/*
* *************************************************************************************
* 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.script;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventType;
import com.espertech.esper.epl.enummethod.dot.ArrayWrappingCollection;
import com.espertech.esper.epl.expression.ExprEvaluator;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import com.espertech.esper.epl.expression.ExprEvaluatorEnumeration;
import com.espertech.esper.epl.expression.ExprValidationException;
import com.espertech.esper.event.EventAdapterService;
import com.espertech.esper.util.JavaClassHelper;
import com.espertech.esper.util.SimpleNumberCoercer;
import com.espertech.esper.util.SimpleNumberCoercerFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.Collection;
public abstract class ExprNodeScriptEvalBase implements ExprEvaluator, ExprEvaluatorEnumeration {
private static final Log log = LogFactory.getLog(ExprNodeScriptEvalBase.class);
protected final String scriptName;
protected final String statementName;
protected final String[] names;
protected final ExprEvaluator[] parameters;
protected final Class returnType;
protected final SimpleNumberCoercer coercer;
public ExprNodeScriptEvalBase(String scriptName, String statementName, String[] names, ExprEvaluator[] parameters, Class returnType) {
this.scriptName = scriptName;
this.statementName = statementName;
this.names = names;
this.parameters = parameters;
this.returnType = returnType;
if (JavaClassHelper.isNumeric(returnType)) {
coercer = SimpleNumberCoercerFactory.getCoercer(Number.class, JavaClassHelper.getBoxedType(returnType));
}
else {
coercer = null;
}
}
public Class getType() {
return returnType;
}
public EventType getEventTypeCollection(EventAdapterService eventAdapterService, String statementId) throws ExprValidationException {
return null;
}
public Collection<EventBean> evaluateGetROCollectionEvents(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
return null;
}
public Class getComponentTypeCollection() throws ExprValidationException {
if (returnType.isArray()) {
return returnType.getComponentType();
}
return null;
}
public Collection evaluateGetROCollectionScalar(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
Object result = evaluate(eventsPerStream, isNewData, context);
if (result == null) {
return null;
}
return new ArrayWrappingCollection(result);
}
public EventType getEventTypeSingle(EventAdapterService eventAdapterService, String statementId) throws ExprValidationException {
return null;
}
public EventBean evaluateGetEventBean(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
return null;
}
}