/*
* Copyright (c) 2009, 2011, 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.
*
* 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.
*
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*/
package test.sun.invoke.util;
import sun.invoke.util.ValueConversions;
import sun.invoke.util.Wrapper;
import java.lang.invoke.MethodType;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Collections;
import org.junit.Ignore;
import org.junit.Test;
import static org.junit.Assert.*;
/* @test
* @summary unit tests for value-type conversion utilities
* @ignore This test requires a special compilation environment to access sun.inovke.util. Run by hand.
* @run junit/othervm test.sun.invoke.util.ValueConversionsTest
* @run junit/othervm
* -DValueConversionsTest.MAX_ARITY=255 -DValueConversionsTest.START_ARITY=250
* test.sun.invoke.util.ValueConversionsTest
*/
// This might take a while and burn lots of metadata:
// @run junit/othervm -DValueConversionsTest.MAX_ARITY=255 -DValueConversionsTest.EXHAUSTIVE=true test.sun.invoke.util.ValueConversionsTest
/**
*
* @author jrose
*/
public class ValueConversionsTest {
private static final Class CLASS = ValueConversionsTest.class;
private static final int MAX_ARITY = Integer.getInteger(CLASS.getSimpleName()+".MAX_ARITY", 40);
private static final int START_ARITY = Integer.getInteger(CLASS.getSimpleName()+".START_ARITY", 0);
private static final boolean EXHAUSTIVE = Boolean.getBoolean(CLASS.getSimpleName()+".EXHAUSTIVE");
@Test
public void testUnbox() throws Throwable {
testUnbox(false);
}
@Test
public void testUnboxCast() throws Throwable {
testUnbox(true);
}
private void testUnbox(boolean doCast) throws Throwable {
//System.out.println("unbox");
for (Wrapper dst : Wrapper.values()) {
//System.out.println(dst);
for (Wrapper src : Wrapper.values()) {
testUnbox(doCast, dst, src);
}
}
}
private void testUnbox(boolean doCast, Wrapper dst, Wrapper src) throws Throwable {
boolean expectThrow = !doCast && !dst.isConvertibleFrom(src);
if (dst == Wrapper.OBJECT || src == Wrapper.OBJECT) return; // must have prims
if (dst == Wrapper.OBJECT)
expectThrow = false; // everything (even VOID==null here) converts to OBJECT
try {
for (int n = -5; n < 10; n++) {
Object box = src.wrap(n);
switch (src) {
case VOID: assertEquals(box, null); break;
case OBJECT: box = box.toString(); break;
case SHORT: assertEquals(box.getClass(), Short.class); break;
default: assertEquals(box.getClass(), src.wrapperType()); break;
}
MethodHandle unboxer;
if (doCast)
unboxer = ValueConversions.unboxCast(dst.primitiveType());
else
unboxer = ValueConversions.unbox(dst.primitiveType());
Object expResult = (box == null) ? dst.zero() : dst.wrap(box);
Object result = null;
switch (dst) {
case INT: result = (int) unboxer.invokeExact(box); break;
case LONG: result = (long) unboxer.invokeExact(box); break;
case FLOAT: result = (float) unboxer.invokeExact(box); break;
case DOUBLE: result = (double) unboxer.invokeExact(box); break;
case CHAR: result = (char) unboxer.invokeExact(box); break;
case BYTE: result = (byte) unboxer.invokeExact(box); break;
case SHORT: result = (short) unboxer.invokeExact(box); break;
case OBJECT: result = (Object) unboxer.invokeExact(box); break;
case BOOLEAN: result = (boolean) unboxer.invokeExact(box); break;
case VOID: result = null; unboxer.invokeExact(box); break;
}
if (expectThrow) {
expResult = "(need an exception)";
}
assertEquals("(doCast,expectThrow,dst,src,n,box)="+Arrays.asList(doCast,expectThrow,dst,src,n,box),
expResult, result);
}
} catch (RuntimeException ex) {
if (expectThrow) return;
System.out.println("Unexpected throw for (doCast,expectThrow,dst,src)="+Arrays.asList(doCast,expectThrow,dst,src));
throw ex;
}
}
@Test
public void testUnboxRaw() throws Throwable {
//System.out.println("unboxRaw");
for (Wrapper w : Wrapper.values()) {
if (w == Wrapper.OBJECT) continue; // skip this; no raw form
//System.out.println(w);
for (int n = -5; n < 10; n++) {
Object box = w.wrap(n);
long expResult = w.unwrapRaw(box);
Object box2 = w.wrapRaw(expResult);
assertEquals(box, box2);
MethodHandle unboxer = ValueConversions.unboxRaw(w.primitiveType());
long result = -1;
switch (w) {
case INT: result = (int) unboxer.invokeExact(box); break;
case LONG: result = (long) unboxer.invokeExact(box); break;
case FLOAT: result = (int) unboxer.invokeExact(box); break;
case DOUBLE: result = (long) unboxer.invokeExact(box); break;
case CHAR: result = (int) unboxer.invokeExact(box); break;
case BYTE: result = (int) unboxer.invokeExact(box); break;
case SHORT: result = (int) unboxer.invokeExact(box); break;
case BOOLEAN: result = (int) unboxer.invokeExact(box); break;
case VOID: result = (int) unboxer.invokeExact(box); break;
}
assertEquals("(w,n,box)="+Arrays.asList(w,n,box),
expResult, result);
}
}
}
@Test
public void testBox() throws Throwable {
//System.out.println("box");
for (Wrapper w : Wrapper.values()) {
if (w == Wrapper.VOID) continue; // skip this; no unboxed form
//System.out.println(w);
for (int n = -5; n < 10; n++) {
Object box = w.wrap(n);
MethodHandle boxer = ValueConversions.box(w.primitiveType());
Object expResult = box;
Object result = null;
switch (w) {
case INT: result = boxer.invokeExact((int)n); break;
case LONG: result = boxer.invokeExact((long)n); break;
case FLOAT: result = boxer.invokeExact((float)n); break;
case DOUBLE: result = boxer.invokeExact((double)n); break;
case CHAR: result = boxer.invokeExact((char)n); break;
case BYTE: result = boxer.invokeExact((byte)n); break;
case SHORT: result = boxer.invokeExact((short)n); break;
case OBJECT: result = boxer.invokeExact((Object)n); break;
case BOOLEAN: result = boxer.invokeExact((n & 1) != 0); break;
}
assertEquals("(dst,src,n,box)="+Arrays.asList(w,w,n,box),
expResult, result);
}
}
}
@Test
public void testBoxRaw() throws Throwable {
//System.out.println("boxRaw");
for (Wrapper w : Wrapper.values()) {
if (w == Wrapper.VOID) continue; // skip this; no unboxed form
if (w == Wrapper.OBJECT) continue; // skip this; no raw form
//System.out.println(w);
for (int n = -5; n < 10; n++) {
Object box = w.wrap(n);
long raw = w.unwrapRaw(box);
Object expResult = box;
MethodHandle boxer = ValueConversions.boxRaw(w.primitiveType());
Object result = null;
switch (w) {
case INT: result = boxer.invokeExact((int)raw); break;
case LONG: result = boxer.invokeExact(raw); break;
case FLOAT: result = boxer.invokeExact((int)raw); break;
case DOUBLE: result = boxer.invokeExact(raw); break;
case CHAR: result = boxer.invokeExact((int)raw); break;
case BYTE: result = boxer.invokeExact((int)raw); break;
case SHORT: result = boxer.invokeExact((int)raw); break;
case BOOLEAN: result = boxer.invokeExact((int)raw); break;
}
assertEquals("(dst,src,n,box)="+Arrays.asList(w,w,n,box),
expResult, result);
}
}
}
@Test
public void testReboxRaw() throws Throwable {
//System.out.println("reboxRaw");
for (Wrapper w : Wrapper.values()) {
Wrapper pw = Wrapper.forPrimitiveType(w.rawPrimitiveType());
if (w == Wrapper.VOID) continue; // skip this; no unboxed form
if (w == Wrapper.OBJECT) continue; // skip this; no raw form
//System.out.println(w);
for (int n = -5; n < 10; n++) {
Object box = w.wrap(n);
Object raw = pw.wrap(w.unwrapRaw(box));
Object expResult = box;
MethodHandle boxer = ValueConversions.rebox(w.primitiveType());
Object result = null;
switch (w) {
case INT: result = boxer.invokeExact(raw); break;
case LONG: result = boxer.invokeExact(raw); break;
case FLOAT: result = boxer.invokeExact(raw); break;
case DOUBLE: result = boxer.invokeExact(raw); break;
case CHAR: result = boxer.invokeExact(raw); break;
case BYTE: result = boxer.invokeExact(raw); break;
case SHORT: result = boxer.invokeExact(raw); break;
case BOOLEAN: result = boxer.invokeExact(raw); break;
}
assertEquals("(dst,src,n,box)="+Arrays.asList(w,w,n,box),
expResult, result);
}
}
}
@Test
public void testCast() throws Throwable {
//System.out.println("cast");
Class<?>[] types = { Object.class, Serializable.class, String.class, Number.class, Integer.class };
Object[] objects = { new Object(), Boolean.FALSE, "hello", (Long)12L, (Integer)6 };
for (Class<?> dst : types) {
MethodHandle caster = ValueConversions.cast(dst);
assertEquals(caster.type(), ValueConversions.identity().type());
for (Object obj : objects) {
Class<?> src = obj.getClass();
boolean canCast;
if (dst.isInterface()) {
canCast = true;
} else {
canCast = dst.isAssignableFrom(src);
assertEquals(canCast, dst.isInstance(obj));
}
//System.out.println("obj="+obj+" <: dst="+dst);
try {
Object result = caster.invokeExact(obj);
if (canCast)
assertEquals(obj, result);
else
assertEquals("cast should not have succeeded", dst, obj);
} catch (ClassCastException ex) {
if (canCast)
throw ex;
}
}
}
}
@Test
public void testIdentity() throws Throwable {
//System.out.println("identity");
MethodHandle id = ValueConversions.identity();
Object expResult = "foo";
Object result = id.invokeExact(expResult);
// compiler bug: ValueConversions.identity().invokeExact("bar");
assertEquals(expResult, result);
}
@Test
public void testVarargsArray() throws Throwable {
//System.out.println("varargsArray");
final int MIN = START_ARITY;
final int MAX = MAX_ARITY-2; // 253+1 would cause parameter overflow with 'this' added
for (int nargs = MIN; nargs <= MAX; nargs = nextArgCount(nargs, 17, MAX)) {
MethodHandle target = ValueConversions.varargsArray(nargs);
Object[] args = new Object[nargs];
for (int i = 0; i < nargs; i++)
args[i] = "#"+i;
Object res = target.invokeWithArguments(args);
assertArrayEquals(args, (Object[])res);
}
}
@Test
public void testVarargsReferenceArray() throws Throwable {
//System.out.println("varargsReferenceArray");
testTypedVarargsArray(Object[].class);
testTypedVarargsArray(String[].class);
testTypedVarargsArray(Number[].class);
}
@Test
public void testVarargsPrimitiveArray() throws Throwable {
//System.out.println("varargsPrimitiveArray");
testTypedVarargsArray(int[].class);
testTypedVarargsArray(long[].class);
testTypedVarargsArray(byte[].class);
testTypedVarargsArray(boolean[].class);
testTypedVarargsArray(short[].class);
testTypedVarargsArray(char[].class);
testTypedVarargsArray(float[].class);
testTypedVarargsArray(double[].class);
}
private static int nextArgCount(int nargs, int density, int MAX) {
if (EXHAUSTIVE) return nargs + 1;
if (nargs >= MAX) return Integer.MAX_VALUE;
int BOT = 20, TOP = MAX-5;
if (density < 10) { BOT = 10; MAX = TOP-2; }
if (nargs <= BOT || nargs >= TOP) {
++nargs;
} else {
int bump = Math.max(1, 100 / density);
nargs += bump;
if (nargs > TOP) nargs = TOP;
}
return nargs;
}
private void testTypedVarargsArray(Class<?> arrayType) throws Throwable {
System.out.println(arrayType.getSimpleName());
Class<?> elemType = arrayType.getComponentType();
int MIN = START_ARITY;
int MAX = MAX_ARITY-2; // 253+1 would cause parameter overflow with 'this' added
int density = 3;
if (elemType == int.class || elemType == long.class) density = 7;
if (elemType == long.class || elemType == double.class) { MAX /= 2; MIN /= 2; }
for (int nargs = MIN; nargs <= MAX; nargs = nextArgCount(nargs, density, MAX)) {
Object[] args = makeTestArray(elemType, nargs);
MethodHandle varargsArray = ValueConversions.varargsArray(arrayType, nargs);
MethodType vaType = varargsArray.type();
assertEquals(arrayType, vaType.returnType());
if (nargs != 0) {
assertEquals(elemType, vaType.parameterType(0));
assertEquals(elemType, vaType.parameterType(vaType.parameterCount()-1));
}
assertEquals(MethodType.methodType(arrayType, Collections.<Class<?>>nCopies(nargs, elemType)),
vaType);
Object res = varargsArray.invokeWithArguments(args);
String resString = toArrayString(res);
assertEquals(Arrays.toString(args), resString);
MethodHandle spreader = varargsArray.asSpreader(arrayType, nargs);
MethodType stype = spreader.type();
assert(stype == MethodType.methodType(arrayType, arrayType));
if (nargs <= 5) {
// invoke target as a spreader also:
Object res2 = spreader.invokeWithArguments((Object)res);
String res2String = toArrayString(res2);
assertEquals(Arrays.toString(args), res2String);
// invoke the spreader on a generic Object[] array; check for error
try {
Object res3 = spreader.invokeWithArguments((Object)args);
String res3String = toArrayString(res3);
assertTrue(arrayType.getName(), arrayType.isAssignableFrom(Object[].class));
assertEquals(Arrays.toString(args), res3String);
} catch (ClassCastException ex) {
assertFalse(arrayType.getName(), arrayType.isAssignableFrom(Object[].class));
}
}
if (nargs == 0) {
// invoke spreader on null arglist
Object res3 = spreader.invokeWithArguments((Object)null);
String res3String = toArrayString(res3);
assertEquals(Arrays.toString(args), res3String);
}
}
}
private static Object[] makeTestArray(Class<?> elemType, int len) {
Wrapper elem = null;
if (elemType.isPrimitive())
elem = Wrapper.forPrimitiveType(elemType);
else if (Wrapper.isWrapperType(elemType))
elem = Wrapper.forWrapperType(elemType);
Object[] args = new Object[len];
for (int i = 0; i < len; i++) {
Object arg = i * 100;
if (elem == null) {
if (elemType == String.class)
arg = "#"+arg;
arg = elemType.cast(arg); // just to make sure
} else {
switch (elem) {
case BOOLEAN: arg = (i % 3 == 0); break;
case CHAR: arg = 'a' + i; break;
case LONG: arg = (long)i * 1000_000_000; break;
case FLOAT: arg = (float)i / 100; break;
case DOUBLE: arg = (double)i / 1000_000; break;
}
arg = elem.cast(arg, elemType);
}
args[i] = arg;
}
//System.out.println(elemType.getName()+Arrays.toString(args));
return args;
}
private static String toArrayString(Object a) {
if (a == null) return "null";
Class<?> elemType = a.getClass().getComponentType();
if (elemType == null) return a.toString();
if (elemType.isPrimitive()) {
switch (Wrapper.forPrimitiveType(elemType)) {
case INT: return Arrays.toString((int[])a);
case BYTE: return Arrays.toString((byte[])a);
case BOOLEAN: return Arrays.toString((boolean[])a);
case SHORT: return Arrays.toString((short[])a);
case CHAR: return Arrays.toString((char[])a);
case FLOAT: return Arrays.toString((float[])a);
case LONG: return Arrays.toString((long[])a);
case DOUBLE: return Arrays.toString((double[])a);
}
}
return Arrays.toString((Object[])a);
}
@Test
public void testVarargsList() throws Throwable {
//System.out.println("varargsList");
final int MIN = START_ARITY;
final int MAX = MAX_ARITY-2; // 253+1 would cause parameter overflow with 'this' added
for (int nargs = MIN; nargs <= MAX; nargs = nextArgCount(nargs, 7, MAX)) {
MethodHandle target = ValueConversions.varargsList(nargs);
Object[] args = new Object[nargs];
for (int i = 0; i < nargs; i++)
args[i] = "#"+i;
Object res = target.invokeWithArguments(args);
assertEquals(Arrays.asList(args), res);
}
}
}