Package org.apache.lucene.search
Class PhraseWildcardQuery.SegmentTermsSizeComparator
- java.lang.Object
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- org.apache.lucene.search.PhraseWildcardQuery.SegmentTermsSizeComparator
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- All Implemented Interfaces:
Comparator<LeafReaderContext>
- Enclosing class:
- PhraseWildcardQuery
protected class PhraseWildcardQuery.SegmentTermsSizeComparator extends Object implements Comparator<LeafReaderContext>
Compares segments based of the number of terms they contain.This is used to sort segments incrementally by number of terms. This way the first segment to search is the smallest, so a term has the lowest probability to match in this segment. And if the term does not match, we credit unused expansions when searching the other next segments.
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Constructor Summary
Constructors Modifier Constructor Description protected
SegmentTermsSizeComparator()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
compare(LeafReaderContext leafReaderContext1, LeafReaderContext leafReaderContext2)
protected List<LeafReaderContext>
createTermsSizeSortedCopyOf(List<LeafReaderContext> segments)
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong
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Method Detail
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compare
public int compare(LeafReaderContext leafReaderContext1, LeafReaderContext leafReaderContext2)
- Specified by:
compare
in interfaceComparator<LeafReaderContext>
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createTermsSizeSortedCopyOf
protected List<LeafReaderContext> createTermsSizeSortedCopyOf(List<LeafReaderContext> segments) throws IOException
- Throws:
IOException
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