package com.espertech.esper.epl.expression;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventPropertyGetterIndexed;
import com.espertech.esper.client.EventPropertyGetterMapped;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class ExprDotEvalPropertyExprIndexed extends ExprDotEvalPropertyExprBase {
private static final Log log = LogFactory.getLog(ExprDotEvalPropertyExprIndexed.class);
private final EventPropertyGetterIndexed indexedGetter;
public ExprDotEvalPropertyExprIndexed(String statementName, String propertyName, int streamNum, ExprEvaluator exprEvaluator, Class propertyType, EventPropertyGetterIndexed indexedGetter) {
super(statementName, propertyName, streamNum, exprEvaluator, propertyType);
this.indexedGetter = indexedGetter;
}
public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
EventBean eventInQuestion = eventsPerStream[super.streamNum];
if (eventInQuestion == null) {
return null;
}
Object index = exprEvaluator.evaluate(eventsPerStream, isNewData, context);
if (index == null || (!(index instanceof Integer))) {
log.warn(super.getWarningText("integer", index));
return null;
}
return indexedGetter.get(eventInQuestion, (Integer) index);
}
}