Module org.apache.lucene.queries

Package org.apache.lucene.queries.intervals

Class DisjunctionIntervalsSource

java.lang.Object

org.apache.lucene.queries.intervals.IntervalsSource

org.apache.lucene.queries.intervals.DisjunctionIntervalsSource

class DisjunctionIntervalsSource
extends IntervalsSource

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	DisjunctionIntervalsSource.DisjunctionIntervalIterator
private static class	DisjunctionIntervalsSource.DisjunctionMatchesIterator

Field Summary

Fields

Modifier and Type	Field	Description
private static final IntervalIterator	EMPTY
private static final IntervalIterator	EXHAUSTED
(package private) final boolean	pullUpDisjunctions
(package private) final Collection<IntervalsSource>	subSources

Constructor Summary

Constructors

Modifier	Constructor	Description
private	DisjunctionIntervalsSource(Collection<IntervalsSource> subSources, boolean pullUpDisjunctions)

Method Summary

Modifier and Type	Method	Description
(package private) static IntervalsSource	create(Collection<IntervalsSource> subSources, boolean pullUpDisjunctions)
boolean	equals(Object o)
int	hashCode()
IntervalIterator	intervals(String field, LeafReaderContext ctx)	Create an IntervalIterator exposing the minimum intervals defined by this IntervalsSource
IntervalMatchesIterator	matches(String field, LeafReaderContext ctx, int doc)	Return a MatchesIterator over the intervals defined by this IntervalsSource for a given document and field
int	minExtent()	Return the minimum possible width of an interval returned by this source
Collection<IntervalsSource>	pullUpDisjunctions()	Expert: return the set of disjunctions that make up this IntervalsSource
private static Collection<IntervalsSource>	simplify(Collection<IntervalsSource> sources)
String	toString()
void	visit(String field, QueryVisitor visitor)	Expert: visit the tree of sources

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

subSources

final Collection<IntervalsSource> subSources

pullUpDisjunctions

final boolean pullUpDisjunctions

EMPTY

private static final IntervalIterator EMPTY

EXHAUSTED

private static final IntervalIterator EXHAUSTED

Constructor Details

DisjunctionIntervalsSource

private DisjunctionIntervalsSource(Collection<IntervalsSource> subSources,
 boolean pullUpDisjunctions)

Method Details

create

static IntervalsSource create(Collection<IntervalsSource> subSources,
 boolean pullUpDisjunctions)

simplify

private static Collection<IntervalsSource> simplify(Collection<IntervalsSource> sources)

intervals

public IntervalIterator intervals(String field,
 LeafReaderContext ctx)
                           throws IOException

Description copied from class: IntervalsSource

Create an IntervalIterator exposing the minimum intervals defined by this IntervalsSource

Returns null if no intervals for this field exist in this segment

Specified by:

intervals in class IntervalsSource

Parameters:

field - the field to read positions from

ctx - the context for which to return the iterator

Throws:

IOException

matches

public IntervalMatchesIterator matches(String field,
 LeafReaderContext ctx,
 int doc)
                                throws IOException

Description copied from class: IntervalsSource

Return a MatchesIterator over the intervals defined by this IntervalsSource for a given document and field

Returns null if no intervals exist in the given document and field

Specified by:

matches in class IntervalsSource

Parameters:

field - the field to read positions from

ctx - the document's context

doc - the document to return matches for

Throws:

IOException

equals

public boolean equals(Object o)

Specified by:

equals in class IntervalsSource

hashCode

public int hashCode()

Specified by:

hashCode in class IntervalsSource

toString

public String toString()

Specified by:

toString in class IntervalsSource

visit

public void visit(String field,
 QueryVisitor visitor)

Description copied from class: IntervalsSource

Expert: visit the tree of sources

Specified by:

visit in class IntervalsSource

minExtent

public int minExtent()

Description copied from class: IntervalsSource

Return the minimum possible width of an interval returned by this source

Specified by:

minExtent in class IntervalsSource

pullUpDisjunctions

public Collection<IntervalsSource> pullUpDisjunctions()

Description copied from class: IntervalsSource

Expert: return the set of disjunctions that make up this IntervalsSource

Most implementations can return Collections.singleton(this)

Specified by:

pullUpDisjunctions in class IntervalsSource