/* ================================================================
* 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.operators.relational;
import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.ExpressionVisitor;
public class IsNullExpression implements Expression {
private Expression leftExpression;
private boolean not = false;
private boolean prior = false;
private String commentIs;
private String commentNot;
private String commentNull;
private String commentPrior;
public Expression getLeftExpression() {
return leftExpression;
}
public boolean isNot() {
return not;
}
public void setLeftExpression(Expression expression) {
leftExpression = expression;
}
public void setNot(boolean b) {
not = b;
}
public boolean isPrior() {
return prior;
}
public void setPrior(boolean prior) {
this.prior = prior;
}
public void accept(ExpressionVisitor expressionVisitor) {
expressionVisitor.visit(this);
}
@Override
public String toString() {
return (prior ? (getCommentPrior() != null ? getCommentPrior()+" " : "") + "PRIOR " : "")
+ leftExpression + (getCommentIs() != null ? " "+getCommentIs() : "")+ " IS "
+ (not ? (getCommentNot() != null ? getCommentNot()+" " : "") + "NOT " : "")
+ (getCommentNull() != null ? getCommentNull()+" " : "") + "NULL";
}
/**
* @return the commentIs
*/
public String getCommentIs() {
return commentIs;
}
/**
* @param commentIs the commentIs to set
*/
public void setCommentIs(String commentIs) {
this.commentIs = commentIs;
}
/**
* @return the commentNot
*/
public String getCommentNot() {
return commentNot;
}
/**
* @param commentNot the commentNot to set
*/
public void setCommentNot(String commentNot) {
this.commentNot = commentNot;
}
/**
* @return the commentNull
*/
public String getCommentNull() {
return commentNull;
}
/**
* @param commentNull the commentNull to set
*/
public void setCommentNull(String commentNull) {
this.commentNull = commentNull;
}
/**
* @return the commentPrior
*/
public String getCommentPrior() {
return commentPrior;
}
/**
* @param commentPrior the commentPrior to set
*/
public void setCommentPrior(String commentPrior) {
this.commentPrior = commentPrior;
}
}