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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package org.openjdk.bench.java.lang.reflect;


import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.SingleShotTime)
@Fork(1)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 10, time = 2)
@State(Scope.Benchmark)
public class ProxyGenBench {

    static final Class<?>[] INTF = new Class<?>[]{Interfaze.class};
    static final IHandler HANDLER = new IHandler();

    @Benchmark
    public void generate100Proxies() {
        for (int i = 0; i < 100; i++) {
            Proxy.newProxyInstance(new ClsLoader(), INTF, HANDLER);
        }
    }

    public interface Interfaze {
        default int sum(int a, int b, int c) {
            return a + b + c;
        }
    }

    static class IHandler implements InvocationHandler {
        @Override
        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
            throw new UnsupportedOperationException();
        }
    }

    static class ClsLoader extends ClassLoader {

        public ClsLoader() {
            super(Interfaze.class.getClassLoader());
        }
    }

    public static void main(String[] args) {
        new ProxyGenBench().generate100Proxies();
    }
}