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.util.ArrayList; 023import java.util.BitSet; 024import java.util.List; 025 026import org.apache.james.mime4j.codec.DecodeMonitor; 027import org.apache.james.mime4j.dom.FieldParser; 028import org.apache.james.mime4j.dom.field.ContentLanguageField; 029import org.apache.james.mime4j.stream.Field; 030import org.apache.james.mime4j.stream.ParserCursor; 031import org.apache.james.mime4j.stream.RawField; 032import org.apache.james.mime4j.stream.RawFieldParser; 033import org.apache.james.mime4j.util.ByteSequence; 034import org.apache.james.mime4j.util.ContentUtil; 035 036/** 037 * Represents a <code>Content-Transfer-Encoding</code> field. 038 */ 039public class ContentLanguageFieldLenientImpl extends AbstractField implements ContentLanguageField { 040 041 private final static int COMMA = ','; 042 private final static BitSet DELIM = RawFieldParser.INIT_BITSET(COMMA); 043 044 private boolean parsed = false; 045 private List<String> languages; 046 047 ContentLanguageFieldLenientImpl(final Field rawField, final DecodeMonitor monitor) { 048 super(rawField, monitor); 049 } 050 051 private void parse() { 052 parsed = true; 053 languages = new ArrayList<String>(); 054 RawField f = getRawField(); 055 ByteSequence buf = f.getRaw(); 056 int pos = f.getDelimiterIdx() + 1; 057 if (buf == null) { 058 String body = f.getBody(); 059 if (body == null) { 060 return; 061 } 062 buf = ContentUtil.encode(body); 063 pos = 0; 064 } 065 RawFieldParser parser = RawFieldParser.DEFAULT; 066 ParserCursor cursor = new ParserCursor(pos, buf.length()); 067 for (;;) { 068 String token = parser.parseToken(buf, cursor, DELIM); 069 if (token.length() > 0) { 070 languages.add(token); 071 } 072 if (cursor.atEnd()) { 073 break; 074 } else { 075 pos = cursor.getPos(); 076 if (buf.byteAt(pos) == COMMA) { 077 cursor.updatePos(pos + 1); 078 } 079 } 080 } 081 } 082 083 public List<String> getLanguages() { 084 if (!parsed) { 085 parse(); 086 } 087 return new ArrayList<String>(languages); 088 } 089 090 public static final FieldParser<ContentLanguageField> PARSER = new FieldParser<ContentLanguageField>() { 091 092 public ContentLanguageField parse(final Field rawField, final DecodeMonitor monitor) { 093 return new ContentLanguageFieldLenientImpl(rawField, monitor); 094 } 095 096 }; 097 098} 099