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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.util;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import edu.umd.cs.findbugs.annotations.NonNull;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.ByteArrayOutputStream;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.PrintStream;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.io.UnsupportedEncodingException;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.lang.invoke.CallSite;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.lang.invoke.LambdaMetafactory;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.lang.invoke.MethodHandle;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.lang.invoke.MethodHandles;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.lang.invoke.MethodType;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.lang.management.ManagementFactory;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import java.lang.management.ThreadInfo;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import java.lang.management.ThreadMXBean;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import java.lang.reflect.Constructor;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import java.lang.reflect.Field;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import java.lang.reflect.InvocationTargetException;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import java.lang.reflect.Method;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import java.nio.charset.Charset;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import java.util.function.Function;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.slf4j.Logger;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span><a name="line.40"></a> |
| <span class="sourceLineNo">041</span>@InterfaceAudience.Private<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>public class ReflectionUtils {<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> @SuppressWarnings({ "unchecked", "TypeParameterUnusedInFormals" })<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> public static <T> T instantiateWithCustomCtor(String className, Class<?>[] ctorArgTypes,<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> Object[] ctorArgs) {<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> try {<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> Class<? extends T> resultType = (Class<? extends T>) Class.forName(className);<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> Constructor<? extends T> ctor = resultType.getDeclaredConstructor(ctorArgTypes);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> return instantiate(className, ctor, ctorArgs);<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> } catch (ClassNotFoundException e) {<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> throw new UnsupportedOperationException("Unable to find " + className, e);<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> } catch (NoSuchMethodException e) {<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> throw new UnsupportedOperationException(<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> "Unable to find suitable constructor for class " + className, e);<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> }<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> }<a name="line.56"></a> |
| <span class="sourceLineNo">057</span><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> public static <T> T instantiate(final String className, Constructor<T> ctor, Object... ctorArgs) {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> try {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> ctor.setAccessible(true);<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> return ctor.newInstance(ctorArgs);<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> } catch (IllegalAccessException e) {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> throw new UnsupportedOperationException("Unable to access specified class " + className, e);<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> } catch (InstantiationException e) {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> throw new UnsupportedOperationException("Unable to instantiate specified class " + className,<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> e);<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> } catch (InvocationTargetException e) {<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> throw new UnsupportedOperationException("Constructor threw an exception for " + className, e);<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> }<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> }<a name="line.70"></a> |
| <span class="sourceLineNo">071</span><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> @SuppressWarnings({ "unchecked", "TypeParameterUnusedInFormals" })<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> public static <T> T newInstance(String className, Object... params) {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> Class<T> type;<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> try {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> type = (Class<T>) getClassLoader().loadClass(className);<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> } catch (ClassNotFoundException | ClassCastException e) {<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> throw new UnsupportedOperationException("Unable to load specified class " + className, e);<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> }<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> return instantiate(type.getName(), findConstructor(type, params), params);<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> }<a name="line.81"></a> |
| <span class="sourceLineNo">082</span><a name="line.82"></a> |
| <span class="sourceLineNo">083</span> public static ClassLoader getClassLoader() {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> ClassLoader cl = Thread.currentThread().getContextClassLoader();<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> if (cl == null) {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> cl = ReflectionUtils.class.getClassLoader();<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> }<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> if (cl == null) {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> cl = ClassLoader.getSystemClassLoader();<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> }<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> if (cl == null) {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> throw new RuntimeException("A ClassLoader could not be found");<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> }<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> return cl;<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> }<a name="line.95"></a> |
| <span class="sourceLineNo">096</span><a name="line.96"></a> |
| <span class="sourceLineNo">097</span> public static <T> T newInstance(Class<T> type, Object... params) {<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> return instantiate(type.getName(), findConstructor(type, params), params);<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> }<a name="line.99"></a> |
| <span class="sourceLineNo">100</span><a name="line.100"></a> |
| <span class="sourceLineNo">101</span> @SuppressWarnings("unchecked")<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> public static <T> Constructor<T> findConstructor(Class<T> type, Object... paramTypes) {<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> Constructor<T>[] constructors = (Constructor<T>[]) type.getDeclaredConstructors();<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> for (Constructor<T> ctor : constructors) {<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> Class<?>[] ctorParamTypes = ctor.getParameterTypes();<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> if (ctorParamTypes.length != paramTypes.length) {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> continue;<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> }<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> boolean match = true;<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> for (int i = 0; i < ctorParamTypes.length && match; ++i) {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> if (paramTypes[i] == null) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> match = !ctorParamTypes[i].isPrimitive();<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> } else {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> Class<?> paramType = paramTypes[i].getClass();<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> match = !ctorParamTypes[i].isPrimitive()<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> ? ctorParamTypes[i].isAssignableFrom(paramType)<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> : ((int.class.equals(ctorParamTypes[i]) && Integer.class.equals(paramType))<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> || (long.class.equals(ctorParamTypes[i]) && Long.class.equals(paramType))<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> || (double.class.equals(ctorParamTypes[i]) && Double.class.equals(paramType))<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> || (char.class.equals(ctorParamTypes[i]) && Character.class.equals(paramType))<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> || (short.class.equals(ctorParamTypes[i]) && Short.class.equals(paramType))<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> || (boolean.class.equals(ctorParamTypes[i]) && Boolean.class.equals(paramType))<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> || (byte.class.equals(ctorParamTypes[i]) && Byte.class.equals(paramType)));<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> }<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> }<a name="line.126"></a> |
| <span class="sourceLineNo">127</span><a name="line.127"></a> |
| <span class="sourceLineNo">128</span> if (match) {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> return ctor;<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> }<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> }<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> throw new UnsupportedOperationException(<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> "Unable to find suitable constructor for class " + type.getName());<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> }<a name="line.134"></a> |
| <span class="sourceLineNo">135</span><a name="line.135"></a> |
| <span class="sourceLineNo">136</span> /* synchronized on ReflectionUtils.class */<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> private static long previousLogTime = 0;<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> private static final ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> /**<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> * Log the current thread stacks at INFO level.<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> * @param log the logger that logs the stack trace<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> * @param title a descriptive title for the call stacks<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> * @param minInterval the minimum time from the last<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> */<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> public static void logThreadInfo(Logger log, String title, long minInterval) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> boolean dumpStack = false;<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> if (log.isInfoEnabled()) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> synchronized (ReflectionUtils.class) {<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> long now = EnvironmentEdgeManager.currentTime();<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> if (now - previousLogTime >= minInterval * 1000) {<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> previousLogTime = now;<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> dumpStack = true;<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> }<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> }<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> if (dumpStack) {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> try {<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> ByteArrayOutputStream buffer = new ByteArrayOutputStream();<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> printThreadInfo(new PrintStream(buffer, false, "UTF-8"), title);<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> log.info(buffer.toString(Charset.defaultCharset().name()));<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> } catch (UnsupportedEncodingException ignored) {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> log.warn(<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> "Could not write thread info about '" + title + "' due to a string encoding issue.");<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> }<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> }<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> }<a name="line.167"></a> |
| <span class="sourceLineNo">168</span><a name="line.168"></a> |
| <span class="sourceLineNo">169</span> /**<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> * Print all of the thread's information and stack traces.<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> * @param stream the stream to<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> * @param title a string title for the stack trace<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> */<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> static void printThreadInfo(PrintStream stream, String title) {<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> final int STACK_DEPTH = 20;<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> boolean contention = threadBean.isThreadContentionMonitoringEnabled();<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> long[] threadIds = threadBean.getAllThreadIds();<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> stream.println("Process Thread Dump: " + title);<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> stream.println(threadIds.length + " active threads");<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> for (long tid : threadIds) {<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> ThreadInfo info = threadBean.getThreadInfo(tid, STACK_DEPTH);<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> if (info == null) {<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> stream.println(" Inactive");<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> continue;<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> }<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> stream.println("Thread " + getTaskName(info.getThreadId(), info.getThreadName()) + ":");<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> Thread.State state = info.getThreadState();<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> stream.println(" State: " + state);<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> stream.println(" Blocked count: " + info.getBlockedCount());<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> stream.println(" Waited count: " + info.getWaitedCount());<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> if (contention) {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> stream.println(" Blocked time: " + info.getBlockedTime());<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> stream.println(" Waited time: " + info.getWaitedTime());<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> }<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> if (state == Thread.State.WAITING) {<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> stream.println(" Waiting on " + info.getLockName());<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> } else if (state == Thread.State.BLOCKED) {<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> stream.println(" Blocked on " + info.getLockName());<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> stream<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> .println(" Blocked by " + getTaskName(info.getLockOwnerId(), info.getLockOwnerName()));<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> }<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> stream.println(" Stack:");<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> for (StackTraceElement frame : info.getStackTrace()) {<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> stream.println(" " + frame.toString());<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> }<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> }<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> stream.flush();<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> }<a name="line.208"></a> |
| <span class="sourceLineNo">209</span><a name="line.209"></a> |
| <span class="sourceLineNo">210</span> private static String getTaskName(long id, String name) {<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> if (name == null) {<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> return Long.toString(id);<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> }<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> return id + " (" + name + ")";<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> }<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> /**<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> * Creates a Function which can be called to performantly execute a reflected static method. The<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> * creation of the Function itself may not be fast, but executing that method thereafter should be<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> * much faster than {@link #invokeMethod(Object, String, Object...)}.<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> * @param lookupClazz the class to find the static method in<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> * @param methodName the method name<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> * @param argumentClazz the type of the argument<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> * @param returnValueClass the type of the return value<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> * @return a function which when called executes the requested static method.<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> * @throws Throwable exception types from the underlying reflection<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> */<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> public static <I, R> Function<I, R> getOneArgStaticMethodAsFunction(Class<?> lookupClazz,<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> String methodName, Class<I> argumentClazz, Class<R> returnValueClass) throws Throwable {<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> MethodHandles.Lookup lookup = MethodHandles.lookup();<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> MethodHandle methodHandle = lookup.findStatic(lookupClazz, methodName,<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> MethodType.methodType(returnValueClass, argumentClazz));<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> CallSite site =<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> LambdaMetafactory.metafactory(lookup, "apply", MethodType.methodType(Function.class),<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> methodHandle.type().generic(), methodHandle, methodHandle.type());<a name="line.235"></a> |
| <span class="sourceLineNo">236</span><a name="line.236"></a> |
| <span class="sourceLineNo">237</span> return (Function<I, R>) site.getTarget().invokeExact();<a name="line.237"></a> |
| <span class="sourceLineNo">238</span><a name="line.238"></a> |
| <span class="sourceLineNo">239</span> }<a name="line.239"></a> |
| <span class="sourceLineNo">240</span><a name="line.240"></a> |
| <span class="sourceLineNo">241</span> /**<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> * Get and invoke the target method from the given object with given parameters<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> * @param obj the object to get and invoke method from<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> * @param methodName the name of the method to invoke<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> * @param params the parameters for the method to invoke<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> * @return the return value of the method invocation<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> */<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> @NonNull<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> public static Object invokeMethod(Object obj, String methodName, Object... params) {<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> Method m;<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> try {<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> m = obj.getClass().getMethod(methodName, getParameterTypes(params));<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> m.setAccessible(true);<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> return m.invoke(obj, params);<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> } catch (NoSuchMethodException e) {<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> throw new UnsupportedOperationException("Cannot find specified method " + methodName, e);<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> } catch (IllegalAccessException e) {<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> throw new UnsupportedOperationException("Unable to access specified method " + methodName, e);<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> } catch (IllegalArgumentException e) {<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> throw new UnsupportedOperationException("Illegal arguments supplied for method " + methodName,<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> e);<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> } catch (InvocationTargetException e) {<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> throw new UnsupportedOperationException("Method threw an exception for " + methodName, e);<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> }<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> }<a name="line.265"></a> |
| <span class="sourceLineNo">266</span><a name="line.266"></a> |
| <span class="sourceLineNo">267</span> private static Class<?>[] getParameterTypes(Object[] params) {<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> Class<?>[] parameterTypes = new Class<?>[params.length];<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> for (int i = 0; i < params.length; i++) {<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> parameterTypes[i] = params[i].getClass();<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> }<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> return parameterTypes;<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> }<a name="line.273"></a> |
| <span class="sourceLineNo">274</span><a name="line.274"></a> |
| <span class="sourceLineNo">275</span> public static Field getModifiersField() throws IllegalAccessException, NoSuchFieldException {<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> // this is copied from https://github.com/powermock/powermock/pull/1010/files to work around<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> // JDK 12+<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> Field modifiersField = null;<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> try {<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> modifiersField = Field.class.getDeclaredField("modifiers");<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> } catch (NoSuchFieldException e) {<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> try {<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> Method getDeclaredFields0 =<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> Class.class.getDeclaredMethod("getDeclaredFields0", boolean.class);<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> boolean accessibleBeforeSet = getDeclaredFields0.isAccessible();<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> getDeclaredFields0.setAccessible(true);<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> Field[] fields = (Field[]) getDeclaredFields0.invoke(Field.class, false);<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> getDeclaredFields0.setAccessible(accessibleBeforeSet);<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> for (Field field : fields) {<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> if ("modifiers".equals(field.getName())) {<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> modifiersField = field;<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> break;<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> }<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> }<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> if (modifiersField == null) {<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> throw e;<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> }<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> } catch (NoSuchMethodException ex) {<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> e.addSuppressed(ex);<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> throw e;<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> } catch (InvocationTargetException ex) {<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> e.addSuppressed(ex);<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> throw e;<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> }<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> }<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> return modifiersField;<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> }<a name="line.307"></a> |
| <span class="sourceLineNo">308</span><a name="line.308"></a> |
| <span class="sourceLineNo">309</span>}<a name="line.309"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
