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/*
* Copyright (c) 2014, 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.
*/
import java.lang.invoke.MethodHandle;
import java.lang.reflect.InvocationTargetException;
/**
* Abstract class for lambda forms caching testing.
*
* @author kshefov
*/
public abstract class LFCachingTestCase extends LambdaFormTestCase {
/**
* Constructor for lambda forms caching test case.
*
* @param testMethod A method from {@code j.l.i.MethodHandles} class that
* returns a {@code j.l.i.MethodHandle} instance.
*/
protected LFCachingTestCase(TestMethods testMethod) {
super(testMethod);
}
/**
* Checks that the lambda forms of the two adapter method handles adapter1
* and adapter2 are the same.
*
* @param adapter1 First method handle.
* @param adapter2 Second method handle.
*/
public void checkLFCaching(MethodHandle adapter1, MethodHandle adapter2) {
try {
if (!adapter1.type().equals(adapter2.type())) {
throw new Error("TESTBUG: Types of the two method handles are not the same");
}
Object lambdaForm0 = LambdaFormTestCase.INTERNAL_FORM.invoke(adapter1);
Object lambdaForm1 = LambdaFormTestCase.INTERNAL_FORM.invoke(adapter2);
if (lambdaForm0 == null || lambdaForm1 == null) {
throw new Error("Unexpected error: One or both lambda forms of the method handles are null");
}
if (lambdaForm0 != lambdaForm1) {
// Since LambdaForm caches are based on SoftReferences, GC can cause element eviction.
if (noGCHappened()) {
System.err.println("Lambda form 0 toString is:");
System.err.println(lambdaForm0);
System.err.println("Lambda form 1 toString is:");
System.err.println(lambdaForm1);
throw new AssertionError("Error: Lambda forms of the two method handles"
+ " are not the same. LF cahing does not work");
} else {
System.err.println("LambdaForms differ, but there was a GC in between. Ignore the failure.");
}
}
} catch (IllegalAccessException | IllegalArgumentException |
SecurityException | InvocationTargetException ex) {
throw new Error("Unexpected exception: ", ex);
}
}
}
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