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/*******************************************************************************
* Copyright (c) 2003, 2004 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.jst.j2ee.navigator.internal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
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.ISchedulingRule;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jem.util.emf.workbench.ProjectUtilities;
import org.eclipse.jface.viewers.AbstractTreeViewer;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jst.common.navigator.internal.providers.CommonAdapterFactoryContentProvider;
import org.eclipse.jst.j2ee.internal.ejb.provider.BeanClassProviderHelper;
import org.eclipse.jst.j2ee.internal.provider.MethodsProviderDelegate;
import org.eclipse.jst.j2ee.navigator.internal.EMFRootObjectProvider.IRefreshHandlerListener;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.progress.UIJob;
import org.eclipse.wst.common.internal.emfworkbench.integration.DynamicAdapterFactory;
import org.eclipse.wst.common.navigator.internal.provisional.views.AdaptabilityUtility;
import org.eclipse.wst.common.navigator.internal.provisional.views.CommonViewer;
/**
* <p>
* The following class is experimental until fully documented.
* </p>
*/
public class J2EEContentProvider implements ITreeContentProvider, IRefreshHandlerListener {
private static final Class IPROJECT_CLASS = IProject.class;
private final EMFRootObjectProvider rootObjectProvider;
private AdapterFactoryContentProvider delegateContentProvider;
private MethodsProviderDelegate delegateMethodsProvider;
private String viewerId = null;
Viewer viewer;
/**
*
*/
public J2EEContentProvider() {
rootObjectProvider = new EMFRootObjectProvider();
rootObjectProvider.addRefreshHandlerListener(this);
}
/**
*
*/
public J2EEContentProvider(String aViewerId) {
rootObjectProvider = new EMFRootObjectProvider();
updateContentProviders(aViewerId);
rootObjectProvider.addRefreshHandlerListener(this);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
*/
public Object[] getElements(Object anInputElement) {
return getChildren(anInputElement);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider#getChildren(java.lang.Object)
*/
public Object[] getChildren(Object aParentElement) {
IProject project = null;
List children = new ArrayList();
if (aParentElement instanceof IProject || aParentElement instanceof IJavaProject) {
project = (IProject) ((IAdaptable) aParentElement).getAdapter(IPROJECT_CLASS);
if (project != null) {
Object[] rootObjects = (rootObjectProvider != null) ? rootObjectProvider.getModels(project) : null;
if (rootObjects != null) {
for (int x=0; x< rootObjects.length ; ++x) {
children.add(rootObjects[x]);
}
}
}
} else if (MethodsProviderDelegate.providesContentFor(aParentElement))
return delegateMethodsProvider.getChildren(aParentElement);
else /* if (isEMFEditObject(aParentElement)) */{
Object[] siblings = delegateContentProvider.getChildren(aParentElement);
if (siblings != null)
children.addAll(Arrays.asList(siblings));
}
return children.toArray();
}
public Object getParent(Object object) {
if (MethodsProviderDelegate.providesContentFor(object))
return delegateMethodsProvider.getParent(object);
Object parent = delegateContentProvider.getParent(object);
if (parent == null && object instanceof BeanClassProviderHelper)
parent = ((BeanClassProviderHelper) object).getEjb();
if (parent == null && object instanceof EObject)
parent = ProjectUtilities.getProject((EObject) object);
return parent;
}
/**
* @see org.eclipse.jface.viewers.IContentProvider#dispose()
*/
public void dispose() {
rootObjectProvider.removeRefreshHandlerListener(this);
delegateContentProvider.dispose();
rootObjectProvider.dispose();
delegateMethodsProvider.dispose();
}
/*
* @see ITreeContentProvider#hasChildren(Object)
*/
public boolean hasChildren(Object element) {
if (MethodsProviderDelegate.providesContentFor(element))
return delegateMethodsProvider.hasChildren(element);
/* else if (isEMFEditObject(element)) */
return delegateContentProvider.hasChildren(element);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer,
* java.lang.Object, java.lang.Object)
*/
public void inputChanged(Viewer aViewer, Object anOldInput, Object aNewInput) {
String newViewerId = null;
viewer = aViewer;
if (aViewer instanceof CommonViewer)
newViewerId = ((CommonViewer) aViewer).getNavigatorContentService().getViewerId();
if (newViewerId != null && (viewerId == null || !viewerId.equals(newViewerId)))
updateContentProviders(newViewerId);
delegateContentProvider.inputChanged(aViewer, anOldInput, aNewInput);
delegateMethodsProvider.inputChanged(aViewer, anOldInput, aNewInput);
}
/**
* @param viewerId2
*/
private void updateContentProviders(String aViewerId) {
/* Dispose of the existing content providers */
if (delegateContentProvider != null)
delegateContentProvider.dispose();
if (delegateMethodsProvider != null)
delegateMethodsProvider.dispose();
/* Create new content providers using the new viewer id */
DynamicAdapterFactory adapterFactory = new DynamicAdapterFactory(aViewerId);
delegateContentProvider = new CommonAdapterFactoryContentProvider(adapterFactory);
delegateMethodsProvider = new MethodsProviderDelegate(adapterFactory);
/* Remember the viewer id */
viewerId = aViewerId;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.j2ee.navigator.internal.EMFRootObjectManager.IRefreshHandlerListener#onRefresh(java.lang.Object)
*/
public void onRefresh(final Object element) {
if (viewer instanceof AbstractTreeViewer) {
if (Display.getCurrent() != null) {
((AbstractTreeViewer) viewer).refresh(element, true);
} else {
/* Create and schedule a UI Job to update the Navigator Content Viewer */
Job job = new UIJob("Update the Navigator Content Viewer Job") { //$NON-NLS-1$
public IStatus runInUIThread(IProgressMonitor monitor) {
((AbstractTreeViewer) viewer).refresh(element, true);
return Status.OK_STATUS;
}
};
if (element instanceof ISchedulingRule)
job.setRule((ISchedulingRule)element);
else {
ISchedulingRule rule = (ISchedulingRule)AdaptabilityUtility.getAdapter(element,ISchedulingRule.class);
if (rule != null) {
job.setRule(rule);
}
}
job.schedule();
}
}
}
}
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