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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.util;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.OutputStream;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.ArrayList;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.Collection;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">025</span><span id="line-25"></span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hbase.thirdparty.com.google.common.collect.Lists;</span> |
| <span class="source-line-no">027</span><span id="line-27"></span> |
| <span class="source-line-no">028</span><span id="line-28">/**</span> |
| <span class="source-line-no">029</span><span id="line-29"> * Utility methods for working with {@link ByteRange}.</span> |
| <span class="source-line-no">030</span><span id="line-30"> */</span> |
| <span class="source-line-no">031</span><span id="line-31">@InterfaceAudience.Public</span> |
| <span class="source-line-no">032</span><span id="line-32">public class ByteRangeUtils {</span> |
| <span class="source-line-no">033</span><span id="line-33"> public static int numEqualPrefixBytes(ByteRange left, ByteRange right, int rightInnerOffset) {</span> |
| <span class="source-line-no">034</span><span id="line-34"> int maxCompares = Math.min(left.getLength(), right.getLength() - rightInnerOffset);</span> |
| <span class="source-line-no">035</span><span id="line-35"> final byte[] lbytes = left.getBytes();</span> |
| <span class="source-line-no">036</span><span id="line-36"> final byte[] rbytes = right.getBytes();</span> |
| <span class="source-line-no">037</span><span id="line-37"> final int loffset = left.getOffset();</span> |
| <span class="source-line-no">038</span><span id="line-38"> final int roffset = right.getOffset();</span> |
| <span class="source-line-no">039</span><span id="line-39"> for (int i = 0; i < maxCompares; ++i) {</span> |
| <span class="source-line-no">040</span><span id="line-40"> if (lbytes[loffset + i] != rbytes[roffset + rightInnerOffset + i]) {</span> |
| <span class="source-line-no">041</span><span id="line-41"> return i;</span> |
| <span class="source-line-no">042</span><span id="line-42"> }</span> |
| <span class="source-line-no">043</span><span id="line-43"> }</span> |
| <span class="source-line-no">044</span><span id="line-44"> return maxCompares;</span> |
| <span class="source-line-no">045</span><span id="line-45"> }</span> |
| <span class="source-line-no">046</span><span id="line-46"></span> |
| <span class="source-line-no">047</span><span id="line-47"> public static ArrayList<byte[]> copyToNewArrays(Collection<ByteRange> ranges) {</span> |
| <span class="source-line-no">048</span><span id="line-48"> if (ranges == null) {</span> |
| <span class="source-line-no">049</span><span id="line-49"> return new ArrayList<>(0);</span> |
| <span class="source-line-no">050</span><span id="line-50"> }</span> |
| <span class="source-line-no">051</span><span id="line-51"> ArrayList<byte[]> arrays = Lists.newArrayListWithCapacity(ranges.size());</span> |
| <span class="source-line-no">052</span><span id="line-52"> for (ByteRange range : ranges) {</span> |
| <span class="source-line-no">053</span><span id="line-53"> arrays.add(range.deepCopyToNewArray());</span> |
| <span class="source-line-no">054</span><span id="line-54"> }</span> |
| <span class="source-line-no">055</span><span id="line-55"> return arrays;</span> |
| <span class="source-line-no">056</span><span id="line-56"> }</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58"> public static ArrayList<ByteRange> fromArrays(Collection<byte[]> arrays) {</span> |
| <span class="source-line-no">059</span><span id="line-59"> if (arrays == null) {</span> |
| <span class="source-line-no">060</span><span id="line-60"> return new ArrayList<>(0);</span> |
| <span class="source-line-no">061</span><span id="line-61"> }</span> |
| <span class="source-line-no">062</span><span id="line-62"> ArrayList<ByteRange> ranges = Lists.newArrayListWithCapacity(arrays.size());</span> |
| <span class="source-line-no">063</span><span id="line-63"> for (byte[] array : arrays) {</span> |
| <span class="source-line-no">064</span><span id="line-64"> ranges.add(new SimpleMutableByteRange(array));</span> |
| <span class="source-line-no">065</span><span id="line-65"> }</span> |
| <span class="source-line-no">066</span><span id="line-66"> return ranges;</span> |
| <span class="source-line-no">067</span><span id="line-67"> }</span> |
| <span class="source-line-no">068</span><span id="line-68"></span> |
| <span class="source-line-no">069</span><span id="line-69"> public static void write(OutputStream os, ByteRange byteRange) throws IOException {</span> |
| <span class="source-line-no">070</span><span id="line-70"> os.write(byteRange.getBytes(), byteRange.getOffset(), byteRange.getLength());</span> |
| <span class="source-line-no">071</span><span id="line-71"> }</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> public static void write(OutputStream os, ByteRange byteRange, int byteRangeInnerOffset)</span> |
| <span class="source-line-no">074</span><span id="line-74"> throws IOException {</span> |
| <span class="source-line-no">075</span><span id="line-75"> os.write(byteRange.getBytes(), byteRange.getOffset() + byteRangeInnerOffset,</span> |
| <span class="source-line-no">076</span><span id="line-76"> byteRange.getLength() - byteRangeInnerOffset);</span> |
| <span class="source-line-no">077</span><span id="line-77"> }</span> |
| <span class="source-line-no">078</span><span id="line-78">}</span> |
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