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/*******************************************************************************
* Copyright (c) 2000, 2005 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
*******************************************************************************/
package org.eclipse.team.examples.pessimistic;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
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<IResource, Set<IResource>> fResourceTree;
private IResource[] fRoots;
public ResourceSetContentProvider(Set<IResource> resources) {
fResourceTree = new HashMap<>(1);
Set<IResource> roots= new HashSet<>(resources);
for (Object element : resources) {
IResource resource= (IResource)element;
if(resource.getType() == IResource.ROOT) {
continue; // root cannot be displayed
}
IResource parent= resource.getParent();
if (roots.contains(parent)) {
roots.remove(resource);
Set<IResource> set= fResourceTree.get(parent);
if (set == null) {
set= new HashSet<>(1);
fResourceTree.put(parent, set);
}
set.add(resource);
}
}
fRoots= roots.toArray(new IResource[roots.size()]);
}
@Override
public Object[] getChildren(Object parentElement) {
Set<IResource> set= fResourceTree.get(parentElement);
if (set != null) {
return set.toArray();
}
return EMPTY_ARRAY;
}
@Override
public Object getParent(Object element) {
if (element instanceof IResource) {
return ((IResource)element).getParent();
}
return null;
}
@Override
public boolean hasChildren(Object element) {
return fResourceTree.get(element) != null;
}
@Override
public Object[] getElements(Object inputElement) {
return fRoots;
}
@Override
public void dispose() {
fResourceTree= null;
}
@Override
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}
}
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