/*
* *************************************************************************************
* 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.collection.Pair;
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.client.util.ExpressionReturnType;
import com.espertech.esper.epl.expression.ExprDotNode;
import com.espertech.esper.epl.expression.ExprEvaluatorEnumeration;
import com.espertech.esper.epl.expression.ExprValidationException;
import com.espertech.esper.event.EventAdapterService;
import com.espertech.esper.event.EventTypeUtility;
import java.util.List;
public class ExprDotEvalSetExceptUnionIntersect extends ExprDotEvalEnumMethodBase {
public EventType[] getAddStreamTypes(String enumMethodUsedName, List<String> goesToNames, EventType inputEventType, Class collectionComponentType, List<ExprDotEvalParam> bodiesAndParameters) {
return new EventType[] {};
}
public EnumEval getEnumEval(MethodResolutionService methodResolutionService, EventAdapterService eventAdapterService, StreamTypeService streamTypeService, String statementId, String enumMethodUsedName, List<ExprDotEvalParam> bodiesAndParameters, EventType inputEventType, Class collectionComponentType, int numStreamsIncoming) throws ExprValidationException {
ExprDotEvalParam first = bodiesAndParameters.get(0);
Pair<ExprEvaluatorEnumeration, ExpressionReturnType> enumSrc = ExprDotNode.getEnumerationSource(first.getBody(), streamTypeService, eventAdapterService, statementId, true);
if (inputEventType != null) {
super.setTypeInfo(ExpressionReturnType.collectionOfEvents(inputEventType));
}
else {
super.setTypeInfo(ExpressionReturnType.collectionOfSingleValue(collectionComponentType));
}
if (enumSrc.getFirst() == null) {
String message = "Enumeration method '" + enumMethodUsedName + "' requires an expression yielding an event-collection as input paramater";
throw new ExprValidationException(message);
}
EventType setType = enumSrc.getFirst().getEventTypeCollection(eventAdapterService);
if (setType != inputEventType) {
boolean isSubtype = EventTypeUtility.isTypeOrSubTypeOf(setType, inputEventType);
if (!isSubtype) {
String message = "Enumeration method '" + enumMethodUsedName + "' expects event type '" + inputEventType.getName() + "' but receives event type '" + enumSrc.getFirst().getEventTypeCollection(eventAdapterService).getName() + "'";
throw new ExprValidationException(message);
}
}
if (this.getEnumMethodEnum() == EnumMethodEnum.UNION) {
return new EnumEvalUnion(numStreamsIncoming, enumSrc.getFirst(), inputEventType == null);
}
else if (this.getEnumMethodEnum() == EnumMethodEnum.INTERSECT) {
return new EnumEvalIntersect(numStreamsIncoming, enumSrc.getFirst(), inputEventType == null);
}
else if (this.getEnumMethodEnum() == EnumMethodEnum.EXCEPT) {
return new EnumEvalExcept(numStreamsIncoming, enumSrc.getFirst(), inputEventType == null);
}
else {
throw new IllegalArgumentException("Invalid enumeration method for this factory: " + this.getEnumMethodEnum());
}
}
}