plugins/org.argeo.slc.akb.ui/src/main/java/org/argeo/slc/akb/ui/providers/TemplatesTreeContentProvider.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.akb.ui.providers;
  17
  18 import java.util.ArrayList;
  19 import java.util.List;
  20
  21 import javax.jcr.Node;
  22 import javax.jcr.NodeIterator;
  23 import javax.jcr.RepositoryException;
  24
  25 import org.argeo.slc.akb.AkbException;
  26 import org.argeo.slc.akb.AkbTypes;
  27 import org.eclipse.jface.viewers.ITreeContentProvider;
  28 import org.eclipse.jface.viewers.Viewer;
  29
  30 /** Basic content provider for a tree of AKB environment templates */
  31 public class TemplatesTreeContentProvider implements ITreeContentProvider {
  32
  33         /**
  34          * @param parent
  35          *            Pass current user home as parameter
  36          *
  37          */
  38         public Object[] getElements(Object parent) {
  39                 if (parent instanceof Object[])
  40                         return (Object[]) parent;
  41                 else
  42                         return null;
  43         }
  44
  45         public Object getParent(Object child) {
  46                 try {
  47                         Node node = (Node) child;
  48                         if (node.getDepth() == 0)
  49                                 return null;
  50                         else
  51                                 return node.getParent();
  52                 } catch (RepositoryException e) {
  53                         throw new AkbException("Error while getting parent node", e);
  54                 }
  55         }
  56
  57         public Object[] getChildren(Object parent) {
  58                 try {
  59                         NodeIterator ni = ((Node) parent).getNodes();
  60                         List<Node> nodes = new ArrayList<Node>();
  61
  62                         while (ni.hasNext()) {
  63                                 Node currNode = ni.nextNode();
  64                                 if (!currNode.isNodeType(AkbTypes.AKB_CONNECTOR_FOLDER))
  65                                         nodes.add(currNode);
  66                         }
  67
  68                         return nodes.toArray();
  69                 } catch (RepositoryException e) {
  70                         throw new AkbException("Error while getting children nodes", e);
  71                 }
  72         }
  73
  74         public boolean hasChildren(Object parent) {
  75                 try {
  76                         // refine this
  77                         return ((Node) parent).hasNodes();
  78                 } catch (RepositoryException e) {
  79                         throw new AkbException("Error while checking children nodes", e);
  80                 }
  81         }
  82
  83         public void dispose() {
  84                 // FIXME implement if needed
  85         }
  86
  87         public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
  88         }
  89 }