content: /*******************************************************************************
   * Copyright (c) 2000, 2008 IBM Corporation and others.
   * 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:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.corext.refactoring.util;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.eclipse.core.resources.IFile;
  import org.eclipse.core.resources.IResource;
  import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
  import org.eclipse.wst.jsdt.core.IJavaScriptElement;
  import org.eclipse.wst.jsdt.core.IOpenable;
  
  
  public class ResourceUtil {
  	
  	private ResourceUtil(){
  	}
  	
  	public static IFile[] getFiles(IJavaScriptUnit[] cus) {
  		List files= new ArrayList(cus.length);
  		for (int i= 0; i < cus.length; i++) {
  			IResource resource= cus[i].getResource();
  			if (resource != null && resource.getType() == IResource.FILE)
  				files.add(resource);
  		}
  		return (IFile[]) files.toArray(new IFile[files.size()]);
  	}
  
  	public static IFile getFile(IJavaScriptUnit cu) {
  		IResource resource= cu.getResource();
  		if (resource != null && resource.getType() == IResource.FILE)
  			return (IFile)resource;
  		else
  			return null;
  	}
  
  	//----- other ------------------------------
  			
  	public static IResource getResource(Object o){
  		if (o instanceof IResource)
  			return (IResource)o;
  		if (o instanceof IJavaScriptElement)
  			return getResource((IJavaScriptElement)o);
  		return null;	
  	}
  
  	private static IResource getResource(IJavaScriptElement element){
  		if (element.getElementType() == IJavaScriptElement.JAVASCRIPT_UNIT)
  			return ((IJavaScriptUnit) element).getResource();
  		else if (element instanceof IOpenable) 
  			return element.getResource();
  		else	
  			return null;	
  	}
  }
  