/*
***************************************************************************************
* 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;
/**
* Context condition that start/initiated or ends/terminates context partitions based on a pattern.
*/
public class ContextDescriptorConditionPattern implements ContextDescriptorCondition {
private static final long serialVersionUID = -481920039587982117L;
private PatternExpr pattern;
private boolean inclusive; // statements declaring the context are inclusive of the events matching the pattern
private boolean now; // statements declaring the context initiate now and matching the pattern
/**
* Ctor.
*/
public ContextDescriptorConditionPattern() {
}
/**
* Ctor.
*
* @param pattern pattern expression
* @param inclusive if the events of the pattern should be included in the contextual statements
* @param now indicator whether "now"
*/
public ContextDescriptorConditionPattern(PatternExpr pattern, boolean inclusive, boolean now) {
this.pattern = pattern;
this.inclusive = inclusive;
this.now = now;
}
/**
* Returns the pattern expression.
*
* @return pattern
*/
public PatternExpr getPattern() {
return pattern;
}
/**
* Sets the pattern expression.
*
* @param pattern to set
*/
public void setPattern(PatternExpr pattern) {
this.pattern = pattern;
}
/**
* Return the inclusive flag, meaning events that constitute the pattern match should be considered for context-associated statements.
*
* @return inclusive flag
*/
public boolean isInclusive() {
return inclusive;
}
/**
* Set the inclusive flag, meaning events that constitute the pattern match should be considered for context-associated statements.
*
* @param inclusive inclusive flag
*/
public void setInclusive(boolean inclusive) {
this.inclusive = inclusive;
}
/**
* 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;
}
public void toEPL(StringWriter writer, EPStatementFormatter formatter) {
if (now) {
writer.write("@now and");
}
writer.write("pattern [");
if (pattern != null) {
pattern.toEPL(writer, PatternExprPrecedenceEnum.MINIMUM, formatter);
}
writer.write("]");
if (inclusive) {
writer.write("@Inclusive");
}
}
}