    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 *
    031 * @author Mario Ivankovits <mario@ops.co.at>
    032 */
    033public class CompositeFileEntryParser extends FTPFileEntryParserImpl
    034{
    035    private final FTPFileEntryParser[] ftpFileEntryParsers;
    036    private FTPFileEntryParser cachedFtpFileEntryParser;
    037
    038    public CompositeFileEntryParser(FTPFileEntryParser[] ftpFileEntryParsers)
    039    {
    040        super();
    041
    042        this.cachedFtpFileEntryParser = null;
    043        this.ftpFileEntryParsers = ftpFileEntryParsers;
    044    }
    045
    046//    @Override
    047    public FTPFile parseFTPEntry(String listEntry)
    048    {
    049        if (cachedFtpFileEntryParser != null)
    050        {
    051            FTPFile matched = cachedFtpFileEntryParser.parseFTPEntry(listEntry);
    052            if (matched != null)
    053            {
    054                return matched;
    055            }
    056        }
    057        else
    058        {
    059            for (FTPFileEntryParser ftpFileEntryParser : ftpFileEntryParsers)
    060            {
    061                FTPFile matched = ftpFileEntryParser.parseFTPEntry(listEntry);
    062                if (matched != null)
    063                {
    064                    cachedFtpFileEntryParser = ftpFileEntryParser;
    065                    return matched;
    066                }
    067            }
    068        }
    069        return null;
    070    }
    071}