InitUtility


1   /*
2    * Copyright (C) 2004 Sun Microsystems, Inc. All rights reserved. Use is
3    * subject to license terms.
4    * 
5    * This program is free software; you can redistribute it and/or modify
6    * it under the terms of the Lesser GNU General Public License as
7    * published by the Free Software Foundation; either version 2 of the
8    * License, or (at your option) any later version.
9    * 
10   * This program is distributed in the hope that it will be useful, but
11   * WITHOUT ANY WARRANTY; without even the implied warranty of
12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   * General Public License for more details.
14   * 
15   * You should have received a copy of the GNU General Public License
16   * along with this program; if not, write to the Free Software
17   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18   * USA.
19   */ 
20  package org.jdesktop.jdic.init;
21  
22  import java.io.File  ;
23  
24  /**
25   * Utility class for JDIC initialization.
26   * @author Paul Huang
27   * @created August 20, 2004
28   */
29  public class InitUtility {
30      static {
31          System.loadLibrary("jdic");
32      }
33      
34      /**
35       * Gets the value of the environment variable.
36       *
37       * @param envVarName The name of the environment variable.
38       * @return The value of the environment variable.
39       */
40      public static native String   getEnv(String   envVarName);
41      
42      /**
43       * Sets the environment variable. 
44       *
45       * @param ennVarName The name of the environment variable.
46       * @param envValue The value to be set.
47       */
48      public static native void setEnv(String   envVarName, String   envValue);
49      
50      /**
51       * Pre-appends the value to the environment variable.
52       *
53       * @param envVarName environment variable name.
54       * @param appendValue new value to be appended.
55       */
56      public static void preAppendEnv(String   envVarName, String   appendValue) {
57          String   originalValue = getEnv(envVarName);
58          String   newValue = appendValue;
59          if (originalValue != null) {
60              newValue = appendValue.concat(File.pathSeparator).concat(originalValue);
61          }
62          setEnv(envVarName, newValue);
63      }
64  }
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