/**************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* 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;
/**
* In-expression for a set of values returned by a lookup.
*/
public class SubqueryInExpression extends ExpressionBase
{
private boolean notIn;
private EPStatementObjectModel model;
private static final long serialVersionUID = 8013096666658967181L;
/**
* Ctor.
*/
public SubqueryInExpression() {
}
/**
* Ctor - for use to create an expression tree, without child expression.
* @param model is the lookup statement object model
* @param isNotIn is true for not-in
*/
public SubqueryInExpression(EPStatementObjectModel model, boolean isNotIn)
{
this.model = model;
this.notIn = isNotIn;
}
/**
* Ctor - for use to create an expression tree, without child expression.
* @param expression is the expression providing the value to match
* @param model is the lookup statement object model
* @param isNotIn is true for not-in
*/
public SubqueryInExpression(Expression expression, EPStatementObjectModel model, boolean isNotIn)
{
this.getChildren().add(expression);
this.model = model;
this.notIn = isNotIn;
}
/**
* Returns true for not-in, or false for in-lookup.
* @return true for not-in
*/
public boolean isNotIn()
{
return notIn;
}
/**
* Set to true for not-in, or false for in-lookup.
* @param notIn true for not-in
*/
public void setNotIn(boolean notIn)
{
this.notIn = notIn;
}
public ExpressionPrecedenceEnum getPrecedence() {
return ExpressionPrecedenceEnum.UNARY;
}
public void toPrecedenceFreeEPL(StringWriter writer) {
this.getChildren().get(0).toEPL(writer, getPrecedence());
if (notIn)
{
writer.write(" not in (");
}
else
{
writer.write(" in (");
}
writer.write(model.toEPL());
writer.write(')');
}
/**
* Returns the lookup statement object model.
* @return lookup model
*/
public EPStatementObjectModel getModel()
{
return model;
}
/**
* Sets the lookup statement object model.
* @param model is the lookup model to set
*/
public void setModel(EPStatementObjectModel model)
{
this.model = model;
}
}