You could wrap a collector wrapper (have a look at FilterCollector maybe) that throws a CollectionTerminatedException whenever more than X hits have been collected in total. It will likely stop in the middle of the first segment, and then before collecting further segments.
FYI you can not only throw a CollectionTerminatedException from the collect method, but also from the getLeafCollector method, which allows to skip a segment entirely before even starting to find a match. We have such a collector in Elasticsearch, feel free to copy-paste it and adapt to your needs if you want. It is licensed under ASL2: https://github.com/elastic/elasticsearch/blob/36a5cf8f35e5cbaa1ff857b5a5db8c02edc1a187/core/src/main/java/org/elasticsearch/search/query/EarlyTerminatingCollector.java Le jeu. 17 août 2017 à 21:46, Tod Olson <t...@uchicago.edu> a écrit : > Hi everyone, > > I'm modifying an existing application, which uses a Lucene SimpleCollector > to return document ids and some other fields from a search. For various > reasons, we now want to place an upper bound on the number of documents > actually collected. > > Is there a reasonable way to put a limit on the results returned by a > SimpleCollector? Or do I need to change Collectors? > > Based on the docs, I could keep a counter and raise a > CollectionTerminatedException after N documents, but then the search moves > on to the next leaf. I'd like to have the entire search terminate and > return the collected documents. > > Any assistance for a Lucene novice is greatly appreciated! > > -Tod > > > Tod Olson <t...@uchicago.edu<mailto:t...@uchicago.edu>> > Systems Librarian > Interim Director for Integrated Library Systems > University of Chicago Library > >
