/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* 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.filter;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.metrics.instrumentation.InstrumentationHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collection;
import java.util.Map;
import java.util.SortedMap;
import java.util.concurrent.locks.ReadWriteLock;
/**
* Index for filter parameter constants for the range operators (range open/closed/half).
* The implementation is based on the SortedMap implementation of TreeMap and stores only expression
* parameter values of type DoubleRange.
*/
public final class FilterParamIndexDoubleRange extends FilterParamIndexDoubleRangeBase {
public FilterParamIndexDoubleRange(FilterSpecLookupable lookupable, ReadWriteLock readWriteLock, FilterOperator filterOperator) {
super(lookupable, readWriteLock, filterOperator);
if (!(filterOperator.isRangeOperator())) {
throw new IllegalArgumentException("Invalid filter operator " + filterOperator);
}
}
public final void matchEvent(EventBean theEvent, Collection<FilterHandle> matches) {
Object objAttributeValue = lookupable.getGetter().get(theEvent);
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qFilterReverseIndex(this, objAttributeValue);
}
if (objAttributeValue == null) {
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aFilterReverseIndex(false);
}
return;
}
double attributeValue = ((Number) objAttributeValue).doubleValue();
DoubleRange rangeStart = new DoubleRange(attributeValue - largestRangeValueDouble, attributeValue);
DoubleRange rangeEnd = new DoubleRange(attributeValue, Double.MAX_VALUE);
SortedMap<DoubleRange, EventEvaluator> subMap = ranges.subMap(rangeStart, rangeEnd);
// For not including either endpoint
// A bit awkward to duplicate the loop code, however better than checking the boolean many times over
// This may be a bit of an early performance optimization - the optimizer after all may do this better
if (this.getFilterOperator() == FilterOperator.RANGE_OPEN) {
// include neither endpoint
for (Map.Entry<DoubleRange, EventEvaluator> entry : subMap.entrySet()) {
if ((attributeValue > entry.getKey().getMin()) &&
(attributeValue < entry.getKey().getMax())) {
entry.getValue().matchEvent(theEvent, matches);
}
}
} else if (this.getFilterOperator() == FilterOperator.RANGE_CLOSED) {
// include all endpoints
for (Map.Entry<DoubleRange, EventEvaluator> entry : subMap.entrySet()) {
if ((attributeValue >= entry.getKey().getMin()) &&
(attributeValue <= entry.getKey().getMax())) {
entry.getValue().matchEvent(theEvent, matches);
}
}
} else if (this.getFilterOperator() == FilterOperator.RANGE_HALF_CLOSED) {
// include high endpoint not low endpoint
for (Map.Entry<DoubleRange, EventEvaluator> entry : subMap.entrySet()) {
if ((attributeValue > entry.getKey().getMin()) &&
(attributeValue <= entry.getKey().getMax())) {
entry.getValue().matchEvent(theEvent, matches);
}
}
} else if (this.getFilterOperator() == FilterOperator.RANGE_HALF_OPEN) {
// include low endpoint not high endpoint
for (Map.Entry<DoubleRange, EventEvaluator> entry : subMap.entrySet()) {
if ((attributeValue >= entry.getKey().getMin()) &&
(attributeValue < entry.getKey().getMax())) {
entry.getValue().matchEvent(theEvent, matches);
}
}
} else {
throw new IllegalStateException("Invalid filter operator " + this.getFilterOperator());
}
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aFilterReverseIndex(null);
}
}
private static final Logger log = LoggerFactory.getLogger(FilterParamIndexDoubleRange.class);
}