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/*******************************************************************************
* Copyright (c) 2008 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 java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jpt.core.JpaPlatform;
import org.eclipse.jpt.core.context.JpaContextNode;
import org.eclipse.jpt.ui.jface.DelegatingContentAndLabelProvider;
import org.eclipse.jpt.ui.jface.TreeItemContentProvider;
import org.eclipse.jpt.ui.jface.TreeItemContentProviderFactory;
import org.eclipse.jpt.ui.navigator.JpaNavigatorProvider;
public class JpaNavigatorTreeItemContentProviderFactory
implements TreeItemContentProviderFactory
{
/**
* Exactly *one* of these factories is created for each view that utilizes it.
* Therefore, as we delegate to the platform UI for each project, we should
* maintain the same multiplicity. That is, if there is a delegate for each
* platform UI, we should maintain *one* delegate for each view.
*
* Key: platform id, Value: delegate content provider factory
*/
private Map<String, TreeItemContentProviderFactory> delegates;
public JpaNavigatorTreeItemContentProviderFactory() {
super();
this.delegates = new HashMap<String, TreeItemContentProviderFactory>();
}
public TreeItemContentProvider buildItemContentProvider(Object item, DelegatingContentAndLabelProvider contentAndLabelProvider) {
TreeItemContentProviderFactory delegate = getDelegate(item);
if (delegate != null) {
return delegate.buildItemContentProvider(item, contentAndLabelProvider);
}
return null;
}
private TreeItemContentProviderFactory getDelegate(Object element) {
if (! (element instanceof IAdaptable)) {
return null;
}
JpaContextNode contextNode = (JpaContextNode) ((IAdaptable) element).getAdapter(JpaContextNode.class);
if (contextNode == null) {
return null;
}
JpaPlatform platform = contextNode.getJpaProject().getJpaPlatform();
String platformId = platform.getId();
if (delegates.containsKey(platformId)) {
return delegates.get(platformId);
}
JpaNavigatorProvider navigatorProvider = JpaNavigatorProviderLookup.provider(platform.getId());
TreeItemContentProviderFactory delegate = null;
if (navigatorProvider != null) {
delegate = navigatorProvider.getTreeItemContentProviderFactory();
}
delegates.put(platformId, delegate);
return delegate;
}
}
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