// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.bo.views.caching;

import java.util.*;

public class TemporalTriggerManager {
    public interface AnyResponseListener {
        void response();
    }

    private static AnyResponseListener NULL = new AnyResponseListener() {
        public void response() {
        }
    };

    private static final TemporalTriggerManager INSTANCE = new TemporalTriggerManager();

    private AnyResponseListener mAnyResponseListener = NULL;

    public static TemporalTriggerManager get() {
        return INSTANCE;
    }

    /**
     * This is not a very good implementation, but since we are currently only planning 1 Listener, it is more than adiquate
     */
    private List<TemporalTriggerListener> mListeners = new ArrayList<TemporalTriggerListener>();

    public synchronized void add( TemporalTriggerListener pListener ) {
        if ( pListener != null ) {
            mListeners.add( pListener );
        }
    }

    public synchronized void dispatch( TemporalTrigger pTrigger ) {
        if ( pTrigger != null ) {
            String zKey = pTrigger.getKey();
            if ( zKey != null ) {
                for ( TemporalTriggerListener zListener : mListeners ) {
                    if ( zKey.equals( zListener.getKey() ) ) {
                        zListener.update( pTrigger.getTimestamp() );
                    }
                }
            }
        }
    }

    public void set( AnyResponseListener pAnyResponseListener ) {
        mAnyResponseListener = (pAnyResponseListener != null) ? pAnyResponseListener : NULL;
    }

    public void response() {
        mAnyResponseListener.response();
    }
}