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.dom.FieldParser;
024import org.apache.james.mime4j.dom.field.ContentLocationField;
025import org.apache.james.mime4j.stream.Field;
026import org.apache.james.mime4j.stream.ParserCursor;
027import org.apache.james.mime4j.stream.RawField;
028import org.apache.james.mime4j.stream.RawFieldParser;
029import org.apache.james.mime4j.util.ByteSequence;
030import org.apache.james.mime4j.util.CharsetUtil;
031import org.apache.james.mime4j.util.ContentUtil;
032
033/**
034 * Represents a <code>Content-Location</code> field.
035 */
036public class ContentLocationFieldLenientImpl extends AbstractField implements ContentLocationField {
037
038    private boolean parsed = false;
039    private String location;
040
041    ContentLocationFieldLenientImpl(Field rawField, DecodeMonitor monitor) {
042        super(rawField, monitor);
043    }
044
045    private void parse() {
046        parsed = true;
047        location = null;
048        RawField f = getRawField();
049        ByteSequence buf = f.getRaw();
050        int pos = f.getDelimiterIdx() + 1;
051        if (buf == null) {
052            String body = f.getBody();
053            if (body == null) {
054                return;
055            }
056            buf = ContentUtil.encode(body);
057            pos = 0;
058        }
059        RawFieldParser parser = RawFieldParser.DEFAULT;
060        ParserCursor cursor = new ParserCursor(pos, buf.length());
061        String token = parser.parseValue(buf, cursor, null);
062        StringBuilder sb = new StringBuilder(token.length());
063        for (int i = 0; i < token.length(); i++) {
064            char ch = token.charAt(i);
065            if (!CharsetUtil.isWhitespace(ch)) {
066                sb.append(ch);
067            }
068        }
069        this.location = sb.toString();
070    }
071
072    public String getLocation() {
073        if (!parsed) {
074            parse();
075        }
076        return location;
077    }
078
079    public static final FieldParser<ContentLocationField> PARSER = new FieldParser<ContentLocationField>() {
080
081        public ContentLocationField parse(final Field rawField, final DecodeMonitor monitor) {
082            return new ContentLocationFieldLenientImpl(rawField, monitor);
083        }
084
085    };
086
087}
088