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