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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;</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.math.BigDecimal;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.Objects;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">023</span><span id="line-23"></span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;</span> |
| <span class="source-line-no">025</span><span id="line-25"></span> |
| <span class="source-line-no">026</span><span id="line-26">/**</span> |
| <span class="source-line-no">027</span><span id="line-27"> * It is used to represent the size with different units. This class doesn't serve for the precise</span> |
| <span class="source-line-no">028</span><span id="line-28"> * computation.</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 Size implements Comparable<Size> {</span> |
| <span class="source-line-no">032</span><span id="line-32"> public static final Size ZERO = new Size(0, Unit.KILOBYTE);</span> |
| <span class="source-line-no">033</span><span id="line-33"> private static final BigDecimal SCALE_BASE = BigDecimal.valueOf(1024D);</span> |
| <span class="source-line-no">034</span><span id="line-34"></span> |
| <span class="source-line-no">035</span><span id="line-35"> public enum Unit {</span> |
| <span class="source-line-no">036</span><span id="line-36"> // keep the room to add more units for HBase 10.x</span> |
| <span class="source-line-no">037</span><span id="line-37"> PETABYTE(100, "PB"),</span> |
| <span class="source-line-no">038</span><span id="line-38"> TERABYTE(99, "TB"),</span> |
| <span class="source-line-no">039</span><span id="line-39"> GIGABYTE(98, "GB"),</span> |
| <span class="source-line-no">040</span><span id="line-40"> MEGABYTE(97, "MB"),</span> |
| <span class="source-line-no">041</span><span id="line-41"> KILOBYTE(96, "KB"),</span> |
| <span class="source-line-no">042</span><span id="line-42"> BYTE(95, "B");</span> |
| <span class="source-line-no">043</span><span id="line-43"></span> |
| <span class="source-line-no">044</span><span id="line-44"> private final int orderOfSize;</span> |
| <span class="source-line-no">045</span><span id="line-45"> private final String simpleName;</span> |
| <span class="source-line-no">046</span><span id="line-46"></span> |
| <span class="source-line-no">047</span><span id="line-47"> Unit(int orderOfSize, String simpleName) {</span> |
| <span class="source-line-no">048</span><span id="line-48"> this.orderOfSize = orderOfSize;</span> |
| <span class="source-line-no">049</span><span id="line-49"> this.simpleName = simpleName;</span> |
| <span class="source-line-no">050</span><span id="line-50"> }</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> public int getOrderOfSize() {</span> |
| <span class="source-line-no">053</span><span id="line-53"> return orderOfSize;</span> |
| <span class="source-line-no">054</span><span id="line-54"> }</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> public String getSimpleName() {</span> |
| <span class="source-line-no">057</span><span id="line-57"> return simpleName;</span> |
| <span class="source-line-no">058</span><span id="line-58"> }</span> |
| <span class="source-line-no">059</span><span id="line-59"> }</span> |
| <span class="source-line-no">060</span><span id="line-60"></span> |
| <span class="source-line-no">061</span><span id="line-61"> private final double value;</span> |
| <span class="source-line-no">062</span><span id="line-62"> private final Unit unit;</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> public Size(double value, Unit unit) {</span> |
| <span class="source-line-no">065</span><span id="line-65"> if (value < 0) {</span> |
| <span class="source-line-no">066</span><span id="line-66"> throw new IllegalArgumentException("The value:" + value + " can't be negative");</span> |
| <span class="source-line-no">067</span><span id="line-67"> }</span> |
| <span class="source-line-no">068</span><span id="line-68"> this.value = value;</span> |
| <span class="source-line-no">069</span><span id="line-69"> this.unit = Preconditions.checkNotNull(unit);</span> |
| <span class="source-line-no">070</span><span id="line-70"> }</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> /** Returns size unit */</span> |
| <span class="source-line-no">073</span><span id="line-73"> public Unit getUnit() {</span> |
| <span class="source-line-no">074</span><span id="line-74"> return unit;</span> |
| <span class="source-line-no">075</span><span id="line-75"> }</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"> * get the value</span> |
| <span class="source-line-no">079</span><span id="line-79"> */</span> |
| <span class="source-line-no">080</span><span id="line-80"> public long getLongValue() {</span> |
| <span class="source-line-no">081</span><span id="line-81"> return (long) value;</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"> /**</span> |
| <span class="source-line-no">085</span><span id="line-85"> * get the value</span> |
| <span class="source-line-no">086</span><span id="line-86"> */</span> |
| <span class="source-line-no">087</span><span id="line-87"> public double get() {</span> |
| <span class="source-line-no">088</span><span id="line-88"> return value;</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"> /**</span> |
| <span class="source-line-no">092</span><span id="line-92"> * get the value which is converted to specified unit.</span> |
| <span class="source-line-no">093</span><span id="line-93"> * @param unit size unit</span> |
| <span class="source-line-no">094</span><span id="line-94"> * @return the converted value</span> |
| <span class="source-line-no">095</span><span id="line-95"> */</span> |
| <span class="source-line-no">096</span><span id="line-96"> public double get(Unit unit) {</span> |
| <span class="source-line-no">097</span><span id="line-97"> if (value == 0) {</span> |
| <span class="source-line-no">098</span><span id="line-98"> return value;</span> |
| <span class="source-line-no">099</span><span id="line-99"> }</span> |
| <span class="source-line-no">100</span><span id="line-100"> int diff = this.unit.getOrderOfSize() - unit.getOrderOfSize();</span> |
| <span class="source-line-no">101</span><span id="line-101"> if (diff == 0) {</span> |
| <span class="source-line-no">102</span><span id="line-102"> return value;</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"> BigDecimal rval = BigDecimal.valueOf(value);</span> |
| <span class="source-line-no">106</span><span id="line-106"> for (int i = 0; i != Math.abs(diff); ++i) {</span> |
| <span class="source-line-no">107</span><span id="line-107"> rval = diff > 0 ? rval.multiply(SCALE_BASE) : rval.divide(SCALE_BASE);</span> |
| <span class="source-line-no">108</span><span id="line-108"> }</span> |
| <span class="source-line-no">109</span><span id="line-109"> return rval.doubleValue();</span> |
| <span class="source-line-no">110</span><span id="line-110"> }</span> |
| <span class="source-line-no">111</span><span id="line-111"></span> |
| <span class="source-line-no">112</span><span id="line-112"> @Override</span> |
| <span class="source-line-no">113</span><span id="line-113"> public int compareTo(Size other) {</span> |
| <span class="source-line-no">114</span><span id="line-114"> int diff = unit.getOrderOfSize() - other.unit.getOrderOfSize();</span> |
| <span class="source-line-no">115</span><span id="line-115"> if (diff == 0) {</span> |
| <span class="source-line-no">116</span><span id="line-116"> return Double.compare(value, other.value);</span> |
| <span class="source-line-no">117</span><span id="line-117"> }</span> |
| <span class="source-line-no">118</span><span id="line-118"></span> |
| <span class="source-line-no">119</span><span id="line-119"> BigDecimal thisValue = BigDecimal.valueOf(value);</span> |
| <span class="source-line-no">120</span><span id="line-120"> BigDecimal otherValue = BigDecimal.valueOf(other.value);</span> |
| <span class="source-line-no">121</span><span id="line-121"> if (diff > 0) {</span> |
| <span class="source-line-no">122</span><span id="line-122"> for (int i = 0; i != Math.abs(diff); ++i) {</span> |
| <span class="source-line-no">123</span><span id="line-123"> thisValue = thisValue.multiply(SCALE_BASE);</span> |
| <span class="source-line-no">124</span><span id="line-124"> }</span> |
| <span class="source-line-no">125</span><span id="line-125"> } else {</span> |
| <span class="source-line-no">126</span><span id="line-126"> for (int i = 0; i != Math.abs(diff); ++i) {</span> |
| <span class="source-line-no">127</span><span id="line-127"> otherValue = otherValue.multiply(SCALE_BASE);</span> |
| <span class="source-line-no">128</span><span id="line-128"> }</span> |
| <span class="source-line-no">129</span><span id="line-129"> }</span> |
| <span class="source-line-no">130</span><span id="line-130"> return thisValue.compareTo(otherValue);</span> |
| <span class="source-line-no">131</span><span id="line-131"> }</span> |
| <span class="source-line-no">132</span><span id="line-132"></span> |
| <span class="source-line-no">133</span><span id="line-133"> @Override</span> |
| <span class="source-line-no">134</span><span id="line-134"> public String toString() {</span> |
| <span class="source-line-no">135</span><span id="line-135"> return value + unit.getSimpleName();</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"> @Override</span> |
| <span class="source-line-no">139</span><span id="line-139"> public boolean equals(Object obj) {</span> |
| <span class="source-line-no">140</span><span id="line-140"> if (obj == null) {</span> |
| <span class="source-line-no">141</span><span id="line-141"> return false;</span> |
| <span class="source-line-no">142</span><span id="line-142"> }</span> |
| <span class="source-line-no">143</span><span id="line-143"> if (obj == this) {</span> |
| <span class="source-line-no">144</span><span id="line-144"> return true;</span> |
| <span class="source-line-no">145</span><span id="line-145"> }</span> |
| <span class="source-line-no">146</span><span id="line-146"> if (obj instanceof Size) {</span> |
| <span class="source-line-no">147</span><span id="line-147"> return compareTo((Size) obj) == 0;</span> |
| <span class="source-line-no">148</span><span id="line-148"> }</span> |
| <span class="source-line-no">149</span><span id="line-149"> return false;</span> |
| <span class="source-line-no">150</span><span id="line-150"> }</span> |
| <span class="source-line-no">151</span><span id="line-151"></span> |
| <span class="source-line-no">152</span><span id="line-152"> @Override</span> |
| <span class="source-line-no">153</span><span id="line-153"> public int hashCode() {</span> |
| <span class="source-line-no">154</span><span id="line-154"> return Objects.hash(value, unit);</span> |
| <span class="source-line-no">155</span><span id="line-155"> }</span> |
| <span class="source-line-no">156</span><span id="line-156">}</span> |
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| </pre> |
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