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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 package org.openjdk.bench.java.lang.reflect;

    26 

    27 import java.lang.reflect.Constructor;

    28 import java.lang.reflect.Method;

    29 import java.util.concurrent.TimeUnit;

    30 

    31 import org.openjdk.jmh.annotations.Benchmark;

    32 import org.openjdk.jmh.annotations.BenchmarkMode;

    33 import org.openjdk.jmh.annotations.Mode;

    34 import org.openjdk.jmh.annotations.OutputTimeUnit;

    35 

    36 @BenchmarkMode(Mode.AverageTime)

    37 @OutputTimeUnit(TimeUnit.NANOSECONDS)

    38 public class Clazz {

    39 

    40     /**

    41      * Get constructor for this class through reflection

    42      *

    43      * @return

    44      * @throws NoSuchMethodException

    45      */

    46     @Benchmark

    47     public Constructor getConstructor() throws NoSuchMethodException {

    48         return Clazz.class.getConstructor();

    49     }

    50 

    51     /**

    52      * Get constructor for the String class through reflection, forcing full

    53      * security check

    54      *

    55      * @return

    56      * @throws NoSuchMethodException

    57      */

    58     @Benchmark

    59     public Constructor getConstructorDifferentClassLoader() throws NoSuchMethodException {

    60         return String.class.getConstructor();

    61     }

    62 

    63     /**

    64      * Get the toString method through reflection on Clazz

    65      *

    66      * @return

    67      */

    68     @Benchmark

    69     public Method getMethod() throws NoSuchMethodException {

    70         return Clazz.class.getMethod("toString");

    71     }

    72 

    73     /**

    74      * Get the toString method through reflection on String, forcing full

    75      * security check

    76      *

    77      * @return

    78      * @throws NoSuchMethodException

    79      */

    80     @Benchmark

    81     public Method getMethodDifferentClassLoader() throws NoSuchMethodException {

    82         return String.class.getMethod("toString");

    83     }

    84 }