/*******************************************************************************
 * Copyright (c) 2000, 2018 IBM Corporation and others.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 *******************************************************************************/
package org.eclipse.dltk.internal.ui;

import org.eclipse.core.resources.IResource;
import org.eclipse.dltk.core.IModelElement;
import org.eclipse.dltk.core.ModelException;

/**
 * This class locates different resources which are related to an object
 */
public class ResourceLocator implements IResourceLocator {

	@Override
	public IResource getUnderlyingResource(Object element)
			throws ModelException {
		if (element instanceof IModelElement) {
			return ((IModelElement) element).getUnderlyingResource();
		}
		return null;
	}

	@Override
	public IResource getCorrespondingResource(Object element)
			throws ModelException {
		if (element instanceof IModelElement) {
			return ((IModelElement) element).getCorrespondingResource();
		}
		return null;
	}

	@Override
	public IResource getContainingResource(Object element)
			throws ModelException {
		IResource resource = null;
		if (element instanceof IResource)
			resource = (IResource) element;
		if (element instanceof IModelElement) {
			resource = ((IModelElement) element).getResource();
			if (resource == null)
				resource = ((IModelElement) element).getScriptProject()
						.getProject();
		}
		return resource;
	}
}