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.RepositoryRegister;
  34 import org.argeo.jcr.UserJcrUtils;
  35 import org.argeo.util.security.Keyring;
  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         /**
  53          * A session of the logged in user on the default workspace of the node
  54          * repository.
  55          */
  56         private final Session userSession;
  57         private final Keyring keyring;
  58
  59         public RepositoriesNode(String name, RepositoryRegister repositoryRegister,
  60                         RepositoryFactory repositoryFactory, TreeParent parent,
  61                         Session userSession, Keyring keyring) {
  62                 super(name);
  63                 this.repositoryRegister = repositoryRegister;
  64                 this.repositoryFactory = repositoryFactory;
  65                 this.userSession = userSession;
  66                 this.keyring = keyring;
  67         }
  68
  69         /**
  70          * Override normal behavior to initialize the various repositories only at
  71          * request time
  72          */
  73         @Override
  74         public synchronized Object[] getChildren() {
  75                 if (isLoaded()) {
  76                         return super.getChildren();
  77                 } else {
  78                         // initialize current object
  79                         Map<String, Repository> refRepos = repositoryRegister
  80                                         .getRepositories();
  81                         for (String name : refRepos.keySet()) {
  82                                 super.addChild(new RepositoryNode(name, refRepos.get(name),
  83                                                 this));
  84                         }
  85
  86                         // remote
  87                         if (keyring != null) {
  88                                 try {
  89                                         addRemoteRepositories(keyring);
  90                                 } catch (RepositoryException e) {
  91                                         throw new ArgeoException(
  92                                                         "Cannot browse remote repositories", e);
  93                                 }
  94                         }
  95                         return super.getChildren();
  96                 }
  97         }
  98
  99         protected void addRemoteRepositories(Keyring jcrKeyring)
 100                         throws RepositoryException {
 101                 Node userHome = UserJcrUtils.getUserHome(userSession);
 102                 if (userHome != null && userHome.hasNode(ARGEO_REMOTE)) {
 103                         NodeIterator it = userHome.getNode(ARGEO_REMOTE).getNodes();
 104                         while (it.hasNext()) {
 105                                 Node remoteNode = it.nextNode();
 106                                 String uri = remoteNode.getProperty(ARGEO_URI).getString();
 107                                 try {
 108                                         Hashtable<String, String> params = new Hashtable<String, String>();
 109                                         params.put(ArgeoJcrConstants.JCR_REPOSITORY_URI, uri);
 110                                         params.put(ArgeoJcrConstants.JCR_REPOSITORY_ALIAS,
 111                                                         remoteNode.getName());
 112                                         Repository repository = repositoryFactory
 113                                                         .getRepository(params);
 114                                         RemoteRepositoryNode remoteRepositoryNode = new RemoteRepositoryNode(
 115                                                         remoteNode.getName(), repository, this,
 116                                                         userSession, jcrKeyring, remoteNode.getPath());
 117                                         super.addChild(remoteRepositoryNode);
 118                                 } catch (Exception e) {
 119                                         ErrorFeedback.show("Cannot add remote repository "
 120                                                         + remoteNode, e);
 121                                 }
 122                         }
 123                 }
 124         }
 125
 126         public void registerNewRepository(String alias, Repository repository) {
 127                 // TODO: implement this
 128                 // Create a new RepositoryNode Object
 129                 // add it
 130                 // super.addChild(new RepositoriesNode(...));
 131         }
 132
 133         /** Returns the {@link RepositoryRegister} wrapped by this object. */
 134         public RepositoryRegister getRepositoryRegister() {
 135                 return repositoryRegister;
 136         }
 137 }