/**************************************************************************************
* 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.expression;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventType;
import com.espertech.esper.epl.spec.StatementSpecRaw;
import com.espertech.esper.event.EventAdapterService;
import com.espertech.esper.type.RelationalOpEnum;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.Collection;
import java.util.Map;
/**
* Represents a subselect in an expression tree.
*/
public class ExprSubselectAllSomeAnyNode extends ExprSubselectNode
{
private static final Log log = LogFactory.getLog(ExprSubselectInNode.class);
private final boolean isNot;
private final boolean isAll;
private final RelationalOpEnum relationalOp;
private transient SubselectEvalStrategy evalStrategy;
private static final long serialVersionUID = -3884694910286266280L;
/**
* Ctor.
* @param statementSpec is the lookup statement spec from the parser, unvalidated
* @param not when NOT
* @param all when ALL, false for ANY
* @param relationalOpEnum operator
*/
public ExprSubselectAllSomeAnyNode(StatementSpecRaw statementSpec, boolean not, boolean all, RelationalOpEnum relationalOpEnum)
{
super(statementSpec);
isNot = not;
isAll = all;
this.relationalOp = relationalOpEnum;
}
public Map<String, Object> getEventType() {
return null;
}
/**
* Returns true for not.
* @return not indicator
*/
public boolean isNot()
{
return isNot;
}
/**
* Returns true for all.
* @return all indicator
*/
public boolean isAll()
{
return isAll;
}
/**
* Returns relational op.
* @return op
*/
public RelationalOpEnum getRelationalOp()
{
return relationalOp;
}
public Class getType()
{
return Boolean.class;
}
public void validateSubquery(ExprValidationContext validationContext) throws ExprValidationException
{
evalStrategy = SubselectEvalStrategyFactory.createStrategy(this, isNot, isAll, !isAll, relationalOp);
}
public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, Collection<EventBean> matchingEvents, ExprEvaluatorContext exprEvaluatorContext)
{
return evalStrategy.evaluate(eventsPerStream, isNewData, matchingEvents, exprEvaluatorContext);
}
public Collection<EventBean> evaluateGetCollEvents(EventBean[] eventsPerStream, boolean isNewData, Collection<EventBean> matchingEvents, ExprEvaluatorContext context) {
return null;
}
public Collection evaluateGetCollScalar(EventBean[] eventsPerStream, boolean isNewData, Collection<EventBean> matchingEvents, ExprEvaluatorContext exprEvaluatorContext) {
return null;
}
public EventType getEventTypeCollection(EventAdapterService eventAdapterService) {
return null;
}
public Class getComponentTypeCollection() throws ExprValidationException {
return null;
}
public EventType getEventTypeSingle(EventAdapterService eventAdapterService, String statementId) throws ExprValidationException {
return null;
}
public EventBean evaluateGetEventBean(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
return null;
}
@Override
public boolean isAllowMultiColumnSelect() {
return false;
}
}