EnvironmentVariableResolver


1   /*******************************************************************************
2    * Copyright (c) 2000, 2005 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    * 
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  
12  package org.eclipse.debug.internal.core;
13  
14  import java.util.Iterator  ;
15  import java.util.Map  ;
16  
17  import org.eclipse.core.runtime.CoreException;
18  import org.eclipse.core.runtime.IStatus;
19  import org.eclipse.core.runtime.Platform;
20  import org.eclipse.core.runtime.Status;
21  import org.eclipse.core.variables.IDynamicVariable;
22  import org.eclipse.core.variables.IDynamicVariableResolver;
23  import org.eclipse.debug.core.DebugPlugin;
24  import org.eclipse.osgi.service.environment.Constants;
25  
26  /**
27   * Resolves the value of environment variables. 
28   */
29  public class EnvironmentVariableResolver implements IDynamicVariableResolver {
30  
31      /* (non-Javadoc)
32       * @see org.eclipse.core.variables.IDynamicVariableResolver#resolveValue(org.eclipse.core.variables.IDynamicVariable, java.lang.String)
33       */
34      public String   resolveValue(IDynamicVariable variable, String   argument) throws CoreException {
35          if (argument == null) {
36              throw new CoreException(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), IStatus.ERROR, DebugCoreMessages.EnvironmentVariableResolver_0, null)); 
37          }
38          Map   map= DebugPlugin.getDefault().getLaunchManager().getNativeEnvironmentCasePreserved();
39          String   value= (String  ) map.get(argument);
40          if (value == null && Platform.getOS().equals(Constants.OS_WIN32)) {
41              // On Win32, env variables are case insensitive, so we search the map
42              // for matches manually.
43              Iterator   iter = map.entrySet().iterator();
44              while (iter.hasNext()) {
45                  Map.Entry   entry= ((Map.Entry  ) iter.next());
46                  String   key= (String  ) entry.getKey();
47                  if (key.equalsIgnoreCase(argument)) {
48                      return (String  ) entry.getValue();
49                  }
50              }
51          }
52          return value;
53      }
54  
55  }
56
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