package org.apache.fulcrum.parser;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import java.net.URLDecoder;

 import java.util.StringTokenizer;

 /**

  * An extension that parses a String for name/value pairs.

  *

  * @author <a href="mailto:jmcnally@collab.net">John McNally</a>

  * @version $Id: StringValueParser.java 670329 2008-06-22 09:35:12Z tv $

  */

 public class StringValueParser

     extends BaseValueParser

 {

     /**

      * Parses a String using a single delimiter.

      *

      * @param s a <code>String</code> value

      * @param delim a <code>char</code> value

      * @param urlDecode a <code>boolean</code> value

      * @exception Exception Error decoding name/value pairs.

      */

     public void parse(String s, char delim, boolean urlDecode)

         throws Exception

     {

         String delimChar = String.valueOf(delim);

         StringTokenizer st = new StringTokenizer(s, delimChar);

         boolean isNameTok = true;

         String pathPart = null;

         String key = null;

         while (st.hasMoreTokens())

         {

             String tok = st.nextToken();

             if ( urlDecode )

             {

                 tok = URLDecoder.decode(tok, getCharacterEncoding());

             }

             if (isNameTok)

             {

                 key = tok;

                 isNameTok = false;

             }

             else

             {

                 pathPart = tok;

                 if (key != null && key.length() > 0)

                 {

                     add (convert(key), pathPart);

                 }

                 isNameTok = true;

             }

         }

     }

     public void parse(String s, char paramDelim, char pairDelim,

                       boolean urlDecode)

         throws Exception

     {

         if ( paramDelim == pairDelim )

         {

             parse(s, paramDelim, urlDecode);

         }

         else

         {

             String delimChar = String.valueOf(paramDelim);

             StringTokenizer st = new StringTokenizer(s, delimChar);

             while (st.hasMoreTokens())

             {

                 String pair = st.nextToken();

                 int pos = pair.indexOf(pairDelim);

                 String name = pair.substring(0, pos);

                 String value = pair.substring(pos+1);

                 if ( urlDecode )

                 {

                     name = URLDecoder.decode(name, getCharacterEncoding());

                     value = URLDecoder.decode(value, getCharacterEncoding());

                 }

                 if (name.length() > 0)

                 {

                     add (convert(name), value);

                 }

             }

         }

     }

 }