org.apache.solr.spelling.suggest.fst
Class FuzzyLookupFactory

java.lang.Object
  org.apache.solr.spelling.suggest.LookupFactory
      org.apache.solr.spelling.suggest.fst.FuzzyLookupFactory

public class FuzzyLookupFactory
extends LookupFactory

Factory for FuzzySuggester

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

Field Summary

static String	MAX_EDITS Maximum number of edits allowed, used by LevenshteinAutomata.toAutomaton(int) in bytes or Unicode code points (if UNICODE_AWARE option is set to true).
static String	MIN_FUZZY_LENGTH Minimum length of lookup key before any edits are allowed for the suggestions in bytes or Unicode code points (if UNICODE_AWARE option is set to true).
static String	NON_FUZZY_PREFIX Length of common (non-fuzzy) prefix for the suggestions in bytes or Unicode code points (if UNICODE_AWARE option is set to true).
static String	TRANSPOSITIONS If transpositions are allowed, Fuzzy suggestions will be computed based on a primitive edit operation.
static String	UNICODE_AWARE If true, maxEdits, minFuzzyLength, transpositions and nonFuzzyPrefix will be measured in Unicode code points (actual letters) instead of bytes.

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

DEFAULT_FILE_BASED_DICT

Constructor Summary

FuzzyLookupFactory()

Method Summary

Lookup	create(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

Methods inherited from class java.lang.Object

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

Field Detail

UNICODE_AWARE

public static final String UNICODE_AWARE

If true, maxEdits, minFuzzyLength, transpositions and nonFuzzyPrefix will be measured in Unicode code points (actual letters) instead of bytes.

See Also:

Constant Field Values

MAX_EDITS

public static final String MAX_EDITS

Maximum number of edits allowed, used by LevenshteinAutomata.toAutomaton(int) in bytes or Unicode code points (if UNICODE_AWARE option is set to true).

See Also:

Constant Field Values

TRANSPOSITIONS

public static final String TRANSPOSITIONS

If transpositions are allowed, Fuzzy suggestions will be computed based on a primitive edit operation. If it is false, it will be based on the classic Levenshtein algorithm. Transpositions of bytes or Unicode code points (if UNICODE_AWARE option is set to true).

See Also:

Constant Field Values

NON_FUZZY_PREFIX

public static final String NON_FUZZY_PREFIX

Length of common (non-fuzzy) prefix for the suggestions in bytes or Unicode code points (if UNICODE_AWARE option is set to true).

See Also:

Constant Field Values

MIN_FUZZY_LENGTH

public static final String MIN_FUZZY_LENGTH

Minimum length of lookup key before any edits are allowed for the suggestions in bytes or Unicode code points (if UNICODE_AWARE option is set to true).

See Also:

Constant Field Values

Constructor Detail

FuzzyLookupFactory

public FuzzyLookupFactory()

Method Detail

create

public Lookup create(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