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package com.codetaco.funnel;

import java.io.IOException;
import java.text.ParseException;

/**
 * 
 * FunnelDataProvider interface.
 * 
 *
 * @author Chris DeGreef [email protected]
 */
public interface FunnelDataProvider
{
    /**
     * 
     * actualNumberOfRows.
     * 
     *
     * @return a long.
     */
    public long actualNumberOfRows();

    /**
     * 
     * attachTo.
     * 
     *
     * @param item a {@link com.codetaco.funnel.FunnelItem} object.
     */
    public void attachTo(FunnelItem item);

    /**
     * 
     * close.
     * 
     *
     * @throws java.io.IOException if any.
     * @throws java.text.ParseException if any.
     */
    public void close() throws IOException, ParseException;

    /**
     * 
     * maximumNumberOfRows.
     * 
     *
     * @return a long.
     */
    public long maximumNumberOfRows();

    /**
     * 
     * next.
     * 
     *
     * @param item a {@link com.codetaco.funnel.FunnelItem} object.
     * @param phase a long.
     * @return a boolean.
     * @throws java.io.IOException if any.
     * @throws java.text.ParseException if any.
     */
    public boolean next(FunnelItem item, long phase) throws IOException, ParseException;

    /**
     * 
     * reset.
     * 
     *
     * @throws java.io.IOException if any.
     * @throws java.text.ParseException if any.
     */
    public void reset() throws IOException, ParseException;
}