org.apache.lucene.index

Class NumericDocValues

java.lang.Object

org.apache.lucene.search.DocIdSetIterator

org.apache.lucene.index.NumericDocValues

Direct Known Subclasses:

FilterNumericDocValues

public abstract class NumericDocValues
extends DocIdSetIterator

A per-document numeric value.

Field Summary

Fields inherited from class org.apache.lucene.search.DocIdSetIterator

NO_MORE_DOCS

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NumericDocValues() Sole constructor.

Method Summary

Modifier and Type	Method and Description
abstract boolean	advanceExact(int target) Advance the iterator to exactly target and return whether target has a value.
abstract long	longValue() Returns the numeric value for the current document ID.

Methods inherited from class org.apache.lucene.search.DocIdSetIterator

advance, all, cost, docID, empty, nextDoc, range, slowAdvance

Methods inherited from class java.lang.Object

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

Constructor Detail

NumericDocValues

protected NumericDocValues()

Sole constructor. (For invocation by subclass constructors, typically implicit.)

Method Detail

longValue

public abstract long longValue()
                        throws IOException

Returns the numeric value for the current document ID. It is illegal to call this method after advanceExact(int) returned false.

Returns:

numeric value

Throws:

IOException

advanceExact

public abstract boolean advanceExact(int target)
                              throws IOException

Advance the iterator to exactly target and return whether target has a value. target must be greater than or equal to the current doc ID and must be a valid doc ID, ie. ≥ 0 and < maxDoc. After this method returns, DocIdSetIterator.docID() returns target.

Throws:

IOException