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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.nio.ByteBuffer;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.util.Comparator;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.util.ByteBufferUtils;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.hbase.thirdparty.com.google.common.primitives.Longs;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>/**<a name="line.29"></a>
<span class="sourceLineNo">030</span> * A {@link CellComparatorImpl} for &lt;code&gt;hbase:meta&lt;/code&gt; catalog table {@link KeyValue}s.<a name="line.30"></a>
<span class="sourceLineNo">031</span> */<a name="line.31"></a>
<span class="sourceLineNo">032</span>@InterfaceAudience.Private<a name="line.32"></a>
<span class="sourceLineNo">033</span>@InterfaceStability.Evolving<a name="line.33"></a>
<span class="sourceLineNo">034</span>public class MetaCellComparator extends CellComparatorImpl {<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
<span class="sourceLineNo">036</span> /**<a name="line.36"></a>
<span class="sourceLineNo">037</span> * A {@link MetaCellComparator} for &lt;code&gt;hbase:meta&lt;/code&gt; catalog table {@link KeyValue}s.<a name="line.37"></a>
<span class="sourceLineNo">038</span> */<a name="line.38"></a>
<span class="sourceLineNo">039</span> public static final MetaCellComparator META_COMPARATOR = new MetaCellComparator();<a name="line.39"></a>
<span class="sourceLineNo">040</span><a name="line.40"></a>
<span class="sourceLineNo">041</span> @Override<a name="line.41"></a>
<span class="sourceLineNo">042</span> public int compareRows(final Cell left, final Cell right) {<a name="line.42"></a>
<span class="sourceLineNo">043</span> if (left instanceof ByteBufferExtendedCell) {<a name="line.43"></a>
<span class="sourceLineNo">044</span> ByteBufferExtendedCell bbLeft = (ByteBufferExtendedCell) left;<a name="line.44"></a>
<span class="sourceLineNo">045</span> if (right instanceof ByteBufferExtendedCell) {<a name="line.45"></a>
<span class="sourceLineNo">046</span> ByteBufferExtendedCell bbRight = (ByteBufferExtendedCell) right;<a name="line.46"></a>
<span class="sourceLineNo">047</span> return compareBBRows(bbLeft.getRowByteBuffer(), bbLeft.getRowPosition(),<a name="line.47"></a>
<span class="sourceLineNo">048</span> left.getRowLength(), bbRight.getRowByteBuffer(), bbRight.getRowPosition(),<a name="line.48"></a>
<span class="sourceLineNo">049</span> right.getRowLength());<a name="line.49"></a>
<span class="sourceLineNo">050</span> } else {<a name="line.50"></a>
<span class="sourceLineNo">051</span> return compareBBAndBytesRows(bbLeft.getRowByteBuffer(), bbLeft.getRowPosition(),<a name="line.51"></a>
<span class="sourceLineNo">052</span> left.getRowLength(), right.getRowArray(), right.getRowOffset(), right.getRowLength());<a name="line.52"></a>
<span class="sourceLineNo">053</span> }<a name="line.53"></a>
<span class="sourceLineNo">054</span> } else {<a name="line.54"></a>
<span class="sourceLineNo">055</span> if (right instanceof ByteBufferExtendedCell) {<a name="line.55"></a>
<span class="sourceLineNo">056</span> ByteBufferExtendedCell bbRight = (ByteBufferExtendedCell) right;<a name="line.56"></a>
<span class="sourceLineNo">057</span> return -compareBBAndBytesRows(bbRight.getRowByteBuffer(), bbRight.getRowPosition(),<a name="line.57"></a>
<span class="sourceLineNo">058</span> right.getRowLength(), left.getRowArray(), left.getRowOffset(), left.getRowLength());<a name="line.58"></a>
<span class="sourceLineNo">059</span> } else {<a name="line.59"></a>
<span class="sourceLineNo">060</span> return compareBytesRows(left.getRowArray(), left.getRowOffset(), left.getRowLength(),<a name="line.60"></a>
<span class="sourceLineNo">061</span> right.getRowArray(), right.getRowOffset(), right.getRowLength());<a name="line.61"></a>
<span class="sourceLineNo">062</span> }<a name="line.62"></a>
<span class="sourceLineNo">063</span> }<a name="line.63"></a>
<span class="sourceLineNo">064</span> }<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span> @Override<a name="line.66"></a>
<span class="sourceLineNo">067</span> public int compareRows(Cell left, byte[] right, int roffset, int rlength) {<a name="line.67"></a>
<span class="sourceLineNo">068</span> if (left instanceof ByteBufferExtendedCell) {<a name="line.68"></a>
<span class="sourceLineNo">069</span> ByteBufferExtendedCell bbLeft = (ByteBufferExtendedCell) left;<a name="line.69"></a>
<span class="sourceLineNo">070</span> return compareBBAndBytesRows(bbLeft.getRowByteBuffer(), bbLeft.getRowPosition(),<a name="line.70"></a>
<span class="sourceLineNo">071</span> left.getRowLength(), right, roffset, rlength);<a name="line.71"></a>
<span class="sourceLineNo">072</span> } else {<a name="line.72"></a>
<span class="sourceLineNo">073</span> return compareBytesRows(left.getRowArray(), left.getRowOffset(), left.getRowLength(), right,<a name="line.73"></a>
<span class="sourceLineNo">074</span> roffset, rlength);<a name="line.74"></a>
<span class="sourceLineNo">075</span> }<a name="line.75"></a>
<span class="sourceLineNo">076</span> }<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span> @Override<a name="line.78"></a>
<span class="sourceLineNo">079</span> public int compareRows(byte[] leftRow, byte[] rightRow) {<a name="line.79"></a>
<span class="sourceLineNo">080</span> return compareBytesRows(leftRow, 0, leftRow.length, rightRow, 0, rightRow.length);<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> @Override<a name="line.83"></a>
<span class="sourceLineNo">084</span> public int compare(final Cell a, final Cell b, boolean ignoreSequenceid) {<a name="line.84"></a>
<span class="sourceLineNo">085</span> int diff = compareRows(a, b);<a name="line.85"></a>
<span class="sourceLineNo">086</span> if (diff != 0) {<a name="line.86"></a>
<span class="sourceLineNo">087</span> return diff;<a name="line.87"></a>
<span class="sourceLineNo">088</span> }<a name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
<span class="sourceLineNo">090</span> diff = compareWithoutRow(a, b);<a name="line.90"></a>
<span class="sourceLineNo">091</span> if (diff != 0) {<a name="line.91"></a>
<span class="sourceLineNo">092</span> return diff;<a name="line.92"></a>
<span class="sourceLineNo">093</span> }<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span> // Negate following comparisons so later edits show up first mvccVersion: later sorts first<a name="line.95"></a>
<span class="sourceLineNo">096</span> return ignoreSequenceid ? diff : Longs.compare(b.getSequenceId(), a.getSequenceId());<a name="line.96"></a>
<span class="sourceLineNo">097</span> }<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span> @FunctionalInterface<a name="line.99"></a>
<span class="sourceLineNo">100</span> private interface SearchDelimiter&lt;T&gt; {<a name="line.100"></a>
<span class="sourceLineNo">101</span> int search(T t, int offset, int length, int delimiter);<a name="line.101"></a>
<span class="sourceLineNo">102</span> }<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
<span class="sourceLineNo">104</span> @FunctionalInterface<a name="line.104"></a>
<span class="sourceLineNo">105</span> private interface SearchDelimiterInReverse&lt;T&gt; {<a name="line.105"></a>
<span class="sourceLineNo">106</span> int search(T t, int offset, int length, int delimiter);<a name="line.106"></a>
<span class="sourceLineNo">107</span> }<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span> @FunctionalInterface<a name="line.109"></a>
<span class="sourceLineNo">110</span> private interface Compare&lt;L, R&gt; {<a name="line.110"></a>
<span class="sourceLineNo">111</span> int compareTo(L left, int loffset, int llength, R right, int roffset, int rlength);<a name="line.111"></a>
<span class="sourceLineNo">112</span> }<a name="line.112"></a>
<span class="sourceLineNo">113</span><a name="line.113"></a>
<span class="sourceLineNo">114</span> private static &lt;L, R&gt; int compareRows(L left, int loffset, int llength, R right, int roffset,<a name="line.114"></a>
<span class="sourceLineNo">115</span> int rlength, SearchDelimiter&lt;L&gt; searchLeft, SearchDelimiter&lt;R&gt; searchRight,<a name="line.115"></a>
<span class="sourceLineNo">116</span> SearchDelimiterInReverse&lt;L&gt; searchInReverseLeft,<a name="line.116"></a>
<span class="sourceLineNo">117</span> SearchDelimiterInReverse&lt;R&gt; searchInReverseRight, Compare&lt;L, R&gt; comparator) {<a name="line.117"></a>
<span class="sourceLineNo">118</span> int leftDelimiter = searchLeft.search(left, loffset, llength, HConstants.DELIMITER);<a name="line.118"></a>
<span class="sourceLineNo">119</span> int rightDelimiter = searchRight.search(right, roffset, rlength, HConstants.DELIMITER);<a name="line.119"></a>
<span class="sourceLineNo">120</span> // Compare up to the delimiter<a name="line.120"></a>
<span class="sourceLineNo">121</span> int lpart = (leftDelimiter &lt; 0 ? llength : leftDelimiter - loffset);<a name="line.121"></a>
<span class="sourceLineNo">122</span> int rpart = (rightDelimiter &lt; 0 ? rlength : rightDelimiter - roffset);<a name="line.122"></a>
<span class="sourceLineNo">123</span> int result = comparator.compareTo(left, loffset, lpart, right, roffset, rpart);<a name="line.123"></a>
<span class="sourceLineNo">124</span> if (result != 0) {<a name="line.124"></a>
<span class="sourceLineNo">125</span> return result;<a name="line.125"></a>
<span class="sourceLineNo">126</span> } else {<a name="line.126"></a>
<span class="sourceLineNo">127</span> if (leftDelimiter &lt; 0 &amp;&amp; rightDelimiter &gt;= 0) {<a name="line.127"></a>
<span class="sourceLineNo">128</span> return -1;<a name="line.128"></a>
<span class="sourceLineNo">129</span> } else if (rightDelimiter &lt; 0 &amp;&amp; leftDelimiter &gt;= 0) {<a name="line.129"></a>
<span class="sourceLineNo">130</span> return 1;<a name="line.130"></a>
<span class="sourceLineNo">131</span> } else if (leftDelimiter &lt; 0) {<a name="line.131"></a>
<span class="sourceLineNo">132</span> return 0;<a name="line.132"></a>
<span class="sourceLineNo">133</span> }<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span> // Compare middle bit of the row.<a name="line.135"></a>
<span class="sourceLineNo">136</span> // Move past delimiter<a name="line.136"></a>
<span class="sourceLineNo">137</span> leftDelimiter++;<a name="line.137"></a>
<span class="sourceLineNo">138</span> rightDelimiter++;<a name="line.138"></a>
<span class="sourceLineNo">139</span> int leftFarDelimiter = searchInReverseLeft.search(left, leftDelimiter,<a name="line.139"></a>
<span class="sourceLineNo">140</span> llength - (leftDelimiter - loffset), HConstants.DELIMITER);<a name="line.140"></a>
<span class="sourceLineNo">141</span> int rightFarDelimiter = searchInReverseRight.search(right, rightDelimiter,<a name="line.141"></a>
<span class="sourceLineNo">142</span> rlength - (rightDelimiter - roffset), HConstants.DELIMITER);<a name="line.142"></a>
<span class="sourceLineNo">143</span> // Now compare middlesection of row.<a name="line.143"></a>
<span class="sourceLineNo">144</span> lpart = (leftFarDelimiter &lt; 0 ? llength + loffset : leftFarDelimiter) - leftDelimiter;<a name="line.144"></a>
<span class="sourceLineNo">145</span> rpart = (rightFarDelimiter &lt; 0 ? rlength + roffset : rightFarDelimiter) - rightDelimiter;<a name="line.145"></a>
<span class="sourceLineNo">146</span> result = comparator.compareTo(left, leftDelimiter, lpart, right, rightDelimiter, rpart);<a name="line.146"></a>
<span class="sourceLineNo">147</span> if (result != 0) {<a name="line.147"></a>
<span class="sourceLineNo">148</span> return result;<a name="line.148"></a>
<span class="sourceLineNo">149</span> } else {<a name="line.149"></a>
<span class="sourceLineNo">150</span> if (leftDelimiter &lt; 0 &amp;&amp; rightDelimiter &gt;= 0) {<a name="line.150"></a>
<span class="sourceLineNo">151</span> return -1;<a name="line.151"></a>
<span class="sourceLineNo">152</span> } else if (rightDelimiter &lt; 0 &amp;&amp; leftDelimiter &gt;= 0) {<a name="line.152"></a>
<span class="sourceLineNo">153</span> return 1;<a name="line.153"></a>
<span class="sourceLineNo">154</span> } else if (leftDelimiter &lt; 0) {<a name="line.154"></a>
<span class="sourceLineNo">155</span> return 0;<a name="line.155"></a>
<span class="sourceLineNo">156</span> }<a name="line.156"></a>
<span class="sourceLineNo">157</span> }<a name="line.157"></a>
<span class="sourceLineNo">158</span> // Compare last part of row, the rowid.<a name="line.158"></a>
<span class="sourceLineNo">159</span> leftFarDelimiter++;<a name="line.159"></a>
<span class="sourceLineNo">160</span> rightFarDelimiter++;<a name="line.160"></a>
<span class="sourceLineNo">161</span> result = comparator.compareTo(left, leftFarDelimiter, llength - (leftFarDelimiter - loffset),<a name="line.161"></a>
<span class="sourceLineNo">162</span> right, rightFarDelimiter, rlength - (rightFarDelimiter - roffset));<a name="line.162"></a>
<span class="sourceLineNo">163</span> return result;<a name="line.163"></a>
<span class="sourceLineNo">164</span> }<a name="line.164"></a>
<span class="sourceLineNo">165</span><a name="line.165"></a>
<span class="sourceLineNo">166</span> private static int compareBBRows(ByteBuffer left, int loffset, int llength, ByteBuffer right,<a name="line.166"></a>
<span class="sourceLineNo">167</span> int roffset, int rlength) {<a name="line.167"></a>
<span class="sourceLineNo">168</span> if (left.hasArray()) {<a name="line.168"></a>
<span class="sourceLineNo">169</span> return -compareBBAndBytesRows(right, roffset, rlength, left.array(),<a name="line.169"></a>
<span class="sourceLineNo">170</span> left.arrayOffset() + loffset, llength);<a name="line.170"></a>
<span class="sourceLineNo">171</span> }<a name="line.171"></a>
<span class="sourceLineNo">172</span> if (right.hasArray()) {<a name="line.172"></a>
<span class="sourceLineNo">173</span> return compareBBAndBytesRows(left, loffset, llength, right.array(),<a name="line.173"></a>
<span class="sourceLineNo">174</span> right.arrayOffset() + roffset, rlength);<a name="line.174"></a>
<span class="sourceLineNo">175</span> }<a name="line.175"></a>
<span class="sourceLineNo">176</span> return compareRows(left, loffset, llength, right, roffset, rlength,<a name="line.176"></a>
<span class="sourceLineNo">177</span> ByteBufferUtils::searchDelimiterIndex, ByteBufferUtils::searchDelimiterIndex,<a name="line.177"></a>
<span class="sourceLineNo">178</span> ByteBufferUtils::searchDelimiterIndexInReverse,<a name="line.178"></a>
<span class="sourceLineNo">179</span> ByteBufferUtils::searchDelimiterIndexInReverse, ByteBufferUtils::compareTo);<a name="line.179"></a>
<span class="sourceLineNo">180</span> }<a name="line.180"></a>
<span class="sourceLineNo">181</span><a name="line.181"></a>
<span class="sourceLineNo">182</span> private static int compareBBAndBytesRows(ByteBuffer left, int loffset, int llength, byte[] right,<a name="line.182"></a>
<span class="sourceLineNo">183</span> int roffset, int rlength) {<a name="line.183"></a>
<span class="sourceLineNo">184</span> if (left.hasArray()) {<a name="line.184"></a>
<span class="sourceLineNo">185</span> return compareBytesRows(left.array(), left.arrayOffset() + loffset, llength, right, roffset,<a name="line.185"></a>
<span class="sourceLineNo">186</span> rlength);<a name="line.186"></a>
<span class="sourceLineNo">187</span> }<a name="line.187"></a>
<span class="sourceLineNo">188</span> return compareRows(left, loffset, llength, right, roffset, rlength,<a name="line.188"></a>
<span class="sourceLineNo">189</span> ByteBufferUtils::searchDelimiterIndex, Bytes::searchDelimiterIndex,<a name="line.189"></a>
<span class="sourceLineNo">190</span> ByteBufferUtils::searchDelimiterIndexInReverse, Bytes::searchDelimiterIndexInReverse,<a name="line.190"></a>
<span class="sourceLineNo">191</span> ByteBufferUtils::compareTo);<a name="line.191"></a>
<span class="sourceLineNo">192</span> }<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>
<span class="sourceLineNo">194</span> private static int compareBytesRows(byte[] left, int loffset, int llength, byte[] right,<a name="line.194"></a>
<span class="sourceLineNo">195</span> int roffset, int rlength) {<a name="line.195"></a>
<span class="sourceLineNo">196</span> return compareRows(left, loffset, llength, right, roffset, rlength, Bytes::searchDelimiterIndex,<a name="line.196"></a>
<span class="sourceLineNo">197</span> Bytes::searchDelimiterIndex, Bytes::searchDelimiterIndexInReverse,<a name="line.197"></a>
<span class="sourceLineNo">198</span> Bytes::searchDelimiterIndexInReverse, Bytes::compareTo);<a name="line.198"></a>
<span class="sourceLineNo">199</span> }<a name="line.199"></a>
<span class="sourceLineNo">200</span><a name="line.200"></a>
<span class="sourceLineNo">201</span> @Override<a name="line.201"></a>
<span class="sourceLineNo">202</span> public int compareRows(ByteBuffer row, Cell cell) {<a name="line.202"></a>
<span class="sourceLineNo">203</span> if (cell instanceof ByteBufferExtendedCell) {<a name="line.203"></a>
<span class="sourceLineNo">204</span> ByteBufferExtendedCell bbCell = (ByteBufferExtendedCell) cell;<a name="line.204"></a>
<span class="sourceLineNo">205</span> return compareBBRows(row, row.position(), row.remaining(), bbCell.getRowByteBuffer(),<a name="line.205"></a>
<span class="sourceLineNo">206</span> bbCell.getRowPosition(), cell.getRowLength());<a name="line.206"></a>
<span class="sourceLineNo">207</span> } else {<a name="line.207"></a>
<span class="sourceLineNo">208</span> return compareBBAndBytesRows(row, row.position(), row.remaining(), cell.getRowArray(),<a name="line.208"></a>
<span class="sourceLineNo">209</span> cell.getRowOffset(), cell.getRowLength());<a name="line.209"></a>
<span class="sourceLineNo">210</span> }<a name="line.210"></a>
<span class="sourceLineNo">211</span> }<a name="line.211"></a>
<span class="sourceLineNo">212</span><a name="line.212"></a>
<span class="sourceLineNo">213</span> @Override<a name="line.213"></a>
<span class="sourceLineNo">214</span> public Comparator getSimpleComparator() {<a name="line.214"></a>
<span class="sourceLineNo">215</span> return this;<a name="line.215"></a>
<span class="sourceLineNo">216</span> }<a name="line.216"></a>
<span class="sourceLineNo">217</span><a name="line.217"></a>
<span class="sourceLineNo">218</span>}<a name="line.218"></a>
</pre>
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