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/*****************************************************************************
* Copyright (c) 2012 CEA LIST.
*
* 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.widgets.providers;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.papyrus.infra.tools.util.ListHelper;
import org.eclipse.papyrus.infra.widgets.Activator;
import com.ibm.icu.text.Collator;
/**
* A ContentProvider for resources located in the current workspace
*
* @author Camille Letavernier
*/
public class SemanticWorkspaceContentProvider extends AbstractStaticContentProvider implements IHierarchicContentProvider {
/**
* Constructor
*/
public SemanticWorkspaceContentProvider() {
}
/**
* {@inheritDoc}
*/
@Override
public Object[] getElements() {
try {
return filterAccessibleElements(ResourcesPlugin.getWorkspace().getRoot().members());
} catch (Exception ex) {
Activator.log.error(ex);
return new Object[0];
}
}
protected Object[] filterAccessibleElements(IResource[] members) {
List<IResource> accessibleElements = ListHelper.asList(members);
Iterator<IResource> resourceIterator = accessibleElements.iterator();
while (resourceIterator.hasNext()) {
IResource resource = resourceIterator.next();
if (!resource.isAccessible()) {
resourceIterator.remove();
}
}
Collections.sort(accessibleElements, resourceComparator);
return accessibleElements.toArray();
}
/**
* {@inheritDoc}
*/
@Override
public Object[] getChildren(Object parentElement) {
if (parentElement instanceof IContainer) {
try {
IResource[] members = ((IContainer) parentElement).members();
return filterAccessibleElements(members);
} catch (CoreException ex) {
Activator.log.error(ex);
}
}
return new Object[0];
}
/**
* {@inheritDoc}
*/
@Override
public Object getParent(Object element) {
if (element instanceof IContainer) {
return ((IContainer) element).getParent();
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
public boolean hasChildren(Object element) {
return getChildren(element).length > 0;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isValidValue(Object element) {
return !(element instanceof IWorkspaceRoot);
}
/**
* Compares two resources (IResource)
*/
private static final Comparator<IResource> resourceComparator = createComparator();
private static Comparator<IResource> createComparator() {
final int folderTypes = IResource.FOLDER | IResource.PROJECT | IResource.ROOT;
return new Comparator<IResource>() {
@Override
public int compare(IResource resource1, IResource resource2) {
int typeCompare = compareType(resource1, resource2);
if (typeCompare == 0) {
return compareName(resource1, resource2);
}
return typeCompare;
}
private int compareType(IResource resource1, IResource resource2) {
if (resource1.getType() == resource2.getType()) {
return 0;
}
if ((resource1.getType() & folderTypes) > (resource2.getType() & folderTypes)) {
return -1;
} else {
return 1;
}
}
private int compareName(IResource resource1, IResource resource2) {
return Collator.getInstance().compare(resource1.getName(), resource2.getName());
}
};
}
}
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