case-study/jdt-after/core refactoring/org/eclipse/jdt/internal/corext/refactoring/util/ResourceUtil.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2011 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.jdt.internal.corext.refactoring.util;
  12
  13 import java.util.ArrayList;
  14 import java.util.List;
  15
  16 import org.eclipse.core.resources.IFile;
  17 import org.eclipse.core.resources.IResource;
  18
  19 import org.eclipse.jdt.core.ICompilationUnit;
  20 import org.eclipse.jdt.core.IJavaElement;
  21 import org.eclipse.jdt.core.IOpenable;
  22
  23
  24 public class ResourceUtil {
  25
  26         private ResourceUtil(){
  27         }
  28
  29         public static IFile[] getFiles(ICompilationUnit[] cus) {
  30                 List<IResource> files= new ArrayList<IResource>(cus.length);
  31                 for (int i= 0; i < cus.length; i++) {
  32                         IResource resource= cus[i].getResource();
  33                         if (resource != null && resource.getType() == IResource.FILE)
  34                                 files.add(resource);
  35                 }
  36                 return files.toArray(new IFile[files.size()]);
  37         }
  38
  39         public static IFile getFile(ICompilationUnit cu) {
  40                 IResource resource= cu.getResource();
  41                 if (resource != null && resource.getType() == IResource.FILE)
  42                         return (IFile)resource;
  43                 else
  44                         return null;
  45         }
  46
  47         //----- other ------------------------------
  48
  49         public static IResource getResource(Object o){
  50                 if (o instanceof IResource)
  51                         return (IResource)o;
  52                 if (o instanceof IJavaElement)
  53                         return getResource((IJavaElement)o);
  54                 return null;
  55         }
  56
  57         private static IResource getResource(IJavaElement element){
  58                 if (element.getElementType() == IJavaElement.COMPILATION_UNIT)
  59                         return ((ICompilationUnit) element).getResource();
  60                 else if (element instanceof IOpenable)
  61                         return element.getResource();
  62                 else
  63                         return null;
  64         }
  65 }