f485ab561e
Remove NoAccessException, replace it by ReflectiveOperationException subtypes; adjust javadoc of exceptions Reviewed-by: twisti
221 lines
8.4 KiB
Java
221 lines
8.4 KiB
Java
/*
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* Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @summary example code used in javadoc for java.dyn API
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* @compile -XDallowTransitionalJSR292=no JavaDocExamplesTest.java
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* @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles test.java.dyn.JavaDocExamplesTest
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*/
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/*
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---- To run outside jtreg:
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$ $JAVA7X_HOME/bin/javac -cp $JUNIT4_JAR -d /tmp/Classes \
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$DAVINCI/sources/jdk/test/java/dyn/JavaDocExamplesTest.java
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$ $JAVA7X_HOME/bin/java -cp $JUNIT4_JAR:/tmp/Classes \
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-XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles \
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-Dtest.java.dyn.JavaDocExamplesTest.verbosity=1 \
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test.java.dyn.JavaDocExamplesTest
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----
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*/
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package test.java.dyn;
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import java.dyn.*;
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import static java.dyn.MethodHandles.*;
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import static java.dyn.MethodType.*;
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import java.lang.reflect.*;
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import java.util.*;
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import org.junit.*;
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import static org.junit.Assert.*;
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import static org.junit.Assume.*;
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/**
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* @author jrose
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*/
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public class JavaDocExamplesTest {
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/** Wrapper for running the JUnit tests in this module.
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* Put JUnit on the classpath!
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*/
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public static void main(String... ignore) {
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org.junit.runner.JUnitCore.runClasses(JavaDocExamplesTest.class);
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}
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// How much output?
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static int verbosity = Integer.getInteger("test.java.dyn.JavaDocExamplesTest.verbosity", 0);
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{}
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static final private Lookup LOOKUP = lookup();
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// static final private MethodHandle CONCAT_1 = LOOKUP.findVirtual(String.class,
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// "concat", methodType(String.class, String.class));
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// static final private MethodHandle HASHCODE_1 = LOOKUP.findVirtual(Object.class,
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// "hashCode", methodType(int.class));
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// form required if ReflectiveOperationException is intercepted:
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static final private MethodHandle CONCAT_2, HASHCODE_2;
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static {
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try {
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CONCAT_2 = LOOKUP.findVirtual(String.class,
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"concat", methodType(String.class, String.class));
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HASHCODE_2 = LOOKUP.findVirtual(Object.class,
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"hashCode", methodType(int.class));
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} catch (ReflectiveOperationException ex) {
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throw new RuntimeException(ex);
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}
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}
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{}
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@Test public void testFindVirtual() throws Throwable {
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{}
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MethodHandle CONCAT_3 = LOOKUP.findVirtual(String.class,
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"concat", methodType(String.class, String.class));
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MethodHandle HASHCODE_3 = LOOKUP.findVirtual(Object.class,
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"hashCode", methodType(int.class));
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//assertEquals("xy", (String) CONCAT_1.invokeExact("x", "y"));
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assertEquals("xy", (String) CONCAT_2.invokeExact("x", "y"));
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assertEquals("xy", (String) CONCAT_3.invokeExact("x", "y"));
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//assertEquals("xy".hashCode(), (int) HASHCODE_1.invokeExact((Object)"xy"));
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assertEquals("xy".hashCode(), (int) HASHCODE_2.invokeExact((Object)"xy"));
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assertEquals("xy".hashCode(), (int) HASHCODE_3.invokeExact((Object)"xy"));
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{}
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}
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@Test public void testDropArguments() throws Throwable {
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{{
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{} /// JAVADOC
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MethodHandle cat = lookup().findVirtual(String.class,
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"concat", methodType(String.class, String.class));
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assertEquals("xy", (String) cat.invokeExact("x", "y"));
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MethodHandle d0 = dropArguments(cat, 0, String.class);
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assertEquals("yz", (String) d0.invokeExact("x", "y", "z"));
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MethodHandle d1 = dropArguments(cat, 1, String.class);
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assertEquals("xz", (String) d1.invokeExact("x", "y", "z"));
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MethodHandle d2 = dropArguments(cat, 2, String.class);
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assertEquals("xy", (String) d2.invokeExact("x", "y", "z"));
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MethodHandle d12 = dropArguments(cat, 1, int.class, boolean.class);
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assertEquals("xz", (String) d12.invokeExact("x", 12, true, "z"));
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}}
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}
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@Test public void testFilterArguments() throws Throwable {
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{{
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{} /// JAVADOC
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MethodHandle cat = lookup().findVirtual(String.class,
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"concat", methodType(String.class, String.class));
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MethodHandle upcase = lookup().findVirtual(String.class,
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"toUpperCase", methodType(String.class));
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assertEquals("xy", (String) cat.invokeExact("x", "y"));
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MethodHandle f0 = filterArguments(cat, 0, upcase);
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assertEquals("Xy", (String) f0.invokeExact("x", "y")); // Xy
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MethodHandle f1 = filterArguments(cat, 1, upcase);
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assertEquals("xY", (String) f1.invokeExact("x", "y")); // xY
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MethodHandle f2 = filterArguments(cat, 0, upcase, upcase);
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assertEquals("XY", (String) f2.invokeExact("x", "y")); // XY
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}}
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}
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static void assertEquals(Object exp, Object act) {
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if (verbosity > 0)
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System.out.println("result: "+act);
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Assert.assertEquals(exp, act);
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}
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@Test public void testMethodHandlesSummary() throws Throwable {
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{{
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{} /// JAVADOC
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Object x, y; String s; int i;
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MethodType mt; MethodHandle mh;
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MethodHandles.Lookup lookup = MethodHandles.lookup();
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// mt is (char,char)String
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mt = MethodType.methodType(String.class, char.class, char.class);
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mh = lookup.findVirtual(String.class, "replace", mt);
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s = (String) mh.invokeExact("daddy",'d','n');
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// invokeExact(Ljava/lang/String;CC)Ljava/lang/String;
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assert(s.equals("nanny"));
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// weakly typed invocation (using MHs.invoke)
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s = (String) mh.invokeWithArguments("sappy", 'p', 'v');
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assert(s.equals("savvy"));
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// mt is (Object[])List
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mt = MethodType.methodType(java.util.List.class, Object[].class);
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mh = lookup.findStatic(java.util.Arrays.class, "asList", mt);
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assert(mh.isVarargsCollector());
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x = mh.invokeGeneric("one", "two");
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// invokeGeneric(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object;
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assert(x.equals(java.util.Arrays.asList("one","two")));
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// mt is (Object,Object,Object)Object
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mt = MethodType.genericMethodType(3);
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mh = mh.asType(mt);
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x = mh.invokeExact((Object)1, (Object)2, (Object)3);
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// invokeExact(Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
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assert(x.equals(java.util.Arrays.asList(1,2,3)));
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// mt is { => int}
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mt = MethodType.methodType(int.class);
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mh = lookup.findVirtual(java.util.List.class, "size", mt);
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i = (int) mh.invokeExact(java.util.Arrays.asList(1,2,3));
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// invokeExact(Ljava/util/List;)I
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assert(i == 3);
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mt = MethodType.methodType(void.class, String.class);
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mh = lookup.findVirtual(java.io.PrintStream.class, "println", mt);
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mh.invokeExact(System.out, "Hello, world.");
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// invokeExact(Ljava/io/PrintStream;Ljava/lang/String;)V
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{}
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}}
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}
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@Test public void testAsVarargsCollector() throws Throwable {
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{{
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{} /// JAVADOC
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MethodHandle asList = publicLookup()
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.findStatic(Arrays.class, "asList", methodType(List.class, Object[].class))
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.asVarargsCollector(Object[].class);
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assertEquals("[]", asList.invokeGeneric().toString());
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assertEquals("[1]", asList.invokeGeneric(1).toString());
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assertEquals("[two, too]", asList.invokeGeneric("two", "too").toString());
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Object[] argv = { "three", "thee", "tee" };
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assertEquals("[three, thee, tee]", asList.invokeGeneric(argv).toString());
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List ls = (List) asList.invokeGeneric((Object)argv);
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assertEquals(1, ls.size());
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assertEquals("[three, thee, tee]", Arrays.toString((Object[])ls.get(0)));
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}}
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}
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@Test public void testVarargsCollectorSuppression() throws Throwable {
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{{
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{} /// JAVADOC
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MethodHandle vamh = publicLookup()
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.findStatic(Arrays.class, "asList", methodType(List.class, Object[].class))
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.asVarargsCollector(Object[].class);
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MethodHandle mh = MethodHandles.exactInvoker(vamh.type()).bindTo(vamh);
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assert(vamh.type().equals(mh.type()));
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assertEquals("[1, 2, 3]", vamh.invokeGeneric(1,2,3).toString());
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boolean failed = false;
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try { mh.invokeGeneric(1,2,3); }
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catch (WrongMethodTypeException ex) { failed = true; }
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assert(failed);
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{}
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}}
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}
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}
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