/*

 * 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;

            }

        }

    }

}