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/*******************************************************************************
* Copyright (c) 2007, 2011 Oracle.
* 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:
* Oracle - initial API and implementation
*******************************************************************************/
package org.eclipse.jpt.jaxb.ui.internal.navigator;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jpt.common.utility.model.event.CollectionAddEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionChangeEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionClearEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionRemoveEvent;
import org.eclipse.jpt.common.utility.model.listener.CollectionChangeListener;
import org.eclipse.jpt.jaxb.core.JaxbProject;
import org.eclipse.jpt.jaxb.core.JaxbProjectManager;
import org.eclipse.jpt.jaxb.core.JptJaxbCorePlugin;
import org.eclipse.jpt.jaxb.core.platform.JaxbPlatformDescription;
import org.eclipse.jpt.jaxb.ui.JptJaxbUiPlugin;
import org.eclipse.jpt.jaxb.ui.platform.JaxbPlatformUi;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.navigator.ICommonContentExtensionSite;
import org.eclipse.ui.navigator.ICommonContentProvider;
/**
* This extension of navigator content provider delegates to the platform UI
* (see the org.eclipse.jpt.jaxb.ui.jaxbPlatformUis extension point) for navigator content.
*
* If there is a platform UI for the given project, this content provider will
* provide a root "JAXB Content" node (child of the project), otherwise there
* will be no content. For children of the "JAXB Content" node (or for any other
* sub-node), this provider will delegate to the content provider returned by the
* platform UI implementation.
*/
public class JaxbNavigatorContentProvider
implements ICommonContentProvider {
private JaxbNavigatorContentAndLabelProvider delegate;
private final CollectionChangeListener jaxbProjectListener;
private StructuredViewer viewer;
public JaxbNavigatorContentProvider() {
super();
this.jaxbProjectListener = this.buildJaxbProjectListener();
JptJaxbCorePlugin.getProjectManager().addCollectionChangeListener(JaxbProjectManager.JAXB_PROJECTS_COLLECTION, this.jaxbProjectListener);
}
protected CollectionChangeListener buildJaxbProjectListener() {
return new JaxbProjectListener();
}
public JaxbNavigatorContentAndLabelProvider getDelegate() {
return this.delegate;
}
// **************** IContentProvider implementation ************************
public void dispose() {
JptJaxbCorePlugin.getProjectManager().removeCollectionChangeListener(JaxbProjectManager.JAXB_PROJECTS_COLLECTION, this.jaxbProjectListener);
if (this.delegate != null) {
this.delegate.dispose();
}
}
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
if (this.delegate != null) {
this.delegate.inputChanged(viewer, oldInput, newInput);
}
this.viewer = (StructuredViewer) viewer;
}
// **************** IStructuredContentProvider implementation **************
public Object[] getElements(Object inputElement) {
return getChildren(inputElement);
}
// **************** ITreeContentProvider implementation ********************
public Object getParent(Object element) {
if (this.delegate != null) {
return this.delegate.getParent(element);
}
return null;
}
public boolean hasChildren(Object element) {
if (element instanceof IAdaptable) {
IProject project = (IProject) ((IAdaptable) element).getAdapter(IProject.class);
if (project != null) {
JaxbProject jaxbProject = JptJaxbCorePlugin.getJaxbProject(project);
if (jaxbProject != null) {
JaxbPlatformDescription desc = jaxbProject.getPlatform().getDescription();
JaxbPlatformUi platformUi =
JptJaxbUiPlugin.getJaxbPlatformUiManager().getJaxbPlatformUi(desc);
return platformUi != null;
}
}
}
if (this.delegate != null) {
return this.delegate.hasChildren(element);
}
return false;
}
public Object[] getChildren(Object parentElement) {
if (parentElement instanceof IAdaptable) {
IProject project = (IProject) ((IAdaptable) parentElement).getAdapter(IProject.class);
if (project != null) {
JaxbProject jaxbProject = JptJaxbCorePlugin.getJaxbProject(project);
if (jaxbProject != null) {
JaxbPlatformDescription desc = jaxbProject.getPlatform().getDescription();
JaxbPlatformUi platformUi =
JptJaxbUiPlugin.getJaxbPlatformUiManager().getJaxbPlatformUi(desc);
if (platformUi != null) {
return new Object[] {jaxbProject.getContextRoot()};
}
}
}
}
if (this.delegate != null) {
return this.delegate.getChildren(parentElement);
}
return new Object[0];
}
// **************** IMementoAware implementation ***************************
public void saveState(IMemento memento) {
// no op
}
public void restoreState(IMemento memento) {
// no op
}
// **************** ICommonContentProvider implementation ******************
public void init(ICommonContentExtensionSite config) {
if (this.delegate == null) {
JaxbNavigatorLabelProvider labelProvider = (JaxbNavigatorLabelProvider) config.getExtension().getLabelProvider();
if (labelProvider != null && labelProvider.getDelegate() != null) {
this.delegate = labelProvider.getDelegate();
}
else {
this.delegate = new JaxbNavigatorContentAndLabelProvider();
}
}
}
// **************** member classes *****************************************
private class JaxbProjectListener
implements CollectionChangeListener
{
public void collectionChanged(CollectionChangeEvent event) {
this.refreshViewer(null);
}
public void collectionCleared(CollectionClearEvent event) {
this.refreshViewer(null);
}
public void itemsAdded(CollectionAddEvent event) {
for (Object item : event.getItems()) {
this.refreshViewer(((JaxbProject) item).getProject());
}
}
public void itemsRemoved(CollectionRemoveEvent event) {
for (Object item : event.getItems()) {
this.refreshViewer(((JaxbProject) item).getProject());
}
}
private void refreshViewer(final IProject project) {
if (viewer != null
&& viewer.getControl() != null
&& !viewer.getControl().isDisposed()) {
// Using job here so that project model update (which also uses
// a job) will complete first
Job refreshJob = new Job("Refresh viewer") {
@Override
protected IStatus run(IProgressMonitor monitor) {
// Using runnable here so that refresh will go on correct thread
viewer.getControl().getDisplay().asyncExec(new Runnable() {
public void run() {
if (project != null) {
viewer.refresh(project);
}
else {
viewer.refresh();
}
}
});
return Status.OK_STATUS;
}
};
if (project != null) {
refreshJob.setRule(project);
}
refreshJob.schedule();
}
}
}
}
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