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 org.apache.james.mime4j.codec.DecodeMonitor;
023    import org.apache.james.mime4j.codec.DecoderUtil;
024    import org.apache.james.mime4j.dom.FieldParser;
025    import org.apache.james.mime4j.dom.field.UnstructuredField;
026    import org.apache.james.mime4j.stream.Field;
027    
028    /**
029     * Simple unstructured field such as <code>Subject</code>.
030     */
031    public 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    }