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package com.sun.grizzly.portunif;

import com.sun.grizzly.Context;
import java.io.IOException;

/**
 *
 * @author Alexey Stashok
 */
public interface PUPreProcessor {

    /**
     * Returns PUPreProcessor id
     * 
     * @return PUPreProcessor id
     */
    public String getId();

    /**
     * Method performs data preprocessing, before it will be passed to 
     * ProtocolFinder collection
     * 
     * @return true, if preprocessing was completed and initial data was changed, 
     * false if preprocessing didn't change anything in the source data set
     */
    public boolean process(Context context, 
            PUProtocolRequest protocolRequest) throws IOException;
    
    /**
     * Method is called if no ProtocolFinder was found.
     * PUPreProcessor should restore PUProtocolRequest
     * and make it ready for the next data read operation.
     */
    public void postProcess(Context context, 
            PUProtocolRequest protocolRequest) throws IOException;
}