base/runtime/org.argeo.eclipse.ui.rcp/src/main/java/org/argeo/eclipse/ui/specific/OpenFile.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.eclipse.ui.specific;
  17
  18 import java.awt.Desktop;
  19 import java.io.File;
  20 import java.io.IOException;
  21
  22 import org.argeo.ArgeoException;
  23 import org.eclipse.core.commands.AbstractHandler;
  24 import org.eclipse.core.commands.ExecutionEvent;
  25 import org.eclipse.core.commands.ExecutionException;
  26
  27 /**
  28  * RCP specific command handler to open a file.
  29  *
  30  * The parameter "URI" is used to determine the correct method to open it.
  31  *
  32  * Various instances of this handler with different command ID might coexist in
  33  * order to provide context specific open file service.
  34  *
  35  */
  36 public class OpenFile extends AbstractHandler {
  37         // private final static Log log = LogFactory.getLog(OpenFile.class);
  38
  39         public final static String PARAM_FILE_NAME = "param.fileName";
  40         public final static String PARAM_FILE_URI = "param.fileURI";
  41
  42         private final static String FILE_SCHEME = "file";
  43
  44         public Object execute(ExecutionEvent event) throws ExecutionException {
  45                 @SuppressWarnings("unused")
  46                 @Deprecated
  47                 String fileName = event.getParameter(PARAM_FILE_NAME);
  48                 String fileUri = event.getParameter(PARAM_FILE_URI);
  49
  50                 // sanity check
  51                 if (fileUri == null || "".equals(fileUri.trim()))
  52                         return null;
  53
  54                 Desktop desktop = null;
  55                 if (Desktop.isDesktopSupported()) {
  56                         desktop = Desktop.getDesktop();
  57                 }
  58
  59                 File file = getFileFromUri(fileUri);
  60                 if (file != null)
  61                         try {
  62                                 desktop.open(file);
  63                         } catch (IOException e) {
  64                                 throw new ArgeoException("Unable to open file with URI: "
  65                                                 + fileUri, e);
  66                         }
  67
  68                 return null;
  69         }
  70
  71         protected File getFileFromUri(String uri) {
  72                 if (uri.startsWith(FILE_SCHEME)) {
  73                         String path = uri.substring((FILE_SCHEME + "://").length());
  74                         return new File(path);
  75                 }
  76                 return null;
  77         }
  78 }