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; 023 024import org.apache.james.mime4j.MimeException; 025import org.apache.james.mime4j.codec.DecodeMonitor; 026import org.apache.james.mime4j.dom.FieldParser; 027import org.apache.james.mime4j.dom.field.MimeVersionField; 028import org.apache.james.mime4j.field.mimeversion.parser.MimeVersionParser; 029import org.apache.james.mime4j.field.mimeversion.parser.ParseException; 030import org.apache.james.mime4j.stream.Field; 031 032/** 033 * Represents a <code>MIME-Version</code> field. 034 */ 035public class MimeVersionFieldImpl extends AbstractField implements MimeVersionField { 036 037 public static final int DEFAULT_MINOR_VERSION = 0; 038 public static final int DEFAULT_MAJOR_VERSION = 1; 039 040 private boolean parsed = false; 041 private int major = DEFAULT_MAJOR_VERSION; 042 private int minor = DEFAULT_MINOR_VERSION; 043 private ParseException parsedException; 044 045 MimeVersionFieldImpl(Field rawField, DecodeMonitor monitor) { 046 super(rawField, monitor); 047 } 048 049 private void parse() { 050 parsed = true; 051 major = DEFAULT_MAJOR_VERSION; 052 minor = DEFAULT_MINOR_VERSION; 053 String body = getBody(); 054 if (body != null) { 055 StringReader reader = new StringReader(body); 056 MimeVersionParser parser = new MimeVersionParser(reader); 057 try { 058 parser.parse(); 059 int v = parser.getMajorVersion(); 060 if (v != MimeVersionParser.INITIAL_VERSION_VALUE) { 061 major = v; 062 } 063 v = parser.getMinorVersion(); 064 if (v != MimeVersionParser.INITIAL_VERSION_VALUE) { 065 minor = v; 066 } 067 } catch (MimeException ex) { 068 parsedException = new ParseException(ex); 069 } 070 } 071 } 072 073 public int getMinorVersion() { 074 if (!parsed) { 075 parse(); 076 } 077 return minor; 078 } 079 080 public int getMajorVersion() { 081 if (!parsed) { 082 parse(); 083 } 084 return major; 085 } 086 087 @Override 088 public org.apache.james.mime4j.dom.field.ParseException getParseException() { 089 return parsedException; 090 } 091 092 public static final FieldParser<MimeVersionField> PARSER = new FieldParser<MimeVersionField>() { 093 094 public MimeVersionField parse(final Field rawField, final DecodeMonitor monitor) { 095 return new MimeVersionFieldImpl(rawField, monitor); 096 } 097 098 }; 099 100}