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/*
* Copyright (c) 2003, 2007, 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 4508780
* @summary Tests shared access to the Introspector cache
* @author Mark Davidson
*/
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
/**
* Multiple classloader test to ensure that methods
* returned by the BeanInfo classes are unique to the classloader.
*/
public class Test4508780 implements Runnable {
/**
* This is here to force the bean classes to be compiled
*/
private static final Class[] COMPILE = {
Bean.class,
Bean2.class,
Bean3.class,
Bean4.class,
};
public static void main(String[] args) {
for (int i = 0; i < 10; i++) test();
}
private static void test() {
test("Bean", "Bean2", "Bean3", "Bean4");
test("Bean4", "Bean", "Bean2", "Bean3");
test("Bean3", "Bean4", "Bean", "Bean2");
test("Bean2", "Bean3", "Bean4", "Bean");
Introspector.flushCaches();
}
private static void test(String... names) {
new Thread(new Test4508780(names)).start();
}
private final ClassLoader loader = new SimpleClassLoader();
private final String[] names;
private Test4508780(String... names) {
this.names = names;
}
public void run() {
for (String name : this.names) {
Object bean;
try {
bean = this.loader.loadClass(name).newInstance();
} catch (Exception exception) {
throw new Error("could not instantiate bean: " + name, exception);
}
if (this.loader != bean.getClass().getClassLoader()) {
throw new Error("bean class loader is not equal to default one");
}
PropertyDescriptor[] pds = getPropertyDescriptors(bean);
for (PropertyDescriptor pd : pds) {
Class type = pd.getPropertyType();
Method setter = pd.getWriteMethod();
Method getter = pd.getReadMethod();
if (type.equals(String.class)) {
executeMethod(setter, bean, "Foo");
} else if (type.equals(int.class)) {
executeMethod(setter, bean, Integer.valueOf(1));
}
executeMethod(getter, bean);
}
}
}
private static void executeMethod(Method method, Object bean, Object... args) {
if (method == null) {
throw new Error("method is null");
}
if (bean == null) {
throw new Error("target bean is null");
}
try {
method.invoke(bean, args);
} catch (Exception exception) {
throw new Error("could not execute method: " + method, exception);
}
}
private static PropertyDescriptor[] getPropertyDescriptors(Object object) {
Class type = object.getClass();
synchronized (System.out) {
System.out.println(type);
ClassLoader loader = type.getClassLoader();
while (loader != null) {
System.out.println(" - loader: " + loader);
loader = loader.getParent();
}
}
try {
return Introspector.getBeanInfo(type).getPropertyDescriptors();
} catch (IntrospectionException exception) {
throw new Error("unexpected exception", exception);
}
}
}
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