Package org.apache.solr.spelling.suggest.fst

Class FSTLookupFactory

java.lang.Object

org.apache.solr.spelling.suggest.LookupFactory

org.apache.solr.spelling.suggest.fst.FSTLookupFactory

public class FSTLookupFactory
extends LookupFactory

Factory for FSTCompletionLookup

Field Summary

Fields

Modifier and Type	Field	Description
static String	EXACT_MATCH_FIRST	If true, exact suggestions are returned first, even if they are prefixes of other strings in the automaton (possibly with larger weights).
static String	WEIGHT_BUCKETS	The number of separate buckets for weights (discretization).

Fields inherited from class org.apache.solr.spelling.suggest.LookupFactory

DEFAULT_FILE_BASED_DICT

Constructor Summary

Constructors

Constructor	Description
FSTLookupFactory()

Method Summary

Modifier and Type	Method	Description
org.apache.lucene.search.suggest.Lookup	create(org.apache.solr.common.util.NamedList<?> params, SolrCore core)	Create a Lookup using config options in params and current core
String	storeFileName()	Returns the filename in which the in-memory data structure is stored NOTE: not all Lookup implementations store in-memory data structures

Methods inherited from class org.apache.solr.spelling.suggest.LookupFactory

getTempDir

Methods inherited from class java.lang.Object

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

Field Detail

WEIGHT_BUCKETS

public static final String WEIGHT_BUCKETS

The number of separate buckets for weights (discretization). The more buckets, the more fine-grained term weights (priorities) can be assigned. The speed of lookup will not decrease for prefixes which have highly-weighted completions (because these are filled-in first), but will decrease significantly for low-weighted terms (but these should be infrequent, so it is all right).

The number of buckets must be within [1, 255] range.

See Also:

Constant Field Values

EXACT_MATCH_FIRST

public static final String EXACT_MATCH_FIRST

If true, exact suggestions are returned first, even if they are prefixes of other strings in the automaton (possibly with larger weights).

See Also:

Constant Field Values

Constructor Detail

FSTLookupFactory

public FSTLookupFactory()

Method Detail

create

public org.apache.lucene.search.suggest.Lookup create(org.apache.solr.common.util.NamedList<?> params,
                                                      SolrCore core)

Description copied from class: LookupFactory

Create a Lookup using config options in params and current core

Specified by:

create in class LookupFactory

storeFileName

public String storeFileName()

Description copied from class: LookupFactory

Returns the filename in which the in-memory data structure is stored NOTE: not all Lookup implementations store in-memory data structures

Specified by:

storeFileName in class LookupFactory