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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 edu.umd.cs.findbugs.annotations.NonNull;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.ByteArrayOutputStream;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.io.PrintStream;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.io.UnsupportedEncodingException;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.lang.invoke.CallSite;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.lang.invoke.LambdaMetafactory;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.lang.invoke.MethodHandle;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.lang.invoke.MethodHandles;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.lang.invoke.MethodType;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.lang.management.ManagementFactory;</span> |
| <span class="source-line-no">030</span><span id="line-30">import java.lang.management.ThreadInfo;</span> |
| <span class="source-line-no">031</span><span id="line-31">import java.lang.management.ThreadMXBean;</span> |
| <span class="source-line-no">032</span><span id="line-32">import java.lang.reflect.Constructor;</span> |
| <span class="source-line-no">033</span><span id="line-33">import java.lang.reflect.Field;</span> |
| <span class="source-line-no">034</span><span id="line-34">import java.lang.reflect.InvocationTargetException;</span> |
| <span class="source-line-no">035</span><span id="line-35">import java.lang.reflect.Method;</span> |
| <span class="source-line-no">036</span><span id="line-36">import java.nio.charset.Charset;</span> |
| <span class="source-line-no">037</span><span id="line-37">import java.util.function.Function;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.slf4j.Logger;</span> |
| <span class="source-line-no">040</span><span id="line-40"></span> |
| <span class="source-line-no">041</span><span id="line-41">@InterfaceAudience.Private</span> |
| <span class="source-line-no">042</span><span id="line-42">public class ReflectionUtils {</span> |
| <span class="source-line-no">043</span><span id="line-43"> @SuppressWarnings({ "unchecked", "TypeParameterUnusedInFormals" })</span> |
| <span class="source-line-no">044</span><span id="line-44"> public static <T> T instantiateWithCustomCtor(String className, Class<?>[] ctorArgTypes,</span> |
| <span class="source-line-no">045</span><span id="line-45"> Object[] ctorArgs) {</span> |
| <span class="source-line-no">046</span><span id="line-46"> try {</span> |
| <span class="source-line-no">047</span><span id="line-47"> Class<? extends T> resultType = (Class<? extends T>) Class.forName(className);</span> |
| <span class="source-line-no">048</span><span id="line-48"> Constructor<? extends T> ctor = resultType.getDeclaredConstructor(ctorArgTypes);</span> |
| <span class="source-line-no">049</span><span id="line-49"> return instantiate(className, ctor, ctorArgs);</span> |
| <span class="source-line-no">050</span><span id="line-50"> } catch (ClassNotFoundException e) {</span> |
| <span class="source-line-no">051</span><span id="line-51"> throw new UnsupportedOperationException("Unable to find " + className, e);</span> |
| <span class="source-line-no">052</span><span id="line-52"> } catch (NoSuchMethodException e) {</span> |
| <span class="source-line-no">053</span><span id="line-53"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">054</span><span id="line-54"> "Unable to find suitable constructor for class " + className, e);</span> |
| <span class="source-line-no">055</span><span id="line-55"> }</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 <T> T instantiate(final String className, Constructor<T> ctor, Object... ctorArgs) {</span> |
| <span class="source-line-no">059</span><span id="line-59"> try {</span> |
| <span class="source-line-no">060</span><span id="line-60"> ctor.setAccessible(true);</span> |
| <span class="source-line-no">061</span><span id="line-61"> return ctor.newInstance(ctorArgs);</span> |
| <span class="source-line-no">062</span><span id="line-62"> } catch (IllegalAccessException e) {</span> |
| <span class="source-line-no">063</span><span id="line-63"> throw new UnsupportedOperationException("Unable to access specified class " + className, e);</span> |
| <span class="source-line-no">064</span><span id="line-64"> } catch (InstantiationException e) {</span> |
| <span class="source-line-no">065</span><span id="line-65"> throw new UnsupportedOperationException("Unable to instantiate specified class " + className,</span> |
| <span class="source-line-no">066</span><span id="line-66"> e);</span> |
| <span class="source-line-no">067</span><span id="line-67"> } catch (InvocationTargetException e) {</span> |
| <span class="source-line-no">068</span><span id="line-68"> throw new UnsupportedOperationException("Constructor threw an exception for " + className, e);</span> |
| <span class="source-line-no">069</span><span id="line-69"> }</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"> @SuppressWarnings({ "unchecked", "TypeParameterUnusedInFormals" })</span> |
| <span class="source-line-no">073</span><span id="line-73"> public static <T> T newInstance(String className, Object... params) {</span> |
| <span class="source-line-no">074</span><span id="line-74"> Class<T> type;</span> |
| <span class="source-line-no">075</span><span id="line-75"> try {</span> |
| <span class="source-line-no">076</span><span id="line-76"> type = (Class<T>) getClassLoader().loadClass(className);</span> |
| <span class="source-line-no">077</span><span id="line-77"> } catch (ClassNotFoundException | ClassCastException e) {</span> |
| <span class="source-line-no">078</span><span id="line-78"> throw new UnsupportedOperationException("Unable to load specified class " + className, e);</span> |
| <span class="source-line-no">079</span><span id="line-79"> }</span> |
| <span class="source-line-no">080</span><span id="line-80"> return instantiate(type.getName(), findConstructor(type, params), params);</span> |
| <span class="source-line-no">081</span><span id="line-81"> }</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> public static ClassLoader getClassLoader() {</span> |
| <span class="source-line-no">084</span><span id="line-84"> ClassLoader cl = Thread.currentThread().getContextClassLoader();</span> |
| <span class="source-line-no">085</span><span id="line-85"> if (cl == null) {</span> |
| <span class="source-line-no">086</span><span id="line-86"> cl = ReflectionUtils.class.getClassLoader();</span> |
| <span class="source-line-no">087</span><span id="line-87"> }</span> |
| <span class="source-line-no">088</span><span id="line-88"> if (cl == null) {</span> |
| <span class="source-line-no">089</span><span id="line-89"> cl = ClassLoader.getSystemClassLoader();</span> |
| <span class="source-line-no">090</span><span id="line-90"> }</span> |
| <span class="source-line-no">091</span><span id="line-91"> if (cl == null) {</span> |
| <span class="source-line-no">092</span><span id="line-92"> throw new RuntimeException("A ClassLoader could not be found");</span> |
| <span class="source-line-no">093</span><span id="line-93"> }</span> |
| <span class="source-line-no">094</span><span id="line-94"> return cl;</span> |
| <span class="source-line-no">095</span><span id="line-95"> }</span> |
| <span class="source-line-no">096</span><span id="line-96"></span> |
| <span class="source-line-no">097</span><span id="line-97"> public static <T> T newInstance(Class<T> type, Object... params) {</span> |
| <span class="source-line-no">098</span><span id="line-98"> return instantiate(type.getName(), findConstructor(type, params), params);</span> |
| <span class="source-line-no">099</span><span id="line-99"> }</span> |
| <span class="source-line-no">100</span><span id="line-100"></span> |
| <span class="source-line-no">101</span><span id="line-101"> @SuppressWarnings("unchecked")</span> |
| <span class="source-line-no">102</span><span id="line-102"> public static <T> Constructor<T> findConstructor(Class<T> type, Object... paramTypes) {</span> |
| <span class="source-line-no">103</span><span id="line-103"> Constructor<T>[] constructors = (Constructor<T>[]) type.getDeclaredConstructors();</span> |
| <span class="source-line-no">104</span><span id="line-104"> for (Constructor<T> ctor : constructors) {</span> |
| <span class="source-line-no">105</span><span id="line-105"> Class<?>[] ctorParamTypes = ctor.getParameterTypes();</span> |
| <span class="source-line-no">106</span><span id="line-106"> if (ctorParamTypes.length != paramTypes.length) {</span> |
| <span class="source-line-no">107</span><span id="line-107"> continue;</span> |
| <span class="source-line-no">108</span><span id="line-108"> }</span> |
| <span class="source-line-no">109</span><span id="line-109"></span> |
| <span class="source-line-no">110</span><span id="line-110"> boolean match = true;</span> |
| <span class="source-line-no">111</span><span id="line-111"> for (int i = 0; i < ctorParamTypes.length && match; ++i) {</span> |
| <span class="source-line-no">112</span><span id="line-112"> if (paramTypes[i] == null) {</span> |
| <span class="source-line-no">113</span><span id="line-113"> match = !ctorParamTypes[i].isPrimitive();</span> |
| <span class="source-line-no">114</span><span id="line-114"> } else {</span> |
| <span class="source-line-no">115</span><span id="line-115"> Class<?> paramType = paramTypes[i].getClass();</span> |
| <span class="source-line-no">116</span><span id="line-116"> match = !ctorParamTypes[i].isPrimitive()</span> |
| <span class="source-line-no">117</span><span id="line-117"> ? ctorParamTypes[i].isAssignableFrom(paramType)</span> |
| <span class="source-line-no">118</span><span id="line-118"> : ((int.class.equals(ctorParamTypes[i]) && Integer.class.equals(paramType))</span> |
| <span class="source-line-no">119</span><span id="line-119"> || (long.class.equals(ctorParamTypes[i]) && Long.class.equals(paramType))</span> |
| <span class="source-line-no">120</span><span id="line-120"> || (double.class.equals(ctorParamTypes[i]) && Double.class.equals(paramType))</span> |
| <span class="source-line-no">121</span><span id="line-121"> || (char.class.equals(ctorParamTypes[i]) && Character.class.equals(paramType))</span> |
| <span class="source-line-no">122</span><span id="line-122"> || (short.class.equals(ctorParamTypes[i]) && Short.class.equals(paramType))</span> |
| <span class="source-line-no">123</span><span id="line-123"> || (boolean.class.equals(ctorParamTypes[i]) && Boolean.class.equals(paramType))</span> |
| <span class="source-line-no">124</span><span id="line-124"> || (byte.class.equals(ctorParamTypes[i]) && Byte.class.equals(paramType)));</span> |
| <span class="source-line-no">125</span><span id="line-125"> }</span> |
| <span class="source-line-no">126</span><span id="line-126"> }</span> |
| <span class="source-line-no">127</span><span id="line-127"></span> |
| <span class="source-line-no">128</span><span id="line-128"> if (match) {</span> |
| <span class="source-line-no">129</span><span id="line-129"> return ctor;</span> |
| <span class="source-line-no">130</span><span id="line-130"> }</span> |
| <span class="source-line-no">131</span><span id="line-131"> }</span> |
| <span class="source-line-no">132</span><span id="line-132"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">133</span><span id="line-133"> "Unable to find suitable constructor for class " + type.getName());</span> |
| <span class="source-line-no">134</span><span id="line-134"> }</span> |
| <span class="source-line-no">135</span><span id="line-135"></span> |
| <span class="source-line-no">136</span><span id="line-136"> /* synchronized on ReflectionUtils.class */</span> |
| <span class="source-line-no">137</span><span id="line-137"> private static long previousLogTime = 0;</span> |
| <span class="source-line-no">138</span><span id="line-138"> private static final ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();</span> |
| <span class="source-line-no">139</span><span id="line-139"></span> |
| <span class="source-line-no">140</span><span id="line-140"> /**</span> |
| <span class="source-line-no">141</span><span id="line-141"> * Log the current thread stacks at INFO level.</span> |
| <span class="source-line-no">142</span><span id="line-142"> * @param log the logger that logs the stack trace</span> |
| <span class="source-line-no">143</span><span id="line-143"> * @param title a descriptive title for the call stacks</span> |
| <span class="source-line-no">144</span><span id="line-144"> * @param minInterval the minimum time from the last</span> |
| <span class="source-line-no">145</span><span id="line-145"> */</span> |
| <span class="source-line-no">146</span><span id="line-146"> public static void logThreadInfo(Logger log, String title, long minInterval) {</span> |
| <span class="source-line-no">147</span><span id="line-147"> boolean dumpStack = false;</span> |
| <span class="source-line-no">148</span><span id="line-148"> if (log.isInfoEnabled()) {</span> |
| <span class="source-line-no">149</span><span id="line-149"> synchronized (ReflectionUtils.class) {</span> |
| <span class="source-line-no">150</span><span id="line-150"> long now = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">151</span><span id="line-151"> if (now - previousLogTime >= minInterval * 1000) {</span> |
| <span class="source-line-no">152</span><span id="line-152"> previousLogTime = now;</span> |
| <span class="source-line-no">153</span><span id="line-153"> dumpStack = true;</span> |
| <span class="source-line-no">154</span><span id="line-154"> }</span> |
| <span class="source-line-no">155</span><span id="line-155"> }</span> |
| <span class="source-line-no">156</span><span id="line-156"> if (dumpStack) {</span> |
| <span class="source-line-no">157</span><span id="line-157"> try {</span> |
| <span class="source-line-no">158</span><span id="line-158"> ByteArrayOutputStream buffer = new ByteArrayOutputStream();</span> |
| <span class="source-line-no">159</span><span id="line-159"> printThreadInfo(new PrintStream(buffer, false, "UTF-8"), title);</span> |
| <span class="source-line-no">160</span><span id="line-160"> log.info(buffer.toString(Charset.defaultCharset().name()));</span> |
| <span class="source-line-no">161</span><span id="line-161"> } catch (UnsupportedEncodingException ignored) {</span> |
| <span class="source-line-no">162</span><span id="line-162"> log.warn(</span> |
| <span class="source-line-no">163</span><span id="line-163"> "Could not write thread info about '" + title + "' due to a string encoding issue.");</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"> }</span> |
| <span class="source-line-no">166</span><span id="line-166"> }</span> |
| <span class="source-line-no">167</span><span id="line-167"> }</span> |
| <span class="source-line-no">168</span><span id="line-168"></span> |
| <span class="source-line-no">169</span><span id="line-169"> /**</span> |
| <span class="source-line-no">170</span><span id="line-170"> * Print all of the thread's information and stack traces.</span> |
| <span class="source-line-no">171</span><span id="line-171"> * @param stream the stream to</span> |
| <span class="source-line-no">172</span><span id="line-172"> * @param title a string title for the stack trace</span> |
| <span class="source-line-no">173</span><span id="line-173"> */</span> |
| <span class="source-line-no">174</span><span id="line-174"> static void printThreadInfo(PrintStream stream, String title) {</span> |
| <span class="source-line-no">175</span><span id="line-175"> final int STACK_DEPTH = 20;</span> |
| <span class="source-line-no">176</span><span id="line-176"> boolean contention = threadBean.isThreadContentionMonitoringEnabled();</span> |
| <span class="source-line-no">177</span><span id="line-177"> long[] threadIds = threadBean.getAllThreadIds();</span> |
| <span class="source-line-no">178</span><span id="line-178"> stream.println("Process Thread Dump: " + title);</span> |
| <span class="source-line-no">179</span><span id="line-179"> stream.println(threadIds.length + " active threads");</span> |
| <span class="source-line-no">180</span><span id="line-180"> for (long tid : threadIds) {</span> |
| <span class="source-line-no">181</span><span id="line-181"> ThreadInfo info = threadBean.getThreadInfo(tid, STACK_DEPTH);</span> |
| <span class="source-line-no">182</span><span id="line-182"> if (info == null) {</span> |
| <span class="source-line-no">183</span><span id="line-183"> stream.println(" Inactive");</span> |
| <span class="source-line-no">184</span><span id="line-184"> continue;</span> |
| <span class="source-line-no">185</span><span id="line-185"> }</span> |
| <span class="source-line-no">186</span><span id="line-186"> stream.println("Thread " + getTaskName(info.getThreadId(), info.getThreadName()) + ":");</span> |
| <span class="source-line-no">187</span><span id="line-187"> Thread.State state = info.getThreadState();</span> |
| <span class="source-line-no">188</span><span id="line-188"> stream.println(" State: " + state);</span> |
| <span class="source-line-no">189</span><span id="line-189"> stream.println(" Blocked count: " + info.getBlockedCount());</span> |
| <span class="source-line-no">190</span><span id="line-190"> stream.println(" Waited count: " + info.getWaitedCount());</span> |
| <span class="source-line-no">191</span><span id="line-191"> if (contention) {</span> |
| <span class="source-line-no">192</span><span id="line-192"> stream.println(" Blocked time: " + info.getBlockedTime());</span> |
| <span class="source-line-no">193</span><span id="line-193"> stream.println(" Waited time: " + info.getWaitedTime());</span> |
| <span class="source-line-no">194</span><span id="line-194"> }</span> |
| <span class="source-line-no">195</span><span id="line-195"> if (state == Thread.State.WAITING) {</span> |
| <span class="source-line-no">196</span><span id="line-196"> stream.println(" Waiting on " + info.getLockName());</span> |
| <span class="source-line-no">197</span><span id="line-197"> } else if (state == Thread.State.BLOCKED) {</span> |
| <span class="source-line-no">198</span><span id="line-198"> stream.println(" Blocked on " + info.getLockName());</span> |
| <span class="source-line-no">199</span><span id="line-199"> stream</span> |
| <span class="source-line-no">200</span><span id="line-200"> .println(" Blocked by " + getTaskName(info.getLockOwnerId(), info.getLockOwnerName()));</span> |
| <span class="source-line-no">201</span><span id="line-201"> }</span> |
| <span class="source-line-no">202</span><span id="line-202"> stream.println(" Stack:");</span> |
| <span class="source-line-no">203</span><span id="line-203"> for (StackTraceElement frame : info.getStackTrace()) {</span> |
| <span class="source-line-no">204</span><span id="line-204"> stream.println(" " + frame.toString());</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"> stream.flush();</span> |
| <span class="source-line-no">208</span><span id="line-208"> }</span> |
| <span class="source-line-no">209</span><span id="line-209"></span> |
| <span class="source-line-no">210</span><span id="line-210"> private static String getTaskName(long id, String name) {</span> |
| <span class="source-line-no">211</span><span id="line-211"> if (name == null) {</span> |
| <span class="source-line-no">212</span><span id="line-212"> return Long.toString(id);</span> |
| <span class="source-line-no">213</span><span id="line-213"> }</span> |
| <span class="source-line-no">214</span><span id="line-214"> return id + " (" + name + ")";</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"> /**</span> |
| <span class="source-line-no">218</span><span id="line-218"> * Creates a Function which can be called to performantly execute a reflected static method. The</span> |
| <span class="source-line-no">219</span><span id="line-219"> * creation of the Function itself may not be fast, but executing that method thereafter should be</span> |
| <span class="source-line-no">220</span><span id="line-220"> * much faster than {@link #invokeMethod(Object, String, Object...)}.</span> |
| <span class="source-line-no">221</span><span id="line-221"> * @param lookupClazz the class to find the static method in</span> |
| <span class="source-line-no">222</span><span id="line-222"> * @param methodName the method name</span> |
| <span class="source-line-no">223</span><span id="line-223"> * @param argumentClazz the type of the argument</span> |
| <span class="source-line-no">224</span><span id="line-224"> * @param returnValueClass the type of the return value</span> |
| <span class="source-line-no">225</span><span id="line-225"> * @return a function which when called executes the requested static method.</span> |
| <span class="source-line-no">226</span><span id="line-226"> * @throws Throwable exception types from the underlying reflection</span> |
| <span class="source-line-no">227</span><span id="line-227"> */</span> |
| <span class="source-line-no">228</span><span id="line-228"> public static <I, R> Function<I, R> getOneArgStaticMethodAsFunction(Class<?> lookupClazz,</span> |
| <span class="source-line-no">229</span><span id="line-229"> String methodName, Class<I> argumentClazz, Class<R> returnValueClass) throws Throwable {</span> |
| <span class="source-line-no">230</span><span id="line-230"> MethodHandles.Lookup lookup = MethodHandles.lookup();</span> |
| <span class="source-line-no">231</span><span id="line-231"> MethodHandle methodHandle = lookup.findStatic(lookupClazz, methodName,</span> |
| <span class="source-line-no">232</span><span id="line-232"> MethodType.methodType(returnValueClass, argumentClazz));</span> |
| <span class="source-line-no">233</span><span id="line-233"> CallSite site =</span> |
| <span class="source-line-no">234</span><span id="line-234"> LambdaMetafactory.metafactory(lookup, "apply", MethodType.methodType(Function.class),</span> |
| <span class="source-line-no">235</span><span id="line-235"> methodHandle.type().generic(), methodHandle, methodHandle.type());</span> |
| <span class="source-line-no">236</span><span id="line-236"></span> |
| <span class="source-line-no">237</span><span id="line-237"> return (Function<I, R>) site.getTarget().invokeExact();</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> |
| <span class="source-line-no">240</span><span id="line-240"></span> |
| <span class="source-line-no">241</span><span id="line-241"> /**</span> |
| <span class="source-line-no">242</span><span id="line-242"> * Get and invoke the target method from the given object with given parameters</span> |
| <span class="source-line-no">243</span><span id="line-243"> * @param obj the object to get and invoke method from</span> |
| <span class="source-line-no">244</span><span id="line-244"> * @param methodName the name of the method to invoke</span> |
| <span class="source-line-no">245</span><span id="line-245"> * @param params the parameters for the method to invoke</span> |
| <span class="source-line-no">246</span><span id="line-246"> * @return the return value of the method invocation</span> |
| <span class="source-line-no">247</span><span id="line-247"> */</span> |
| <span class="source-line-no">248</span><span id="line-248"> @NonNull</span> |
| <span class="source-line-no">249</span><span id="line-249"> public static Object invokeMethod(Object obj, String methodName, Object... params) {</span> |
| <span class="source-line-no">250</span><span id="line-250"> Method m;</span> |
| <span class="source-line-no">251</span><span id="line-251"> try {</span> |
| <span class="source-line-no">252</span><span id="line-252"> m = obj.getClass().getMethod(methodName, getParameterTypes(params));</span> |
| <span class="source-line-no">253</span><span id="line-253"> m.setAccessible(true);</span> |
| <span class="source-line-no">254</span><span id="line-254"> return m.invoke(obj, params);</span> |
| <span class="source-line-no">255</span><span id="line-255"> } catch (NoSuchMethodException e) {</span> |
| <span class="source-line-no">256</span><span id="line-256"> throw new UnsupportedOperationException("Cannot find specified method " + methodName, e);</span> |
| <span class="source-line-no">257</span><span id="line-257"> } catch (IllegalAccessException e) {</span> |
| <span class="source-line-no">258</span><span id="line-258"> throw new UnsupportedOperationException("Unable to access specified method " + methodName, e);</span> |
| <span class="source-line-no">259</span><span id="line-259"> } catch (IllegalArgumentException e) {</span> |
| <span class="source-line-no">260</span><span id="line-260"> throw new UnsupportedOperationException("Illegal arguments supplied for method " + methodName,</span> |
| <span class="source-line-no">261</span><span id="line-261"> e);</span> |
| <span class="source-line-no">262</span><span id="line-262"> } catch (InvocationTargetException e) {</span> |
| <span class="source-line-no">263</span><span id="line-263"> throw new UnsupportedOperationException("Method threw an exception for " + methodName, e);</span> |
| <span class="source-line-no">264</span><span id="line-264"> }</span> |
| <span class="source-line-no">265</span><span id="line-265"> }</span> |
| <span class="source-line-no">266</span><span id="line-266"></span> |
| <span class="source-line-no">267</span><span id="line-267"> private static Class<?>[] getParameterTypes(Object[] params) {</span> |
| <span class="source-line-no">268</span><span id="line-268"> Class<?>[] parameterTypes = new Class<?>[params.length];</span> |
| <span class="source-line-no">269</span><span id="line-269"> for (int i = 0; i < params.length; i++) {</span> |
| <span class="source-line-no">270</span><span id="line-270"> parameterTypes[i] = params[i].getClass();</span> |
| <span class="source-line-no">271</span><span id="line-271"> }</span> |
| <span class="source-line-no">272</span><span id="line-272"> return parameterTypes;</span> |
| <span class="source-line-no">273</span><span id="line-273"> }</span> |
| <span class="source-line-no">274</span><span id="line-274"></span> |
| <span class="source-line-no">275</span><span id="line-275"> public static Field getModifiersField() throws IllegalAccessException, NoSuchFieldException {</span> |
| <span class="source-line-no">276</span><span id="line-276"> // this is copied from https://github.com/powermock/powermock/pull/1010/files to work around</span> |
| <span class="source-line-no">277</span><span id="line-277"> // JDK 12+</span> |
| <span class="source-line-no">278</span><span id="line-278"> Field modifiersField = null;</span> |
| <span class="source-line-no">279</span><span id="line-279"> try {</span> |
| <span class="source-line-no">280</span><span id="line-280"> modifiersField = Field.class.getDeclaredField("modifiers");</span> |
| <span class="source-line-no">281</span><span id="line-281"> } catch (NoSuchFieldException e) {</span> |
| <span class="source-line-no">282</span><span id="line-282"> try {</span> |
| <span class="source-line-no">283</span><span id="line-283"> Method getDeclaredFields0 =</span> |
| <span class="source-line-no">284</span><span id="line-284"> Class.class.getDeclaredMethod("getDeclaredFields0", boolean.class);</span> |
| <span class="source-line-no">285</span><span id="line-285"> boolean accessibleBeforeSet = getDeclaredFields0.isAccessible();</span> |
| <span class="source-line-no">286</span><span id="line-286"> getDeclaredFields0.setAccessible(true);</span> |
| <span class="source-line-no">287</span><span id="line-287"> Field[] fields = (Field[]) getDeclaredFields0.invoke(Field.class, false);</span> |
| <span class="source-line-no">288</span><span id="line-288"> getDeclaredFields0.setAccessible(accessibleBeforeSet);</span> |
| <span class="source-line-no">289</span><span id="line-289"> for (Field field : fields) {</span> |
| <span class="source-line-no">290</span><span id="line-290"> if ("modifiers".equals(field.getName())) {</span> |
| <span class="source-line-no">291</span><span id="line-291"> modifiersField = field;</span> |
| <span class="source-line-no">292</span><span id="line-292"> break;</span> |
| <span class="source-line-no">293</span><span id="line-293"> }</span> |
| <span class="source-line-no">294</span><span id="line-294"> }</span> |
| <span class="source-line-no">295</span><span id="line-295"> if (modifiersField == null) {</span> |
| <span class="source-line-no">296</span><span id="line-296"> throw e;</span> |
| <span class="source-line-no">297</span><span id="line-297"> }</span> |
| <span class="source-line-no">298</span><span id="line-298"> } catch (NoSuchMethodException ex) {</span> |
| <span class="source-line-no">299</span><span id="line-299"> e.addSuppressed(ex);</span> |
| <span class="source-line-no">300</span><span id="line-300"> throw e;</span> |
| <span class="source-line-no">301</span><span id="line-301"> } catch (InvocationTargetException ex) {</span> |
| <span class="source-line-no">302</span><span id="line-302"> e.addSuppressed(ex);</span> |
| <span class="source-line-no">303</span><span id="line-303"> throw e;</span> |
| <span class="source-line-no">304</span><span id="line-304"> }</span> |
| <span class="source-line-no">305</span><span id="line-305"> }</span> |
| <span class="source-line-no">306</span><span id="line-306"> return modifiersField;</span> |
| <span class="source-line-no">307</span><span id="line-307"> }</span> |
| <span class="source-line-no">308</span><span id="line-308"></span> |
| <span class="source-line-no">309</span><span id="line-309">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
