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.dom.FieldParser;
024    import org.apache.james.mime4j.dom.field.ContentIdField;
025    import org.apache.james.mime4j.stream.Field;
026    
027    /**
028     * Represents a <code>Content-Transfer-Encoding</code> field.
029     */
030    public class ContentIdFieldImpl extends AbstractField implements ContentIdField {
031    
032        private boolean parsed = false;
033        private String id;
034    
035        ContentIdFieldImpl(Field rawField, DecodeMonitor monitor) {
036            super(rawField, monitor);
037        }
038    
039        private void parse() {
040            parsed = true;
041            String body = getBody();
042            if (body != null) {
043                id = body.trim();
044            } else {
045                id = null;
046            }
047        }
048    
049        public String getId() {
050            if (!parsed) {
051                parse();
052            }
053            return id;
054        }
055    
056        public static final FieldParser<ContentIdField> PARSER = new FieldParser<ContentIdField>() {
057    
058            public ContentIdField parse(final Field rawField, final DecodeMonitor monitor) {
059                return new ContentIdFieldImpl(rawField, monitor);
060            }
061    
062        };
063    
064    }
065