org.apache.lucene.index

Class PerThreadPKLookup

java.lang.Object

org.apache.lucene.index.PerThreadPKLookup

public class PerThreadPKLookup
extends Object

Utility class to do efficient primary-key (only 1 doc contains the given term) lookups by segment, re-using the enums. This class is not thread safe, so it is the caller's job to create and use one instance of this per thread. Do not use this if a term may appear in more than one document! It will only return the first one it finds.

Field Summary

Fields

Modifier and Type	Field and Description
protected int[]	docBases
protected boolean	hasDeletions
protected Bits[]	liveDocs
protected int	numSegs
protected PostingsEnum[]	postingsEnums
protected TermsEnum[]	termsEnums

Constructor Summary

Constructors

Constructor and Description
PerThreadPKLookup(IndexReader r, String idFieldName)

Method Summary

Modifier and Type	Method and Description
int	lookup(BytesRef id) Returns docID if found, else -1.

Methods inherited from class java.lang.Object

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

Field Detail

termsEnums

protected final TermsEnum[] termsEnums

postingsEnums

protected final PostingsEnum[] postingsEnums

liveDocs

protected final Bits[] liveDocs

docBases

protected final int[] docBases

numSegs

protected final int numSegs

hasDeletions

protected final boolean hasDeletions

Constructor Detail

PerThreadPKLookup

public PerThreadPKLookup(IndexReader r,
                         String idFieldName)
                  throws IOException

Throws:

IOException

Method Detail

lookup

public int lookup(BytesRef id)
           throws IOException

Returns docID if found, else -1.

Throws:

IOException