/*******************************************************************************
 *  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.structure;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IAdapterFactory;
import org.eclipse.jpt.core.internal.IJpaFile;
import org.eclipse.jpt.core.internal.IJpaProject;
import org.eclipse.jpt.core.internal.IResourceModel;
import org.eclipse.jpt.core.internal.JptCorePlugin;
import org.eclipse.jpt.core.internal.resource.java.JavaResourceModel;
import org.eclipse.jpt.core.internal.resource.orm.OrmResourceModel;
import org.eclipse.jpt.core.internal.resource.persistence.PersistenceResourceModel;
import org.eclipse.jpt.ui.internal.views.structure.JpaStructurePage;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;

public class JpaStructureProviderFactory
	implements IAdapterFactory
{
	@SuppressWarnings("unchecked")
	private static final Class[] ADAPTER_LIST = 
			new Class[] { JpaStructurePage.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();
		IJpaProject jpaProject = JptCorePlugin.jpaProject(file.getProject());
		
		if (jpaProject == null) {
			return null;
		}
		
		IJpaFile jpaFile = jpaProject.jpaFile(file);
		
		if (jpaFile == null) {
			return null;
		}
		
		IResourceModel resourceModel = jpaFile.getResourceModel();
		
		if (resourceModel instanceof JavaResourceModel) {
			return new JavaResourceModelStructureProvider((JavaResourceModel) resourceModel);
		}
		else if (resourceModel instanceof OrmResourceModel) {
			return new OrmResourceModelStructureProvider((OrmResourceModel) resourceModel);
		}
		else if (resourceModel instanceof PersistenceResourceModel) {
			return new PersistenceResourceModelStructureProvider((PersistenceResourceModel) resourceModel);
		}
		
		return null;
	}
}