/*

 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.

 * 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

 * published by the Free Software Foundation.  Oracle designates this

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

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

 *

 * 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).

 *

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

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

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

 *

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

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

 * questions.

 */

/* @test

 * @summary example code used in javadoc for java.dyn API

 * @compile -XDallowTransitionalJSR292=no JavaDocExamples.java

 * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles test.java.dyn.JavaDocExamples

 */

/*

---- To run outside jtreg:

$ $JAVA7X_HOME/bin/javac -cp $JUNIT4_JAR -d /tmp/Classes \

   $DAVINCI/sources/jdk/test/java/dyn/JavaDocExamples.java

$ $JAVA7X_HOME/bin/java   -cp $JUNIT4_JAR:/tmp/Classes \

   -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles \

   -Dtest.java.dyn.JavaDocExamples.verbosity=1 \

     test.java.dyn.JavaDocExamples

----

*/

package test.java.dyn;

import java.dyn.*;

import static java.dyn.MethodHandles.*;

import static java.dyn.MethodType.*;

import java.lang.reflect.*;

import java.util.*;

import org.junit.*;

import static org.junit.Assert.*;

import static org.junit.Assume.*;

/**

 * @author jrose

 */

public class JavaDocExamples {

    /** Wrapper for running the JUnit tests in this module.

     *  Put JUnit on the classpath!

     */

    public static void main(String... ignore) {

        org.junit.runner.JUnitCore.runClasses(JavaDocExamples.class);

    }

    // How much output?

    static int verbosity = Integer.getInteger("test.java.dyn.JavaDocExamples.verbosity", 0);

{}

static final private Lookup LOOKUP = lookup();

// static final private MethodHandle CONCAT_1 = LOOKUP.findVirtual(String.class,

//     "concat", methodType(String.class, String.class));

// static final private MethodHandle HASHCODE_1 = LOOKUP.findVirtual(Object.class,

//     "hashCode", methodType(int.class));

// form required if NoAccessException is intercepted:

static final private MethodHandle CONCAT_2, HASHCODE_2;

static {

  try {

    CONCAT_2 = LOOKUP.findVirtual(String.class,

      "concat", methodType(String.class, String.class));

    HASHCODE_2 = LOOKUP.findVirtual(Object.class,

      "hashCode", methodType(int.class));

   } catch (NoAccessException ex) {

     throw new RuntimeException(ex);

   }

}

{}

    @Test public void testFindVirtual() throws Throwable {

{}

MethodHandle CONCAT_3 = LOOKUP.findVirtual(String.class,

  "concat", methodType(String.class, String.class));

MethodHandle HASHCODE_3 = LOOKUP.findVirtual(Object.class,

  "hashCode", methodType(int.class));

//assertEquals("xy", (String) CONCAT_1.invokeExact("x", "y"));

assertEquals("xy", (String) CONCAT_2.<String>invokeExact("x", "y"));

assertEquals("xy", (String) CONCAT_3.<String>invokeExact("x", "y"));

//assertEquals("xy".hashCode(), (int) HASHCODE_1.<int>invokeExact((Object)"xy"));

assertEquals("xy".hashCode(), (int) HASHCODE_2.<int>invokeExact((Object)"xy"));

assertEquals("xy".hashCode(), (int) HASHCODE_3.<int>invokeExact((Object)"xy"));

{}

    }

    @Test public void testDropArguments() throws Throwable {

        {{

{} /// JAVADOC

MethodHandle cat = lookup().findVirtual(String.class,

  "concat", methodType(String.class, String.class));

cat = cat.asType(methodType(Object.class, String.class, String.class)); /*(String)*/

assertEquals("xy", /*(String)*/ cat.invokeExact("x", "y"));

MethodHandle d0 = dropArguments(cat, 0, String.class);

assertEquals("yz", /*(String)*/ d0.invokeExact("x", "y", "z"));

MethodHandle d1 = dropArguments(cat, 1, String.class);

assertEquals("xz", /*(String)*/ d1.invokeExact("x", "y", "z"));

MethodHandle d2 = dropArguments(cat, 2, String.class);

assertEquals("xy", /*(String)*/ d2.invokeExact("x", "y", "z"));

MethodHandle d12 = dropArguments(cat, 1, int.class, boolean.class);

assertEquals("xz", /*(String)*/ d12.invokeExact("x", 12, true, "z"));

            }}

    }

    static void assertEquals(Object exp, Object act) {

        if (verbosity > 0)

            System.out.println("result: "+act);

        Assert.assertEquals(exp, act);

    }

}