Class StupidBackoff
java.lang.Object
org.elasticsearch.search.suggest.phrase.SmoothingModel
org.elasticsearch.search.suggest.phrase.StupidBackoff
- All Implemented Interfaces:
NamedWriteable
,Writeable
,org.elasticsearch.xcontent.ToXContent
,org.elasticsearch.xcontent.ToXContentFragment
A "stupid-backoff" smoothing model similar to Katz's
Backoff. This model is used as the default if no model is configured.
See N-Gram Smoothing for details.
-
Nested Class Summary
Nested classes/interfaces inherited from interface org.elasticsearch.xcontent.ToXContent
org.elasticsearch.xcontent.ToXContent.DelegatingMapParams, org.elasticsearch.xcontent.ToXContent.MapParams, org.elasticsearch.xcontent.ToXContent.Params
Nested classes/interfaces inherited from interface org.elasticsearch.common.io.stream.Writeable
Writeable.Reader<V>, Writeable.Writer<V>
-
Field Summary
Modifier and TypeFieldDescriptionstatic final double
Default discount parameter forStupidBackoff
smoothingstatic final String
Fields inherited from interface org.elasticsearch.xcontent.ToXContent
EMPTY_PARAMS
-
Constructor Summary
ConstructorDescriptionStupidBackoff
(double discount) Creates a Stupid-Backoff smoothing model.Read from a stream. -
Method Summary
Modifier and TypeMethodDescriptionprotected boolean
doEquals
(SmoothingModel other) subtype specific implementation of "equals".protected int
static SmoothingModel
fromXContent
(org.elasticsearch.xcontent.XContentParser parser) double
Returns the name of the writeable objectprotected org.elasticsearch.xcontent.XContentBuilder
innerToXContent
(org.elasticsearch.xcontent.XContentBuilder builder, org.elasticsearch.xcontent.ToXContent.Params params) void
writeTo
(StreamOutput out) Write this into the StreamOutput.Methods inherited from class org.elasticsearch.search.suggest.phrase.SmoothingModel
equals, hashCode, toXContent
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.elasticsearch.xcontent.ToXContentFragment
isFragment
-
Field Details
-
DEFAULT_BACKOFF_DISCOUNT
public static final double DEFAULT_BACKOFF_DISCOUNTDefault discount parameter forStupidBackoff
smoothing- See Also:
-
NAME
- See Also:
-
-
Constructor Details
-
StupidBackoff
public StupidBackoff(double discount) Creates a Stupid-Backoff smoothing model.- Parameters:
discount
- the discount given to lower order ngrams if the higher order ngram doesn't exits
-
StupidBackoff
Read from a stream.- Throws:
IOException
-
-
Method Details
-
writeTo
Description copied from interface:Writeable
Write this into the StreamOutput.- Throws:
IOException
-
getDiscount
public double getDiscount()- Returns:
- the discount parameter of the model
-
innerToXContent
protected org.elasticsearch.xcontent.XContentBuilder innerToXContent(org.elasticsearch.xcontent.XContentBuilder builder, org.elasticsearch.xcontent.ToXContent.Params params) throws IOException - Specified by:
innerToXContent
in classSmoothingModel
- Throws:
IOException
-
getWriteableName
Description copied from interface:NamedWriteable
Returns the name of the writeable object -
doEquals
Description copied from class:SmoothingModel
subtype specific implementation of "equals".- Specified by:
doEquals
in classSmoothingModel
-
doHashCode
protected int doHashCode()- Specified by:
doHashCode
in classSmoothingModel
-
fromXContent
public static SmoothingModel fromXContent(org.elasticsearch.xcontent.XContentParser parser) throws IOException - Throws:
IOException
-
buildWordScorerFactory
- Specified by:
buildWordScorerFactory
in classSmoothingModel
-