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 020package org.apache.james.mime4j.field; 021 022import java.io.StringReader; 023import java.util.ArrayList; 024import java.util.Collections; 025import java.util.List; 026 027import org.apache.james.mime4j.codec.DecodeMonitor; 028import org.apache.james.mime4j.dom.FieldParser; 029import org.apache.james.mime4j.dom.field.ContentLanguageField; 030import org.apache.james.mime4j.field.language.parser.ContentLanguageParser; 031import org.apache.james.mime4j.field.language.parser.ParseException; 032import org.apache.james.mime4j.stream.Field; 033 034/** 035 * Represents a <code>Content-Transfer-Encoding</code> field. 036 */ 037public class ContentLanguageFieldImpl extends AbstractField implements ContentLanguageField { 038 039 private boolean parsed = false; 040 private List<String> languages; 041 private ParseException parseException; 042 043 ContentLanguageFieldImpl(Field rawField, DecodeMonitor monitor) { 044 super(rawField, monitor); 045 } 046 047 private void parse() { 048 parsed = true; 049 languages = Collections.<String>emptyList(); 050 String body = getBody(); 051 if (body != null) { 052 ContentLanguageParser parser = new ContentLanguageParser(new StringReader(body)); 053 try { 054 languages = parser.parse(); 055 } catch (ParseException ex) { 056 parseException = ex; 057 } 058 } 059 } 060 061 @Override 062 public org.apache.james.mime4j.dom.field.ParseException getParseException() { 063 return parseException; 064 } 065 066 public List<String> getLanguages() { 067 if (!parsed) { 068 parse(); 069 } 070 return new ArrayList<String>(languages); 071 } 072 073 public static final FieldParser<ContentLanguageField> PARSER = new FieldParser<ContentLanguageField>() { 074 075 public ContentLanguageField parse(final Field rawField, final DecodeMonitor monitor) { 076 return new ContentLanguageFieldImpl(rawField, monitor); 077 } 078 079 }; 080 081} 082