comparison.java

一个java的ETL工具

public class Comparison
{
	private String operator;
	private String relationToPrevious;
	private String firstOperand;
	private String secondOperand;
	
	//  Constructors
	
	public Comparison(String _operator, String _firstOperand, String _secondOperand)
	{
		this(_operator, "", _firstOperand, _secondOperand);
	}

	public Comparison(String _operator, String _relationToPrevious, String _firstOperand, String _secondOperand)
	{
		operator = _operator;
		relationToPrevious = _relationToPrevious;
		firstOperand = _firstOperand;
		secondOperand = _secondOperand;
	}

	//  Accessor Methods
	
	public String getOperator()
	{
		return operator;
	}
	
	public String getRelationToPrevious()
	{
		return relationToPrevious;
	}
	
	public String getFirstOperand()
	{
		return firstOperand;
	}
	
	public String getSecondOperand()
	{
		return secondOperand;
	}
	
	public String toString()
	{
		String returnString = "";
		
		if (!relationToPrevious.equals("")) returnString = returnString + "\t" + relationToPrevious + "\n";
		returnString = returnString + firstOperand + " " + operator + " " + secondOperand;
		returnString = returnString + "\n";

		return returnString;
	}
}