cvs commit: cocoon-lenya/src/java/org/apache/lenya/util SED.java

[mi...@apache.org]

michi       2004/01/18 04:22:42

  Added:       src/java/org/apache/lenya/util SED.java
  Log:
  utility class similiar to UNIX sed added
  
  Revision  Changes    Path
  1.1                  cocoon-lenya/src/java/org/apache/lenya/util/SED.java
  
  Index: SED.java
  ===================================================================
  /*
  <License>
  
   ============================================================================
                     The Apache Software License, Version 1.1
   ============================================================================
  
   Copyright (C) 1999-2004 The Apache Software Foundation. All rights reserved.
  
   Redistribution and use in source and binary forms, with or without modifica-
   tion, 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 "Apache Lenya" 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 (INCLU-
   DING, 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 created by
   Michael Wechner <mi...@apache.org>. For more information on the Apache Soft-
   ware Foundation, please see <http://www.apache.org/>.
  
   Lenya includes software developed by the Apache Software Foundation, W3C,
   DOM4J Project, and WebSHPINX.
  </License>
  */
  package org.apache.lenya.util;
  
  import org.apache.log4j.Category;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.PrintStream;
  
  import java.nio.CharBuffer;
  import java.nio.MappedByteBuffer;
  import java.nio.channels.FileChannel;
  import java.nio.charset.Charset;
  import java.nio.charset.CharsetDecoder;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * Similar to the UNIX sed
   *
   * @author Michael Wechner
   * @version $Id: SED.java,v 1.1 2004/01/18 12:22:41 michi Exp $
   */
  public class SED {
      static Category log = Category.getInstance(SED.class);
  
      /**
       * Command Line Interface
       *
       * @param args DOCUMENT ME!
       */
      public static void main(String[] args) {
          if (args.length == 0) {
              System.out.println("Usage: org.apache.lenya.util.SED");
              return;
          }
      }
  
      /**
       * Substitute prefix, e.g. ".*world.*" by "universe"
       *
       * @param file File which sed shall be applied
       * @param prefixSubstitute Prefix which shall be replaced
       * @param substituteReplacement Prefix which is going to replace the original
       *
       * @throws IOException DOCUMENT ME!
       */
      public static void replaceAll(File file, String substitute, String substituteReplacement) throws IOException {
          log.debug("Replace " + substitute + " by " + substituteReplacement);
  
          Pattern pattern = Pattern.compile(substitute);
  
          // Open the file and then get a channel from the stream
          FileInputStream fis = new FileInputStream(file);
          FileChannel fc = fis.getChannel();
  
          // Get the file's size and then map it into memory
          int sz = (int)fc.size();
          MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, sz);
  
  	// Decode the file into a char buffer
          // Charset and decoder for ISO-8859-15
          Charset charset = Charset.forName("ISO-8859-15");
          CharsetDecoder decoder = charset.newDecoder();
  	CharBuffer cb = decoder.decode(bb);
  
          Matcher matcher = pattern.matcher(cb);
          String outString = matcher.replaceAll(substituteReplacement);
          log.debug(outString);
  
  
          FileOutputStream fos = new FileOutputStream(file.getAbsolutePath());
          PrintStream ps =new PrintStream(fos);
          ps.print(outString);
          ps.close();
          fos.close();
      }
  }
  
  
  

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