org.argeo.slc.client.ui.dist/src/org/argeo/slc/client/ui/dist/controllers/ArtifactsTreeContentProvider.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.client.ui.dist.controllers;
  17
  18 import java.util.ArrayList;
  19 import java.util.Arrays;
  20 import java.util.List;
  21
  22 import javax.jcr.Node;
  23 import javax.jcr.NodeIterator;
  24 import javax.jcr.RepositoryException;
  25
  26 import org.argeo.ArgeoException;
  27 import org.argeo.eclipse.ui.jcr.utils.JcrItemsComparator;
  28 import org.argeo.slc.jcr.SlcTypes;
  29 import org.eclipse.jface.viewers.ITreeContentProvider;
  30 import org.eclipse.jface.viewers.Viewer;
  31
  32 /** Enable specific browsing of an artifact tree */
  33 public class ArtifactsTreeContentProvider implements ITreeContentProvider,
  34                 SlcTypes {
  35         private static final long serialVersionUID = -8097817288192073987L;
  36
  37         // Utils
  38         private boolean sortChildren = true;
  39         private JcrItemsComparator itemComparator = new JcrItemsComparator();
  40
  41         public Object[] getElements(Object parent) {
  42                 return getChildren(parent);
  43         }
  44
  45         public Object getParent(Object child) {
  46                 return null;
  47         }
  48
  49         public Object[] getChildren(Object parent) {
  50                 Object[] elements = null;
  51                 try {
  52                         if (parent instanceof Node) {
  53                                 Node node = (Node) parent;
  54                                 NodeIterator ni = node.getNodes();
  55                                 List<Node> nodesList = new ArrayList<Node>();
  56                                 while (ni.hasNext()) {
  57                                         nodesList.add(ni.nextNode());
  58                                 }
  59                                 if (sortChildren) {
  60                                         Node[] arr = (Node[]) nodesList.toArray(new Node[nodesList
  61                                                         .size()]);
  62                                         Arrays.sort(arr, itemComparator);
  63                                         return arr;
  64                                 } else
  65                                         return nodesList.toArray();
  66
  67                         }
  68                 } catch (RepositoryException e) {
  69                         throw new ArgeoException(
  70                                         "Unexpected exception while listing node properties", e);
  71                 }
  72                 return elements;
  73         }
  74
  75         public boolean hasChildren(Object parent) {
  76                 try {
  77                         if (parent instanceof Node) {
  78                                 Node curNode = (Node) parent;
  79                                 // We manually stop digging at this level
  80                                 if (curNode.isNodeType(SLC_ARTIFACT_VERSION_BASE))
  81                                         return false;
  82                                 else if (curNode.hasNodes())
  83                                         return true;
  84                         }
  85                 } catch (RepositoryException e) {
  86                         throw new ArgeoException(
  87                                         "Unexpected exception while checking if property is multiple",
  88                                         e);
  89                 }
  90                 return false;
  91         }
  92
  93         public void setSortChildren(boolean sortChildren) {
  94                 this.sortChildren = sortChildren;
  95         }
  96
  97         public boolean getSortChildren() {
  98                 return sortChildren;
  99         }
 100
 101         public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 102         }
 103
 104         public void dispose() {
 105         }
 106 }