/*******************************************************************************
* Copyright (c) 2000, 2010 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.jdt.internal.ui.workingsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.ui.IWorkingSet;
import org.eclipse.ui.IWorkingSetUpdater;
import org.eclipse.jdt.core.ElementChangedEvent;
import org.eclipse.jdt.core.IElementChangedListener;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaElementDelta;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
public class JavaWorkingSetUpdater implements IWorkingSetUpdater, IElementChangedListener {
/**
* DO NOT REMOVE, used in a product, see https://bugs.eclipse.org/297529 .
* @deprecated As of 3.5, replaced by {@link IWorkingSetIDs#JAVA}
*/
public static final String ID= IWorkingSetIDs.JAVA;
private List fWorkingSets;
private static class WorkingSetDelta {
private IWorkingSet fWorkingSet;
private List fElements;
private boolean fChanged;
public WorkingSetDelta(IWorkingSet workingSet) {
fWorkingSet= workingSet;
fElements= new ArrayList(Arrays.asList(workingSet.getElements()));
}
public int indexOf(Object element) {
return fElements.indexOf(element);
}
public void set(int index, Object element) {
fElements.set(index, element);
fChanged= true;
}
public void remove(int index) {
if (fElements.remove(index) != null) {
fChanged= true;
}
}
public void process() {
if (fChanged) {
fWorkingSet.setElements((IAdaptable[])fElements.toArray(new IAdaptable[fElements.size()]));
}
}
}
public JavaWorkingSetUpdater() {
fWorkingSets= new ArrayList();
JavaCore.addElementChangedListener(this);
}
/**
* {@inheritDoc}
*/
public void add(IWorkingSet workingSet) {
checkElementExistence(workingSet);
synchronized (fWorkingSets) {
fWorkingSets.add(workingSet);
}
}
/**
* {@inheritDoc}
*/
public boolean remove(IWorkingSet workingSet) {
boolean result;
synchronized(fWorkingSets) {
result= fWorkingSets.remove(workingSet);
}
return result;
}
/**
* {@inheritDoc}
*/
public boolean contains(IWorkingSet workingSet) {
synchronized(fWorkingSets) {
return fWorkingSets.contains(workingSet);
}
}
/**
* {@inheritDoc}
*/
public void dispose() {
synchronized(fWorkingSets) {
fWorkingSets.clear();
}
JavaCore.removeElementChangedListener(this);
}
/**
* {@inheritDoc}
*/
public void elementChanged(ElementChangedEvent event) {
IWorkingSet[] workingSets;
synchronized(fWorkingSets) {
workingSets= (IWorkingSet[])fWorkingSets.toArray(new IWorkingSet[fWorkingSets.size()]);
}
for (int w= 0; w < workingSets.length; w++) {
WorkingSetDelta workingSetDelta= new WorkingSetDelta(workingSets[w]);
processJavaDelta(workingSetDelta, event.getDelta());
IResourceDelta[] resourceDeltas= event.getDelta().getResourceDeltas();
if (resourceDeltas != null) {
for (int r= 0; r < resourceDeltas.length; r++) {
processResourceDelta(workingSetDelta, resourceDeltas[r]);
}
}
workingSetDelta.process();
}
}
private void processJavaDelta(WorkingSetDelta result, IJavaElementDelta delta) {
IJavaElement jElement= delta.getElement();
int index= result.indexOf(jElement);
int type= jElement.getElementType();
int kind= delta.getKind();
int flags= delta.getFlags();
if (type == IJavaElement.JAVA_PROJECT && kind == IJavaElementDelta.CHANGED) {
if (index != -1 && (flags & IJavaElementDelta.F_CLOSED) != 0) {
result.set(index, ((IJavaProject)jElement).getProject());
} else if ((flags & IJavaElementDelta.F_OPENED) != 0) {
index= result.indexOf(((IJavaProject)jElement).getProject());
if (index != -1)
result.set(index, jElement);
}
}
if (index != -1) {
if (kind == IJavaElementDelta.REMOVED) {
if ((flags & IJavaElementDelta.F_MOVED_TO) != 0) {
result.set(index, delta.getMovedToElement());
} else {
result.remove(index);
}
}
}
IResourceDelta[] resourceDeltas= delta.getResourceDeltas();
if (resourceDeltas != null) {
for (int i= 0; i < resourceDeltas.length; i++) {
processResourceDelta(result, resourceDeltas[i]);
}
}
IJavaElementDelta[] children= delta.getAffectedChildren();
for (int i= 0; i < children.length; i++) {
processJavaDelta(result, children[i]);
}
}
private void processResourceDelta(WorkingSetDelta result, IResourceDelta delta) {
IResource resource= delta.getResource();
int type= resource.getType();
int index= result.indexOf(resource);
int kind= delta.getKind();
int flags= delta.getFlags();
if (kind == IResourceDelta.CHANGED && type == IResource.PROJECT && index != -1) {
if ((flags & IResourceDelta.OPEN) != 0) {
result.set(index, resource);
}
}
if (index != -1 && kind == IResourceDelta.REMOVED) {
if ((flags & IResourceDelta.MOVED_TO) != 0) {
result.set(index,
ResourcesPlugin.getWorkspace().getRoot().findMember(delta.getMovedToPath()));
} else {
result.remove(index);
}
}
// Don't dive into closed or opened projects
if (projectGotClosedOrOpened(resource, kind, flags))
return;
IResourceDelta[] children= delta.getAffectedChildren();
for (int i= 0; i < children.length; i++) {
processResourceDelta(result, children[i]);
}
}
private boolean projectGotClosedOrOpened(IResource resource, int kind, int flags) {
return resource.getType() == IResource.PROJECT
&& kind == IResourceDelta.CHANGED
&& (flags & IResourceDelta.OPEN) != 0;
}
private void checkElementExistence(IWorkingSet workingSet) {
List elements= new ArrayList(Arrays.asList(workingSet.getElements()));
boolean changed= false;
for (Iterator iter= elements.iterator(); iter.hasNext();) {
IAdaptable element= (IAdaptable)iter.next();
boolean remove= false;
if (element instanceof IJavaElement) {
IJavaElement jElement= (IJavaElement)element;
// If we have directly a project then remove it when it
// doesn't exist anymore. However if we have a sub element
// under a project only remove the element if the parent
// project is open. Otherwise we would remove all elements
// in closed projects.
if (jElement instanceof IJavaProject) {
remove= !jElement.exists();
} else {
final IJavaProject javaProject= jElement.getJavaProject();
final boolean isProjectOpen= javaProject != null ? javaProject.getProject().isOpen() : true;
remove= isProjectOpen && !jElement.exists();
}
} else if (element instanceof IResource) {
IResource resource= (IResource)element;
// See comments above
if (resource instanceof IProject) {
remove= !resource.exists();
} else {
IProject project= resource.getProject();
remove= (project != null ? project.isOpen() : true) && !resource.exists();
}
}
if (remove) {
iter.remove();
changed= true;
}
}
if (changed) {
workingSet.setElements((IAdaptable[])elements.toArray(new IAdaptable[elements.size()]));
}
}
}