package com.espertech.esper.epl.enummethod.dot;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventPropertyGetter;
import com.espertech.esper.client.EventType;
import com.espertech.esper.core.ExpressionResultCacheEntry;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import com.espertech.esper.epl.expression.ExprEvaluatorEnumeration;
import com.espertech.esper.epl.expression.ExprValidationException;
import java.util.Arrays;
import java.util.Collection;
public class PropertyExprEvaluatorEventCollection implements ExprEvaluatorEnumeration {
private final String propertyNameCache;
private final int streamId;
private final EventType fragmentType;
private final EventPropertyGetter getter;
public PropertyExprEvaluatorEventCollection(String propertyName, int streamId, EventType fragmentType, EventPropertyGetter getter) {
this.streamId = streamId;
this.propertyNameCache = Integer.toString(streamId) + "_" + propertyName;
this.fragmentType = fragmentType;
this.getter = getter;
}
public Collection<EventBean> evaluateGetROCollectionEvents(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
EventBean eventInQuestion = eventsPerStream[streamId];
ExpressionResultCacheEntry<EventBean, Collection<EventBean>> cacheEntry = context.getExpressionResultCacheService().getPropertyColl(propertyNameCache, eventInQuestion);
if (cacheEntry != null) {
return cacheEntry.getResult();
}
EventBean[] events = (EventBean[]) getter.getFragment(eventInQuestion);
Collection<EventBean> coll = events == null ? null : Arrays.asList(events);
context.getExpressionResultCacheService().savePropertyColl(propertyNameCache, eventInQuestion, coll);
if (coll == null) {
return null;
}
return coll;
}
public Collection evaluateGetROCollectionScalar(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
return null;
}
public EventType getEventTypeCollection() {
return fragmentType;
}
public Class getComponentTypeCollection() throws ExprValidationException {
return null;
}
public EventType getEventTypeSingle() throws ExprValidationException {
return null;
}
public EventBean evaluateGetEventBean(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
return null;
}
}