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.io.StringReader;
023 import java.util.Date;
024
025 import org.apache.james.mime4j.codec.DecodeMonitor;
026 import org.apache.james.mime4j.dom.FieldParser;
027 import org.apache.james.mime4j.dom.field.DateTimeField;
028 import org.apache.james.mime4j.field.datetime.parser.DateTimeParser;
029 import org.apache.james.mime4j.field.datetime.parser.ParseException;
030 import org.apache.james.mime4j.field.datetime.parser.TokenMgrError;
031 import org.apache.james.mime4j.stream.Field;
032
033 /**
034 * Date-time field such as <code>Date</code> or <code>Resent-Date</code>.
035 */
036 public class DateTimeFieldImpl extends AbstractField implements DateTimeField {
037 private boolean parsed = false;
038
039 private Date date;
040 private ParseException parseException;
041
042 DateTimeFieldImpl(Field rawField, DecodeMonitor monitor) {
043 super(rawField, monitor);
044 }
045
046 /**
047 * @see org.apache.james.mime4j.dom.field.DateTimeField#getDate()
048 */
049 public Date getDate() {
050 if (!parsed)
051 parse();
052
053 return date;
054 }
055
056 /**
057 * @see org.apache.james.mime4j.dom.field.DateTimeField#getParseException()
058 */
059 @Override
060 public ParseException getParseException() {
061 if (!parsed)
062 parse();
063
064 return parseException;
065 }
066
067 private void parse() {
068 String body = getBody();
069
070 try {
071 date = new DateTimeParser(new StringReader(body)).parseAll()
072 .getDate();
073 } catch (ParseException e) {
074 parseException = e;
075 } catch (TokenMgrError e) {
076 parseException = new ParseException(e.getMessage());
077 }
078
079 parsed = true;
080 }
081
082 public static final FieldParser<DateTimeField> PARSER = new FieldParser<DateTimeField>() {
083
084 public DateTimeField parse(final Field rawField, final DecodeMonitor monitor) {
085 return new DateTimeFieldImpl(rawField, monitor);
086 }
087
088 };
089 }