org.apache.lucene.index

Class SingletonSortedSetDocValues

java.lang.Object

org.apache.lucene.index.SortedSetDocValues

org.apache.lucene.index.SingletonSortedSetDocValues

public class SingletonSortedSetDocValues
extends SortedSetDocValues

Exposes multi-valued view over a single-valued instance.

This can be used if you want to have one multi-valued implementation against e.g. FieldCache.getDocTermOrds that also works for single-valued fields.

Field Summary

Fields inherited from class org.apache.lucene.index.SortedSetDocValues

EMPTY, NO_MORE_ORDS

Constructor Summary

Constructors

Constructor and Description
SingletonSortedSetDocValues(SortedDocValues in) Creates a multi-valued view over the provided SortedDocValues

Method Summary

Methods

Modifier and Type	Method and Description
long	getValueCount() Returns the number of unique values.
void	lookupOrd(long ord, BytesRef result) Retrieves the value for the specified ordinal.
long	lookupTerm(BytesRef key) If key exists, returns its ordinal, else returns -insertionPoint-1, like Arrays.binarySearch.
long	nextOrd() Returns the next ordinal for the current document (previously set by SortedSetDocValues.setDocument(int).
void	setDocument(int docID) Sets iteration to the specified docID

Methods inherited from class java.lang.Object

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

Constructor Detail

SingletonSortedSetDocValues

public SingletonSortedSetDocValues(SortedDocValues in)

Creates a multi-valued view over the provided SortedDocValues

Method Detail

nextOrd

public long nextOrd()

Description copied from class: SortedSetDocValues

Returns the next ordinal for the current document (previously set by SortedSetDocValues.setDocument(int).

Specified by:

nextOrd in class SortedSetDocValues

Returns:

next ordinal for the document, or SortedSetDocValues.NO_MORE_ORDS. ordinals are dense, start at 0, then increment by 1 for the next value in sorted order.

setDocument

public void setDocument(int docID)

Description copied from class: SortedSetDocValues

Sets iteration to the specified docID

Specified by:

setDocument in class SortedSetDocValues

Parameters:

docID - document ID

lookupOrd

public void lookupOrd(long ord,
             BytesRef result)

Description copied from class: SortedSetDocValues

Retrieves the value for the specified ordinal.

Specified by:

lookupOrd in class SortedSetDocValues

Parameters:

ord - ordinal to lookup

result - will be populated with the ordinal's value

See Also:

SortedSetDocValues.nextOrd()

getValueCount

public long getValueCount()

Description copied from class: SortedSetDocValues

Returns the number of unique values.

Specified by:

getValueCount in class SortedSetDocValues

Returns:

number of unique values in this SortedDocValues. This is also equivalent to one plus the maximum ordinal.

lookupTerm

public long lookupTerm(BytesRef key)

Description copied from class: SortedSetDocValues

If key exists, returns its ordinal, else returns -insertionPoint-1, like Arrays.binarySearch.

Overrides:

lookupTerm in class SortedSetDocValues

Parameters:

key - Key to look up