/**
 * Copyright (c) 2008 CDO2 Limited.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of CDO2 Limited nor the names of its contributors
 *       may be used to endorse or promote products derived from this
 *       software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY CDO2 LIMITED ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.scatterspace.blitz.jmx;

import java.rmi.RemoteException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.dancres.blitz.remote.StatsAdmin;
import org.dancres.blitz.stats.Stat;

public abstract class AbstractStatsImpl<T extends Stat>
{
    private Logger log_ = Logger.getLogger(getClass().getName());
    
    private StatsAdmin admin_;
    private Class<? extends Stat> statClazz_;
    
    public AbstractStatsImpl(StatsAdmin admin, Class<T> stat)
    {
        admin_ = admin;
        statClazz_ = stat;
    }
    
    @SuppressWarnings("unchecked")
    protected Collection<T> getStatistics()
    {
        Stat[] allStats;
        try
        {
            allStats = admin_.getStats();
        }
        catch (RemoteException e)
        {
            log_.log(Level.WARNING, "Remote exception while getting stats", e);
            return Collections.emptyList();
        }
        
        Collection<T> ret = new ArrayList<T>();
        for (Stat stat : allStats)
        {
            if (statClazz_.isInstance(stat))
            {
                ret.add((T) statClazz_.cast(stat));
            }
        }
        
        return ret;
    }

    @Override
    public String toString()
    {
        String name = getClass().getSimpleName();
        if (name.endsWith("Impl"))
        {
            name = name.substring(0, name.length() - 4);
        }
        
        return "type=" + name;
    }
}