/*
* *************************************************************************************
* 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.enummethod.eval;
import com.espertech.esper.client.EventType;
import com.espertech.esper.client.util.ExpressionReturnType;
import com.espertech.esper.epl.core.MethodResolutionService;
import com.espertech.esper.epl.core.StreamTypeService;
import com.espertech.esper.epl.enummethod.dot.EnumMethodEnum;
import com.espertech.esper.epl.enummethod.dot.ExprDotEvalEnumMethodBase;
import com.espertech.esper.epl.enummethod.dot.ExprDotEvalParam;
import com.espertech.esper.epl.enummethod.dot.ExprDotEvalParamLambda;
import com.espertech.esper.epl.expression.ExprDotNodeUtility;
import com.espertech.esper.event.EventAdapterService;
import com.espertech.esper.event.arr.ObjectArrayEventType;
import java.util.List;
public class ExprDotEvalDistinct extends ExprDotEvalEnumMethodBase {
public EventType[] getAddStreamTypes(String enumMethodUsedName, List<String> goesToNames, EventType inputEventType, Class collectionComponentType, List<ExprDotEvalParam> bodiesAndParameters) {
return ExprDotNodeUtility.getSingleLambdaParamEventType(enumMethodUsedName, goesToNames, inputEventType, collectionComponentType);
}
public EnumEval getEnumEval(MethodResolutionService methodResolutionService, EventAdapterService eventAdapterService, StreamTypeService streamTypeService, String statementId, String enumMethodUsedName, List<ExprDotEvalParam> bodiesAndParameters, EventType inputEventType, Class collectionComponentType, int numStreamsIncoming, boolean disablePropertyExpressionEventCollCache) {
if (bodiesAndParameters.isEmpty()) {
super.setTypeInfo(ExpressionReturnType.collectionOfSingleValue(collectionComponentType));
return new EnumEvalDistinctScalar(numStreamsIncoming);
}
ExprDotEvalParamLambda first = (ExprDotEvalParamLambda) bodiesAndParameters.get(0);
if (inputEventType == null) {
super.setTypeInfo(ExpressionReturnType.collectionOfSingleValue(collectionComponentType));
return new EnumEvalDistinctScalarLambda(first.getBodyEvaluator(), first.getStreamCountIncoming(),
(ObjectArrayEventType) first.getGoesToTypes()[0]);
}
super.setTypeInfo(ExpressionReturnType.collectionOfEvents(inputEventType));
return new EnumEvalDistinctEvents(first.getBodyEvaluator(), first.getStreamCountIncoming());
}
}