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Java > Open Source Codes > com > sun > org > apache > xalan > internal > xsltc > util > JavaCupRedirect


1 /*
2  * @(#)$Id: JavaCupRedirect.java,v 1.2 2003/01/27 18:44:55 mkwan Exp $
3  *
4  * The Apache Software License, Version 1.1
5  *
6  *
7  * Copyright (c) 2001-2003 The Apache Software Foundation. All rights
8  * reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  *
14  * 1. Redistributions of source code must retain the above copyright
15  * notice, this list of conditions and the following disclaimer.
16  *
17  * 2. Redistributions in binary form must reproduce the above copyright
18  * notice, this list of conditions and the following disclaimer in
19  * the documentation and/or other materials provided with the
20  * distribution.
21  *
22  * 3. The end-user documentation included with the redistribution,
23  * if any, must include the following acknowledgment:
24  * "This product includes software developed by the
25  * Apache Software Foundation (http://www.apache.org/)."
26  * Alternately, this acknowledgment may appear in the software itself,
27  * if and wherever such third-party acknowledgments normally appear.
28  *
29  * 4. The names "Xalan" and "Apache Software Foundation" must
30  * not be used to endorse or promote products derived from this
31  * software without prior written permission. For written
32  * permission, please contact apache@apache.org.
33  *
34  * 5. Products derived from this software may not be called "Apache",
35  * nor may "Apache" appear in their name, without prior written
36  * permission of the Apache Software Foundation.
37  *
38  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
39  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
40  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
41  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
44  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
45  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
46  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
47  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
48  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49  * SUCH DAMAGE.
50  * ====================================================================
51  *
52  * This software consists of voluntary contributions made by many
53  * individuals on behalf of the Apache Software Foundation and was
54  * originally based on software copyright (c) 2001, Sun
55  * Microsystems., http://www.sun.com. For more
56  * information on the Apache Software Foundation, please see
57  * <http://www.apache.org/>.
58  */

59
60 package com.sun.org.apache.xalan.internal.xsltc.util;
61
62 import java.io.FileInputStream JavaDoc;
63 import java.io.FileNotFoundException JavaDoc;
64 import java.io.InputStream JavaDoc;
65
66 /**
67  * Utility class to redirect input to JavaCup program.
68  *
69  * Usage-command line:
70  * <code>java com.sun.org.apache.xalan.internal.xsltc.utils.JavaCupRedirect [args] -stdin filename.ext</code>
71  *
72  * @author Morten Jorgensen
73  * @version $Id: JavaCupRedirect.java,v 1.2 2003/01/27 18:44:55 mkwan Exp $
74  */

75 public class JavaCupRedirect {
76
77     private final static String JavaDoc ERRMSG =
78          "You must supply a filename with the -stdin option.";
79
80     public static void _main (String JavaDoc args[]) {
81
82          // If we should call System.exit or not
83
//@todo make this settable for use inside other java progs
84
boolean systemExitOK = true;
85
86          // This is the stream we'll set as our System.in
87
InputStream JavaDoc input = null;
88
89          // The number of arguments
90
final int argc = args.length;
91
92          // The arguments we'll pass to the real '_main()'
93
String JavaDoc[] new_args = new String JavaDoc[argc - 2];
94          int new_argc = 0;
95
96          // Parse all parameters passed to this class
97
for (int i = 0; i < argc; i++) {
98              // Parse option '-stdin <filename>'
99
if (args[i].equals("-stdin")) {
100                  // This option must have an argument
101
if ((++i >= argc) || (args[i].startsWith("-"))) {
102                      System.err.println(ERRMSG);
103                      doSystemExit(systemExitOK);
104                  }
105                  try {
106                      input = new FileInputStream JavaDoc(args[i]);
107                  }
108                  catch (FileNotFoundException JavaDoc e) {
109                      System.err.println("Could not open file "+args[i]);
110                      doSystemExit(systemExitOK);
111                  }
112                  catch (SecurityException JavaDoc e) {
113                      System.err.println("No permission to file "+args[i]);
114                      doSystemExit(systemExitOK);
115                  }
116              }
117              else {
118                  if (new_argc == new_args.length) {
119                      System.err.println("Missing -stdin option!");
120                      doSystemExit(systemExitOK);
121                  }
122                  new_args[new_argc++] = args[i];
123              }
124          }
125
126          System.setIn(input);
127          try {
128              com.sun.java_cup.internal.Main.main(new_args);
129          }
130          catch (Exception JavaDoc e) {
131              System.err.println("Error running JavaCUP:");
132              e.printStackTrace();
133              doSystemExit(systemExitOK);
134          }
135     }
136     public static void doSystemExit (boolean doExit) {
137         if (doExit)
138             System.exit(-1);
139     }
140 }
141
142
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