org.apache.lucene.search.suggest.analyzing

Class BlendedInfixSuggester

java.lang.Object

org.apache.lucene.search.suggest.Lookup

org.apache.lucene.search.suggest.analyzing.AnalyzingInfixSuggester

org.apache.lucene.search.suggest.analyzing.BlendedInfixSuggester

All Implemented Interfaces:

Closeable, AutoCloseable

public class BlendedInfixSuggester
extends AnalyzingInfixSuggester

Extension of the AnalyzingInfixSuggester which transforms the weight after search to take into account the position of the searched term into the indexed text. Please note that it increases the number of elements searched and applies the ponderation after. It might be costly for long suggestions.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BlendedInfixSuggester.BlenderType The different types of blender.

Nested classes/interfaces inherited from class org.apache.lucene.search.suggest.Lookup

Lookup.LookupPriorityQueue, Lookup.LookupResult

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_NUM_FACTOR Default factor

Fields inherited from class org.apache.lucene.search.suggest.analyzing.AnalyzingInfixSuggester

DEFAULT_MIN_PREFIX_CHARS

Fields inherited from class org.apache.lucene.search.suggest.Lookup

CHARSEQUENCE_COMPARATOR

Constructor Summary

Constructors

Constructor and Description
BlendedInfixSuggester(Version matchVersion, File indexPath, Analyzer analyzer) Create a new instance, loading from a previously built directory, if it exists.
BlendedInfixSuggester(Version matchVersion, File indexPath, Analyzer indexAnalyzer, Analyzer queryAnalyzer, int minPrefixChars, BlendedInfixSuggester.BlenderType blenderType, int numFactor) Create a new instance, loading from a previously built directory, if it exists.

Method Summary

Modifier and Type	Method and Description
List<Lookup.LookupResult>	lookup(CharSequence key, boolean onlyMorePopular, int num) Look up a key and return possible completion for this key.
List<Lookup.LookupResult>	lookup(CharSequence key, int num, boolean allTermsRequired, boolean doHighlight) Retrieve suggestions, specifying whether all terms must match (allTermsRequired) and whether the hits should be highlighted (doHighlight).

Methods inherited from class org.apache.lucene.search.suggest.analyzing.AnalyzingInfixSuggester

build, close, getCount, load, sizeInBytes, store

Methods inherited from class org.apache.lucene.search.suggest.Lookup

build, load, store

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_NUM_FACTOR

public static int DEFAULT_NUM_FACTOR

Default factor

Constructor Detail

BlendedInfixSuggester

public BlendedInfixSuggester(Version matchVersion,
                             File indexPath,
                             Analyzer analyzer)
                      throws IOException

Create a new instance, loading from a previously built directory, if it exists.

Throws:

IOException

BlendedInfixSuggester

public BlendedInfixSuggester(Version matchVersion,
                             File indexPath,
                             Analyzer indexAnalyzer,
                             Analyzer queryAnalyzer,
                             int minPrefixChars,
                             BlendedInfixSuggester.BlenderType blenderType,
                             int numFactor)
                      throws IOException

Create a new instance, loading from a previously built directory, if it exists.

Parameters:

blenderType - Type of blending strategy, see BlenderType for more precisions

numFactor - Factor to multiply the number of searched elements before ponderate

Throws:

IOException - If there are problems opening the underlying Lucene index.

Method Detail

lookup

public List<Lookup.LookupResult> lookup(CharSequence key,
                                        boolean onlyMorePopular,
                                        int num)

Description copied from class: Lookup

Look up a key and return possible completion for this key.

Overrides:

lookup in class AnalyzingInfixSuggester

Parameters:

key - lookup key. Depending on the implementation this may be a prefix, misspelling, or even infix.

onlyMorePopular - return only more popular results

num - maximum number of results to return

Returns:

a list of possible completions, with their relative weight (e.g. popularity)

lookup

public List<Lookup.LookupResult> lookup(CharSequence key,
                                        int num,
                                        boolean allTermsRequired,
                                        boolean doHighlight)

Description copied from class: AnalyzingInfixSuggester

Retrieve suggestions, specifying whether all terms must match (allTermsRequired) and whether the hits should be highlighted (doHighlight).

Overrides:

lookup in class AnalyzingInfixSuggester