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SPL(Structured Process Language) A programming language specially for structured data computing.

There is a newer version: 20241126

package com.scudata.dw.compress;

import java.io.IOException;

import com.scudata.common.RQException;
import com.scudata.dw.BufferReader;

public class NullColumn extends Column {

	public void addData(Object data) {
		throw new RQException("never run to here!");

	}
	
	// ȡ??row?е?????
	public Object getData(int row) {
		return null;
	}
	
	public Column clone() {
		return new NullColumn();
	}

	public void appendData(BufferReader br) throws IOException {
		throw new RQException("never run to here!");
	}
}