RepositoriesElem.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.model;
  17
  18 import java.util.Map;
  19
  20 import javax.jcr.Node;
  21 import javax.jcr.NodeIterator;
  22 import javax.jcr.Repository;
  23 import javax.jcr.RepositoryException;
  24 import javax.jcr.RepositoryFactory;
  25 import javax.jcr.Session;
  26
  27 import org.argeo.ArgeoException;
  28 import org.argeo.eclipse.ui.ErrorFeedback;
  29 import org.argeo.eclipse.ui.TreeParent;
  30 import org.argeo.jcr.ArgeoNames;
  31 import org.argeo.jcr.MaintainedRepository;
  32 import org.argeo.jcr.RepositoryRegister;
  33 import org.argeo.jcr.UserJcrUtils;
  34 import org.argeo.util.security.Keyring;
  35
  36 /**
  37  * UI Tree component. Implements the Argeo abstraction of a
  38  * {@link RepositoryFactory} that enable a user to "mount" various repositories
  39  * in a single Tree like View. It is usually meant to be at the root of the UI
  40  * Tree and thus {@link getParent()} method will return null.
  41  *
  42  * The {@link RepositoryFactory} is injected at instantiation time and must be
  43  * use get or register new {@link Repository} objects upon which a reference is
  44  * kept here.
  45  */
  46
  47 public class RepositoriesElem extends TreeParent implements ArgeoNames {
  48         private final RepositoryRegister repositoryRegister;
  49         private final RepositoryFactory repositoryFactory;
  50
  51         /**
  52          * A session of the logged in user on the default workspace of the node
  53          * repository.
  54          */
  55         private final Session userSession;
  56         private final Keyring keyring;
  57
  58         public RepositoriesElem(String name, RepositoryRegister repositoryRegister,
  59                         RepositoryFactory repositoryFactory, TreeParent parent,
  60                         Session userSession, Keyring keyring) {
  61                 super(name);
  62                 this.repositoryRegister = repositoryRegister;
  63                 this.repositoryFactory = repositoryFactory;
  64                 this.userSession = userSession;
  65                 this.keyring = keyring;
  66         }
  67
  68         /**
  69          * Override normal behavior to initialize the various repositories only at
  70          * request time
  71          */
  72         @Override
  73         public synchronized Object[] getChildren() {
  74                 if (isLoaded()) {
  75                         return super.getChildren();
  76                 } else {
  77                         // initialize current object
  78                         Map<String, Repository> refRepos = repositoryRegister
  79                                         .getRepositories();
  80                         for (String name : refRepos.keySet()) {
  81                                 Repository repository = refRepos.get(name);
  82                                 if (repository instanceof MaintainedRepository)
  83                                         super.addChild(new MaintainedRepositoryElem(name,
  84                                                         repository, this));
  85                                 else
  86                                         super.addChild(new RepositoryElem(name, repository, this));
  87                         }
  88
  89                         // remote
  90                         if (keyring != null) {
  91                                 try {
  92                                         addRemoteRepositories(keyring);
  93                                 } catch (RepositoryException e) {
  94                                         throw new ArgeoException(
  95                                                         "Cannot browse remote repositories", e);
  96                                 }
  97                         }
  98                         return super.getChildren();
  99                 }
 100         }
 101
 102         protected void addRemoteRepositories(Keyring jcrKeyring)
 103                         throws RepositoryException {
 104                 Node userHome = UserJcrUtils.getUserHome(userSession);
 105                 if (userHome != null && userHome.hasNode(ARGEO_REMOTE)) {
 106                         NodeIterator it = userHome.getNode(ARGEO_REMOTE).getNodes();
 107                         while (it.hasNext()) {
 108                                 Node remoteNode = it.nextNode();
 109                                 String uri = remoteNode.getProperty(ARGEO_URI).getString();
 110                                 try {
 111                                         RemoteRepositoryElem remoteRepositoryNode = new RemoteRepositoryElem(
 112                                                         remoteNode.getName(), repositoryFactory, uri, this,
 113                                                         userSession, jcrKeyring, remoteNode.getPath());
 114                                         super.addChild(remoteRepositoryNode);
 115                                 } catch (Exception e) {
 116                                         ErrorFeedback.show("Cannot add remote repository "
 117                                                         + remoteNode, e);
 118                                 }
 119                         }
 120                 }
 121         }
 122
 123         public void registerNewRepository(String alias, Repository repository) {
 124                 // TODO: implement this
 125                 // Create a new RepositoryNode Object
 126                 // add it
 127                 // super.addChild(new RepositoriesNode(...));
 128         }
 129
 130         /** Returns the {@link RepositoryRegister} wrapped by this object. */
 131         public RepositoryRegister getRepositoryRegister() {
 132                 return repositoryRegister;
 133         }
 134 }