001 /**************************************************************** 002 * Licensed to the Apache Software Foundation (ASF) under one * 003 * or more contributor license agreements. See the NOTICE file * 004 * distributed with this work for additional information * 005 * regarding copyright ownership. The ASF licenses this file * 006 * to you under the Apache License, Version 2.0 (the * 007 * "License"); you may not use this file except in compliance * 008 * with the License. You may obtain a copy of the License at * 009 * * 010 * http://www.apache.org/licenses/LICENSE-2.0 * 011 * * 012 * Unless required by applicable law or agreed to in writing, * 013 * software distributed under the License is distributed on an * 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * 015 * KIND, either express or implied. See the License for the * 016 * specific language governing permissions and limitations * 017 * under the License. * 018 ****************************************************************/ 019 020 package org.apache.james.mime4j.field; 021 022 import java.util.HashMap; 023 import java.util.Map; 024 025 import org.apache.james.mime4j.util.ByteSequence; 026 027 public class DelegatingFieldParser implements FieldParser { 028 029 private Map<String, FieldParser> parsers = new HashMap<String, FieldParser>(); 030 private FieldParser defaultParser = UnstructuredField.PARSER; 031 032 /** 033 * Sets the parser used for the field named <code>name</code>. 034 * @param name the name of the field 035 * @param parser the parser for fields named <code>name</code> 036 */ 037 public void setFieldParser(final String name, final FieldParser parser) { 038 parsers.put(name.toLowerCase(), parser); 039 } 040 041 public FieldParser getParser(final String name) { 042 final FieldParser field = parsers.get(name.toLowerCase()); 043 if(field==null) { 044 return defaultParser; 045 } 046 return field; 047 } 048 049 public ParsedField parse(final String name, final String body, final ByteSequence raw) { 050 final FieldParser parser = getParser(name); 051 return parser.parse(name, body, raw); 052 } 053 }