cvs commit: xml-xalan/java/src/org/apache/xalan/xsltc/util JavaCupRedirect.java

[cu...@apache.org]

curcuru     01/04/24 08:51:29

  Added:       java/src/org/apache/xalan/xsltc/util JavaCupRedirect.java
  Log:
  Utility to switch -stdin filename.ext argument to an input stream;
  used solely to integrate java_cup utility into Ant build script
  
  Revision  Changes    Path
  1.1                  xml-xalan/java/src/org/apache/xalan/xsltc/util/JavaCupRedirect.java
  
  Index: JavaCupRedirect.java
  ===================================================================
  /*
   * @(#)$Id: JavaCupRedirect.java,v 1.1 2001/04/24 15:51:29 curcuru Exp $
   *
   * The Apache Software License, Version 1.1
   *
   *
   * Copyright (c) 2001 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Xalan" and "Apache Software Foundation" must
   *    not be used to endorse or promote products derived from this
   *    software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation and was
   * originally based on software copyright (c) 2001, Sun
   * Microsystems., http://www.sun.com.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  
  package org.apache.xalan.xsltc.util;
  
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.InputStream;
  
  /**
   * Utility class to redirect input to JavaCup program.
   *
   * Usage-command line: 
   * <code>java org.apache.xalan.xsltc.utils.JavaCupRedirect [args] -stdin filename.ext</code>
   *
   * @author Morten Jorgensen
   * @version $Id: JavaCupRedirect.java,v 1.1 2001/04/24 15:51:29 curcuru Exp $
   */
  public class JavaCupRedirect {
  
      private final static String ERRMSG = 
  		 "You must supply a filename with the -stdin option.";
  
      public static void main (String args[]) {
  
  		 // If we should call System.exit or not
           //@todo make this settable for use inside other java progs
  		 boolean systemExitOK = true;
  
  		 // This is the stream we'll set as our System.in
  		 InputStream input = null;
  
  		 // The number of arguments
  		 final int argc = args.length;
  
  		 // The arguments we'll pass to the real 'main()'
  		 String[] new_args = new String[argc - 2];
  		 int new_argc = 0;
  
  		 // Parse all parameters passed to this class
  		 for (int i = 0; i < argc; i++) {
  		     // Parse option '-stdin <filename>'
  		     if (args[i].equals("-stdin")) {
  		 		 // This option must have an argument
  		 		 if ((++i >= argc) || (args[i].startsWith("-"))) {
  		 		     System.err.println(ERRMSG);
  		 		     doSystemExit(systemExitOK);
  		 		 }
  		 		 try {
  		 		     input = new FileInputStream(args[i]);
  		 		 }
  		 		 catch (FileNotFoundException e) {
  		 		     System.err.println("Could not open file "+args[i]);
  		 		     doSystemExit(systemExitOK);
  		 		 }
  		 		 catch (SecurityException e) {
  		 		     System.err.println("No permission to file "+args[i]);
  		 		     doSystemExit(systemExitOK);
  		 		 }
  		     }
  		     else {
  		 		 if (new_argc == new_args.length) {
  		 		     System.err.println("Missing -stdin option!");
  		 		     doSystemExit(systemExitOK);
  		 		 }
  		 		 new_args[new_argc++] = args[i];
  		     }
  		 }
  
  		 System.setIn(input);
  		 try {
  		     java_cup.Main.main(new_args);
  		 }
  		 catch (Exception e) {
  		     System.err.println("Error running JavaCUP:");
  		     e.printStackTrace();
  		     doSystemExit(systemExitOK);
  		 }
      }
      public static void doSystemExit (boolean doExit) {
          if (doExit)
              System.exit(-1);
      }
  }
  
  

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