/*
***************************************************************************************
* 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;
import java.util.List;
/**
* Context condition that start/initiated or ends/terminates context partitions based on a crontab expression.
*/
public class ContextDescriptorConditionCrontab implements ContextDescriptorCondition {
private static final long serialVersionUID = 5676956299459269157L;
private List<Expression> crontabExpressions;
private boolean now;
/**
* Ctor.
*/
public ContextDescriptorConditionCrontab() {
}
/**
* Ctor.
*
* @param crontabExpressions crontab expressions returning number sets for each crontab position
* @param now indicator whethet to include "now"
*/
public ContextDescriptorConditionCrontab(List<Expression> crontabExpressions, boolean now) {
this.crontabExpressions = crontabExpressions;
this.now = now;
}
/**
* Returns the crontab expressions.
*
* @return crontab
*/
public List<Expression> getCrontabExpressions() {
return crontabExpressions;
}
/**
* Sets the crontab expressions.
*
* @param crontabExpressions to set
*/
public void setCrontabExpressions(List<Expression> crontabExpressions) {
this.crontabExpressions = crontabExpressions;
}
public void toEPL(StringWriter writer, EPStatementFormatter formatter) {
write(writer, crontabExpressions, now);
}
/**
* Returns "now" indicator
*
* @return "now" indicator
*/
public boolean isNow() {
return now;
}
/**
* Sets "now" indicator
*
* @param now "now" indicator
*/
public void setNow(boolean now) {
this.now = now;
}
private static void write(StringWriter writer, List<Expression> expressions, boolean now) {
if (now) {
writer.append("@now and ");
}
writer.append("(");
String delimiter = "";
for (Expression e : expressions) {
writer.append(delimiter);
e.toEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
delimiter = ", ";
}
writer.append(")");
}
}