceTree.get(element) != null;
}
public Object[] getElements(Object inputElement) {
return fRoots;
}
public void dispose() {
fResourceTree= null;
}
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}
}
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