/*******************************************************************************
 * Copyright (c) 2012 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.maps.pojo;

import java.awt.Image;

import org.simantics.maps.query.IQueryListener;
import org.simantics.maps.query.Query;
import org.simantics.maps.tile.IFilter;
import org.simantics.maps.tile.ITileJobQueue;
import org.simantics.maps.tile.ITileListener;
import org.simantics.maps.tile.ITileProvider;
import org.simantics.maps.tile.TileKey;

/**
 * @author Tuukka Lehtonen
 * @see TileJob
 */
public class TileJobQueue implements ITileJobQueue {

    private TileJob       job;

    public TileJobQueue() {
    }

    public void setTileProvider(ITileProvider provider) {
        getJob().setTileProvider(provider);
    }

    public synchronized TileJob getJob() {
        if (job == null)
            job = new TileJob();
        return job;
    }

    @Override
    public void addJob(final TileKey key, final ITileListener listener) {
        getJob().addJob(new Query<TileKey, Image>(key, new IQueryListener<TileKey, Image>() {
            @Override
            public void queryCanceled(Query<TileKey, Image> job) {
                listener.tileCanceled(key);
            }
            @Override
            public void queryFailed(Query<TileKey, Image> job, Exception error) {
                listener.tileFailed(key, error);
            }
            @Override
            public void queryComplete(Query<TileKey, Image> job, Image result) {
                listener.tileUpdated(key, result);
            }
        }));
    }

    @Override
    public void filterQueries(IFilter<TileKey> filter) {
        getJob().filterQueries(filter);
    }

    public void addAsFirstJob(Query<TileKey, Image> job) {
        getJob().addAsFirstJob(job);
    }

    public void removeJob(Query<TileKey, Image> job) {
        getJob().removeJob(job);
    }

    @Override
    public void clear() {
        getJob().clear();
        getJob().dispose();
    }

}