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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.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.util.Collections;</span>
<span class="source-line-no">021</span><span id="line-21">import java.util.Map;</span>
<span class="source-line-no">022</span><span id="line-22">import java.util.Set;</span>
<span class="source-line-no">023</span><span id="line-23">import java.util.TreeMap;</span>
<span class="source-line-no">024</span><span id="line-24">import java.util.TreeSet;</span>
<span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.util.Bytes;</span>
<span class="source-line-no">026</span><span id="line-26">import org.apache.yetus.audience.InterfaceAudience;</span>
<span class="source-line-no">027</span><span id="line-27"></span>
<span class="source-line-no">028</span><span id="line-28">import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;</span>
<span class="source-line-no">029</span><span id="line-29"></span>
<span class="source-line-no">030</span><span id="line-30">@InterfaceAudience.Public</span>
<span class="source-line-no">031</span><span id="line-31">public final class TableDescriptorUtils {</span>
<span class="source-line-no">032</span><span id="line-32"> public final static class TableDescriptorDelta {</span>
<span class="source-line-no">033</span><span id="line-33"> private final Set&lt;byte[]&gt; columnsAdded;</span>
<span class="source-line-no">034</span><span id="line-34"> private final Set&lt;byte[]&gt; columnsDeleted;</span>
<span class="source-line-no">035</span><span id="line-35"> private final Set&lt;byte[]&gt; columnsModified;</span>
<span class="source-line-no">036</span><span id="line-36"></span>
<span class="source-line-no">037</span><span id="line-37"> private TableDescriptorDelta(TableDescriptor oldTD, TableDescriptor newTD) {</span>
<span class="source-line-no">038</span><span id="line-38"> Preconditions.checkNotNull(oldTD);</span>
<span class="source-line-no">039</span><span id="line-39"> Preconditions.checkNotNull(newTD);</span>
<span class="source-line-no">040</span><span id="line-40"></span>
<span class="source-line-no">041</span><span id="line-41"> Map&lt;byte[], ColumnFamilyDescriptor&gt; oldCFs = new TreeMap&lt;&gt;(Bytes.BYTES_COMPARATOR);</span>
<span class="source-line-no">042</span><span id="line-42"> Set&lt;byte[]&gt; newCFs = new TreeSet&lt;&gt;(Bytes.BYTES_COMPARATOR);</span>
<span class="source-line-no">043</span><span id="line-43"></span>
<span class="source-line-no">044</span><span id="line-44"> // CFD -&gt; (name, CFD)</span>
<span class="source-line-no">045</span><span id="line-45"> for (ColumnFamilyDescriptor cfd : oldTD.getColumnFamilies()) {</span>
<span class="source-line-no">046</span><span id="line-46"> oldCFs.put(cfd.getName(), cfd);</span>
<span class="source-line-no">047</span><span id="line-47"> }</span>
<span class="source-line-no">048</span><span id="line-48"></span>
<span class="source-line-no">049</span><span id="line-49"> Set&lt;byte[]&gt; added = new TreeSet&lt;&gt;(Bytes.BYTES_COMPARATOR);</span>
<span class="source-line-no">050</span><span id="line-50"> Set&lt;byte[]&gt; modified = new TreeSet&lt;&gt;(Bytes.BYTES_COMPARATOR);</span>
<span class="source-line-no">051</span><span id="line-51"></span>
<span class="source-line-no">052</span><span id="line-52"> for (ColumnFamilyDescriptor cfd : newTD.getColumnFamilies()) {</span>
<span class="source-line-no">053</span><span id="line-53"> byte[] cfName = cfd.getName();</span>
<span class="source-line-no">054</span><span id="line-54"> newCFs.add(cfName);</span>
<span class="source-line-no">055</span><span id="line-55"></span>
<span class="source-line-no">056</span><span id="line-56"> if (!oldCFs.containsKey(cfName)) {</span>
<span class="source-line-no">057</span><span id="line-57"> // If column family is in newTD but not oldTD, then it was added</span>
<span class="source-line-no">058</span><span id="line-58"> added.add(cfName);</span>
<span class="source-line-no">059</span><span id="line-59"> } else if (!cfd.equals(oldCFs.get(cfName))) {</span>
<span class="source-line-no">060</span><span id="line-60"> // If column family is in both, but not equal, then it was modified</span>
<span class="source-line-no">061</span><span id="line-61"> modified.add(cfName);</span>
<span class="source-line-no">062</span><span id="line-62"> }</span>
<span class="source-line-no">063</span><span id="line-63"> }</span>
<span class="source-line-no">064</span><span id="line-64"></span>
<span class="source-line-no">065</span><span id="line-65"> // If column family is in oldTD, but not in newTD, then it got deleted.</span>
<span class="source-line-no">066</span><span id="line-66"> Set&lt;byte[]&gt; deleted = oldCFs.keySet();</span>
<span class="source-line-no">067</span><span id="line-67"> deleted.removeAll(newCFs);</span>
<span class="source-line-no">068</span><span id="line-68"></span>
<span class="source-line-no">069</span><span id="line-69"> columnsAdded = Collections.unmodifiableSet(added);</span>
<span class="source-line-no">070</span><span id="line-70"> columnsDeleted = Collections.unmodifiableSet(deleted);</span>
<span class="source-line-no">071</span><span id="line-71"> columnsModified = Collections.unmodifiableSet(modified);</span>
<span class="source-line-no">072</span><span id="line-72"> }</span>
<span class="source-line-no">073</span><span id="line-73"></span>
<span class="source-line-no">074</span><span id="line-74"> public Set&lt;byte[]&gt; getColumnsAdded() {</span>
<span class="source-line-no">075</span><span id="line-75"> return columnsAdded;</span>
<span class="source-line-no">076</span><span id="line-76"> }</span>
<span class="source-line-no">077</span><span id="line-77"></span>
<span class="source-line-no">078</span><span id="line-78"> public Set&lt;byte[]&gt; getColumnsDeleted() {</span>
<span class="source-line-no">079</span><span id="line-79"> return columnsDeleted;</span>
<span class="source-line-no">080</span><span id="line-80"> }</span>
<span class="source-line-no">081</span><span id="line-81"></span>
<span class="source-line-no">082</span><span id="line-82"> public Set&lt;byte[]&gt; getColumnsModified() {</span>
<span class="source-line-no">083</span><span id="line-83"> return columnsModified;</span>
<span class="source-line-no">084</span><span id="line-84"> }</span>
<span class="source-line-no">085</span><span id="line-85"> }</span>
<span class="source-line-no">086</span><span id="line-86"></span>
<span class="source-line-no">087</span><span id="line-87"> private TableDescriptorUtils() {</span>
<span class="source-line-no">088</span><span id="line-88"> }</span>
<span class="source-line-no">089</span><span id="line-89"></span>
<span class="source-line-no">090</span><span id="line-90"> /**</span>
<span class="source-line-no">091</span><span id="line-91"> * Compares two {@link TableDescriptor} and indicate which columns were added, deleted, or</span>
<span class="source-line-no">092</span><span id="line-92"> * modified from oldTD to newTD</span>
<span class="source-line-no">093</span><span id="line-93"> * @return a TableDescriptorDelta that contains the added/deleted/modified column names</span>
<span class="source-line-no">094</span><span id="line-94"> */</span>
<span class="source-line-no">095</span><span id="line-95"> public static TableDescriptorDelta computeDelta(TableDescriptor oldTD, TableDescriptor newTD) {</span>
<span class="source-line-no">096</span><span id="line-96"> return new TableDescriptorDelta(oldTD, newTD);</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>
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