org.eclipse.rdf4j.query.algebra.evaluation.function

## Interface Function

- All Known Subinterfaces:
    TransientFunction
  All Known Implementing Classes:
    Abs, Add, And, AskFunction, BinaryFunction, BooleanCast, BooleanCast, Boundary, Buffer, BuildString, BuildURI, ByteCast, CanInvoke, Cast, CastFunction, Ceil, Concat, Concat, Contains, ConvertSpinRDFToString, ConvexHull, CurrentTimeMillis, DateFormat, DateTimeCast, DateTimeCast, Day, DecimalCast, DecimalCast, DecimalFormat, DecodeURL, Difference, Distance, Divide, DoubleCast, DoubleCast, EhContains, EhCoveredBy, EhCovers, EhDisjoint, EhEquals, EhInside, EhMeet, EhOverlap, EncodeForUri, EncodeURL, Envelope, EqualTo, EvalFunction, FloatCast, FloatCast, Floor, GenerateUUID, GreaterThan, GreaterThanOrEqualTo, HasAllObjects, HashFunction, Hours, IndexOf, IntCast, IntegerCast, IntegerCast, IntegerCastFunction, Intersection, Invoke, IsTripleFunction, IsValidURI, LastIndexOf, LessThan, LessThanOrEqualTo, Localname, LongCast, LowerCase, LowerCase, LowerTitleCase, MD5, Minutes, Mod, Month, Multiply, Name, NegativeIntegerCast, NonNegativeIntegerCast, NonPositiveIntegerCast, Not, NotEqualTo, Now, ObjectFunction, Or, ParseDate, PositiveIntegerCast, Rand, Random, RCC8DC, RCC8EC, RCC8EQ, RCC8NTPP, RCC8NTPPI, RCC8PO, RCC8TPP, RCC8TPPI, Relate, Replace, ReplaceAll, Round, Seconds, SfContains, SfCrosses, SfDisjoint, SfEquals, SfIntersects, SfOverlaps, SfTouches, SfWithin, SHA1, SHA256, SHA384, SHA512, ShortCast, SpinFunction, SpinxFunction, SRID, StatementFunction, StrAfter, StrBefore, StrDt, StrEnds, StringCast, StringCast, StrLang, StrLen, StrStarts, STRUUID, Substring, Subtract, SymmetricDifference, TimeMillis, Timezone, TitleCase, Trim, TripleObjectFunction, TriplePredicateFunction, TripleSubjectFunction, Tz, UnaryFunction, UnCamelCase, Union, UnsignedByteCast, UnsignedIntCast, UnsignedLongCast, UnsignedShortCast, UpperCase, UpperCase, UUID, Year

      public interface Function

  A query function, which can be a built-in function in the query language, or a custom function as documented in the SPARQL 1.1 Query Language Recommendation.
  Author:
    Arjohn Kampman, Jeen Broekstra
  See Also:
    `FunctionRegistry`

- - ### Method Summary

    All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods
    Modifier and Type | Method and Description
    --- | ---
    `default Value` | `evaluate(TripleSource tripleSource, Value... args)` Evaluate the function over the supplied input arguments.
    `Value` | `evaluate(ValueFactory valueFactory, Value... args)` Deprecated. since 3.3.0. Use `evaluate(TripleSource, Value...)` instead. A reference to a ValueFactory can be retrieved using `TripleSource.getValueFactory()` if needed.
    `String` | `getURI()`

- - ### Method Detail

    - #### getURI

          String getURI()

    - #### evaluate

          @Deprecated
          Value evaluate(ValueFactory valueFactory,
                                     Value... args)
                              throws ValueExprEvaluationException

      Deprecated. since 3.3.0. Use `evaluate(TripleSource, Value...)` instead. A reference to a ValueFactory can be retrieved using `TripleSource.getValueFactory()` if needed.
      Evaluate the function over the supplied input arguments, using the supplied `ValueFactory` to produce the result.
      Parameters:
        `valueFactory` - a `ValueFactory` to use for producing the function result.
        `args` - the function input arguments.
      Returns:
        the function result value.
      Throws:
        `ValueExprEvaluationException`

    - #### evaluate

          default Value evaluate(TripleSource tripleSource,
                                 Value... args)
                          throws ValueExprEvaluationException

      Evaluate the function over the supplied input arguments.
      Parameters:
        `tripleSource` - the `TripleSource` used in the query evaluation. This can be used to access the current state of the store.
        `args` - the function input arguments.
      Returns:
        the function result value.
      Throws:
        `ValueExprEvaluationException`
      Since:
        3.3.0

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