/*
***************************************************************************************
* 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.epl.expression.subquery;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.agg.service.AggregationService;
import com.espertech.esper.epl.expression.core.ExprEvaluator;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import com.espertech.esper.util.SimpleNumberCoercer;
import java.util.Collection;
/**
* Represents a in-subselect evaluation strategy.
*/
public class SubselectEvalStrategyNREqualsInFiltered extends SubselectEvalStrategyNREqualsInBase {
private final ExprEvaluator filterEval;
public SubselectEvalStrategyNREqualsInFiltered(ExprEvaluator valueEval, ExprEvaluator selectEval, boolean notIn, SimpleNumberCoercer coercer, ExprEvaluator filterEval) {
super(valueEval, selectEval, notIn, coercer);
this.filterEval = filterEval;
}
protected Object evaluateInternal(Object leftResult, EventBean[] eventsZeroOffset, boolean isNewData, Collection<EventBean> matchingEvents, ExprEvaluatorContext exprEvaluatorContext, AggregationService aggregationService) {
boolean hasNullRow = false;
for (EventBean subselectEvent : matchingEvents) {
// Prepare filter expression event list
eventsZeroOffset[0] = subselectEvent;
// Eval filter expression
Boolean pass = (Boolean) filterEval.evaluate(eventsZeroOffset, true, exprEvaluatorContext);
if ((pass == null) || (!pass)) {
continue;
}
if (leftResult == null) {
return null;
}
Object rightResult;
if (selectEval != null) {
rightResult = selectEval.evaluate(eventsZeroOffset, true, exprEvaluatorContext);
} else {
rightResult = eventsZeroOffset[0].getUnderlying();
}
if (rightResult == null) {
hasNullRow = true;
} else {
if (coercer == null) {
if (leftResult.equals(rightResult)) {
return !isNotIn;
}
} else {
Number left = coercer.coerceBoxed((Number) leftResult);
Number right = coercer.coerceBoxed((Number) rightResult);
if (left.equals(right)) {
return !isNotIn;
}
}
}
}
if (hasNullRow) {
return null;
}
return isNotIn;
}
}