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package org.glassfish.admin.amx.impl.util;

import java.util.Set;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import org.glassfish.admin.amx.core.AMXProxy;
import org.glassfish.admin.amx.core.proxy.ProxyFactory;

public final class ImplUtil {

    private static void debug(final String s) {
        System.out.println(s);
    }

    /**
    Unload this AMX MBean and all its children.
    MBean should be unloaded at the leafs first, working back to DomainRoot so as to
    not violate the rule that a Container must always be present for a Containee.
     */
    public static void unregisterAMXMBeans(final AMXProxy top) {
        if (top == null) {
            throw new IllegalArgumentException();
        }

        //debug( "ImplUtil.unregisterOneMBean: unregistering hierarchy under: " + top.objectName() );

        final MBeanServer mbeanServer = (MBeanServer) top.extra().mbeanServerConnection();

        final Set children = top.extra().childrenSet();
        if (children != null) {
            // unregister all Containees first
            for (final AMXProxy amx : children) {
                unregisterAMXMBeans(amx);
            }
        }

        unregisterOneMBean(mbeanServer, top.objectName());
    }

    /** see javadoc for unregisterAMXMBeans(AMX) */
    public static void unregisterAMXMBeans(final MBeanServer mbs, final ObjectName objectName) {
        unregisterAMXMBeans(ProxyFactory.getInstance(mbs).getProxy(objectName, AMXProxy.class));
    }

    /**
    Unregister a single MBean, returning true if it was unregistered, false otherwise.
     */
    public static boolean unregisterOneMBean(final MBeanServer mbeanServer, final ObjectName objectName) {
        boolean success = false;
        //getLogger().fine( "UNREGISTER MBEAN: " + objectName );
        //debug( "ImplUtil.unregisterOneMBean: unregistering: " + objectName );
        try {
            mbeanServer.unregisterMBean(objectName);
        } catch (final Exception e) {
            // ignore
            success = false;
        }
        return success;
    }
}