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(final FTPFileEntryParser[] ftpFileEntryParsers) 037 { 038 this.cachedFtpFileEntryParser = null; 039 this.ftpFileEntryParsers = ftpFileEntryParsers; 040 } 041 042 @Override 043 public FTPFile parseFTPEntry(final String listEntry) 044 { 045 if (cachedFtpFileEntryParser != null) 046 { 047 final FTPFile matched = cachedFtpFileEntryParser.parseFTPEntry(listEntry); 048 if (matched != null) 049 { 050 return matched; 051 } 052 } 053 else 054 { 055 for (final FTPFileEntryParser ftpFileEntryParser : ftpFileEntryParsers) 056 { 057 final FTPFile matched = ftpFileEntryParser.parseFTPEntry(listEntry); 058 if (matched != null) 059 { 060 cachedFtpFileEntryParser = ftpFileEntryParser; 061 return matched; 062 } 063 } 064 } 065 return null; 066 } 067}