/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.client.soda;
import java.io.StringWriter;
/**
* Not-expression for negating a pattern sub-expression for use in pattern expressions.
*/
public class PatternNotExpr extends PatternExprBase {
private static final long serialVersionUID = -7739688374458616308L;
/**
* Ctor - for use to create a pattern expression tree, without pattern child expression.
*/
public PatternNotExpr() {
}
/**
* Ctor.
*
* @param inner is the pattern expression to negate
*/
public PatternNotExpr(PatternExpr inner) {
this.getChildren().add(inner);
}
public PatternExprPrecedenceEnum getPrecedence() {
return PatternExprPrecedenceEnum.EVERY_NOT;
}
public void toPrecedenceFreeEPL(StringWriter writer, EPStatementFormatter formatter) {
writer.write("not ");
this.getChildren().get(0).toEPL(writer, getPrecedence(), formatter);
}
}