Module org.apache.lucene.queries
Class OffsetIntervalsSource
- java.lang.Object
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- org.apache.lucene.queries.intervals.IntervalsSource
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- org.apache.lucene.queries.intervals.OffsetIntervalsSource
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class OffsetIntervalsSource extends IntervalsSource
Tracks a reference intervals source, and produces a pseudo-interval that appears either one position before or one position after each interval from the reference
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Nested Class Summary
Nested Classes Modifier and Type Class Description private static class
OffsetIntervalsSource.OffsetIntervalIterator
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Field Summary
Fields Modifier and Type Field Description private boolean
before
private IntervalsSource
in
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Constructor Summary
Constructors Constructor Description OffsetIntervalsSource(IntervalsSource in, boolean before)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(java.lang.Object o)
int
hashCode()
IntervalIterator
intervals(java.lang.String field, LeafReaderContext ctx)
Create anIntervalIterator
exposing the minimum intervals defined by thisIntervalsSource
IntervalMatchesIterator
matches(java.lang.String field, LeafReaderContext ctx, int doc)
Return aMatchesIterator
over the intervals defined by thisIntervalsSource
for a given document and fieldint
minExtent()
Return the minimum possible width of an interval returned by this sourceprivate IntervalIterator
offset(IntervalIterator it)
java.util.Collection<IntervalsSource>
pullUpDisjunctions()
Expert: return the set of disjunctions that make up this IntervalsSourcejava.lang.String
toString()
void
visit(java.lang.String field, QueryVisitor visitor)
Expert: visit the tree of sources
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Field Detail
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in
private final IntervalsSource in
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before
private final boolean before
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Constructor Detail
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OffsetIntervalsSource
OffsetIntervalsSource(IntervalsSource in, boolean before)
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Method Detail
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intervals
public IntervalIterator intervals(java.lang.String field, LeafReaderContext ctx) throws java.io.IOException
Description copied from class:IntervalsSource
Create anIntervalIterator
exposing the minimum intervals defined by thisIntervalsSource
Returns
null
if no intervals for this field exist in this segment- Specified by:
intervals
in classIntervalsSource
- Parameters:
field
- the field to read positions fromctx
- the context for which to return the iterator- Throws:
java.io.IOException
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offset
private IntervalIterator offset(IntervalIterator it)
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matches
public IntervalMatchesIterator matches(java.lang.String field, LeafReaderContext ctx, int doc) throws java.io.IOException
Description copied from class:IntervalsSource
Return aMatchesIterator
over the intervals defined by thisIntervalsSource
for a given document and fieldReturns
null
if no intervals exist in the given document and field- Specified by:
matches
in classIntervalsSource
- Parameters:
field
- the field to read positions fromctx
- the document's contextdoc
- the document to return matches for- Throws:
java.io.IOException
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visit
public void visit(java.lang.String field, QueryVisitor visitor)
Description copied from class:IntervalsSource
Expert: visit the tree of sources- Specified by:
visit
in classIntervalsSource
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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 classIntervalsSource
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pullUpDisjunctions
public java.util.Collection<IntervalsSource> pullUpDisjunctions()
Description copied from class:IntervalsSource
Expert: return the set of disjunctions that make up this IntervalsSourceMost implementations can return
Collections.singleton(this)
- Specified by:
pullUpDisjunctions
in classIntervalsSource
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equals
public boolean equals(java.lang.Object o)
- Specified by:
equals
in classIntervalsSource
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hashCode
public int hashCode()
- Specified by:
hashCode
in classIntervalsSource
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toString
public java.lang.String toString()
- Specified by:
toString
in classIntervalsSource
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