1 /*
   2  * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.openjdk.bench.java.lang.reflect;
  24 
  25 import java.lang.reflect.Constructor;
  26 import java.lang.reflect.Method;
  27 import java.util.concurrent.TimeUnit;
  28 
  29 import org.openjdk.jmh.annotations.Benchmark;
  30 import org.openjdk.jmh.annotations.BenchmarkMode;
  31 import org.openjdk.jmh.annotations.Mode;
  32 import org.openjdk.jmh.annotations.OutputTimeUnit;
  33 
  34 @BenchmarkMode(Mode.AverageTime)
  35 @OutputTimeUnit(TimeUnit.NANOSECONDS)
  36 public class Clazz {
  37 
  38     /**
  39      * Get constructor for this class through reflection
  40      *
  41      * @return
  42      * @throws NoSuchMethodException
  43      */
  44     @Benchmark
  45     public Constructor getConstructor() throws NoSuchMethodException {
  46         return Clazz.class.getConstructor();
  47     }
  48 
  49     /**
  50      * Get constructor for the String class through reflection, forcing full
  51      * security check
  52      *
  53      * @return
  54      * @throws NoSuchMethodException
  55      */
  56     @Benchmark
  57     public Constructor getConstructorDifferentClassLoader() throws NoSuchMethodException {
  58         return String.class.getConstructor();
  59     }
  60 
  61     /**
  62      * Get the toString method through reflection on Clazz
  63      *
  64      * @return
  65      */
  66     @Benchmark
  67     public Method getMethod() throws NoSuchMethodException {
  68         return Clazz.class.getMethod("toString");
  69     }
  70 
  71     /**
  72      * Get the toString method through reflection on String, forcing full
  73      * security check
  74      *
  75      * @return
  76      * @throws NoSuchMethodException
  77      */
  78     @Benchmark
  79     public Method getMethodDifferentClassLoader() throws NoSuchMethodException {
  80         return String.class.getMethod("toString");
  81     }
  82 }