521 lines
20 KiB
Java
521 lines
20 KiB
Java
/*
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* Copyright (c) 2009, 2013, 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.
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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 unit tests for java.lang.invoke.MethodHandle.invoke
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* @compile InvokeGenericTest.java
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* @run testng/othervm test.java.lang.invoke.InvokeGenericTest
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*/
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package test.java.lang.invoke;
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import java.lang.invoke.*;
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import static java.lang.invoke.MethodHandles.*;
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import static java.lang.invoke.MethodType.*;
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import java.lang.reflect.*;
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import java.util.*;
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import org.testng.*;
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import static org.testng.AssertJUnit.*;
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import org.testng.annotations.*;
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/**
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*
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* @author jrose
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*/
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@SuppressWarnings("cast") // various casts help emphasize arguments to invokeExact
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public class InvokeGenericTest {
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// How much output?
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static int verbosity = 0;
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static {
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String vstr = System.getProperty("test.java.lang.invoke.InvokeGenericTest.verbosity");
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if (vstr != null) verbosity = Integer.parseInt(vstr);
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}
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// public static void main(String... av) throws Throwable {
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// new InvokeGenericTest().testFirst();
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// }
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@Test
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public void testFirst() throws Throwable {
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verbosity += 9; try {
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// left blank for debugging
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} finally { printCounts(); verbosity -= 9; }
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}
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public InvokeGenericTest() {
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}
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String testName;
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static int allPosTests, allNegTests;
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int posTests, negTests;
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@AfterMethod
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public void printCounts() {
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if (verbosity >= 2 && (posTests | negTests) != 0) {
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System.out.println();
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if (posTests != 0) System.out.println("=== "+testName+": "+posTests+" positive test cases run");
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if (negTests != 0) System.out.println("=== "+testName+": "+negTests+" negative test cases run");
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allPosTests += posTests;
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allNegTests += negTests;
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posTests = negTests = 0;
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}
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}
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void countTest(boolean positive) {
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if (positive) ++posTests;
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else ++negTests;
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}
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void countTest() { countTest(true); }
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void startTest(String name) {
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if (testName != null) printCounts();
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if (verbosity >= 1)
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System.out.println("["+name+"]");
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posTests = negTests = 0;
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testName = name;
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}
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@BeforeClass
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public static void setUpClass() throws Exception {
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calledLog.clear();
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calledLog.add(null);
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nextArgVal = INITIAL_ARG_VAL;
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}
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@AfterClass
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public static void tearDownClass() throws Exception {
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int posTests = allPosTests, negTests = allNegTests;
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if (verbosity >= 2 && (posTests | negTests) != 0) {
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System.out.println();
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if (posTests != 0) System.out.println("=== "+posTests+" total positive test cases");
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if (negTests != 0) System.out.println("=== "+negTests+" total negative test cases");
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}
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}
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static List<Object> calledLog = new ArrayList<>();
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static Object logEntry(String name, Object... args) {
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return Arrays.asList(name, Arrays.asList(args));
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}
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static Object called(String name, Object... args) {
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Object entry = logEntry(name, args);
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calledLog.add(entry);
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return entry;
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}
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static void assertCalled(String name, Object... args) {
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Object expected = logEntry(name, args);
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Object actual = calledLog.get(calledLog.size() - 1);
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if (expected.equals(actual) && verbosity < 9) return;
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System.out.println("assertCalled "+name+":");
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System.out.println("expected: "+expected);
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System.out.println("actual: "+actual);
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System.out.println("ex. types: "+getClasses(expected));
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System.out.println("act. types: "+getClasses(actual));
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assertEquals("previous method call", expected, actual);
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}
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static void printCalled(MethodHandle target, String name, Object... args) {
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if (verbosity >= 3)
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System.out.println("calling MH="+target+" to "+name+Arrays.toString(args));
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}
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static Object castToWrapper(Object value, Class<?> dst) {
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Object wrap = null;
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if (value instanceof Number)
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wrap = castToWrapperOrNull(((Number)value).longValue(), dst);
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if (value instanceof Character)
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wrap = castToWrapperOrNull((char)(Character)value, dst);
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if (wrap != null) return wrap;
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return dst.cast(value);
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}
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static Object castToWrapperOrNull(long value, Class<?> dst) {
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if (dst == int.class || dst == Integer.class)
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return (int)(value);
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if (dst == long.class || dst == Long.class)
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return (long)(value);
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if (dst == char.class || dst == Character.class)
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return (char)(value);
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if (dst == short.class || dst == Short.class)
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return (short)(value);
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if (dst == float.class || dst == Float.class)
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return (float)(value);
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if (dst == double.class || dst == Double.class)
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return (double)(value);
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if (dst == byte.class || dst == Byte.class)
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return (byte)(value);
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if (dst == boolean.class || dst == boolean.class)
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return ((value % 29) & 1) == 0;
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return null;
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}
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static final int ONE_MILLION = (1000*1000), // first int value
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TEN_BILLION = (10*1000*1000*1000), // scale factor to reach upper 32 bits
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INITIAL_ARG_VAL = ONE_MILLION << 1; // <<1 makes space for sign bit;
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static long nextArgVal;
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static long nextArg(boolean moreBits) {
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long val = nextArgVal++;
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long sign = -(val & 1); // alternate signs
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val >>= 1;
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if (moreBits)
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// Guarantee some bits in the high word.
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// In any case keep the decimal representation simple-looking,
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// with lots of zeroes, so as not to make the printed decimal
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// strings unnecessarily noisy.
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val += (val % ONE_MILLION) * TEN_BILLION;
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return val ^ sign;
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}
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static int nextArg() {
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// Produce a 32-bit result something like ONE_MILLION+(smallint).
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// Example: 1_000_042.
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return (int) nextArg(false);
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}
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static long nextArg(Class<?> kind) {
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if (kind == long.class || kind == Long.class ||
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kind == double.class || kind == Double.class)
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// produce a 64-bit result something like
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// ((TEN_BILLION+1) * (ONE_MILLION+(smallint)))
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// Example: 10_000_420_001_000_042.
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return nextArg(true);
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return (long) nextArg();
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}
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static Object randomArg(Class<?> param) {
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Object wrap = castToWrapperOrNull(nextArg(param), param);
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if (wrap != null) {
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return wrap;
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}
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// import sun.invoke.util.Wrapper;
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// Wrapper wrap = Wrapper.forBasicType(dst);
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// if (wrap == Wrapper.OBJECT && Wrapper.isWrapperType(dst))
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// wrap = Wrapper.forWrapperType(dst);
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// if (wrap != Wrapper.OBJECT)
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// return wrap.wrap(nextArg++);
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if (param.isInterface()) {
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for (Class<?> c : param.getClasses()) {
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if (param.isAssignableFrom(c) && !c.isInterface())
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{ param = c; break; }
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}
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}
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if (param.isInterface() || param.isAssignableFrom(String.class))
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return "#"+nextArg();
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else
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try {
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return param.newInstance();
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} catch (InstantiationException | IllegalAccessException ex) {
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}
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return null; // random class not Object, String, Integer, etc.
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}
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static Object[] randomArgs(Class<?>... params) {
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Object[] args = new Object[params.length];
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for (int i = 0; i < args.length; i++)
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args[i] = randomArg(params[i]);
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return args;
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}
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static Object[] randomArgs(int nargs, Class<?> param) {
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Object[] args = new Object[nargs];
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for (int i = 0; i < args.length; i++)
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args[i] = randomArg(param);
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return args;
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}
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static final Object ANON_OBJ = new Object();
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static Object zeroArg(Class<?> param) {
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Object x = castToWrapperOrNull(0L, param);
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if (x != null) return x;
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if (param.isInterface() || param.isAssignableFrom(String.class)) return "\"\"";
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if (param == Object.class) return ANON_OBJ;
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if (param.getComponentType() != null) return Array.newInstance(param.getComponentType(), 0);
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return null;
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}
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static Object[] zeroArgs(Class<?>... params) {
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Object[] args = new Object[params.length];
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for (int i = 0; i < args.length; i++)
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args[i] = zeroArg(params[i]);
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return args;
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}
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static Object[] zeroArgs(List<Class<?>> params) {
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return zeroArgs(params.toArray(new Class<?>[0]));
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}
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@SafeVarargs @SuppressWarnings("varargs")
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static <T, E extends T> T[] array(Class<T[]> atype, E... a) {
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return Arrays.copyOf(a, a.length, atype);
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}
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@SafeVarargs @SuppressWarnings("varargs")
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static <T> T[] cat(T[] a, T... b) {
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int alen = a.length, blen = b.length;
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if (blen == 0) return a;
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T[] c = Arrays.copyOf(a, alen + blen);
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System.arraycopy(b, 0, c, alen, blen);
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return c;
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}
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static Integer[] boxAll(int... vx) {
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Integer[] res = new Integer[vx.length];
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for (int i = 0; i < res.length; i++) {
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res[i] = vx[i];
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}
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return res;
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}
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static Object getClasses(Object x) {
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if (x == null) return x;
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if (x instanceof String) return x; // keep the name
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if (x instanceof List) {
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// recursively report classes of the list elements
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Object[] xa = ((List)x).toArray();
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for (int i = 0; i < xa.length; i++)
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xa[i] = getClasses(xa[i]);
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return Arrays.asList(xa);
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}
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return x.getClass().getSimpleName();
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}
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static MethodHandle changeArgTypes(MethodHandle target, Class<?> argType) {
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return changeArgTypes(target, 0, 999, argType);
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}
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static MethodHandle changeArgTypes(MethodHandle target,
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int beg, int end, Class<?> argType) {
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MethodType targetType = target.type();
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end = Math.min(end, targetType.parameterCount());
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ArrayList<Class<?>> argTypes = new ArrayList<>(targetType.parameterList());
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Collections.fill(argTypes.subList(beg, end), argType);
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MethodType ttype2 = MethodType.methodType(targetType.returnType(), argTypes);
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return target.asType(ttype2);
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}
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// This lookup is good for all members in and under InvokeGenericTest.
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static final Lookup LOOKUP = MethodHandles.lookup();
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Map<List<Class<?>>, MethodHandle> CALLABLES = new HashMap<>();
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MethodHandle callable(List<Class<?>> params) {
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MethodHandle mh = CALLABLES.get(params);
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if (mh == null) {
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mh = collector_MH.asType(methodType(Object.class, params));
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CALLABLES.put(params, mh);
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}
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return mh;
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}
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MethodHandle callable(Class<?>... params) {
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return callable(Arrays.asList(params));
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}
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private static Object collector(Object... args) {
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return Arrays.asList(args);
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}
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private static final MethodHandle collector_MH;
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static {
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try {
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collector_MH
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= LOOKUP.findStatic(LOOKUP.lookupClass(),
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"collector",
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methodType(Object.class, Object[].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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@Test
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public void testSimple() throws Throwable {
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startTest("testSimple");
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countTest();
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String[] args = { "one", "two" };
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MethodHandle mh = callable(Object.class, String.class);
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Object res; List<?> resl;
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res = resl = (List<?>) mh.invoke((String)args[0], (Object)args[1]);
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//System.out.println(res);
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assertEquals(Arrays.asList(args), res);
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}
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@Test
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public void testSimplePrims() throws Throwable {
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startTest("testSimplePrims");
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countTest();
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int[] args = { 1, 2 };
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MethodHandle mh = callable(Object.class, Object.class);
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Object res; List<?> resl;
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res = resl = (List<?>) mh.invoke(args[0], args[1]);
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//System.out.println(res);
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assertEquals(Arrays.toString(args), res.toString());
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}
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@Test
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public void testAlternateName() throws Throwable {
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startTest("testAlternateName");
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countTest();
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String[] args = { "one", "two" };
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MethodHandle mh = callable(Object.class, String.class);
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Object res; List<?> resl;
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res = resl = (List<?>) mh.invoke((String)args[0], (Object)args[1]);
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//System.out.println(res);
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assertEquals(Arrays.asList(args), res);
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}
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@Test
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public void testWrongArgumentCount() throws Throwable {
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startTest("testWrongArgumentCount");
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for (int i = 0; i <= 10; i++) {
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testWrongArgumentCount(Collections.<Class<?>>nCopies(i, Integer.class));
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if (i <= 4) {
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testWrongArgumentCount(Collections.<Class<?>>nCopies(i, int.class));
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testWrongArgumentCount(Collections.<Class<?>>nCopies(i, long.class));
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}
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}
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}
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public void testWrongArgumentCount(List<Class<?>> params) throws Throwable {
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int max = params.size();
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for (int i = 0; i < max; i++) {
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List<Class<?>> params2 = params.subList(0, i);
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for (int k = 0; k <= 2; k++) {
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if (k == 1) params = methodType(Object.class, params).generic().parameterList();
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if (k == 2) params2 = methodType(Object.class, params2).generic().parameterList();
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testWrongArgumentCount(params, params2);
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testWrongArgumentCount(params2, params);
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}
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}
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}
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public void testWrongArgumentCount(List<Class<?>> expect, List<Class<?>> observe) throws Throwable {
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countTest(false);
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if (expect.equals(observe))
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assert(false);
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MethodHandle target = callable(expect);
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Object[] args = zeroArgs(observe);
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Object junk;
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try {
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switch (args.length) {
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case 0:
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junk = target.invoke(); break;
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case 1:
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junk = target.invoke(args[0]); break;
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case 2:
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junk = target.invoke(args[0], args[1]); break;
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case 3:
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junk = target.invoke(args[0], args[1], args[2]); break;
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case 4:
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junk = target.invoke(args[0], args[1], args[2], args[3]); break;
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default:
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junk = target.invokeWithArguments(args); break;
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}
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} catch (WrongMethodTypeException ex) {
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return;
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} catch (Exception ex) {
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throw new RuntimeException("wrong exception calling "+target+" on "+Arrays.asList(args), ex);
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}
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throw new RuntimeException("bad success calling "+target+" on "+Arrays.asList(args));
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}
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/** Make a list of all combinations of the given types, with the given arities.
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* A void return type is possible iff the first type is void.class.
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*/
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static List<MethodType> allMethodTypes(int minargc, int maxargc, Class<?>... types) {
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ArrayList<MethodType> result = new ArrayList<>();
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if (types.length > 0) {
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ArrayList<MethodType> argcTypes = new ArrayList<>();
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// build arity-zero types first
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for (Class<?> rtype : types) {
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argcTypes.add(MethodType.methodType(rtype));
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}
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if (types[0] == void.class)
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// void is not an argument type
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types = Arrays.copyOfRange(types, 1, types.length);
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for (int argc = 0; argc <= maxargc; argc++) {
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if (argc >= minargc)
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result.addAll(argcTypes);
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if (argc >= maxargc)
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break;
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ArrayList<MethodType> prevTypes = argcTypes;
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argcTypes = new ArrayList<>();
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for (MethodType prevType : prevTypes) {
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for (Class<?> ptype : types) {
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argcTypes.add(prevType.insertParameterTypes(argc, ptype));
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}
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}
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}
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}
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return Collections.unmodifiableList(result);
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}
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static List<MethodType> allMethodTypes(int argc, Class<?>... types) {
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return allMethodTypes(argc, argc, types);
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}
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MethodHandle toString_MH;
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@Test
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public void testReferenceConversions() throws Throwable {
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startTest("testReferenceConversions");
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toString_MH = LOOKUP.
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findVirtual(Object.class, "toString", MethodType.methodType(String.class));
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Object[] args = { "one", "two" };
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for (MethodType type : allMethodTypes(2, Object.class, String.class, CharSequence.class)) {
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testReferenceConversions(type, args);
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}
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}
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public void testReferenceConversions(MethodType type, Object... args) throws Throwable {
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countTest();
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int nargs = args.length;
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List<Object> argList = Arrays.asList(args);
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String expectString = argList.toString();
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if (verbosity > 3) System.out.println("target type: "+type+expectString);
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MethodHandle mh = callable(type.parameterList());
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mh = MethodHandles.filterReturnValue(mh, toString_MH);
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mh = mh.asType(type);
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Object res = null;
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if (nargs == 2) {
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res = mh.invoke((Object)args[0], (Object)args[1]);
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assertEquals(expectString, res);
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res = mh.invoke((String)args[0], (Object)args[1]);
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assertEquals(expectString, res);
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res = mh.invoke((Object)args[0], (String)args[1]);
|
|
assertEquals(expectString, res);
|
|
res = mh.invoke((String)args[0], (String)args[1]);
|
|
assertEquals(expectString, res);
|
|
res = mh.invoke((String)args[0], (CharSequence)args[1]);
|
|
assertEquals(expectString, res);
|
|
res = mh.invoke((CharSequence)args[0], (Object)args[1]);
|
|
assertEquals(expectString, res);
|
|
res = (String) mh.invoke((Object)args[0], (Object)args[1]);
|
|
assertEquals(expectString, res);
|
|
res = (String) mh.invoke((String)args[0], (Object)args[1]);
|
|
assertEquals(expectString, res);
|
|
res = (CharSequence) mh.invoke((String)args[0], (Object)args[1]);
|
|
assertEquals(expectString, res);
|
|
} else {
|
|
assert(false); // write this code
|
|
}
|
|
//System.out.println(res);
|
|
}
|
|
|
|
|
|
@Test
|
|
public void testBoxConversions() throws Throwable {
|
|
startTest("testBoxConversions");
|
|
countTest();
|
|
Object[] args = { 1, 2 };
|
|
MethodHandle mh = callable(Object.class, int.class);
|
|
Object res; List<?> resl; int resi;
|
|
res = resl = (List<?>) mh.invoke((int)args[0], (Object)args[1]);
|
|
//System.out.println(res);
|
|
assertEquals(Arrays.asList(args), res);
|
|
mh = MethodHandles.identity(int.class);
|
|
mh = MethodHandles.dropArguments(mh, 1, int.class);
|
|
res = resi = (int) mh.invoke((Object) args[0], (Object) args[1]);
|
|
assertEquals(args[0], res);
|
|
res = resi = (int) mh.invoke((int) args[0], (Object) args[1]);
|
|
assertEquals(args[0], res);
|
|
}
|
|
|
|
}
|