server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/model/RepositoriesNode.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   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.model;
  17
  18 import java.util.Hashtable;
  19 import java.util.Map;
  20
  21 import javax.jcr.Node;
  22 import javax.jcr.NodeIterator;
  23 import javax.jcr.Repository;
  24 import javax.jcr.RepositoryException;
  25 import javax.jcr.RepositoryFactory;
  26 import javax.jcr.Session;
  27
  28 import org.argeo.ArgeoException;
  29 import org.argeo.eclipse.ui.ErrorFeedback;
  30 import org.argeo.eclipse.ui.TreeParent;
  31 import org.argeo.jcr.ArgeoJcrConstants;
  32 import org.argeo.jcr.ArgeoNames;
  33 import org.argeo.jcr.JcrUtils;
  34 import org.argeo.jcr.RepositoryRegister;
  35 import org.argeo.jcr.security.JcrKeyring;
  36
  37 /**
  38  * UI Tree component. Implements the Argeo abstraction of a
  39  * {@link RepositoryFactory} that enable a user to "mount" various repositories
  40  * in a single Tree like View. It is usually meant to be at the root of the UI
  41  * Tree and thus {@link getParent()} method will return null.
  42  *
  43  * The {@link RepositoryFactory} is injected at instantiation time and must be
  44  * use get or register new {@link Repository} objects upon which a reference is
  45  * kept here.
  46  */
  47
  48 public class RepositoriesNode extends TreeParent implements ArgeoNames {
  49         private final RepositoryRegister repositoryRegister;
  50         private final RepositoryFactory repositoryFactory;
  51
  52         private final JcrKeyring jcrKeyring;
  53
  54         public RepositoriesNode(String name, RepositoryRegister repositoryRegister,
  55                         RepositoryFactory repositoryFactory, TreeParent parent,
  56                         JcrKeyring jcrKeyring) {
  57                 super(name);
  58                 this.repositoryRegister = repositoryRegister;
  59                 this.repositoryFactory = repositoryFactory;
  60                 this.jcrKeyring = jcrKeyring;
  61         }
  62
  63         /**
  64          * Override normal behavior to initialize the various repositories only at
  65          * request time
  66          */
  67         @Override
  68         public synchronized Object[] getChildren() {
  69                 if (isLoaded()) {
  70                         return super.getChildren();
  71                 } else {
  72                         // initialize current object
  73                         Map<String, Repository> refRepos = repositoryRegister
  74                                         .getRepositories();
  75                         for (String name : refRepos.keySet()) {
  76                                 super.addChild(new RepositoryNode(name, refRepos.get(name),
  77                                                 this));
  78                         }
  79
  80                         // remote
  81                         if (jcrKeyring != null) {
  82                                 try {
  83                                         addRemoteRepositories(jcrKeyring);
  84                                 } catch (RepositoryException e) {
  85                                         throw new ArgeoException(
  86                                                         "Cannot browse remote repositories", e);
  87                                 }
  88                         }
  89                         return super.getChildren();
  90                 }
  91         }
  92
  93         protected void addRemoteRepositories(JcrKeyring jcrKeyring)
  94                         throws RepositoryException {
  95                 Session userSession = jcrKeyring.getSession();
  96                 Node userHome = JcrUtils.getUserHome(userSession);
  97                 if (userHome != null && userHome.hasNode(ARGEO_REMOTE)) {
  98                         NodeIterator it = userHome.getNode(ARGEO_REMOTE).getNodes();
  99                         while (it.hasNext()) {
 100                                 Node remoteNode = it.nextNode();
 101                                 String uri = remoteNode.getProperty(ARGEO_URI).getString();
 102                                 try {
 103                                         Hashtable<String, String> params = new Hashtable<String, String>();
 104                                         params.put(ArgeoJcrConstants.JCR_REPOSITORY_URI, uri);
 105                                         params.put(ArgeoJcrConstants.JCR_REPOSITORY_ALIAS,
 106                                                         remoteNode.getName());
 107                                         Repository repository = repositoryFactory
 108                                                         .getRepository(params);
 109                                         RemoteRepositoryNode remoteRepositoryNode = new RemoteRepositoryNode(
 110                                                         remoteNode.getName(), repository, this, jcrKeyring,
 111                                                         remoteNode.getPath());
 112                                         super.addChild(remoteRepositoryNode);
 113                                 } catch (Exception e) {
 114                                         ErrorFeedback.show("Cannot add remote repository "
 115                                                         + remoteNode, e);
 116                                 }
 117                         }
 118                 }
 119         }
 120
 121         public void registerNewRepository(String alias, Repository repository) {
 122                 // TODO: implement this
 123                 // Create a new RepositoryNode Object
 124                 // add it
 125                 // super.addChild(new RepositoriesNode(...));
 126         }
 127
 128         /** Returns the {@link RepositoryRegister} wrapped by this object. */
 129         public RepositoryRegister getRepositoryRegister() {
 130                 return repositoryRegister;
 131         }
 132 }