Package org.apache.lucene.search

Class NamedMatches

java.lang.Object

org.apache.lucene.search.NamedMatches

All Implemented Interfaces:

Iterable<String>, Matches

public class NamedMatches
extends Object
implements Matches

Utility class to help extract the set of sub queries that have matched from a larger query.

Individual subqueries may be wrapped using wrapQuery(String, Query), and the matching queries for a particular document can then be pulled from the parent Query's Matches object by calling findNamedMatches(Matches)

Constructor Summary

Constructors

Constructor	Description
NamedMatches(String name, Matches in)	Wraps a Matches object and associates a name with it

Method Summary

Modifier and Type	Method	Description
static List<NamedMatches>	findNamedMatches(Matches matches)	Finds all NamedMatches in a Matches tree
MatchesIterator	getMatches(String field)	Returns a MatchesIterator over the matches for a single field, or null if there are no matches in that field.
String	getName()	Returns the name of this Matches
Collection<Matches>	getSubMatches()	Returns a collection of Matches that make up this instance; if it is not a composite, then this returns an empty list
Iterator<String>	iterator()
static Query	wrapQuery(String name, Query in)	Wrap a Query so that it associates a name with its Matches

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

NamedMatches

public NamedMatches(String name,
 Matches in)

Wraps a Matches object and associates a name with it

Method Details

getName

public String getName()

Returns the name of this Matches

getMatches

public MatchesIterator getMatches(String field)
                           throws IOException

Description copied from interface: Matches

Returns a MatchesIterator over the matches for a single field, or null if there are no matches in that field.

Specified by:

getMatches in interface Matches

Throws:

IOException

getSubMatches

public Collection<Matches> getSubMatches()

Description copied from interface: Matches

Returns a collection of Matches that make up this instance; if it is not a composite, then this returns an empty list

Specified by:

getSubMatches in interface Matches

iterator

public Iterator<String> iterator()

Specified by:

iterator in interface Iterable<String>

wrapQuery

public static Query wrapQuery(String name,
 Query in)

Wrap a Query so that it associates a name with its Matches

findNamedMatches

public static List<NamedMatches> findNamedMatches(Matches matches)

Finds all NamedMatches in a Matches tree