/*
***************************************************************************************
* 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.agg.factory;
import com.espertech.esper.client.EventType;
import com.espertech.esper.epl.agg.access.AggregationAccessor;
import com.espertech.esper.epl.agg.access.AggregationAgent;
import com.espertech.esper.epl.agg.access.AggregationStateKey;
import com.espertech.esper.epl.agg.aggregator.*;
import com.espertech.esper.epl.agg.service.AggregationMethodFactory;
import com.espertech.esper.epl.agg.service.AggregationStateFactory;
import com.espertech.esper.epl.agg.service.AggregationValidationUtil;
import com.espertech.esper.epl.expression.baseagg.ExprAggregateNodeBase;
import com.espertech.esper.epl.expression.core.ExprEvaluator;
import com.espertech.esper.epl.expression.core.ExprValidationException;
import com.espertech.esper.epl.expression.methodagg.ExprMethodAggUtil;
import com.espertech.esper.epl.expression.methodagg.ExprRateAggNode;
import com.espertech.esper.epl.expression.time.TimeAbacus;
import com.espertech.esper.schedule.TimeProvider;
public class AggregationMethodFactoryRate implements AggregationMethodFactory {
protected final ExprRateAggNode parent;
protected final boolean isEver;
protected final long intervalTime;
protected final TimeProvider timeProvider;
protected final TimeAbacus timeAbacus;
public AggregationMethodFactoryRate(ExprRateAggNode parent, boolean isEver, long intervalTime, TimeProvider timeProvider, TimeAbacus timeAbacus) {
this.parent = parent;
this.isEver = isEver;
this.intervalTime = intervalTime;
this.timeProvider = timeProvider;
this.timeAbacus = timeAbacus;
}
public boolean isAccessAggregation() {
return false;
}
public Class getResultType() {
return Double.class;
}
public AggregationStateKey getAggregationStateKey(boolean isMatchRecognize) {
throw new IllegalStateException("Not an access aggregation function");
}
public AggregationStateFactory getAggregationStateFactory(boolean isMatchRecognize) {
throw new IllegalStateException("Not an access aggregation function");
}
public AggregationAccessor getAccessor() {
throw new IllegalStateException("Not an access aggregation function");
}
public AggregationMethod make() {
if (isEver) {
if (parent.getPositionalParams().length == 0) {
return new AggregatorRateEver(intervalTime, timeAbacus.getOneSecond(), timeProvider);
} else {
return new AggregatorRateEverFilter(intervalTime, timeAbacus.getOneSecond(), timeProvider);
}
} else {
if (parent.getOptionalFilter() != null) {
return new AggregatorRateFilter(timeAbacus.getOneSecond());
}
return new AggregatorRate(timeAbacus.getOneSecond());
}
}
public ExprAggregateNodeBase getAggregationExpression() {
return parent;
}
public void validateIntoTableCompatible(AggregationMethodFactory intoTableAgg) throws ExprValidationException {
AggregationValidationUtil.validateAggregationType(this, intoTableAgg);
AggregationMethodFactoryRate that = (AggregationMethodFactoryRate) intoTableAgg;
if (intervalTime != that.intervalTime) {
throw new ExprValidationException("The size is " +
intervalTime +
" and provided is " +
that.intervalTime);
}
AggregationValidationUtil.validateAggregationUnbound(!isEver, !that.isEver);
}
public AggregationAgent getAggregationStateAgent() {
return null;
}
public ExprEvaluator getMethodAggregationEvaluator(boolean join, EventType[] typesPerStream) throws ExprValidationException {
return ExprMethodAggUtil.getDefaultEvaluator(parent.getPositionalParams(), join, typesPerStream);
}
}