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/*******************************************************************************
* Copyright (c) 2007, 2009 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.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.core.JpaProject;
import org.eclipse.jpt.core.JptCorePlugin;
import org.eclipse.jpt.ui.JpaPlatformUi;
import org.eclipse.jpt.ui.JptUiPlugin;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.navigator.ICommonContentExtensionSite;
import org.eclipse.ui.navigator.ICommonContentProvider;
import org.eclipse.wst.common.project.facet.core.FacetedProjectFramework;
import org.eclipse.wst.common.project.facet.core.ProjectFacetsManager;
import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectEvent;
import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectListener;
import org.eclipse.wst.common.project.facet.core.events.IProjectFacetActionEvent;
/**
* This extension of navigator content provider delegates to the platform UI
* (see the org.eclipse.jpt.ui.jpaPlatform extension point) for navigator content.
*
* If there is a platform UI for the given project, this content provider will
* provide a root "JPA Content" node (child of the project), otherwise there
* will be no content. For children of the "JPA Content" node (or for any other
* sub-node), this provider will delegate to the content provider returned by the
* platform UI implementation.
*/
public class JpaNavigatorContentProvider
implements ICommonContentProvider
{
private JpaNavigatorContentAndLabelProvider delegate;
private IFacetedProjectListener facetListener;
private StructuredViewer viewer;
public JpaNavigatorContentProvider() {
super();
facetListener = new FacetListener();
FacetedProjectFramework.addListener(
facetListener,
IFacetedProjectEvent.Type.POST_INSTALL,
IFacetedProjectEvent.Type.POST_UNINSTALL,
IFacetedProjectEvent.Type.PROJECT_MODIFIED);
}
public JpaNavigatorContentAndLabelProvider delegate() {
return delegate;
}
// **************** IContentProvider implementation ************************
public void dispose() {
FacetedProjectFramework.removeListener(facetListener);
if (delegate != null) {
delegate.dispose();
}
}
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
if (delegate != null) {
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 (delegate != null) {
return 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) {
JpaProject jpaProject = JptCorePlugin.getJpaProject(project);
if (jpaProject != null) {
JpaPlatformUi platformUi = JptUiPlugin.instance().getJpaPlatformUi(jpaProject.getJpaPlatform());
return platformUi != null;
}
}
}
if (delegate != null) {
return 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) {
JpaProject jpaProject = JptCorePlugin.getJpaProject(project);
if (jpaProject != null) {
JpaPlatformUi platformUi = JptUiPlugin.instance().getJpaPlatformUi(jpaProject.getJpaPlatform());
if (platformUi != null) {
return new Object[] {jpaProject.getRootContextNode()};
}
}
}
}
if (delegate != null) {
return 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 (delegate == null) {
JpaNavigatorLabelProvider labelProvider = (JpaNavigatorLabelProvider) config.getExtension().getLabelProvider();
if (labelProvider != null && labelProvider.delegate() != null) {
delegate = labelProvider.delegate();
}
else {
delegate = new JpaNavigatorContentAndLabelProvider();
}
}
}
// **************** member classes *****************************************
private class FacetListener
implements IFacetedProjectListener
{
public void handleEvent(IFacetedProjectEvent event) {
if (event.getType() == IFacetedProjectEvent.Type.PROJECT_MODIFIED) {
refreshViewer(event.getProject().getProject());
}
else if (event.getType() == IFacetedProjectEvent.Type.POST_INSTALL
|| event.getType() == IFacetedProjectEvent.Type.POST_UNINSTALL) {
IProjectFacetActionEvent ipaEvent = (IProjectFacetActionEvent) event;
if (ipaEvent.getProjectFacet().equals(
ProjectFacetsManager.getProjectFacet(JptCorePlugin.FACET_ID))) {
refreshViewer(ipaEvent.getProject().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() {
viewer.refresh(project);
}
});
return Status.OK_STATUS;
}
};
refreshJob.setRule(project);
refreshJob.schedule();
}
}
}
}
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