case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/filters/EmptyInnerPackageFilter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2012 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.ui.filters;
  12
  13
  14 import org.eclipse.jface.viewers.Viewer;
  15 import org.eclipse.jface.viewers.ViewerFilter;
  16
  17 import org.eclipse.jdt.core.IPackageFragment;
  18 import org.eclipse.jdt.core.JavaModelException;
  19
  20
  21 /**
  22  * Filters empty non-leaf package fragments
  23  */
  24 public class EmptyInnerPackageFilter extends ViewerFilter {
  25
  26         /*
  27          * @see ViewerFilter
  28          */
  29         @Override
  30         public boolean select(Viewer viewer, Object parent, Object element) {
  31                 if (element instanceof IPackageFragment) {
  32                         IPackageFragment pkg= (IPackageFragment)element;
  33                         try {
  34                                 if (pkg.isDefaultPackage())
  35                                         return pkg.hasChildren();
  36                                 return !pkg.hasSubpackages() || pkg.hasChildren() || EmptyPackageFilter.hasUnfilteredResources(viewer, pkg);
  37                         } catch (JavaModelException e) {
  38                                 return false;
  39                         }
  40                 }
  41
  42                 return true;
  43         }
  44 }