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org.apache.commons.net.ftp.parser.CompositeFileEntryParser |
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1 | /* |
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2 | * Copyright 2004 The Apache Software Foundation |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package org.apache.commons.net.ftp.parser; |
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17 | ||
18 | import org.apache.commons.net.ftp.FTPFile; |
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19 | import org.apache.commons.net.ftp.FTPFileEntryParser; |
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20 | import org.apache.commons.net.ftp.FTPFileEntryParserImpl; |
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21 | ||
22 | /** |
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23 | * This implementation allows to pack some FileEntryParsers together |
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24 | * and handle the case where to returned dirstyle isnt clearly defined. |
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25 | * The matching parser will be cached. |
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26 | * If the cached parser wont match due to the server changed the dirstyle, |
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27 | * a new matching parser will be searched. |
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28 | * |
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29 | * @author Mario Ivankovits <mario@ops.co.at> |
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30 | */ |
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31 | public class CompositeFileEntryParser extends FTPFileEntryParserImpl |
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32 | { |
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33 | private final FTPFileEntryParser[] ftpFileEntryParsers; |
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34 | private FTPFileEntryParser cachedFtpFileEntryParser; |
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35 | ||
36 | public CompositeFileEntryParser(FTPFileEntryParser[] ftpFileEntryParsers) |
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37 | { |
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38 | 38 | super(); |
39 | ||
40 | 38 | this.cachedFtpFileEntryParser = null; |
41 | 38 | this.ftpFileEntryParsers = ftpFileEntryParsers; |
42 | 38 | } |
43 | ||
44 | public FTPFile parseFTPEntry(String listEntry) |
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45 | { |
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46 | 91 | if (cachedFtpFileEntryParser != null) |
47 | { |
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48 | 48 | FTPFile matched = cachedFtpFileEntryParser.parseFTPEntry(listEntry); |
49 | 48 | if (matched != null) |
50 | { |
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51 | 46 | return matched; |
52 | } |
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53 | } |
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54 | else |
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55 | { |
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56 | 93 | for (int iterParser=0; iterParser < ftpFileEntryParsers.length; iterParser++) |
57 | { |
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58 | 68 | FTPFileEntryParser ftpFileEntryParser = ftpFileEntryParsers[iterParser]; |
59 | ||
60 | 68 | FTPFile matched = ftpFileEntryParser.parseFTPEntry(listEntry); |
61 | 68 | if (matched != null) |
62 | { |
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63 | 18 | cachedFtpFileEntryParser = ftpFileEntryParser; |
64 | 18 | return matched; |
65 | } |
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66 | } |
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67 | } |
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68 | 27 | return null; |
69 | } |
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70 | } |
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