/*******************************************************************************
 *  Copyright (c) 2007 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;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IAdapterFactory;
import org.eclipse.jpt.core.JpaFile;
import org.eclipse.jpt.core.JpaProject;
import org.eclipse.jpt.core.JptCorePlugin;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;

public class JpaFileAdapterFactory
	implements IAdapterFactory
{
	@SuppressWarnings("unchecked")
	private static final Class[] ADAPTER_LIST = 
			new Class[] { JpaFile.class };
	
	@SuppressWarnings("unchecked")
	public Class[] getAdapterList() {
		return ADAPTER_LIST;
	}
	
	@SuppressWarnings("unchecked")
	public Object getAdapter(Object adaptableObject, Class adapterType) {
		if (! (adaptableObject instanceof IEditorPart)) {
			return null;
		}
		
		IEditorInput editorInput = ((IEditorPart) adaptableObject).getEditorInput();
		
		if (! (editorInput instanceof IFileEditorInput)) {
			return null;
		}
		
		IFile file = ((IFileEditorInput) editorInput).getFile();
		JpaProject jpaProject = JptCorePlugin.jpaProject(file.getProject());
		
		if (jpaProject == null) {
			return null;
		}
		
		return jpaProject.jpaFile(file);
	}
}