cvs commit: jakarta-log4j/src/java/org/apache/log4j/helpers Transform.java

[ce...@apache.org]

ceki        02/04/26 05:31:42

  Added:       src/java/org/apache/log4j/helpers Transform.java
  Log:
  Missing file.
  
  Revision  Changes    Path
  1.1                  jakarta-log4j/src/java/org/apache/log4j/helpers/Transform.java
  
  Index: Transform.java
  ===================================================================
  /*
   * Copyright (C) The Apache Software Foundation. All rights reserved.
   *
   * This software is published under the terms of the Apache Software
   * License version 1.1, a copy of which has been included with this
   * distribution in the LICENSE.txt file.  */
  
  package org.apache.log4j.helpers;
  
  import org.apache.log4j.spi.LoggingEvent;
  import org.apache.log4j.spi.LocationInfo;
  
  /**
     Utility class for transforming strings.
   */
  public class Transform {
  
    /**
     * This method takes a string which may contain HTML tags (ie, <b>, <table>,
     * etc) and converts the '<' and '>' characters to their HTML escape
     * sequences.
     *
     * @param input The text to be converted.
     * @return The input string with the characters '<' and '>' replaced with
     *  &lt; and &gt; respectively.
     */
    static 
    public 
    String escapeTags(String input) {
      //Check if the string is null or zero length -- if so, return
      //what was sent in.
  
      if( input == null || input.length() == 0 ) {
        return input;
      }
  
      //Use a StringBuffer in lieu of String concatenation -- it is
      //much more efficient this way.
  
      StringBuffer buf = new StringBuffer(input.length() + 6);
      char ch = ' ';
  
      int len = input.length();
      for(int i=0; i < len; i++) {
        ch = input.charAt(i);
        if(ch == '<') {
  	buf.append("&lt;");
        } else if(ch == '>') {
  	buf.append("&gt;");
        } else {
  	buf.append(ch);
        }
      }
      return buf.toString();
    }
  }
  
  
  

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