server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/browser/NodeContentProvider.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.jcr.ui.explorer.browser;
  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.RepositoryFactory;
  24 import javax.jcr.Session;
  25
  26 import org.argeo.eclipse.ui.TreeParent;
  27 import org.argeo.jcr.ArgeoJcrConstants;
  28 import org.argeo.jcr.RepositoryRegister;
  29 import org.argeo.jcr.UserJcrUtils;
  30 import org.argeo.jcr.ui.explorer.model.RepositoriesNode;
  31 import org.argeo.jcr.ui.explorer.model.SingleJcrNode;
  32 import org.argeo.jcr.ui.explorer.utils.TreeObjectsComparator;
  33 import org.argeo.util.security.Keyring;
  34 import org.eclipse.jface.viewers.ITreeContentProvider;
  35 import org.eclipse.jface.viewers.Viewer;
  36
  37 /**
  38  * Implementation of the {@code ITreeContentProvider} to display multiple
  39  * repository environment in a tree like structure
  40  *
  41  */
  42 public class NodeContentProvider implements ITreeContentProvider {
  43         final private RepositoryRegister repositoryRegister;
  44         final private RepositoryFactory repositoryFactory;
  45         /**
  46          * A session of the logged in user on the default workspace of the node
  47          * repository.
  48          */
  49         final private Session userSession;
  50         final private Keyring keyring;
  51         final private boolean sortChildren;
  52
  53         // reference for cleaning
  54         private SingleJcrNode homeNode = null;
  55         private RepositoriesNode repositoriesNode = null;
  56
  57         // Utils
  58         private TreeObjectsComparator itemComparator = new TreeObjectsComparator();
  59
  60         public NodeContentProvider(Session userSession, Keyring keyring,
  61                         RepositoryRegister repositoryRegister,
  62                         RepositoryFactory repositoryFactory, Boolean sortChildren) {
  63                 this.userSession = userSession;
  64                 this.keyring = keyring;
  65                 this.repositoryRegister = repositoryRegister;
  66                 this.repositoryFactory = repositoryFactory;
  67                 this.sortChildren = sortChildren;
  68         }
  69
  70         public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
  71                 if (newInput == null)// dispose
  72                         return;
  73
  74                 if (userSession != null) {
  75                         Node userHome = UserJcrUtils.getUserHome(userSession);
  76                         if (userHome != null) {
  77                                 // TODO : find a way to dynamically get alias for the node
  78                                 if (homeNode != null)
  79                                         homeNode.dispose();
  80                                 homeNode = new SingleJcrNode(null, userHome,
  81                                                 userSession.getUserID(), ArgeoJcrConstants.ALIAS_NODE);
  82                         }
  83                 }
  84                 if (repositoryRegister != null) {
  85                         if (repositoriesNode != null)
  86                                 repositoriesNode.dispose();
  87                         repositoriesNode = new RepositoriesNode("Repositories",
  88                                         repositoryRegister, repositoryFactory, null, userSession,
  89                                         keyring);
  90                 }
  91         }
  92
  93         /**
  94          * Sends back the first level of the Tree. Independent from inputElement
  95          * that can be null
  96          */
  97         public Object[] getElements(Object inputElement) {
  98                 List<Object> objs = new ArrayList<Object>();
  99                 if (homeNode != null)
 100                         objs.add(homeNode);
 101                 if (repositoriesNode != null)
 102                         objs.add(repositoriesNode);
 103                 return objs.toArray();
 104         }
 105
 106         public Object[] getChildren(Object parentElement) {
 107                 if (parentElement instanceof TreeParent) {
 108                         if (sortChildren) {
 109                                 // TreeParent[] arr = (TreeParent[]) ((TreeParent)
 110                                 // parentElement)
 111                                 // .getChildren();
 112                                 Object[] tmpArr = ((TreeParent) parentElement).getChildren();
 113                                 TreeParent[] arr = new TreeParent[tmpArr.length];
 114                                 for (int i = 0; i < tmpArr.length; i++)
 115                                         arr[i] = (TreeParent) tmpArr[i];
 116
 117                                 Arrays.sort(arr, itemComparator);
 118                                 return arr;
 119                         } else
 120                                 return ((TreeParent) parentElement).getChildren();
 121
 122                 } else {
 123                         return new Object[0];
 124                 }
 125         }
 126
 127         public Object getParent(Object element) {
 128                 if (element instanceof TreeParent) {
 129                         return ((TreeParent) element).getParent();
 130                 } else
 131                         return null;
 132         }
 133
 134         public boolean hasChildren(Object element) {
 135                 if (element instanceof RepositoriesNode) {
 136                         RepositoryRegister rr = ((RepositoriesNode) element)
 137                                         .getRepositoryRegister();
 138                         return rr.getRepositories().size() > 0;
 139                 } else if (element instanceof TreeParent) {
 140                         TreeParent tp = (TreeParent) element;
 141                         return tp.hasChildren();
 142                 }
 143                 return false;
 144         }
 145
 146         public void dispose() {
 147                 if (homeNode != null)
 148                         homeNode.dispose();
 149                 if (repositoriesNode != null) {
 150                         // logs out open sessions
 151                         // see https://bugzilla.argeo.org/show_bug.cgi?id=23
 152                         repositoriesNode.dispose();
 153                 }
 154         }
 155
 156 }