/*
* Copyright ( c ) 2010 , 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 5102804
* @ summary Tests memory leak
* @ author Sergey Malenkov
* @ run main / othervm - ms16m - mx16m Test5102804
*/
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 ;
}
}
}
}
Messung V0.5 in Prozent C=97 H=97 G=96
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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