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 org.apache.james.mime4j.codec.DecodeMonitor;
023import org.apache.james.mime4j.codec.DecoderUtil;
024import org.apache.james.mime4j.dom.FieldParser;
025import org.apache.james.mime4j.dom.field.UnstructuredField;
026import org.apache.james.mime4j.stream.Field;
027
028/**
029 * Simple unstructured field such as <code>Subject</code>.
030 */
031public class UnstructuredFieldImpl extends AbstractField implements UnstructuredField {
032    private boolean parsed = false;
033
034    private String value;
035
036    UnstructuredFieldImpl(Field rawField, DecodeMonitor monitor) {
037        super(rawField, monitor);
038    }
039
040    /**
041     * @see org.apache.james.mime4j.dom.field.UnstructuredField#getValue()
042     */
043    public String getValue() {
044        if (!parsed)
045            parse();
046
047        return value;
048    }
049
050    private void parse() {
051        String body = getBody();
052
053        value = DecoderUtil.decodeEncodedWords(body, monitor);
054
055        parsed = true;
056    }
057
058    public static final FieldParser<UnstructuredField> PARSER = new FieldParser<UnstructuredField>() {
059
060        public UnstructuredField parse(final Field rawField, final DecodeMonitor monitor) {
061            return new UnstructuredFieldImpl(rawField, monitor);
062        }
063
064    };
065
066}