1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.net.ftp.parser;
19
20 import org.apache.commons.net.ftp.FTPFile;
21 import org.apache.commons.net.ftp.FTPFileEntryParser;
22 import org.apache.commons.net.ftp.FTPFileEntryParserImpl;
23
24 /**
25 * This implementation allows to pack some FileEntryParsers together
26 * and handle the case where to returned dirstyle isnt clearly defined.
27 * The matching parser will be cached.
28 * If the cached parser wont match due to the server changed the dirstyle,
29 * a new matching parser will be searched.
30 *
31 * @author Mario Ivankovits <mario@ops.co.at>
32 */
33 public class CompositeFileEntryParser extends FTPFileEntryParserImpl
34 {
35 private final FTPFileEntryParser[] ftpFileEntryParsers;
36 private FTPFileEntryParser cachedFtpFileEntryParser;
37
38 public CompositeFileEntryParser(FTPFileEntryParser[] ftpFileEntryParsers)
39 {
40 super();
41
42 this.cachedFtpFileEntryParser = null;
43 this.ftpFileEntryParsers = ftpFileEntryParsers;
44 }
45
46 public FTPFile parseFTPEntry(String listEntry)
47 {
48 if (cachedFtpFileEntryParser != null)
49 {
50 FTPFile matched = cachedFtpFileEntryParser.parseFTPEntry(listEntry);
51 if (matched != null)
52 {
53 return matched;
54 }
55 }
56 else
57 {
58 for (int iterParser=0; iterParser < ftpFileEntryParsers.length; iterParser++)
59 {
60 FTPFileEntryParser ftpFileEntryParser = ftpFileEntryParsers[iterParser];
61
62 FTPFile matched = ftpFileEntryParser.parseFTPEntry(listEntry);
63 if (matched != null)
64 {
65 cachedFtpFileEntryParser = ftpFileEntryParser;
66 return matched;
67 }
68 }
69 }
70 return null;
71 }
72 }