/*
* *************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* 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.service;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.agg.access.AggregationAccessorSlotPair;
import com.espertech.esper.epl.agg.access.AggregationState;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import com.espertech.esper.metrics.instrumentation.InstrumentationHelper;
import java.util.Collection;
/**
* Aggregation service for use when only first/last/window aggregation functions are used an none other.
*/
public class AggSvcGroupAllAccessOnlyImpl implements AggregationService, AggregationResultFuture
{
private final AggregationAccessorSlotPair[] accessors;
protected final AggregationState[] states;
private final AggregationStateFactory[] accessAggSpecs;
public AggSvcGroupAllAccessOnlyImpl(AggregationAccessorSlotPair[] accessors, AggregationState[] states, AggregationStateFactory[] accessAggSpecs) {
this.accessors = accessors;
this.states = states;
this.accessAggSpecs = accessAggSpecs;
}
public void applyEnter(EventBean[] eventsPerStream, Object groupKey, ExprEvaluatorContext exprEvaluatorContext)
{
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qAggregationUngroupedApplyEnterLeave(true, 0, accessAggSpecs.length);}
for (int i = 0; i < states.length; i++) {
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qAggAccessEnterLeave(true, i, states[i], accessAggSpecs[i]);}
states[i].applyEnter(eventsPerStream, exprEvaluatorContext);
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aAggAccessEnterLeave(true, i, states[i]);}
}
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aAggregationUngroupedApplyEnterLeave(true);}
}
public void applyLeave(EventBean[] eventsPerStream, Object groupKey, ExprEvaluatorContext exprEvaluatorContext)
{
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qAggregationUngroupedApplyEnterLeave(false, 0, accessAggSpecs.length);}
for (int i = 0; i < states.length; i++) {
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qAggAccessEnterLeave(false, i, states[i], accessAggSpecs[i]);}
states[i].applyLeave(eventsPerStream, exprEvaluatorContext);
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aAggAccessEnterLeave(false, i, states[i]);}
}
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aAggregationUngroupedApplyEnterLeave(false);}
}
public void setCurrentAccess(Object groupKey, int agentInstanceId)
{
// no implementation required
}
public Object getValue(int column, int agentInstanceId)
{
AggregationAccessorSlotPair pair = accessors[column];
return pair.getAccessor().getValue(states[pair.getSlot()]);
}
public EventBean getEventBean(int column, ExprEvaluatorContext context) {
AggregationAccessorSlotPair pair = accessors[column];
return pair.getAccessor().getEnumerableEvent(states[pair.getSlot()]);
}
public Collection<EventBean> getCollection(int column, ExprEvaluatorContext context)
{
AggregationAccessorSlotPair pair = accessors[column];
return pair.getAccessor().getEnumerableEvents(states[pair.getSlot()]);
}
public void clearResults(ExprEvaluatorContext exprEvaluatorContext)
{
for (AggregationState state : states) {
state.clear();
}
}
public void setRemovedCallback(AggregationRowRemovedCallback callback) {
// not applicable
}
public void accept(AggregationServiceVisitor visitor) {
visitor.visitAggregations(1, states);
}
public void acceptGroupDetail(AggregationServiceVisitorWGroupDetail visitor) {
}
public boolean isGrouped() {
return false;
}
public Object getGroupKey(int agentInstanceId) {
return null;
}
public Collection<Object> getGroupKeys(ExprEvaluatorContext exprEvaluatorContext) {
return null;
}
}