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/*
* Copyright (c) 2017, 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.
*
* 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
* @bug 8035776 8173587
* @summary metafactory should fail if instantiatedMethodType does not match sam/bridge descriptors
*/
import java.lang.invoke.*;
import java.util.*;
public class MetafactoryDescriptorTest {
static final MethodHandles.Lookup lookup = MethodHandles.lookup();
static MethodType mt(Class<?> ret, Class<?>... params) {
return MethodType.methodType(ret, params);
}
public interface I {}
public static class C {
public static void m_void(String arg) {}
public static boolean m_boolean(String arg) { return true; }
public static char m_char(String arg) { return 'x'; }
public static byte m_byte(String arg) { return 12; }
public static short m_short(String arg) { return 12; }
public static int m_int(String arg) { return 12; }
public static long m_long(String arg) { return 12; }
public static float m_float(String arg) { return 12; }
public static double m_double(String arg) { return 12; }
public static String m_String(String arg) { return ""; }
public static Integer m_Integer(String arg) { return 23; }
public static Object m_Object(String arg) { return new Object(); }
public static String n_boolean(boolean arg) { return ""; }
public static String n_char(char arg) { return ""; }
public static String n_byte(byte arg) { return ""; }
public static String n_short(short arg) { return ""; }
public static String n_int(int arg) { return ""; }
public static String n_long(long arg) { return ""; }
public static String n_float(float arg) { return ""; }
public static String n_double(double arg) { return ""; }
public static String n_String(String arg) { return ""; }
public static String n_Integer(Integer arg) { return ""; }
public static String n_Object(Object arg) { return ""; }
public static MethodHandle getM(Class<?> c) {
try {
return lookup.findStatic(C.class, "m_" + c.getSimpleName(), mt(c, String.class));
}
catch (NoSuchMethodException | IllegalAccessException e) {
throw new RuntimeException(e);
}
}
public static MethodHandle getN(Class<?> c) {
if (c == void.class) return null;
try {
return lookup.findStatic(C.class, "n_" + c.getSimpleName(), mt(String.class, c));
}
catch (NoSuchMethodException | IllegalAccessException e) {
throw new RuntimeException(e);
}
}
}
public static void main(String... args) {
Class<?>[] t = { void.class, boolean.class, char.class,
byte.class, short.class, int.class, long.class, float.class, double.class,
String.class, Integer.class, Object.class };
for (int i = 0; i < t.length; i++) {
MethodHandle m = C.getM(t[i]);
MethodHandle n = C.getN(t[i]); // null for void.class
for (int j = 0; j < t.length; j++) {
boolean correctRet = t[j].isAssignableFrom(t[i]) || conversions.contains(t[i], t[j]);
test(correctRet, m, mt(t[i], String.class), mt(t[j], String.class));
testBridge(correctRet, m, mt(t[i], String.class), mt(t[i], String.class),
mt(t[j], Object.class));
testBridge(correctRet, m, mt(t[i], String.class), mt(t[i], String.class),
mt(t[i], CharSequence.class), mt(t[j], Object.class));
if (t[i] != void.class && t[j] != void.class) {
boolean correctParam = t[j].isAssignableFrom(t[i]);
test(correctParam, n, mt(String.class, t[i]), mt(String.class, t[j]));
testBridge(correctParam, n, mt(String.class, t[i]), mt(String.class, t[i]),
mt(Object.class, t[j]));
testBridge(correctParam, n, mt(String.class, t[i]), mt(String.class, t[i]),
mt(CharSequence.class, t[i]), mt(Object.class, t[j]));
}
}
}
}
static void test(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) {
tryMetafactory(correct, mh, instMT, samMT);
tryAltMetafactory(correct, mh, instMT, samMT);
}
static void testBridge(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT, MethodType... bridgeMTs) {
tryAltMetafactory(correct, mh, instMT, samMT, bridgeMTs);
}
static void tryMetafactory(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) {
try {
LambdaMetafactory.metafactory(lookup, "run", mt(I.class),
samMT, mh, instMT);
if (!correct) {
throw new AssertionError("Unexpected linkage without error:" +
" impl=" + mh +
", inst=" + instMT +
", sam=" + samMT);
}
}
catch (LambdaConversionException e) {
if (correct) {
throw new AssertionError("Unexpected linkage error:" +
" e=" + e +
", impl=" + mh +
", inst=" + instMT +
", sam=" + samMT);
}
}
}
static void tryAltMetafactory(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT,
MethodType... bridgeMTs) {
boolean bridge = bridgeMTs.length > 0;
Object[] args = new Object[bridge ? 5+bridgeMTs.length : 4];
args[0] = samMT;
args[1] = mh;
args[2] = instMT;
args[3] = bridge ? LambdaMetafactory.FLAG_BRIDGES : 0;
if (bridge) {
args[4] = bridgeMTs.length;
for (int i = 0; i < bridgeMTs.length; i++) args[5+i] = bridgeMTs[i];
}
try {
LambdaMetafactory.altMetafactory(lookup, "run", mt(I.class), args);
if (!correct) {
throw new AssertionError("Unexpected linkage without error:" +
" impl=" + mh +
", inst=" + instMT +
", sam=" + samMT +
", bridges=" + Arrays.toString(bridgeMTs));
}
}
catch (LambdaConversionException e) {
if (correct) {
throw new AssertionError("Unexpected linkage error:" +
" e=" + e +
", impl=" + mh +
", inst=" + instMT +
", sam=" + samMT +
", bridges=" + Arrays.toString(bridgeMTs));
}
}
}
private static class ConversionTable {
private final Map<Class<?>, Set<Class<?>>> pairs = new HashMap<>();
public void put(Class<?> from, Class<?> to) {
Set<Class<?>> set = pairs.computeIfAbsent(from, f -> new HashSet<>());
set.add(to);
}
public boolean contains(Class<?> from, Class<?> to) {
return pairs.containsKey(from) && pairs.get(from).contains(to);
}
}
private static ConversionTable conversions = new ConversionTable();
static {
conversions.put(char.class, int.class);
conversions.put(char.class, long.class);
conversions.put(char.class, float.class);
conversions.put(char.class, double.class);
conversions.put(char.class, Character.class);
conversions.put(char.class, Object.class);
conversions.put(Character.class, char.class);
conversions.put(Character.class, int.class);
conversions.put(Character.class, long.class);
conversions.put(Character.class, float.class);
conversions.put(Character.class, double.class);
conversions.put(byte.class, short.class);
conversions.put(byte.class, int.class);
conversions.put(byte.class, long.class);
conversions.put(byte.class, float.class);
conversions.put(byte.class, double.class);
conversions.put(byte.class, Byte.class);
conversions.put(byte.class, Object.class);
conversions.put(Byte.class, byte.class);
conversions.put(Byte.class, short.class);
conversions.put(Byte.class, int.class);
conversions.put(Byte.class, long.class);
conversions.put(Byte.class, float.class);
conversions.put(Byte.class, double.class);
conversions.put(short.class, int.class);
conversions.put(short.class, long.class);
conversions.put(short.class, float.class);
conversions.put(short.class, double.class);
conversions.put(short.class, Short.class);
conversions.put(short.class, Object.class);
conversions.put(Short.class, short.class);
conversions.put(Short.class, int.class);
conversions.put(Short.class, long.class);
conversions.put(Short.class, float.class);
conversions.put(Short.class, double.class);
conversions.put(int.class, long.class);
conversions.put(int.class, float.class);
conversions.put(int.class, double.class);
conversions.put(int.class, Integer.class);
conversions.put(int.class, Object.class);
conversions.put(Integer.class, int.class);
conversions.put(Integer.class, long.class);
conversions.put(Integer.class, float.class);
conversions.put(Integer.class, double.class);
conversions.put(long.class, float.class);
conversions.put(long.class, double.class);
conversions.put(long.class, Long.class);
conversions.put(long.class, Object.class);
conversions.put(Long.class, long.class);
conversions.put(Long.class, float.class);
conversions.put(Long.class, double.class);
conversions.put(float.class, double.class);
conversions.put(float.class, Float.class);
conversions.put(float.class, Object.class);
conversions.put(Float.class, float.class);
conversions.put(Float.class, double.class);
conversions.put(double.class, Double.class);
conversions.put(double.class, Object.class);
conversions.put(Double.class, double.class);
conversions.put(boolean.class, Boolean.class);
conversions.put(boolean.class, Object.class);
conversions.put(Boolean.class, boolean.class);
}
}
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