/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
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 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
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 * Version 2] license."  If you don't indicate a single choice of license, a
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 * its licensees as provided above.  However, if you add GPL Version 2 code
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 */

/*
 * Copyright 2004-2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
 
/*
 */

package com.sun.enterprise.management.ext.update;

import java.util.logging.Level;
import java.lang.reflect.Method;

import com.sun.appserv.management.base.AMX;
import com.sun.appserv.management.base.XTypes;
import com.sun.appserv.management.ext.update.UpdateStatus;
import com.sun.enterprise.management.support.AMXImplBase;

/**
 */
public final class UpdateStatusImpl extends AMXImplBase
    implements UpdateStatus {
        public
    UpdateStatusImpl() {
        super( );
    }

        public final String
    getGroup() {
        return( AMX.GROUP_UTILITY );
    }

        public int
    getNumModules() {

       // Even though Update Center jars are packaged with Application Server.
       // They could be un-installed. Doing a reflection based  implementation
       // is better that way. 

       int num = 0;
       try {
           final Class c = Class.forName(
            "com.sun.enterprise.update.schedule.SchedulerImpl");
           final Object s = c.newInstance();

           if (s != null) {
                // call getNumberOfModules with zero arguments
                final Class[] paramTypes = null;
                final  Object[] argTypes = null;

                final Method m = c.getMethod("runUpdateCheck", paramTypes);
                final Integer retval = (Integer) m.invoke(s, argTypes);
                num =  retval.intValue();
           }
       } catch(Throwable t) {
            getMBeanLogger().warning(t.getMessage());
            if(getMBeanLogger().isLoggable(Level.FINE))
                t.printStackTrace();

       } 
       return num;
    }

}