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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.internal.jface.DelegatingContentAndLabelProvider;
import org.eclipse.jpt.ui.internal.jface.ItemLabelProvider;
import org.eclipse.jpt.ui.internal.jface.ItemLabelProviderFactory;
import org.eclipse.jpt.ui.navigator.JpaNavigatorProvider;
public class JpaNavigatorItemLabelProviderFactory
implements ItemLabelProviderFactory
{
/**
* 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 final Map<String, ItemLabelProviderFactory> delegates;
public JpaNavigatorItemLabelProviderFactory() {
super();
this.delegates = new HashMap<String, ItemLabelProviderFactory>();
}
public ItemLabelProvider buildItemLabelProvider(Object item, DelegatingContentAndLabelProvider contentAndLabelProvider) {
ItemLabelProviderFactory delegate = getDelegate(item);
if (delegate != null) {
return delegate.buildItemLabelProvider(item, contentAndLabelProvider);
}
return null;
}
private ItemLabelProviderFactory 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.jpaProject().jpaPlatform();
String platformId = platform.getId();
if (delegates.containsKey(platformId)) {
return delegates.get(platformId);
}
JpaNavigatorProvider navigatorProvider = JpaNavigatorProviderLookup.provider(platform.getId());
ItemLabelProviderFactory delegate = null;
if (navigatorProvider != null) {
delegate = navigatorProvider.itemLabelProviderFactory();
}
delegates.put(platformId, delegate);
return delegate;
}
}
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