org.apache.lucene.search

Class CheckHits.MatchesAsserter

java.lang.Object

org.apache.lucene.search.SimpleCollector

org.apache.lucene.search.CheckHits.MatchesAsserter

All Implemented Interfaces:

Collector, LeafCollector

Enclosing class:

CheckHits

public static class CheckHits.MatchesAsserter
extends SimpleCollector

Asserts that the Matches from a query is non-null whenever the document its created for is a hit.

Also checks that the previous non-matching document has a null Matches

Constructor Summary

Constructors

Constructor and Description
MatchesAsserter(Query query, IndexSearcher searcher)

Method Summary

Modifier and Type	Method and Description
void	collect(int doc) Called once for every document matching a query, with the unbased document number.
protected void	doSetNextReader(LeafReaderContext context) This method is called before collecting context.
boolean	needsScores() Indicates if document scores are needed by this collector.

Methods inherited from class org.apache.lucene.search.SimpleCollector

getLeafCollector, setScorer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MatchesAsserter

public MatchesAsserter(Query query,
                       IndexSearcher searcher)
                throws java.io.IOException

Throws:

java.io.IOException

Method Detail

doSetNextReader

protected void doSetNextReader(LeafReaderContext context)
                        throws java.io.IOException

Description copied from class: SimpleCollector

This method is called before collecting context.

Overrides:

doSetNextReader in class SimpleCollector

Throws:

java.io.IOException

collect

public void collect(int doc)
             throws java.io.IOException

Description copied from interface: LeafCollector

Called once for every document matching a query, with the unbased document number.

Note: The collection of the current segment can be terminated by throwing a CollectionTerminatedException. In this case, the last docs of the current LeafReaderContext will be skipped and IndexSearcher will swallow the exception and continue collection with the next leaf.

Note: This is called in an inner search loop. For good search performance, implementations of this method should not call IndexSearcher.doc(int) or IndexReader.document(int) on every hit. Doing so can slow searches by an order of magnitude or more.

Specified by:

collect in interface LeafCollector

Specified by:

collect in class SimpleCollector

Throws:

java.io.IOException

needsScores

public boolean needsScores()

Description copied from interface: Collector

Indicates if document scores are needed by this collector.

Returns:

true if scores are needed.