content: /* ================================================================
   * JSQLParser : java based sql parser 
   * ================================================================
   *
   * Project Info:  http://jsqlparser.sourceforge.net
   * Project Lead:  Leonardo Francalanci (leoonardoo@yahoo.it);
   *
   * (C) Copyright 2004, by Leonardo Francalanci
   *
   * This library is free software; you can redistribute it and/or modify it under the terms
   * of the GNU Lesser General Public License as published by the Free Software Foundation;
   * either version 2.1 of the License, or (at your option) any later version.
   *
   * This library 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 Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License along with this
   * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
   * Boston, MA 02111-1307, USA.
   */
  
  package net.sf.jsqlparser.expression;
  
  
  /**
   * A basic class for binary expressions, that is expressions having a left member and a right member
   * which are in turn expressions. 
   */
  public abstract class BinaryExpression implements Expression {
  	private Expression leftExpression;
  	private Expression rightExpression;
  	private boolean not = false;
  
  	public BinaryExpression() {
  	}
  	
  
  	public Expression getLeftExpression() {
  		return leftExpression;
  	}
  
  	public Expression getRightExpression() {
  		return rightExpression;
  	}
  
  	public void setLeftExpression(Expression expression) {
  		leftExpression = expression;
  	}
  
  	public void setRightExpression(Expression expression) {
  		rightExpression = expression;
  	}
  
  	public void setNot() {
  		not = true;
  	}
  
  	public boolean isNot() {
  		return not;
  	}
  
  	public String toString() {
  		return (not? "NOT ":"") + getLeftExpression()+" "+getStringExpression()+" "+getRightExpression();
  	}
  
  	public abstract String getStringExpression();
  	
  }
  