Commons Net example source code file (MLSDComparison.java)

This example Commons Net source code file (MLSDComparison.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons Net tags/keywords

calendar, calendar, comparator, file, file, fileinputstream, ftpclientconfig, ftpfile, ftpfile, ftplistparseengine, io, string, string, unixftpentryparser, utc, util

The Commons Net MLSDComparison.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.commons.net.ftp.parser;

import java.io.File;
import java.io.FileInputStream;
import java.io.FilenameFilter;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Comparator;
import java.util.TimeZone;

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPFileFilters;
import org.apache.commons.net.ftp.FTPListParseEngine;
import org.apache.commons.net.ftp.parser.MLSxEntryParser;
import org.apache.commons.net.ftp.parser.UnixFTPEntryParser;
import org.junit.Test;

/**
 * Attempt comparison of LIST and MLSD listings
 * 
 * TODO - needs some work.
 */
public class MLSDComparison {

    private Comparator<FTPFile> cmp = new Comparator() {
        public int compare(FTPFile o1, FTPFile o2) {
                String n1 = o1.getName();
                String n2 = o2.getName();
                return n1.compareTo(n2);
            }
    };

    @Test
    public void testFile() throws Exception{
        File path = new File(DownloadListings.DOWNLOAD_DIR);
        FilenameFilter filter = new FilenameFilter(){
            public boolean accept(File dir, String name) {
                return name.endsWith("_mlsd.txt");
            }

        };
        for (File mlsd : path.listFiles(filter)){
            System.out.println(mlsd);
            InputStream is = new FileInputStream(mlsd);
            FTPListParseEngine engine = new FTPListParseEngine(MLSxEntryParser.getInstance());
            engine.readServerList(is, FTP.DEFAULT_CONTROL_ENCODING);
            FTPFile [] mlsds = engine.getFiles(FTPFileFilters.ALL);
            is.close();
            File list = new File(mlsd.getParentFile(),mlsd.getName().replace("_mlsd", "_list"));

            System.out.println(list);
            is = new FileInputStream(list);
            FTPClientConfig cfg = new FTPClientConfig();
            cfg.setServerTimeZoneId("GMT");
            UnixFTPEntryParser parser = new UnixFTPEntryParser(cfg);
            engine = new FTPListParseEngine(parser);
            engine.readServerList(is, FTP.DEFAULT_CONTROL_ENCODING);
            FTPFile [] lists = engine.getFiles(FTPFileFilters.ALL);
            is.close();
            compareSortedLists(mlsds, lists);
        }
    }

    private void compareSortedLists(FTPFile[] lst, FTPFile[] mlst){
        Arrays.sort(lst, cmp );
        Arrays.sort(mlst, cmp );
        FTPFile first, second;
        int firstl=lst.length;
        int secondl=mlst.length;
        int one=0, two=0;
        first = lst[one++];
        second = mlst[two++];
        int cmp;
        while (one < firstl || two < secondl) {
//            String fs1 = first.toFormattedString();
//            String fs2 = second.toFormattedString();
            String rl1 = first.getRawListing();
            String rl2 = second.getRawListing();
            cmp = first.getName().compareTo(second.getName());
            if (cmp == 0) {
                if (first.getName().endsWith("HEADER.html")){
                    cmp = 0;
                }
                if (!areEquivalent(first, second)){
//                    System.out.println(rl1);
//                    System.out.println(fs1);
                    long tdiff = first.getTimestamp().getTimeInMillis()-second.getTimestamp().getTimeInMillis();
                    System.out.println("Minutes diff "+tdiff/(1000*60));
//                    System.out.println(fs2);
//                    System.out.println(rl2);
//                    System.out.println();
//                    fail();
                }
                if (one < firstl) {
                    first = lst[one++];
                }
                if (two < secondl) {
                    second = mlst[two++];
                }
            } else if (cmp < 0) {
                if (!first.getName().startsWith(".")) { // skip hidden files
                    System.out.println("1: "+rl1);
                }
                if (one < firstl) {
                    first = lst[one++];
                }
            } else {
                System.out.println("2: "+rl2);
                if (two < secondl) {
                    second = mlst[two++];
                }
            }
        }
    }
    /**
     * Compare two instances to see if they are the same,
     * ignoring any uninitialised fields.
     *
     * @param b
     * @return true if the initialised fields are the same
     * @since 3.0
     */
    public boolean areEquivalent(FTPFile a, FTPFile b) {
        return
            a.getName().equals(b.getName()) &&
            areSame(a.getSize(), b.getSize(), -1L) &&
//            areSame(a.getUser(), b.getUser()) &&
//            areSame(a.getGroup(), b.getGroup()) &&
            areSame(a.getTimestamp(), b.getTimestamp()) &&
//            areSame(a.getType(), b.getType(), UNKNOWN_TYPE) &&
//            areSame(a.getHardLinkCount(), b.getHardLinkCount(), 0) &&
//            areSame(a._permissions, b._permissions)
            true
            ;
    }

    // compare permissions: default is all false, but that is also a possible
    // state, so this may miss some differences
//    private boolean areSame(boolean[][] a, boolean[][] b) {
//        return isDefault(a) || isDefault(b) || Arrays.deepEquals(a, b);
//    }

    // Is the array in its default state?
//    private boolean isDefault(boolean[][] a) {
//        for(boolean[] r : a){
//            for(boolean rc : r){
//                if (rc) { // not default
//                    return false;
//                }
//            }
//        }
//        return true;
//    }


    private boolean areSame(Calendar a, Calendar b) {
        return a == null || b == null || areSameDateTime(a, b);
    }

    private boolean areSameDateTime(Calendar a, Calendar b) {
        TimeZone UTC = TimeZone.getTimeZone("UTC");
        Calendar ac = Calendar.getInstance(UTC);
        ac.setTime(a.getTime());
        Calendar bc = Calendar.getInstance(UTC);
        bc.setTime(b.getTime());
        return isSameDay(ac, bc) && isSameTime(ac, bc);
    }

    private boolean isSameDay(Calendar a, Calendar b) {
        int ad = a.get(Calendar.DAY_OF_MONTH);
        int bd = b.get(Calendar.DAY_OF_MONTH);
        return
            a.get(Calendar.YEAR) == b.get(Calendar.YEAR) &&
            a.get(Calendar.MONTH) == b.get(Calendar.MONTH) &&
            ad == bd
            ;
    }
    private boolean isSameTime(Calendar a, Calendar b) {
        int ah = a.get(Calendar.HOUR_OF_DAY);
        int bh = b.get(Calendar.HOUR_OF_DAY);
        int am = a.get(Calendar.MINUTE);
        int bm = b.get(Calendar.MINUTE);
        int as = a.get(Calendar.SECOND);
        int bs = b.get(Calendar.SECOND);
        return
            (ah == 0 && am == 0 && as ==0) ||
            (bh == 0 && bm == 0 && bs ==0) ||
            (ah == bh && am == bm) // ignore seconds
            ;
    }


    private boolean areSame(long a, long b, long d) {
        return a == d || b == d || a == b;
    }

//    private boolean areSame(int a, int b, int d) {
//        return a == d || b == d || a == b;
//    }
//
//    private boolean areSame(String a, String b) {
//        return a.length() == 0 || b.length() == 0 || a.equals(b);
//    }
}