/*

 * 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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * 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.

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package com.sun.jmx.mbeanserver;

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util.List;

import javax.management.NotCompliantMBeanException;

import javax.management.Notification;

import javax.management.openmbean.MXBeanMappingFactory;

/**

 * <p>A variant of {@code StandardMBeanSupport} where the only

 * methods included are public getters.  This is used by

 * {@code QueryNotificationFilter} to pretend that a Notification is

 * an MBean so it can have a query evaluated on it.  Standard queries

 * never set attributes or invoke methods but custom queries could and

 * we don't want to allow that.  Also we don't want to fail if a

 * Notification happens to have inconsistent types in a pair of getX and

 * setX methods, and we want to include the Object.getClass() method.

 */

public class NotificationMBeanSupport extends StandardMBeanSupport {

    public <T extends Notification> NotificationMBeanSupport(T n)

            throws NotCompliantMBeanException {

        super(n, Util.<Class<T>>cast(n.getClass()));

    }

    @Override

    MBeanIntrospector<Method> getMBeanIntrospector(MXBeanMappingFactory ignored) {

        return introspector;

    }

    private static class Introspector extends StandardMBeanIntrospector {

        @Override

        void checkCompliance(Class<?> mbeanType) {}

        @Override

        List<Method> getMethods(final Class<?> mbeanType)

                throws Exception {

            List<Method> methods = new ArrayList<Method>();

            for (Method m : mbeanType.getMethods()) {

                String name = m.getName();

                Class<?> ret = m.getReturnType();

                if (m.getParameterTypes().length == 0) {

                    if ((name.startsWith("is") && name.length() > 2 &&

                            ret == boolean.class) ||

                        (name.startsWith("get") && name.length() > 3 &&

                            ret != void.class)) {

                        methods.add(m);

                    }

                }

            }

            return methods;

        }

    }

    private static final MBeanIntrospector<Method> introspector =

            new Introspector();

}