package com.espertech.esper.epl.enummethod.eval;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.ExprEvaluator;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import java.util.ArrayDeque;
import java.util.Collection;
import java.util.Deque;
public class EnumEvalSelectFrom extends EnumEvalBase implements EnumEval {
public EnumEvalSelectFrom(ExprEvaluator innerExpression, int streamCountIncoming) {
super(innerExpression, streamCountIncoming);
}
public Object evaluateEnumMethod(Collection target, boolean isNewData, ExprEvaluatorContext context) {
if (target.isEmpty()) {
return target;
}
Collection<EventBean> beans = (Collection<EventBean>) target;
Deque queue = new ArrayDeque();
for (EventBean next : beans) {
eventsLambda[streamNumLambda] = next;
Object item = innerExpression.evaluate(eventsLambda, isNewData, context);
if (item != null) {
queue.add(item);
}
}
return queue;
}
}