globalconstraint.java

与postgresql数据库结合的数据库水印软件包

/*
 * 
 * Copyright 2003,2004 The Watermill Team
 *
 * This file is part of Watermill.
 *
 *    Watermill is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    Watermill is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with Watermill; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
package Watermill.kernel;

import java.io.*;

public class GlobalConstraint implements Serializable {

    public String tableName;
    public String attributeName;
    public String keyName;
    public int distortion;
    public String condition;

    public GlobalConstraint(GlobalConstraint gc){
	this.tableName=gc.tableName;
	this.attributeName=gc.attributeName;
	this.keyName=gc.keyName;
	this.distortion=gc.distortion;
	this.condition=gc.condition;
    }

    public GlobalConstraint(int distortion,String keyName,String attributeName,String tableName,String condition){
	this.distortion=distortion;
	this.keyName=keyName;
	this.attributeName=attributeName;
	this.tableName=tableName;
	this.condition=condition;
    }
    
    public String toString(){
	return "global constraint "+distortion+"% on query (select "+keyName+","+attributeName+" from "+tableName+" where "+condition+")";
    }
}