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     1.1 --- a/src/net/fortuna/ical4j/util/UidGenerator.java	Thu Feb 12 18:02:00 2015 +0100
     1.2 +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.3 @@ -1,109 +0,0 @@
     1.4 -/**
     1.5 - * Copyright (c) 2012, Ben Fortuna
     1.6 - * All rights reserved.
     1.7 - *
     1.8 - * Redistribution and use in source and binary forms, with or without
     1.9 - * modification, are permitted provided that the following conditions
    1.10 - * are met:
    1.11 - *
    1.12 - *  o Redistributions of source code must retain the above copyright
    1.13 - * notice, this list of conditions and the following disclaimer.
    1.14 - *
    1.15 - *  o Redistributions in binary form must reproduce the above copyright
    1.16 - * notice, this list of conditions and the following disclaimer in the
    1.17 - * documentation and/or other materials provided with the distribution.
    1.18 - *
    1.19 - *  o Neither the name of Ben Fortuna nor the names of any other contributors
    1.20 - * may be used to endorse or promote products derived from this software
    1.21 - * without specific prior written permission.
    1.22 - *
    1.23 - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    1.24 - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    1.25 - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    1.26 - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
    1.27 - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
    1.28 - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
    1.29 - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
    1.30 - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
    1.31 - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
    1.32 - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    1.33 - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    1.34 - */
    1.35 -package net.fortuna.ical4j.util;
    1.36 -
    1.37 -import java.net.SocketException;
    1.38 -
    1.39 -import net.fortuna.ical4j.model.DateTime;
    1.40 -import net.fortuna.ical4j.model.property.Uid;
    1.41 -
    1.42 -/**
    1.43 - * $Id$
    1.44 - *
    1.45 - * Created on 11/03/2007
    1.46 - *
    1.47 - * Generates {@link Uid} properties in a similar fashion to that recommended in section 4.8.4.7 of the specification.
    1.48 - * @author Ben Fortuna
    1.49 - */
    1.50 -public class UidGenerator {
    1.51 -
    1.52 -    private final String pid;
    1.53 -
    1.54 -    private final HostInfo hostInfo;
    1.55 -
    1.56 -    private static long lastMillis;
    1.57 -
    1.58 -    /**
    1.59 -     * @param pid a unique process identifier for the host machine
    1.60 -     * @throws SocketException where host information cannot be retrieved
    1.61 -     */
    1.62 -    public UidGenerator(String pid) throws SocketException {
    1.63 -        this(new InetAddressHostInfo(), pid);
    1.64 -    }
    1.65 -
    1.66 -    /**
    1.67 -     * @param hostInfo custom host information
    1.68 -     * @param pid a unique process identifier for the host machine
    1.69 -     */
    1.70 -    public UidGenerator(HostInfo hostInfo, String pid) {
    1.71 -        this.hostInfo = hostInfo;
    1.72 -        this.pid = pid;
    1.73 -    }
    1.74 -
    1.75 -    /**
    1.76 -     * @return a unique component identifier
    1.77 -     */
    1.78 -    public Uid generateUid() {
    1.79 -        final StringBuffer b = new StringBuffer();
    1.80 -        b.append(uniqueTimestamp());
    1.81 -        b.append('-');
    1.82 -        b.append(pid);
    1.83 -        if (hostInfo != null) {
    1.84 -            b.append('@');
    1.85 -            b.append(hostInfo.getHostName());
    1.86 -        }
    1.87 -        return new Uid(b.toString());
    1.88 -    }
    1.89 -
    1.90 -    /**
    1.91 -     * Generates a timestamp guaranteed to be unique for the current JVM instance.
    1.92 -     * @return a {@link DateTime} instance representing a unique timestamp
    1.93 -     */
    1.94 -    private static DateTime uniqueTimestamp() {
    1.95 -        long currentMillis;
    1.96 -        synchronized (UidGenerator.class) {
    1.97 -            currentMillis = System.currentTimeMillis();
    1.98 -            // guarantee uniqueness by ensuring timestamp is always greater
    1.99 -            // than the previous..
   1.100 -            if (currentMillis < lastMillis) {
   1.101 -                currentMillis = lastMillis;
   1.102 -            }
   1.103 -            if (currentMillis - lastMillis < Dates.MILLIS_PER_SECOND) {
   1.104 -                currentMillis += Dates.MILLIS_PER_SECOND;
   1.105 -            }
   1.106 -            lastMillis = currentMillis;
   1.107 -        }
   1.108 -        final DateTime timestamp = new DateTime(currentMillis);
   1.109 -        timestamp.setUtc(true);
   1.110 -        return timestamp;
   1.111 -    }
   1.112 -}