org.argeo.slc.client.rap/src/main/java/org/argeo/slc/client/ui/specific/OpenJcrFile.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.slc.client.ui.specific;
  17
  18 import java.net.URL;
  19 import java.util.UUID;
  20
  21 import javax.jcr.Node;
  22 import javax.jcr.Session;
  23
  24 import org.argeo.slc.SlcException;
  25 import org.argeo.slc.client.rap.OpenJcrFileService;
  26 import org.argeo.slc.client.rap.SlcRapPlugin;
  27 import org.argeo.slc.repo.RepoService;
  28 import org.eclipse.core.commands.AbstractHandler;
  29 import org.eclipse.core.commands.ExecutionEvent;
  30 import org.eclipse.core.commands.ExecutionException;
  31 import org.eclipse.rwt.RWT;
  32 import org.eclipse.rwt.service.IServiceHandler;
  33 import org.eclipse.rwt.service.IServiceManager;
  34 import org.eclipse.ui.PlatformUI;
  35
  36 /**
  37  * Rap specific command handler to open a file retrieved from a distant JCR
  38  * Repository. It creates and register a service instantiated with the
  39  * corresponding JCR node, forwards the request, and un register the service on
  40  * dispose
  41  *
  42  * This command and the corresponding service are specific for RAP version [1.3,
  43  * 2)
  44  */
  45 public class OpenJcrFile extends AbstractHandler {
  46
  47         // Use (new OpenJcrFileCmdId()).getCmdId() instead.
  48         // public final String ID = SlcRapPlugin.PLUGIN_ID + ".openJcrFile";
  49
  50         public final static String PARAM_REPO_NODE_PATH = "param.repoNodePath";
  51         public final static String PARAM_REPO_URI = "param.repoUri";
  52         public final static String PARAM_WORKSPACE_NAME = "param.workspaceName";
  53         public final static String PARAM_FILE_PATH = "param.filePath";
  54
  55         private RepoService repoService;
  56         private String currentServiceId;
  57
  58         public Object execute(ExecutionEvent event) throws ExecutionException {
  59
  60                 String repoNodePath = event.getParameter(PARAM_REPO_NODE_PATH);
  61                 String repoUri = event.getParameter(PARAM_REPO_URI);
  62                 String wkspName = event.getParameter(PARAM_WORKSPACE_NAME);
  63                 String filePath = event.getParameter(PARAM_FILE_PATH);
  64
  65                 // TODO sanity check
  66                 if (filePath == null || "".equals(filePath.trim()))
  67                         return null;
  68                 Session businessSession = null;
  69                 try {
  70                         businessSession = repoService.getRemoteSession(repoNodePath,
  71                                         repoUri, wkspName);
  72                         Node result = businessSession.getNode(filePath);
  73
  74                         // Create a temporary service. No better solution has been found
  75                         // yet.
  76                         currentServiceId = UUID.randomUUID().toString();
  77                         OpenJcrFileService ojfs = new OpenJcrFileService(result);
  78                         IServiceManager manager = RWT.getServiceManager();
  79                         manager.registerServiceHandler(currentServiceId, ojfs);
  80                         String urlStr = createFullDownloadUrl(currentServiceId);
  81                         URL url = new URL(urlStr);
  82                         PlatformUI.getWorkbench().getBrowserSupport()
  83                                         .createBrowser("DownloadDialog").openURL(url);
  84                 } catch (Exception e) {
  85                         throw new SlcException("Unable to open Jcr File for path "
  86                                         + filePath, e);
  87                 }
  88
  89                 return null;
  90         }
  91
  92         @Override
  93         public void dispose() {
  94                 IServiceManager manager = RWT.getServiceManager();
  95                 manager.unregisterServiceHandler(currentServiceId);
  96                 super.dispose();
  97         }
  98
  99         private String createFullDownloadUrl(String serviceId) {
 100                 StringBuilder url = new StringBuilder();
 101                 url.append(RWT.getRequest().getRequestURL());
 102
 103                 StringBuilder params = new StringBuilder();
 104                 params.append("?");
 105                 params.append(IServiceHandler.REQUEST_PARAM).append("=");
 106                 params.append(serviceId);
 107                 String encodedURL = RWT.getResponse().encodeURL(params.toString());
 108                 url.append(encodedURL);
 109                 return url.toString();
 110         }
 111
 112         /* Dependency Injection */
 113         public void setRepoService(RepoService repoService) {
 114                 this.repoService = repoService;
 115         }
 116 }