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.BitSet;
023
024 import org.apache.james.mime4j.codec.DecodeMonitor;
025 import org.apache.james.mime4j.dom.FieldParser;
026 import org.apache.james.mime4j.dom.field.MimeVersionField;
027 import org.apache.james.mime4j.stream.Field;
028 import org.apache.james.mime4j.stream.ParserCursor;
029 import org.apache.james.mime4j.stream.RawField;
030 import org.apache.james.mime4j.stream.RawFieldParser;
031 import org.apache.james.mime4j.util.ByteSequence;
032 import org.apache.james.mime4j.util.ContentUtil;
033
034 /**
035 * Represents a <code>MIME-Version</code> field.
036 */
037 public 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 }