com.espertech.esper.client.soda.Conjunction Maven / Gradle / Ivy
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/*
***************************************************************************************
* 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;
/**
* Conjunction represents a logical AND allowing multiple sub-expressions to be connected by AND.
*/
public class Conjunction extends Junction {
private static final long serialVersionUID = 755557538634794086L;
/**
* Ctor - for use to create an expression tree, without child expression.
*
* Use add methods to add child expressions to acts upon.
*/
public Conjunction() {
}
/**
* Ctor.
*
* @param first provides value to AND
* @param second provides value to AND
* @param expressions is more expressions to put in the AND-relationship.
*/
public Conjunction(Expression first, Expression second, Expression... expressions) {
addChild(first);
addChild(second);
for (int i = 0; i < expressions.length; i++) {
addChild(expressions[i]);
}
}
public ExpressionPrecedenceEnum getPrecedence() {
return ExpressionPrecedenceEnum.AND;
}
public void toPrecedenceFreeEPL(StringWriter writer) {
String delimiter = "";
for (Expression child : this.getChildren()) {
writer.write(delimiter);
child.toEPL(writer, getPrecedence());
delimiter = " and ";
}
}
}