org.apache.lucene.index
Class Fields

java.lang.Object
  org.apache.lucene.index.Fields

Direct Known Subclasses:

FieldsProducer, FilterAtomicReader.FilterFields, MultiFields

public abstract class Fields
extends Object

Flex API for access to fields and terms

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary

static Fields[]

EMPTY_ARRAY

Constructor Summary

Fields()

Method Summary

long	getUniqueTermCount() Returns the number of terms for all fields, or -1 if this measure isn't stored by the codec.
abstract FieldsEnum	iterator() Returns an iterator that will step through all fields names.
abstract int	size() Returns the number of terms for all fields, or -1 if this measure isn't stored by the codec.
abstract Terms	terms(String field) Get the Terms for this field.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_ARRAY

public static final Fields[] EMPTY_ARRAY

Constructor Detail

Fields

public Fields()

Method Detail

iterator

public abstract FieldsEnum iterator()
                             throws IOException

Returns an iterator that will step through all fields names. This will not return null.

Throws:

IOException

terms

public abstract Terms terms(String field)
                     throws IOException

Get the Terms for this field. This will return null if the field does not exist.

Throws:

IOException

size

public abstract int size()
                  throws IOException

Returns the number of terms for all fields, or -1 if this measure isn't stored by the codec. Note that, just like other term measures, this measure does not take deleted documents into account.

Throws:

IOException

getUniqueTermCount

public long getUniqueTermCount()
                        throws IOException

Returns the number of terms for all fields, or -1 if this measure isn't stored by the codec. Note that, just like other term measures, this measure does not take deleted documents into account.

Throws:

IOException