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

There is a newer version: 20240823

package com.scudata.dw.compress;

import java.io.IOException;

import com.scudata.dw.BufferReader;

/**
 * ?ڴ???
 * ʹ?û??????ʹ?һ??????
 * @author runqian
 *
 */
public abstract class Column implements Cloneable {
	public static final int BLOCK_RECORD_COUNT = 8192; // ÿ???¼??
	/**
	 * ׷??һ?е?????
	 * @param data
	 */
	abstract public void addData(Object data);
	
	/**
	 * ȡ??row?е?????
	 * @param row
	 * @return
	 */
	abstract public Object getData(int row);
	
	abstract public Column clone();
	
	/**
	 * ??br??һ??????׷?ӵ???
	 * @param br
	 * @throws IOException
	 */
	abstract public void appendData(BufferReader br) throws IOException ;
}