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/*
* Copyright (c) 2004, 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 5097856
* @summary Computing hashCode of objects modeling generics shouldn't blow stack
* @author Joseph D. Darcy
*/
import java.util.*;
import java.lang.reflect.*;
public class HashCodeTest {
// Mutually recursive interface types
interface Edge<N extends Node<? extends Edge<N>>> {
void setEndNode(N n);
}
interface Node<E extends Edge<? extends Node<E>>> {
E getOutEdge();
}
public static void main(String argv[]) {
List<Class<?>> classes = new ArrayList<Class<?>>();
Set<TypeVariable> typeVariables = new HashSet<TypeVariable>();
classes.add(java.lang.Class.class);// Simple case
classes.add(java.util.Map.class);
classes.add(java.lang.Enum.class); // Contains f-bound
classes.add(Edge.class);
classes.add(Node.class);
for(Class<?> clazz: classes) {
System.out.println(clazz);
for (TypeVariable<?> tv : clazz.getTypeParameters()) {
int hc = tv.hashCode();
typeVariables.add(tv);
System.out.printf("\t%s 0x%x (%d)%n", tv.getName(), hc, hc);
}
}
// Loop over classes again, making sure all type variables are
// already present
int count = 0;
for(Class<?> clazz: classes) {
for (TypeVariable<?> tv : clazz.getTypeParameters()) {
if (!typeVariables.remove(tv))
throw new RuntimeException("Type variable " + tv + " not found.");
}
}
if (typeVariables.size() != 0 )
throw new RuntimeException("Unexpected number of type variables.");
}
}
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