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      1 /*
      2  *  Copyright 2006 the mime4j project
      3  *
      4  *  Licensed under the Apache License, Version 2.0 (the "License");
      5  *  you may not use this file except in compliance with the License.
      6  *  You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  *  Unless required by applicable law or agreed to in writing, software
     11  *  distributed under the License is distributed on an "AS IS" BASIS,
     12  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  *  See the License for the specific language governing permissions and
     14  *  limitations under the License.
     15  */
     16 package org.apache.james.mime4j.field;
     17 
     18 import java.util.HashMap;
     19 import java.util.Map;
     20 
     21 public class DelegatingFieldParser implements FieldParser {
     22 
     23     private Map<String, FieldParser> parsers = new HashMap<String, FieldParser>();
     24     private FieldParser defaultParser = new UnstructuredField.Parser();
     25 
     26     /**
     27      * Sets the parser used for the field named <code>name</code>.
     28      * @param name the name of the field
     29      * @param parser the parser for fields named <code>name</code>
     30      */
     31     public void setFieldParser(final String name, final FieldParser parser) {
     32         parsers.put(name.toLowerCase(), parser);
     33     }
     34 
     35     public FieldParser getParser(final String name) {
     36         final FieldParser field = parsers.get(name.toLowerCase());
     37         if(field==null) {
     38             return defaultParser;
     39         }
     40         return field;
     41     }
     42 
     43     public Field parse(final String name, final String body, final String raw) {
     44         final FieldParser parser = getParser(name);
     45         return parser.parse(name, body, raw);
     46     }
     47 }
     48