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.BitSet; 023 024import org.apache.james.mime4j.codec.DecodeMonitor; 025import org.apache.james.mime4j.dom.FieldParser; 026import org.apache.james.mime4j.dom.field.MimeVersionField; 027import org.apache.james.mime4j.stream.Field; 028import org.apache.james.mime4j.stream.ParserCursor; 029import org.apache.james.mime4j.stream.RawField; 030import org.apache.james.mime4j.stream.RawFieldParser; 031import org.apache.james.mime4j.util.ByteSequence; 032import org.apache.james.mime4j.util.ContentUtil; 033 034/** 035 * Represents a <code>MIME-Version</code> field. 036 */ 037public class MimeVersionFieldLenientImpl extends AbstractField implements MimeVersionField { 038 039 private final static int FULL_STOP = '.'; 040 private final static BitSet DELIM = RawFieldParser.INIT_BITSET(FULL_STOP); 041 042 public static final int DEFAULT_MINOR_VERSION = 0; 043 public static final int DEFAULT_MAJOR_VERSION = 1; 044 045 private boolean parsed = false; 046 private int major = DEFAULT_MAJOR_VERSION; 047 private int minor = DEFAULT_MINOR_VERSION; 048 049 MimeVersionFieldLenientImpl(Field rawField, DecodeMonitor monitor) { 050 super(rawField, monitor); 051 } 052 053 private void parse() { 054 parsed = true; 055 major = DEFAULT_MAJOR_VERSION; 056 minor = DEFAULT_MINOR_VERSION; 057 RawField f = getRawField(); 058 ByteSequence buf = f.getRaw(); 059 int pos = f.getDelimiterIdx() + 1; 060 if (buf == null) { 061 String body = f.getBody(); 062 if (body == null) { 063 return; 064 } 065 buf = ContentUtil.encode(body); 066 pos = 0; 067 } 068 RawFieldParser parser = RawFieldParser.DEFAULT; 069 ParserCursor cursor = new ParserCursor(pos, buf.length()); 070 String token1 = parser.parseValue(buf, cursor, DELIM); 071 try { 072 major = Integer.parseInt(token1); 073 if (major < 0) { 074 major = 0; 075 } 076 } catch (NumberFormatException ex) { 077 } 078 if (!cursor.atEnd() && buf.byteAt(cursor.getPos()) == FULL_STOP) { 079 cursor.updatePos(cursor.getPos() + 1); 080 } 081 String token2 = parser.parseValue(buf, cursor, null); 082 try { 083 minor = Integer.parseInt(token2); 084 if (minor < 0) { 085 minor = 0; 086 } 087 } catch (NumberFormatException ex) { 088 } 089 } 090 091 public int getMinorVersion() { 092 if (!parsed) { 093 parse(); 094 } 095 return minor; 096 } 097 098 public int getMajorVersion() { 099 if (!parsed) { 100 parse(); 101 } 102 return major; 103 } 104 105 public static final FieldParser<MimeVersionField> PARSER = new FieldParser<MimeVersionField>() { 106 107 public MimeVersionField parse(final Field rawField, final DecodeMonitor monitor) { 108 return new MimeVersionFieldLenientImpl(rawField, monitor); 109 } 110 111 }; 112 113}