Abstract the type of the aggregation result
Protected constructorConstruct an AbstractComparableAggregator that will aggregate Java-Comparable values extracted from the cache entries.
the server-side EntryAggregator implementation type identifier
the extractor that provides values to aggregate or the name of the method that could be invoked via Java reflection and that returns values to aggregate; this parameter can also be a dot-delimited sequence of method names which would result in an aggregator based on the ChainedExtractor that is based on an array of corresponding UniversalExtractor objects
Protected @classServer-side EntryAggregator implementation type identifier.
Protected Optional extractorThe ValueExtractor to apply when aggregating results.
Returns a CompositeAggregator comprised of this and the provided aggregator.
a CompositeAggregator comprised of this and the provided aggregator
the next aggregator
Abstract aggregator that processes values extracted from a set of entries in a Map, with knowledge of how to compare those values. There are two way to use the AbstractComparableAggregator:
- All the extracted objects must implement the Java Comparable interface, or
- The AbstractComparableAggregator has to be provided with a
Comparator object.
This Comparator must exist on the server in order
to be usable.
If there are no entries to aggregate, the returned result will be `null`.