Package com.yahoo.searchdefinition

Class FeatureNames

java.lang.Object

com.yahoo.searchdefinition.FeatureNames

public class FeatureNames
extends Object

Utility methods for query, document and constant rank feature names

Author:

bratseth

Constructor Summary

Constructors

Constructor	Description
FeatureNames()

Method Summary

Modifier and Type	Method	Description
static Optional<String>	argumentOf(String feature)	Returns the single argument of the given feature name, without any quotes, or empty if it is not a valid query, attribute or constant feature name
static com.yahoo.searchlib.rankingexpression.Reference	asAttributeFeature(String attributeName)
static com.yahoo.searchlib.rankingexpression.Reference	asConstantFeature(String constantName)
static com.yahoo.searchlib.rankingexpression.Reference	asQueryFeature(String propertyName)
static boolean	isConstantFeature(com.yahoo.searchlib.rankingexpression.Reference reference)	Returns true if this is a constant
static boolean	isSimpleFeature(com.yahoo.searchlib.rankingexpression.Reference reference)	Returns true if the given reference is an attribute, constant or query feature

Methods inherited from class java.lang.Object

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

Constructor Detail

FeatureNames

public FeatureNames()

Method Detail

asConstantFeature

public static com.yahoo.searchlib.rankingexpression.Reference asConstantFeature(String constantName)

asAttributeFeature

public static com.yahoo.searchlib.rankingexpression.Reference asAttributeFeature(String attributeName)

asQueryFeature

public static com.yahoo.searchlib.rankingexpression.Reference asQueryFeature(String propertyName)

isSimpleFeature

public static boolean isSimpleFeature(com.yahoo.searchlib.rankingexpression.Reference reference)

Returns true if the given reference is an attribute, constant or query feature

isConstantFeature

public static boolean isConstantFeature(com.yahoo.searchlib.rankingexpression.Reference reference)

Returns true if this is a constant

argumentOf

public static Optional<String> argumentOf(String feature)

Returns the single argument of the given feature name, without any quotes, or empty if it is not a valid query, attribute or constant feature name