plugins/org.argeo.slc.client.ui.dist/src/main/java/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 public class ArtifactsTreeContentProvider implements ITreeContentProvider,
  33                 SlcTypes {
  34
  35         // Utils
  36         private boolean sortChildren = true;
  37         private JcrItemsComparator itemComparator = new JcrItemsComparator();
  38
  39         public Object[] getElements(Object parent) {
  40                 return getChildren(parent);
  41         }
  42
  43         public Object getParent(Object child) {
  44                 return null;
  45         }
  46
  47         public Object[] getChildren(Object parent) {
  48                 Object[] elements = null;
  49                 try {
  50                         if (parent instanceof Node) {
  51                                 Node node = (Node) parent;
  52                                 NodeIterator ni = node.getNodes();
  53                                 List<Node> nodesList = new ArrayList<Node>();
  54                                 while (ni.hasNext()) {
  55                                         nodesList.add(ni.nextNode());
  56                                 }
  57                                 if (sortChildren) {
  58                                         Node[] arr = (Node[]) nodesList.toArray(new Node[nodesList
  59                                                         .size()]);
  60                                         Arrays.sort(arr, itemComparator);
  61                                         return arr;
  62                                 } else
  63                                         return nodesList.toArray();
  64
  65                         }
  66                 } catch (RepositoryException e) {
  67                         throw new ArgeoException(
  68                                         "Unexpected exception while listing node properties", e);
  69                 }
  70                 return elements;
  71         }
  72
  73         public boolean hasChildren(Object parent) {
  74                 try {
  75                         if (parent instanceof Node) {
  76                                 Node curNode = (Node) parent;
  77                                 // We manually stop digging at this level
  78                                 if (curNode.isNodeType(SLC_ARTIFACT_VERSION_BASE))
  79                                         return false;
  80                                 else if (curNode.hasNodes())
  81                                         return true;
  82                         }
  83                 } catch (RepositoryException e) {
  84                         throw new ArgeoException(
  85                                         "Unexpected exception while checking if property is multiple",
  86                                         e);
  87                 }
  88                 return false;
  89         }
  90
  91         public void setSortChildren(boolean sortChildren) {
  92                 this.sortChildren = sortChildren;
  93         }
  94
  95         public boolean getSortChildren() {
  96                 return sortChildren;
  97         }
  98
  99         public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 100         }
 101
 102         public void dispose() {
 103         }
 104 }