Package org.apache.lucene.index

Class MultiDocValues

java.lang.Object

org.apache.lucene.index.MultiDocValues

public class MultiDocValues
extends Object

A wrapper for CompositeIndexReader providing access to DocValues.

NOTE: for multi readers, you'll get better performance by gathering the sub readers using IndexReader.getContext() to get the atomic leaves and then operate per-AtomicReader, instead of using this class.

NOTE: This is very costly.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MultiDocValues.MultiSortedDocValues	Implements SortedDocValues over n subs, using an OrdinalMap
static class	MultiDocValues.MultiSortedSetDocValues	Implements MultiSortedSetDocValues over n subs, using an OrdinalMap
static class	MultiDocValues.OrdinalMap	maps per-segment ordinals to/from global ordinal space

Method Summary

Modifier and Type	Method	Description
static BinaryDocValues	getBinaryValues(IndexReader r, String field)	Returns a BinaryDocValues for a reader's docvalues (potentially merging on-the-fly)
static Bits	getDocsWithField(IndexReader r, String field)	Returns a Bits for a reader's docsWithField (potentially merging on-the-fly)
static NumericDocValues	getNormValues(IndexReader r, String field)	Returns a NumericDocValues for a reader's norms (potentially merging on-the-fly).
static NumericDocValues	getNumericValues(IndexReader r, String field)	Returns a NumericDocValues for a reader's docvalues (potentially merging on-the-fly)
static SortedSetDocValues	getSortedSetValues(IndexReader r, String field)	Returns a SortedSetDocValues for a reader's docvalues (potentially doing extremely slow things).
static SortedDocValues	getSortedValues(IndexReader r, String field)	Returns a SortedDocValues for a reader's docvalues (potentially doing extremely slow things).

Methods inherited from class java.lang.Object

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

Method Details

getNormValues

public static NumericDocValues getNormValues(IndexReader r,
 String field)
                                      throws IOException

Returns a NumericDocValues for a reader's norms (potentially merging on-the-fly).

This is a slow way to access normalization values. Instead, access them per-segment with AtomicReader.getNormValues(String)

Throws:

IOException

getNumericValues

public static NumericDocValues getNumericValues(IndexReader r,
 String field)
                                         throws IOException

Returns a NumericDocValues for a reader's docvalues (potentially merging on-the-fly)

This is a slow way to access numeric values. Instead, access them per-segment with AtomicReader.getNumericDocValues(String)

Throws:

IOException

getDocsWithField

public static Bits getDocsWithField(IndexReader r,
 String field)
                             throws IOException

Returns a Bits for a reader's docsWithField (potentially merging on-the-fly)

This is a slow way to access this bitset. Instead, access them per-segment with AtomicReader.getDocsWithField(String)

Throws:

IOException

getBinaryValues

public static BinaryDocValues getBinaryValues(IndexReader r,
 String field)
                                       throws IOException

Returns a BinaryDocValues for a reader's docvalues (potentially merging on-the-fly)

This is a slow way to access binary values. Instead, access them per-segment with AtomicReader.getBinaryDocValues(String)

Throws:

IOException

getSortedValues

public static SortedDocValues getSortedValues(IndexReader r,
 String field)
                                       throws IOException

Returns a SortedDocValues for a reader's docvalues (potentially doing extremely slow things).

This is an extremely slow way to access sorted values. Instead, access them per-segment with AtomicReader.getSortedDocValues(String)

Throws:

IOException

getSortedSetValues

public static SortedSetDocValues getSortedSetValues(IndexReader r,
 String field)
                                             throws IOException

Returns a SortedSetDocValues for a reader's docvalues (potentially doing extremely slow things).

This is an extremely slow way to access sorted values. Instead, access them per-segment with AtomicReader.getSortedSetDocValues(String)

Throws:

IOException