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apache / logging-log4j-site / 9755b12b39efbc0142688f9b1a11ec68db89f97b / . / 2.13.1 / log4j-core / xref / org / apache / logging / log4j / core / util / UuidUtil.html
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<a class="jxr_linenumber" name="L1" href="#L1">1</a> <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="L2" href="#L2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</em>
<a class="jxr_linenumber" name="L3" href="#L3">3</a> <em class="jxr_comment"> * contributor license agreements. See the NOTICE file distributed with</em>
<a class="jxr_linenumber" name="L4" href="#L4">4</a> <em class="jxr_comment"> * this work for additional information regarding copyright ownership.</em>
<a class="jxr_linenumber" name="L5" href="#L5">5</a> <em class="jxr_comment"> * The ASF licenses this file to You under the Apache license, Version 2.0</em>
<a class="jxr_linenumber" name="L6" href="#L6">6</a> <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with</em>
<a class="jxr_linenumber" name="L7" href="#L7">7</a> <em class="jxr_comment"> * the License. You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="L8" href="#L8">8</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L9" href="#L9">9</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2." target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.</a>0</em>
<a class="jxr_linenumber" name="L10" href="#L10">10</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L11" href="#L11">11</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="L12" href="#L12">12</a> <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a class="jxr_linenumber" name="L13" href="#L13">13</a> <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a class="jxr_linenumber" name="L14" href="#L14">14</a> <em class="jxr_comment"> * See the license for the specific language governing permissions and</em>
<a class="jxr_linenumber" name="L15" href="#L15">15</a> <em class="jxr_comment"> * limitations under the license.</em>
<a class="jxr_linenumber" name="L16" href="#L16">16</a> <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="L17" href="#L17">17</a> <strong class="jxr_keyword">package</strong> org.apache.logging.log4j.core.util;
<a class="jxr_linenumber" name="L18" href="#L18">18</a>
<a class="jxr_linenumber" name="L19" href="#L19">19</a> <strong class="jxr_keyword">import</strong> java.net.InetAddress;
<a class="jxr_linenumber" name="L20" href="#L20">20</a> <strong class="jxr_keyword">import</strong> java.net.NetworkInterface;
<a class="jxr_linenumber" name="L21" href="#L21">21</a> <strong class="jxr_keyword">import</strong> java.net.SocketException;
<a class="jxr_linenumber" name="L22" href="#L22">22</a> <strong class="jxr_keyword">import</strong> java.net.UnknownHostException;
<a class="jxr_linenumber" name="L23" href="#L23">23</a> <strong class="jxr_keyword">import</strong> java.nio.ByteBuffer;
<a class="jxr_linenumber" name="L24" href="#L24">24</a> <strong class="jxr_keyword">import</strong> java.security.SecureRandom;
<a class="jxr_linenumber" name="L25" href="#L25">25</a> <strong class="jxr_keyword">import</strong> java.util.Enumeration;
<a class="jxr_linenumber" name="L26" href="#L26">26</a> <strong class="jxr_keyword">import</strong> java.util.Random;
<a class="jxr_linenumber" name="L27" href="#L27">27</a> <strong class="jxr_keyword">import</strong> java.util.UUID;
<a class="jxr_linenumber" name="L28" href="#L28">28</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicInteger;
<a class="jxr_linenumber" name="L29" href="#L29">29</a>
<a class="jxr_linenumber" name="L30" href="#L30">30</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.Logger;
<a class="jxr_linenumber" name="L31" href="#L31">31</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.status.StatusLogger;
<a class="jxr_linenumber" name="L32" href="#L32">32</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.util.PropertiesUtil;
<a class="jxr_linenumber" name="L33" href="#L33">33</a>
<a class="jxr_linenumber" name="L34" href="#L34">34</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L35" href="#L35">35</a> <em class="jxr_javadoccomment"> * Generates a unique ID. The generated UUID will be unique for approximately 8,925 years so long as</em>
<a class="jxr_linenumber" name="L36" href="#L36">36</a> <em class="jxr_javadoccomment"> * less than 10,000 IDs are generated per millisecond on the same device (as identified by its MAC address).</em>
<a class="jxr_linenumber" name="L37" href="#L37">37</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L38" href="#L38">38</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/logging/log4j/core/util/UuidUtil.html">UuidUtil</a> {
<a class="jxr_linenumber" name="L39" href="#L39">39</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L40" href="#L40">40</a> <em class="jxr_javadoccomment"> * System property that may be used to seed the UUID generation with an integer value.</em>
<a class="jxr_linenumber" name="L41" href="#L41">41</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L42" href="#L42">42</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String UUID_SEQUENCE = <span class="jxr_string">"org.apache.logging.log4j.uuidSequence"</span>;
<a class="jxr_linenumber" name="L43" href="#L43">43</a>
<a class="jxr_linenumber" name="L44" href="#L44">44</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger LOGGER = StatusLogger.getLogger();
<a class="jxr_linenumber" name="L45" href="#L45">45</a>
<a class="jxr_linenumber" name="L46" href="#L46">46</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String ASSIGNED_SEQUENCES = <span class="jxr_string">"org.apache.logging.log4j.assignedSequences"</span>;
<a class="jxr_linenumber" name="L47" href="#L47">47</a>
<a class="jxr_linenumber" name="L48" href="#L48">48</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> AtomicInteger COUNT = <strong class="jxr_keyword">new</strong> AtomicInteger(0);
<a class="jxr_linenumber" name="L49" href="#L49">49</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> TYPE1 = 0x1000L;
<a class="jxr_linenumber" name="L50" href="#L50">50</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte VARIANT = (byte) 0x80;
<a class="jxr_linenumber" name="L51" href="#L51">51</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> SEQUENCE_MASK = 0x3FFF;
<a class="jxr_linenumber" name="L52" href="#L52">52</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> NUM_100NS_INTERVALS_SINCE_UUID_EPOCH = 0x01b21dd213814000L;
<a class="jxr_linenumber" name="L53" href="#L53">53</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> INITIAL_UUID_SEQNO = PropertiesUtil.getProperties().getLongProperty(UUID_SEQUENCE, 0);
<a class="jxr_linenumber" name="L54" href="#L54">54</a>
<a class="jxr_linenumber" name="L55" href="#L55">55</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> LOW_MASK = 0xffffffffL;
<a class="jxr_linenumber" name="L56" href="#L56">56</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> MID_MASK = 0xffff00000000L;
<a class="jxr_linenumber" name="L57" href="#L57">57</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> HIGH_MASK = 0xfff000000000000L;
<a class="jxr_linenumber" name="L58" href="#L58">58</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> NODE_SIZE = 8;
<a class="jxr_linenumber" name="L59" href="#L59">59</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> SHIFT_2 = 16;
<a class="jxr_linenumber" name="L60" href="#L60">60</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> SHIFT_4 = 32;
<a class="jxr_linenumber" name="L61" href="#L61">61</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> SHIFT_6 = 48;
<a class="jxr_linenumber" name="L62" href="#L62">62</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> HUNDRED_NANOS_PER_MILLI = 10000;
<a class="jxr_linenumber" name="L63" href="#L63">63</a>
<a class="jxr_linenumber" name="L64" href="#L64">64</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> LEAST = initialize(NetUtils.getMacAddress());
<a class="jxr_linenumber" name="L65" href="#L65">65</a>
<a class="jxr_linenumber" name="L66" href="#L66">66</a> <em class="jxr_comment">/* This class cannot be instantiated */</em>
<a class="jxr_linenumber" name="L67" href="#L67">67</a> <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/logging/log4j/core/util/UuidUtil.html">UuidUtil</a>() {
<a class="jxr_linenumber" name="L68" href="#L68">68</a> }
<a class="jxr_linenumber" name="L69" href="#L69">69</a>
<a class="jxr_linenumber" name="L70" href="#L70">70</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L71" href="#L71">71</a> <em class="jxr_javadoccomment"> * Initializes this class</em>
<a class="jxr_linenumber" name="L72" href="#L72">72</a> <em class="jxr_javadoccomment"> * </em>
<a class="jxr_linenumber" name="L73" href="#L73">73</a> <em class="jxr_javadoccomment"> * @param mac MAC address</em>
<a class="jxr_linenumber" name="L74" href="#L74">74</a> <em class="jxr_javadoccomment"> * @return Least</em>
<a class="jxr_linenumber" name="L75" href="#L75">75</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L76" href="#L76">76</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">long</strong> initialize(byte[] mac) {
<a class="jxr_linenumber" name="L77" href="#L77">77</a> <strong class="jxr_keyword">final</strong> Random randomGenerator = <strong class="jxr_keyword">new</strong> SecureRandom();
<a class="jxr_linenumber" name="L78" href="#L78">78</a> <strong class="jxr_keyword">if</strong> (mac == <strong class="jxr_keyword">null</strong> || mac.length == 0) {
<a class="jxr_linenumber" name="L79" href="#L79">79</a> mac = <strong class="jxr_keyword">new</strong> byte[6];
<a class="jxr_linenumber" name="L80" href="#L80">80</a> randomGenerator.nextBytes(mac);
<a class="jxr_linenumber" name="L81" href="#L81">81</a> }
<a class="jxr_linenumber" name="L82" href="#L82">82</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> length = mac.length &gt;= 6 ? 6 : mac.length;
<a class="jxr_linenumber" name="L83" href="#L83">83</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> index = mac.length &gt;= 6 ? mac.length - 6 : 0;
<a class="jxr_linenumber" name="L84" href="#L84">84</a> <strong class="jxr_keyword">final</strong> byte[] node = <strong class="jxr_keyword">new</strong> byte[NODE_SIZE];
<a class="jxr_linenumber" name="L85" href="#L85">85</a> node[0] = VARIANT;
<a class="jxr_linenumber" name="L86" href="#L86">86</a> node[1] = 0;
<a class="jxr_linenumber" name="L87" href="#L87">87</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 2; i &lt; NODE_SIZE; ++i) {
<a class="jxr_linenumber" name="L88" href="#L88">88</a> node[i] = 0;
<a class="jxr_linenumber" name="L89" href="#L89">89</a> }
<a class="jxr_linenumber" name="L90" href="#L90">90</a> System.arraycopy(mac, index, node, 2, length);
<a class="jxr_linenumber" name="L91" href="#L91">91</a> <strong class="jxr_keyword">final</strong> ByteBuffer buf = ByteBuffer.wrap(node);
<a class="jxr_linenumber" name="L92" href="#L92">92</a> <strong class="jxr_keyword">long</strong> rand = INITIAL_UUID_SEQNO;
<a class="jxr_linenumber" name="L93" href="#L93">93</a> String assigned = PropertiesUtil.getProperties().getStringProperty(ASSIGNED_SEQUENCES);
<a class="jxr_linenumber" name="L94" href="#L94">94</a> <strong class="jxr_keyword">long</strong>[] sequences;
<a class="jxr_linenumber" name="L95" href="#L95">95</a> <strong class="jxr_keyword">if</strong> (assigned == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L96" href="#L96">96</a> sequences = <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">long</strong>[0];
<a class="jxr_linenumber" name="L97" href="#L97">97</a> } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="L98" href="#L98">98</a> <strong class="jxr_keyword">final</strong> String[] array = assigned.split(Patterns.COMMA_SEPARATOR);
<a class="jxr_linenumber" name="L99" href="#L99">99</a> sequences = <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">long</strong>[array.length];
<a class="jxr_linenumber" name="L100" href="#L100">100</a> <strong class="jxr_keyword">int</strong> i = 0;
<a class="jxr_linenumber" name="L101" href="#L101">101</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> String value : array) {
<a class="jxr_linenumber" name="L102" href="#L102">102</a> sequences[i] = Long.parseLong(value);
<a class="jxr_linenumber" name="L103" href="#L103">103</a> ++i;
<a class="jxr_linenumber" name="L104" href="#L104">104</a> }
<a class="jxr_linenumber" name="L105" href="#L105">105</a> }
<a class="jxr_linenumber" name="L106" href="#L106">106</a> <strong class="jxr_keyword">if</strong> (rand == 0) {
<a class="jxr_linenumber" name="L107" href="#L107">107</a> rand = randomGenerator.nextLong();
<a class="jxr_linenumber" name="L108" href="#L108">108</a> }
<a class="jxr_linenumber" name="L109" href="#L109">109</a> rand &amp;= SEQUENCE_MASK;
<a class="jxr_linenumber" name="L110" href="#L110">110</a> <strong class="jxr_keyword">boolean</strong> duplicate;
<a class="jxr_linenumber" name="L111" href="#L111">111</a> <strong class="jxr_keyword">do</strong> {
<a class="jxr_linenumber" name="L112" href="#L112">112</a> duplicate = false;
<a class="jxr_linenumber" name="L113" href="#L113">113</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> sequence : sequences) {
<a class="jxr_linenumber" name="L114" href="#L114">114</a> <strong class="jxr_keyword">if</strong> (sequence == rand) {
<a class="jxr_linenumber" name="L115" href="#L115">115</a> duplicate = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="L116" href="#L116">116</a> <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="L117" href="#L117">117</a> }
<a class="jxr_linenumber" name="L118" href="#L118">118</a> }
<a class="jxr_linenumber" name="L119" href="#L119">119</a> <strong class="jxr_keyword">if</strong> (duplicate) {
<a class="jxr_linenumber" name="L120" href="#L120">120</a> rand = (rand + 1) &amp; SEQUENCE_MASK;
<a class="jxr_linenumber" name="L121" href="#L121">121</a> }
<a class="jxr_linenumber" name="L122" href="#L122">122</a> } <strong class="jxr_keyword">while</strong> (duplicate);
<a class="jxr_linenumber" name="L123" href="#L123">123</a> assigned = assigned == <strong class="jxr_keyword">null</strong> ? Long.toString(rand) : assigned + ',' + Long.toString(rand);
<a class="jxr_linenumber" name="L124" href="#L124">124</a> System.setProperty(ASSIGNED_SEQUENCES, assigned);
<a class="jxr_linenumber" name="L125" href="#L125">125</a>
<a class="jxr_linenumber" name="L126" href="#L126">126</a> <strong class="jxr_keyword">return</strong> buf.getLong() | rand &lt;&lt; SHIFT_6;
<a class="jxr_linenumber" name="L127" href="#L127">127</a> }
<a class="jxr_linenumber" name="L128" href="#L128">128</a>
<a class="jxr_linenumber" name="L129" href="#L129">129</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L130" href="#L130">130</a> <em class="jxr_javadoccomment"> * Generates Type 1 UUID. The time contains the number of 100NS intervals that have occurred</em>
<a class="jxr_linenumber" name="L131" href="#L131">131</a> <em class="jxr_javadoccomment"> * since 00:00:00.00 UTC, 10 October 1582. Each UUID on a particular machine is unique to the 100NS interval</em>
<a class="jxr_linenumber" name="L132" href="#L132">132</a> <em class="jxr_javadoccomment"> * until they rollover around 3400 A.D.</em>
<a class="jxr_linenumber" name="L133" href="#L133">133</a> <em class="jxr_javadoccomment"> * &lt;ol&gt;</em>
<a class="jxr_linenumber" name="L134" href="#L134">134</a> <em class="jxr_javadoccomment"> * &lt;li&gt;Digits 1-12 are the lower 48 bits of the number of 100 ns increments since the start of the UUID</em>
<a class="jxr_linenumber" name="L135" href="#L135">135</a> <em class="jxr_javadoccomment"> * epoch.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="L136" href="#L136">136</a> <em class="jxr_javadoccomment"> * &lt;li&gt;Digit 13 is the version (with a value of 1).&lt;/li&gt;</em>
<a class="jxr_linenumber" name="L137" href="#L137">137</a> <em class="jxr_javadoccomment"> * &lt;li&gt;Digits 14-16 are a sequence number that is incremented each time a UUID is generated.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="L138" href="#L138">138</a> <em class="jxr_javadoccomment"> * &lt;li&gt;Digit 17 is the variant (with a value of binary 10) and 10 bits of the sequence number&lt;/li&gt;</em>
<a class="jxr_linenumber" name="L139" href="#L139">139</a> <em class="jxr_javadoccomment"> * &lt;li&gt;Digit 18 is final 16 bits of the sequence number.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="L140" href="#L140">140</a> <em class="jxr_javadoccomment"> * &lt;li&gt;Digits 19-32 represent the system the application is running on.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="L141" href="#L141">141</a> <em class="jxr_javadoccomment"> * &lt;/ol&gt;</em>
<a class="jxr_linenumber" name="L142" href="#L142">142</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="L143" href="#L143">143</a> <em class="jxr_javadoccomment"> * @return universally unique identifiers (UUID)</em>
<a class="jxr_linenumber" name="L144" href="#L144">144</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L145" href="#L145">145</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> UUID getTimeBasedUuid() {
<a class="jxr_linenumber" name="L146" href="#L146">146</a>
<a class="jxr_linenumber" name="L147" href="#L147">147</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> time = ((System.currentTimeMillis() * HUNDRED_NANOS_PER_MILLI) +
<a class="jxr_linenumber" name="L148" href="#L148">148</a> NUM_100NS_INTERVALS_SINCE_UUID_EPOCH) + (COUNT.incrementAndGet() % HUNDRED_NANOS_PER_MILLI);
<a class="jxr_linenumber" name="L149" href="#L149">149</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> timeLow = (time &amp; LOW_MASK) &lt;&lt; SHIFT_4;
<a class="jxr_linenumber" name="L150" href="#L150">150</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> timeMid = (time &amp; MID_MASK) &gt;&gt; SHIFT_2;
<a class="jxr_linenumber" name="L151" href="#L151">151</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> timeHi = (time &amp; HIGH_MASK) &gt;&gt; SHIFT_6;
<a class="jxr_linenumber" name="L152" href="#L152">152</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> most = timeLow | timeMid | TYPE1 | timeHi;
<a class="jxr_linenumber" name="L153" href="#L153">153</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> UUID(most, LEAST);
<a class="jxr_linenumber" name="L154" href="#L154">154</a> }
<a class="jxr_linenumber" name="L155" href="#L155">155</a> }
<a class="jxr_linenumber" name="L156" href="#L156">156</a>
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