/**
 *
 *   Copyright 2015 sourceforge.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
package org.gwtopenmaps.openlayers.client.handler.chain;

import org.gwtopenmaps.openlayers.client.handler.Handler;
import org.gwtopenmaps.openlayers.client.util.JSObject;

/**
 *
 * @author Giuseppe La Scaleia - CNR IMAA geoSDI Group
 * @email giuseppe.lascaleia@geosdi.org
 */
public abstract class ChainHandler {

    private ChainHandler successor;

    /**
     * @param theSuccessor the successor to set
     */
    public void setSuccessor(ChainHandler theSuccessor) {
        this.successor = theSuccessor;
    }

    public abstract <H extends Handler> H buildHandler(JSObject jsObject);

    protected <H extends Handler> H forwardBuildHandler(JSObject jsObject) {
        if (successor != null) {
            return successor.buildHandler(jsObject);
        }

        return null;
    }

    protected abstract String getClassHandlerType();

    protected boolean canBuildHandler(String theClassHandlerType) {
        return getClassHandlerType().equalsIgnoreCase(theClassHandlerType);
    }

}