| <!DOCTYPE HTML> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc (17) --> |
| <title>Source code</title> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| <meta name="description" content="source: package: org.apache.hadoop.hbase.client, class: TableSnapshotScanner"> |
| <meta name="generator" content="javadoc/SourceToHTMLConverter"> |
| <link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body class="source-page"> |
| <main role="main"> |
| <div class="source-container"> |
| <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.client;</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.util.ArrayList;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.List;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.UUID;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.fs.FileSystem;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.fs.Path;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.PrivateCellUtil;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.snapshot.SnapshotManifest;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.util.CommonFSUtils;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.slf4j.Logger;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">035</span><span id="line-35"></span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotRegionManifest;</span> |
| <span class="source-line-no">039</span><span id="line-39"></span> |
| <span class="source-line-no">040</span><span id="line-40">/**</span> |
| <span class="source-line-no">041</span><span id="line-41"> * A Scanner which performs a scan over snapshot files. Using this class requires copying the</span> |
| <span class="source-line-no">042</span><span id="line-42"> * snapshot to a temporary empty directory, which will copy the snapshot reference files into that</span> |
| <span class="source-line-no">043</span><span id="line-43"> * directory. Actual data files are not copied.</span> |
| <span class="source-line-no">044</span><span id="line-44"> * <p></span> |
| <span class="source-line-no">045</span><span id="line-45"> * This also allows one to run the scan from an online or offline hbase cluster. The snapshot files</span> |
| <span class="source-line-no">046</span><span id="line-46"> * can be exported by using the org.apache.hadoop.hbase.snapshot.ExportSnapshot tool, to a pure-hdfs</span> |
| <span class="source-line-no">047</span><span id="line-47"> * cluster, and this scanner can be used to run the scan directly over the snapshot files. The</span> |
| <span class="source-line-no">048</span><span id="line-48"> * snapshot should not be deleted while there are open scanners reading from snapshot files.</span> |
| <span class="source-line-no">049</span><span id="line-49"> * <p></span> |
| <span class="source-line-no">050</span><span id="line-50"> * An internal RegionScanner is used to execute the {@link Scan} obtained from the user for each</span> |
| <span class="source-line-no">051</span><span id="line-51"> * region in the snapshot.</span> |
| <span class="source-line-no">052</span><span id="line-52"> * <p></span> |
| <span class="source-line-no">053</span><span id="line-53"> * HBase owns all the data and snapshot files on the filesystem. Only the HBase user can read from</span> |
| <span class="source-line-no">054</span><span id="line-54"> * snapshot files and data files. HBase also enforces security because all the requests are handled</span> |
| <span class="source-line-no">055</span><span id="line-55"> * by the server layer, and the user cannot read from the data files directly. To read from snapshot</span> |
| <span class="source-line-no">056</span><span id="line-56"> * files directly from the file system, the user who is running the MR job must have sufficient</span> |
| <span class="source-line-no">057</span><span id="line-57"> * permissions to access snapshot and reference files. This means that to run mapreduce over</span> |
| <span class="source-line-no">058</span><span id="line-58"> * snapshot files, the job has to be run as the HBase user or the user must have group or other</span> |
| <span class="source-line-no">059</span><span id="line-59"> * priviledges in the filesystem (See HBASE-8369). Note that, given other users access to read from</span> |
| <span class="source-line-no">060</span><span id="line-60"> * snapshot/data files will completely circumvent the access control enforced by HBase. See</span> |
| <span class="source-line-no">061</span><span id="line-61"> * org.apache.hadoop.hbase.mapreduce.TableSnapshotInputFormat.</span> |
| <span class="source-line-no">062</span><span id="line-62"> */</span> |
| <span class="source-line-no">063</span><span id="line-63">@InterfaceAudience.Private</span> |
| <span class="source-line-no">064</span><span id="line-64">public class TableSnapshotScanner extends AbstractClientScanner {</span> |
| <span class="source-line-no">065</span><span id="line-65"></span> |
| <span class="source-line-no">066</span><span id="line-66"> private static final Logger LOG = LoggerFactory.getLogger(TableSnapshotScanner.class);</span> |
| <span class="source-line-no">067</span><span id="line-67"></span> |
| <span class="source-line-no">068</span><span id="line-68"> private Configuration conf;</span> |
| <span class="source-line-no">069</span><span id="line-69"> private String snapshotName;</span> |
| <span class="source-line-no">070</span><span id="line-70"> private FileSystem fs;</span> |
| <span class="source-line-no">071</span><span id="line-71"> private Path rootDir;</span> |
| <span class="source-line-no">072</span><span id="line-72"> private Path restoreDir;</span> |
| <span class="source-line-no">073</span><span id="line-73"> private Scan scan;</span> |
| <span class="source-line-no">074</span><span id="line-74"> private ArrayList<RegionInfo> regions;</span> |
| <span class="source-line-no">075</span><span id="line-75"> private TableDescriptor htd;</span> |
| <span class="source-line-no">076</span><span id="line-76"> private final boolean snapshotAlreadyRestored;</span> |
| <span class="source-line-no">077</span><span id="line-77"></span> |
| <span class="source-line-no">078</span><span id="line-78"> private ClientSideRegionScanner currentRegionScanner = null;</span> |
| <span class="source-line-no">079</span><span id="line-79"> private int currentRegion = -1;</span> |
| <span class="source-line-no">080</span><span id="line-80"></span> |
| <span class="source-line-no">081</span><span id="line-81"> private int numOfCompleteRows = 0;</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> /**</span> |
| <span class="source-line-no">084</span><span id="line-84"> * Creates a TableSnapshotScanner.</span> |
| <span class="source-line-no">085</span><span id="line-85"> * @param conf the configuration</span> |
| <span class="source-line-no">086</span><span id="line-86"> * @param restoreDir a temporary directory to copy the snapshot files into. Current user should</span> |
| <span class="source-line-no">087</span><span id="line-87"> * have write permissions to this directory, and this should not be a</span> |
| <span class="source-line-no">088</span><span id="line-88"> * subdirectory of rootDir. The scanner deletes the contents of the directory</span> |
| <span class="source-line-no">089</span><span id="line-89"> * once the scanner is closed.</span> |
| <span class="source-line-no">090</span><span id="line-90"> * @param snapshotName the name of the snapshot to read from</span> |
| <span class="source-line-no">091</span><span id="line-91"> * @param scan a Scan representing scan parameters</span> |
| <span class="source-line-no">092</span><span id="line-92"> * @throws IOException in case of error</span> |
| <span class="source-line-no">093</span><span id="line-93"> */</span> |
| <span class="source-line-no">094</span><span id="line-94"> public TableSnapshotScanner(Configuration conf, Path restoreDir, String snapshotName, Scan scan)</span> |
| <span class="source-line-no">095</span><span id="line-95"> throws IOException {</span> |
| <span class="source-line-no">096</span><span id="line-96"> this(conf, CommonFSUtils.getRootDir(conf), restoreDir, snapshotName, scan);</span> |
| <span class="source-line-no">097</span><span id="line-97"> }</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> public TableSnapshotScanner(Configuration conf, Path rootDir, Path restoreDir,</span> |
| <span class="source-line-no">100</span><span id="line-100"> String snapshotName, Scan scan) throws IOException {</span> |
| <span class="source-line-no">101</span><span id="line-101"> this(conf, rootDir, restoreDir, snapshotName, scan, false);</span> |
| <span class="source-line-no">102</span><span id="line-102"> }</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> /**</span> |
| <span class="source-line-no">105</span><span id="line-105"> * Creates a TableSnapshotScanner.</span> |
| <span class="source-line-no">106</span><span id="line-106"> * @param conf the configuration</span> |
| <span class="source-line-no">107</span><span id="line-107"> * @param rootDir root directory for HBase.</span> |
| <span class="source-line-no">108</span><span id="line-108"> * @param restoreDir a temporary directory to copy the snapshot files into. Current</span> |
| <span class="source-line-no">109</span><span id="line-109"> * user should have write permissions to this directory, and this</span> |
| <span class="source-line-no">110</span><span id="line-110"> * should not be a subdirectory of rootdir. The scanner deletes the</span> |
| <span class="source-line-no">111</span><span id="line-111"> * contents of the directory once the scanner is closed.</span> |
| <span class="source-line-no">112</span><span id="line-112"> * @param snapshotName the name of the snapshot to read from</span> |
| <span class="source-line-no">113</span><span id="line-113"> * @param scan a Scan representing scan parameters</span> |
| <span class="source-line-no">114</span><span id="line-114"> * @param snapshotAlreadyRestored true to indicate that snapshot has been restored.</span> |
| <span class="source-line-no">115</span><span id="line-115"> * @throws IOException in case of error</span> |
| <span class="source-line-no">116</span><span id="line-116"> */</span> |
| <span class="source-line-no">117</span><span id="line-117"> public TableSnapshotScanner(Configuration conf, Path rootDir, Path restoreDir,</span> |
| <span class="source-line-no">118</span><span id="line-118"> String snapshotName, Scan scan, boolean snapshotAlreadyRestored) throws IOException {</span> |
| <span class="source-line-no">119</span><span id="line-119"> this.conf = conf;</span> |
| <span class="source-line-no">120</span><span id="line-120"> this.snapshotName = snapshotName;</span> |
| <span class="source-line-no">121</span><span id="line-121"> this.rootDir = rootDir;</span> |
| <span class="source-line-no">122</span><span id="line-122"> this.scan = scan;</span> |
| <span class="source-line-no">123</span><span id="line-123"> this.snapshotAlreadyRestored = snapshotAlreadyRestored;</span> |
| <span class="source-line-no">124</span><span id="line-124"> this.fs = rootDir.getFileSystem(conf);</span> |
| <span class="source-line-no">125</span><span id="line-125"></span> |
| <span class="source-line-no">126</span><span id="line-126"> if (snapshotAlreadyRestored) {</span> |
| <span class="source-line-no">127</span><span id="line-127"> this.restoreDir = restoreDir;</span> |
| <span class="source-line-no">128</span><span id="line-128"> openWithoutRestoringSnapshot();</span> |
| <span class="source-line-no">129</span><span id="line-129"> } else {</span> |
| <span class="source-line-no">130</span><span id="line-130"> // restoreDir will be deleted in close(), use a unique sub directory</span> |
| <span class="source-line-no">131</span><span id="line-131"> this.restoreDir = new Path(restoreDir, UUID.randomUUID().toString());</span> |
| <span class="source-line-no">132</span><span id="line-132"> openWithRestoringSnapshot();</span> |
| <span class="source-line-no">133</span><span id="line-133"> }</span> |
| <span class="source-line-no">134</span><span id="line-134"></span> |
| <span class="source-line-no">135</span><span id="line-135"> initScanMetrics(scan);</span> |
| <span class="source-line-no">136</span><span id="line-136"> }</span> |
| <span class="source-line-no">137</span><span id="line-137"></span> |
| <span class="source-line-no">138</span><span id="line-138"> private void openWithoutRestoringSnapshot() throws IOException {</span> |
| <span class="source-line-no">139</span><span id="line-139"> Path snapshotDir = SnapshotDescriptionUtils.getCompletedSnapshotDir(snapshotName, rootDir);</span> |
| <span class="source-line-no">140</span><span id="line-140"> SnapshotProtos.SnapshotDescription snapshotDesc =</span> |
| <span class="source-line-no">141</span><span id="line-141"> SnapshotDescriptionUtils.readSnapshotInfo(fs, snapshotDir);</span> |
| <span class="source-line-no">142</span><span id="line-142"></span> |
| <span class="source-line-no">143</span><span id="line-143"> SnapshotManifest manifest = SnapshotManifest.open(conf, fs, snapshotDir, snapshotDesc);</span> |
| <span class="source-line-no">144</span><span id="line-144"> List<SnapshotRegionManifest> regionManifests = manifest.getRegionManifests();</span> |
| <span class="source-line-no">145</span><span id="line-145"> if (regionManifests == null) {</span> |
| <span class="source-line-no">146</span><span id="line-146"> throw new IllegalArgumentException("Snapshot seems empty, snapshotName: " + snapshotName);</span> |
| <span class="source-line-no">147</span><span id="line-147"> }</span> |
| <span class="source-line-no">148</span><span id="line-148"></span> |
| <span class="source-line-no">149</span><span id="line-149"> regions = new ArrayList<>(regionManifests.size());</span> |
| <span class="source-line-no">150</span><span id="line-150"> regionManifests.stream().map(r -> ProtobufUtil.toRegionInfo(r.getRegionInfo()))</span> |
| <span class="source-line-no">151</span><span id="line-151"> .filter(this::isValidRegion).sorted().forEach(r -> regions.add(r));</span> |
| <span class="source-line-no">152</span><span id="line-152"> htd = manifest.getTableDescriptor();</span> |
| <span class="source-line-no">153</span><span id="line-153"> }</span> |
| <span class="source-line-no">154</span><span id="line-154"></span> |
| <span class="source-line-no">155</span><span id="line-155"> private boolean isValidRegion(RegionInfo hri) {</span> |
| <span class="source-line-no">156</span><span id="line-156"> // An offline split parent region should be excluded.</span> |
| <span class="source-line-no">157</span><span id="line-157"> if (hri.isOffline() && (hri.isSplit() || hri.isSplitParent())) {</span> |
| <span class="source-line-no">158</span><span id="line-158"> return false;</span> |
| <span class="source-line-no">159</span><span id="line-159"> }</span> |
| <span class="source-line-no">160</span><span id="line-160"> return PrivateCellUtil.overlappingKeys(scan.getStartRow(), scan.getStopRow(), hri.getStartKey(),</span> |
| <span class="source-line-no">161</span><span id="line-161"> hri.getEndKey());</span> |
| <span class="source-line-no">162</span><span id="line-162"> }</span> |
| <span class="source-line-no">163</span><span id="line-163"></span> |
| <span class="source-line-no">164</span><span id="line-164"> private void openWithRestoringSnapshot() throws IOException {</span> |
| <span class="source-line-no">165</span><span id="line-165"> final RestoreSnapshotHelper.RestoreMetaChanges meta =</span> |
| <span class="source-line-no">166</span><span id="line-166"> RestoreSnapshotHelper.copySnapshotForScanner(conf, fs, rootDir, restoreDir, snapshotName);</span> |
| <span class="source-line-no">167</span><span id="line-167"> final List<RegionInfo> restoredRegions = meta.getRegionsToAdd();</span> |
| <span class="source-line-no">168</span><span id="line-168"></span> |
| <span class="source-line-no">169</span><span id="line-169"> htd = meta.getTableDescriptor();</span> |
| <span class="source-line-no">170</span><span id="line-170"> regions = new ArrayList<>(restoredRegions.size());</span> |
| <span class="source-line-no">171</span><span id="line-171"> restoredRegions.stream().filter(this::isValidRegion).sorted().forEach(r -> regions.add(r));</span> |
| <span class="source-line-no">172</span><span id="line-172"> }</span> |
| <span class="source-line-no">173</span><span id="line-173"></span> |
| <span class="source-line-no">174</span><span id="line-174"> @Override</span> |
| <span class="source-line-no">175</span><span id="line-175"> public Result next() throws IOException {</span> |
| <span class="source-line-no">176</span><span id="line-176"> Result result = null;</span> |
| <span class="source-line-no">177</span><span id="line-177"> while (true) {</span> |
| <span class="source-line-no">178</span><span id="line-178"> if (currentRegionScanner == null) {</span> |
| <span class="source-line-no">179</span><span id="line-179"> currentRegion++;</span> |
| <span class="source-line-no">180</span><span id="line-180"> if (currentRegion >= regions.size()) {</span> |
| <span class="source-line-no">181</span><span id="line-181"> return null;</span> |
| <span class="source-line-no">182</span><span id="line-182"> }</span> |
| <span class="source-line-no">183</span><span id="line-183"></span> |
| <span class="source-line-no">184</span><span id="line-184"> RegionInfo hri = regions.get(currentRegion);</span> |
| <span class="source-line-no">185</span><span id="line-185"> currentRegionScanner =</span> |
| <span class="source-line-no">186</span><span id="line-186"> new ClientSideRegionScanner(conf, fs, restoreDir, htd, hri, scan, scanMetrics);</span> |
| <span class="source-line-no">187</span><span id="line-187"> if (this.scanMetrics != null) {</span> |
| <span class="source-line-no">188</span><span id="line-188"> this.scanMetrics.countOfRegions.incrementAndGet();</span> |
| <span class="source-line-no">189</span><span id="line-189"> }</span> |
| <span class="source-line-no">190</span><span id="line-190"> }</span> |
| <span class="source-line-no">191</span><span id="line-191"></span> |
| <span class="source-line-no">192</span><span id="line-192"> try {</span> |
| <span class="source-line-no">193</span><span id="line-193"> result = currentRegionScanner.next();</span> |
| <span class="source-line-no">194</span><span id="line-194"> if (result != null) {</span> |
| <span class="source-line-no">195</span><span id="line-195"> if (scan.getLimit() > 0 && ++this.numOfCompleteRows > scan.getLimit()) {</span> |
| <span class="source-line-no">196</span><span id="line-196"> result = null;</span> |
| <span class="source-line-no">197</span><span id="line-197"> }</span> |
| <span class="source-line-no">198</span><span id="line-198"> return result;</span> |
| <span class="source-line-no">199</span><span id="line-199"> }</span> |
| <span class="source-line-no">200</span><span id="line-200"> } finally {</span> |
| <span class="source-line-no">201</span><span id="line-201"> if (result == null) {</span> |
| <span class="source-line-no">202</span><span id="line-202"> currentRegionScanner.close();</span> |
| <span class="source-line-no">203</span><span id="line-203"> currentRegionScanner = null;</span> |
| <span class="source-line-no">204</span><span id="line-204"> }</span> |
| <span class="source-line-no">205</span><span id="line-205"> }</span> |
| <span class="source-line-no">206</span><span id="line-206"> }</span> |
| <span class="source-line-no">207</span><span id="line-207"> }</span> |
| <span class="source-line-no">208</span><span id="line-208"></span> |
| <span class="source-line-no">209</span><span id="line-209"> private void cleanup() {</span> |
| <span class="source-line-no">210</span><span id="line-210"> try {</span> |
| <span class="source-line-no">211</span><span id="line-211"> if (fs.exists(this.restoreDir)) {</span> |
| <span class="source-line-no">212</span><span id="line-212"> if (!fs.delete(this.restoreDir, true)) {</span> |
| <span class="source-line-no">213</span><span id="line-213"> LOG.warn(</span> |
| <span class="source-line-no">214</span><span id="line-214"> "Delete restore directory for the snapshot failed. restoreDir: " + this.restoreDir);</span> |
| <span class="source-line-no">215</span><span id="line-215"> }</span> |
| <span class="source-line-no">216</span><span id="line-216"> }</span> |
| <span class="source-line-no">217</span><span id="line-217"> } catch (IOException ex) {</span> |
| <span class="source-line-no">218</span><span id="line-218"> LOG.warn(</span> |
| <span class="source-line-no">219</span><span id="line-219"> "Could not delete restore directory for the snapshot. restoreDir: " + this.restoreDir, ex);</span> |
| <span class="source-line-no">220</span><span id="line-220"> }</span> |
| <span class="source-line-no">221</span><span id="line-221"> }</span> |
| <span class="source-line-no">222</span><span id="line-222"></span> |
| <span class="source-line-no">223</span><span id="line-223"> @Override</span> |
| <span class="source-line-no">224</span><span id="line-224"> public void close() {</span> |
| <span class="source-line-no">225</span><span id="line-225"> if (currentRegionScanner != null) {</span> |
| <span class="source-line-no">226</span><span id="line-226"> currentRegionScanner.close();</span> |
| <span class="source-line-no">227</span><span id="line-227"> }</span> |
| <span class="source-line-no">228</span><span id="line-228"> // if snapshotAlreadyRestored is true, then we should invoke cleanup() method by hand.</span> |
| <span class="source-line-no">229</span><span id="line-229"> if (!this.snapshotAlreadyRestored) {</span> |
| <span class="source-line-no">230</span><span id="line-230"> cleanup();</span> |
| <span class="source-line-no">231</span><span id="line-231"> }</span> |
| <span class="source-line-no">232</span><span id="line-232"> }</span> |
| <span class="source-line-no">233</span><span id="line-233"></span> |
| <span class="source-line-no">234</span><span id="line-234"> @Override</span> |
| <span class="source-line-no">235</span><span id="line-235"> public boolean renewLease() {</span> |
| <span class="source-line-no">236</span><span id="line-236"> throw new UnsupportedOperationException();</span> |
| <span class="source-line-no">237</span><span id="line-237"> }</span> |
| <span class="source-line-no">238</span><span id="line-238"></span> |
| <span class="source-line-no">239</span><span id="line-239">}</span> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
