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/*
 * Fabric3
 * Copyright (c) 2009-2013 Metaform Systems
 *
 * Fabric3 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version, with the
 * following exception:
 *
 * Linking this software statically or dynamically with other
 * modules is making a combined work based on this software.
 * Thus, the terms and conditions of the GNU General Public
 * License cover the whole combination.
 *
 * As a special exception, the copyright holders of this software
 * give you permission to link this software with independent
 * modules to produce an executable, regardless of the license
 * terms of these independent modules, and to copy and distribute
 * the resulting executable under terms of your choice, provided
 * that you also meet, for each linked independent module, the
 * terms and conditions of the license of that module. An
 * independent module is a module which is not derived from or
 * based on this software. If you modify this software, you may
 * extend this exception to your version of the software, but
 * you are not obligated to do so. If you do not wish to do so,
 * delete this exception statement from your version.
 *
 * Fabric3 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the
 * GNU General Public License along with Fabric3.
 * If not, see .
*/
package org.fabric3.fabric.handler;

import org.oasisopen.sca.ServiceRuntimeException;

import org.fabric3.spi.channel.EventStreamHandler;
import org.fabric3.spi.transform.TransformationException;
import org.fabric3.spi.transform.Transformer;

/**
 * Converts the event to a target format by delegating to a transformer.
 */
public class TransformerHandler implements EventStreamHandler {
    private Transformer transformer;
    private ClassLoader loader;
    private EventStreamHandler next;

    /**
     * Constructor.
     *
     * @param transformer the transformer
     * @param loader      the event type classloader
     */
    public TransformerHandler(Transformer transformer, ClassLoader loader) {
        this.transformer = transformer;
        this.loader = loader;
    }

    public void handle(Object event, boolean endOfBatch) {
        try {
            Object o = transformer.transform(event, loader);
            next.handle(o, endOfBatch);
        } catch (TransformationException e) {
            throw new ServiceRuntimeException(e);
        }
    }

    public void setNext(EventStreamHandler next) {
        this.next = next;
    }

    public EventStreamHandler getNext() {
        return next;
    }

}