model/WorkspaceElem.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.cms.ui.workbench.internal.jcr.model;
  17
  18 import javax.jcr.Node;
  19 import javax.jcr.NodeIterator;
  20 import javax.jcr.RepositoryException;
  21 import javax.jcr.Session;
  22 // import javax.jcr.Workspace;
  23 import javax.jcr.Workspace;
  24
  25 import org.argeo.eclipse.ui.EclipseUiException;
  26 import org.argeo.eclipse.ui.TreeParent;
  27 import org.argeo.jcr.JcrUtils;
  28
  29 /**
  30  * UI Tree component. Wraps the root node of a JCR {@link Workspace}. It also
  31  * keeps a reference to its parent {@link RepositoryElem}, to be able to
  32  * retrieve alias of the current used repository
  33  */
  34 public class WorkspaceElem extends TreeParent {
  35         private Session session = null;
  36
  37         public WorkspaceElem(RepositoryElem parent, String name) {
  38                 this(parent, name, null);
  39         }
  40
  41         public WorkspaceElem(RepositoryElem parent, String name, Session session) {
  42                 super(name);
  43                 this.session = session;
  44                 setParent(parent);
  45         }
  46
  47         public synchronized Session getSession() {
  48                 return session;
  49         }
  50
  51         public synchronized Node getRootNode() {
  52                 try {
  53                         if (session != null)
  54                                 return session.getRootNode();
  55                         else
  56                                 return null;
  57                 } catch (RepositoryException e) {
  58                         throw new EclipseUiException("Cannot get root node of workspace "
  59                                         + getName(), e);
  60                 }
  61         }
  62
  63         public synchronized void login() {
  64                 try {
  65                         session = ((RepositoryElem) getParent()).repositoryLogin(getName());
  66                 } catch (RepositoryException e) {
  67                         throw new EclipseUiException("Cannot connect to repository "
  68                                         + getName(), e);
  69                 }
  70         }
  71
  72         public Boolean isConnected() {
  73                 if (session != null && session.isLive())
  74                         return true;
  75                 else
  76                         return false;
  77         }
  78
  79         @Override
  80         public synchronized void dispose() {
  81                 logout();
  82                 super.dispose();
  83         }
  84
  85         /** Logouts the session, does not nothing if there is no live session. */
  86         public synchronized void logout() {
  87                 clearChildren();
  88                 JcrUtils.logoutQuietly(session);
  89                 session = null;
  90         }
  91
  92         @Override
  93         public synchronized boolean hasChildren() {
  94                 try {
  95                         if (isConnected())
  96                                 return session.getRootNode().hasNodes();
  97                         else
  98                                 return false;
  99                 } catch (RepositoryException re) {
 100                         throw new EclipseUiException(
 101                                         "Unexpected error while checking children node existence",
 102                                         re);
 103                 }
 104         }
 105
 106         /** Override normal behaviour to initialize display of the workspace */
 107         @Override
 108         public synchronized Object[] getChildren() {
 109                 if (isLoaded()) {
 110                         return super.getChildren();
 111                 } else {
 112                         // initialize current object
 113                         try {
 114                                 Node rootNode;
 115                                 if (session == null)
 116                                         return null;
 117                                 else
 118                                         rootNode = session.getRootNode();
 119                                 NodeIterator ni = rootNode.getNodes();
 120                                 while (ni.hasNext()) {
 121                                         Node node = ni.nextNode();
 122                                         addChild(new SingleJcrNodeElem(this, node, node.getName()));
 123                                 }
 124                                 return super.getChildren();
 125                         } catch (RepositoryException e) {
 126                                 throw new EclipseUiException(
 127                                                 "Cannot initialize WorkspaceNode UI object."
 128                                                                 + getName(), e);
 129                         }
 130                 }
 131         }
 132 }