001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.apache.commons.net.ftp.parser; 019 020import org.apache.commons.net.ftp.FTPFile; 021import org.apache.commons.net.ftp.FTPFileEntryParser; 022import org.apache.commons.net.ftp.FTPFileEntryParserImpl; 023 024/** 025 * This implementation allows to pack some FileEntryParsers together 026 * and handle the case where to returned dirstyle isnt clearly defined. 027 * The matching parser will be cached. 028 * If the cached parser wont match due to the server changed the dirstyle, 029 * a new matching parser will be searched. 030 */ 031public class CompositeFileEntryParser extends FTPFileEntryParserImpl 032{ 033 private final FTPFileEntryParser[] ftpFileEntryParsers; 034 private FTPFileEntryParser cachedFtpFileEntryParser; 035 036 public CompositeFileEntryParser(FTPFileEntryParser[] ftpFileEntryParsers) 037 { 038 super(); 039 040 this.cachedFtpFileEntryParser = null; 041 this.ftpFileEntryParsers = ftpFileEntryParsers; 042 } 043 044 @Override 045 public FTPFile parseFTPEntry(String listEntry) 046 { 047 if (cachedFtpFileEntryParser != null) 048 { 049 FTPFile matched = cachedFtpFileEntryParser.parseFTPEntry(listEntry); 050 if (matched != null) 051 { 052 return matched; 053 } 054 } 055 else 056 { 057 for (FTPFileEntryParser ftpFileEntryParser : ftpFileEntryParsers) 058 { 059 FTPFile matched = ftpFileEntryParser.parseFTPEntry(listEntry); 060 if (matched != null) 061 { 062 cachedFtpFileEntryParser = ftpFileEntryParser; 063 return matched; 064 } 065 } 066 } 067 return null; 068 } 069}