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From d...@apache.org
Subject cvs commit: jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/util ReplaceTag.java
Date Sat, 16 Nov 2002 10:15:46 GMT
dion        2002/11/16 02:15:46

  Modified:    jelly/src/test/org/apache/commons/jelly/util suite.jelly
  Added:       jelly/src/java/org/apache/commons/jelly/tags/util
                        ReplaceTag.java
  Log:
  Add a replace tag and some tests
  
  Revision  Changes    Path
  1.4       +20 -0     jakarta-commons-sandbox/jelly/src/test/org/apache/commons/jelly/util/suite.jelly
  
  Index: suite.jelly
  ===================================================================
  RCS file: /home/cvs/jakarta-commons-sandbox/jelly/src/test/org/apache/commons/jelly/util/suite.jelly,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- suite.jelly	13 Nov 2002 12:59:35 -0000	1.3
  +++ suite.jelly	16 Nov 2002 10:15:45 -0000	1.4
  @@ -80,5 +80,25 @@
   		</util:available>
   		
     </test:case>
  +  
  +  <test:case name="testReplace">
  +    
  +    <util:replace oldChar="\" newChar="/" var="testString">A\B</util:replace>
  +    <test:assertEquals expected="A/B" actual="${testString}">
  +      Should have replaced a back slash with a forward one
  +    </test:assertEquals>
  +    
  +    <j:set var="testString2"><util:replace oldChar="\" newChar="/">A\B</util:replace></j:set>
  +    <test:assertEquals expected="A/B" actual="${testString2}">
  +      Should have replaced a back slash with a forward one
  +      and placed the result into output
  +    </test:assertEquals>
  +    
  +    <util:replace oldChar="/" newChar="\" value="${testString}" var="testString3" />
  +    <test:assertEquals expected="A\B" actual="${testString3}">
  +      Should have replaced a slash with a back slash from a variable
  +      and placed the result into a variable
  +    </test:assertEquals>
  +  </test:case>
   	
   </test:suite>
  
  
  
  1.1                  jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/util/ReplaceTag.java
  
  Index: ReplaceTag.java
  ===================================================================
  /*
   *
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002 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 acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Tomcat", 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 names without prior written
   *    permission of the Apache Group.
   *
   * 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.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.commons.jelly.tags.util;
  
  import org.apache.commons.jelly.expression.Expression;
  import org.apache.commons.jelly.MissingAttributeException;
  import org.apache.commons.jelly.TagSupport;
  import org.apache.commons.jelly.XMLOutput;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  
  /**
   * A tag that replaces occurrences of strings in its body (or value)
   * and places the result into the context
   * 
   * @author dion
   */
  public class ReplaceTag extends TagSupport {
      /** The Log to which logging calls will be made. */
      private static final Log log = LogFactory.getLog(ReplaceTag.class);
      
      /** The variable name to export. */
      private String var;
  
      /** The expression to evaluate. */
      private Expression value;
  
      /** the old character to be replaced */
      private String oldChar;
      
      /** the new character that will replace the old */
      private String newChar;
      
      // Tag interface
      //------------------------------------------------------------------------- 
      public void doTag(XMLOutput output) throws Exception {
          // check required properties
          if (oldChar == null) {
              throw new MissingAttributeException("oldChar must be provided");
          }
          if (newChar == null) {
              throw new MissingAttributeException("newChar must be provided");
          }
          
          // get either the value or the body of the tag
          Object answer = null;
          if ( value != null ) {
              answer = value.evaluate(context);
          } else {
              answer = getBodyText(false);
          }
          
          // set the result in the context, or output it
          if (answer != null) {
              String stringAnswer = answer.toString().replace(oldChar.charAt(0),
                  newChar.charAt(0));
              if ( var != null ) {
                  context.setVariable(var, stringAnswer);
              } else {
                  output.write(stringAnswer);
              }
          }
      }
      
      /**
       * Returns the newChar used in replacing. Should only be a single
       * character.
       * @return String
       */
      public String getNewChar()
      {
          return newChar;
      }
  
      /**
       * Returns the oldChar that will be replaced. Should only be a single
       * character.
       * @return String
       */
      public String getOldChar()
      {
          return oldChar;
      }
  
      /**
       * Returns the value.
       * @return Expression
       */
      public Expression getValue()
      {
          return value;
      }
  
      /**
       * Returns the var.
       * @return String
       */
      public String getVar()
      {
          return var;
      }
  
      /**
       * Sets the newChar.
       * @param newChar The newChar to set
       */
      public void setNewChar(String newChar)
      {
          this.newChar = newChar;
      }
  
      /**
       * Sets the oldChar.
       * @param oldChar The oldChar to set
       */
      public void setOldChar(String oldChar)
      {
          this.oldChar = oldChar;
      }
  
      /**
       * Sets the value.
       * @param value The value to set
       */
      public void setValue(Expression value)
      {
          this.value = value;
      }
  
      /**
       * Sets the var.
       * @param var The var to set
       */
      public void setVar(String var)
      {
          this.var = var;
      }
  
  }
  
  

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