legacy/argeo-commons/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/legacy/rap/OpenFile.java

   1 package org.argeo.cms.ui.workbench.legacy.rap;
   2
   3 import org.argeo.api.cms.CmsLog;
   4 import org.eclipse.core.commands.AbstractHandler;
   5 import org.eclipse.core.commands.ExecutionEvent;
   6 import org.eclipse.rap.rwt.RWT;
   7 import org.eclipse.rap.rwt.client.service.UrlLauncher;
   8
   9 /**
  10  * RWT specific object to open a file retrieved from the server. It forwards the
  11  * request to the correct service after encoding file name and path in the
  12  * request URI.
  13  *
  14  * <p>
  15  * The parameter "URI" is used to determine the correct file service, the path
  16  * and the file name. An optional file name can be added to present the end user
  17  * with a different file name as the one used to retrieve it.
  18  * </p>
  19  *
  20  *
  21  * <p>
  22  * The instance specific service is called by its ID and must have been
  23  * externally created
  24  * </p>
  25  */
  26 public class OpenFile extends AbstractHandler {
  27         private final static CmsLog log = CmsLog.getLog(OpenFile.class);
  28
  29         public final static String ID = SingleSourcingConstants.OPEN_FILE_CMD_ID;
  30         public final static String PARAM_FILE_NAME = SingleSourcingConstants.PARAM_FILE_NAME;
  31         public final static String PARAM_FILE_URI = SingleSourcingConstants.PARAM_FILE_URI;;
  32
  33         /* DEPENDENCY INJECTION */
  34         private String openFileServiceId;
  35
  36         public Object execute(ExecutionEvent event) {
  37                 String fileName = event.getParameter(PARAM_FILE_NAME);
  38                 String fileUri = event.getParameter(PARAM_FILE_URI);
  39                 // Sanity check
  40                 if (fileUri == null || "".equals(fileUri.trim()) || openFileServiceId == null
  41                                 || "".equals(openFileServiceId.trim()))
  42                         return null;
  43
  44                 org.argeo.cms.ui.workbench.legacy.rap.OpenFile openFileClient = new org.argeo.cms.ui.workbench.legacy.rap.OpenFile();
  45                 openFileClient.execute(openFileServiceId, fileUri, fileName);
  46                 return null;
  47         }
  48
  49         public Object execute(String openFileServiceId, String fileUri, String fileName) {
  50                 StringBuilder url = new StringBuilder();
  51                 url.append(RWT.getServiceManager().getServiceHandlerUrl(openFileServiceId));
  52
  53                 if (notEmpty(fileName))
  54                         url.append("&").append(SingleSourcingConstants.PARAM_FILE_NAME).append("=").append(fileName);
  55                 url.append("&").append(SingleSourcingConstants.PARAM_FILE_URI).append("=").append(fileUri);
  56
  57                 String downloadUrl = url.toString();
  58                 if (log.isTraceEnabled())
  59                         log.trace("Calling OpenFileService with ID: " + openFileServiceId + " , with download URL: " + downloadUrl);
  60
  61                 UrlLauncher launcher = RWT.getClient().getService(UrlLauncher.class);
  62                 launcher.openURL(downloadUrl);
  63                 return null;
  64         }
  65
  66         /* DEPENDENCY INJECTION */
  67         public void setOpenFileServiceId(String openFileServiceId) {
  68                 this.openFileServiceId = openFileServiceId;
  69         }
  70
  71         /** Simply checks if a string is not null nor empty */
  72         public static boolean notEmpty(String stringToTest) {
  73                 return !(stringToTest == null || "".equals(stringToTest.trim()));
  74         }
  75
  76         /** Simply checks if a string is null or empty */
  77         public static boolean isEmpty(String stringToTest) {
  78                 return stringToTest == null || "".equals(stringToTest.trim());
  79         }
  80
  81 }