Test5102804.java revision 1987
0N/A/*
0N/A * Copyright 2009 Sun Microsystems, Inc. All Rights Reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @test
* @bug 5102804
* @summary Tests memory leak
* @author Sergey Malenkov
*/
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.beans.SimpleBeanInfo;
import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import java.net.URL;
import java.net.URLClassLoader;
public class Test5102804 {
private static final String BEAN_NAME = "Test5102804$Example";
private static final String BEAN_INFO_NAME = BEAN_NAME + "BeanInfo";
public static void main(String[] args) {
if (!isCollectible(getReference()))
throw new Error("Reference is not collected");
}
private static Reference getReference() {
try {
ClassLoader loader = new Loader();
Class type = Class.forName(BEAN_NAME, true, loader);
if (!type.getClassLoader().equals(loader)) {
throw new Error("Wrong class loader");
}
BeanInfo info = Introspector.getBeanInfo(type);
if (0 != info.getDefaultPropertyIndex()) {
throw new Error("Wrong bean info found");
}
return new WeakReference<Class>(type);
}
catch (IntrospectionException exception) {
throw new Error("Introspection Error", exception);
}
catch (ClassNotFoundException exception) {
throw new Error("Class Not Found", exception);
}
}
private static boolean isCollectible(Reference reference) {
int[] array = new int[10];
while (true) {
try {
array = new int[array.length + array.length / 3];
}
catch (OutOfMemoryError error) {
return null == reference.get();
}
}
}
/**
* Custom class loader to load the Example class by itself.
* Could also load it from a different code source, but this is easier to set up.
*/
private static final class Loader extends URLClassLoader {
Loader() {
super(new URL[] {
Test5102804.class.getProtectionDomain().getCodeSource().getLocation()
});
}
@Override
protected Class loadClass(String name, boolean resolve) throws ClassNotFoundException {
Class c = findLoadedClass(name);
if (c == null) {
if (BEAN_NAME.equals(name) || BEAN_INFO_NAME.equals(name)) {
c = findClass(name);
}
else try {
c = getParent().loadClass(name);
}
catch (ClassNotFoundException exception) {
c = findClass(name);
}
}
if (resolve) {
resolveClass(c);
}
return c;
}
}
/**
* A simple bean to load from the Loader class, not main class loader.
*/
public static final class Example {
private int value;
public int getValue() {
return value;
}
public void setValue(int value) {
this.value = value;
}
}
/**
* The BeanInfo for the Example class.
* It is also loaded from the Loader class.
*/
public static final class ExampleBeanInfo extends SimpleBeanInfo {
@Override
public int getDefaultPropertyIndex() {
return 0;
}
@Override
public PropertyDescriptor[] getPropertyDescriptors() {
try {
return new PropertyDescriptor[] {
new PropertyDescriptor("value", Class.forName(BEAN_NAME))
};
}
catch (ClassNotFoundException exception) {
return null;
}
catch (IntrospectionException exception) {
return null;
}
}
}
}