AssignmentTestable (apache-cassandra API)
Date: 2018-02-12

org.apache.cassandra.cql3

## Interface AssignmentTestable

- All Known Subinterfaces:
    AggregateFunction, Function, ScalarFunction, Term.MultiColumnRaw, Term.Raw
  All Known Implementing Classes:
    AbstractFunction, AbstractMarker.INRaw, AbstractMarker.Raw, Constants.Literal, FromJsonFct, FunctionCall.Raw, Lists.Literal, Maps.Literal, NativeAggregateFunction, NativeFunction, NativeScalarFunction, ScriptBasedUDF, Selector, Sets.Literal, SimpleSelector, ToJsonFct, TokenFct, Tuples.INRaw, Tuples.Literal, Tuples.Raw, TypeCast, UDAggregate, UDFunction, UserTypes.Literal

      public interface AssignmentTestable

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Interface and Description
    --- | ---
    `static class` | `AssignmentTestable.TestResult`

  - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `AssignmentTestable.TestResult` | `testAssignment(java.lang.String keyspace, ColumnSpecification receiver)`

- - ### Method Detail

    - #### testAssignment

          AssignmentTestable.TestResult testAssignment(java.lang.String keyspace,
                                                       ColumnSpecification receiver)

      Returns:
        whether this object can be assigned to the provided receiver. We distinguish between 3 values: - EXACT_MATCH if this object is exactly of the type expected by the receiver - WEAKLY_ASSIGNABLE if this object is not exactly the expected type but is assignable nonetheless - NOT_ASSIGNABLE if it's not assignable Most caller should just call the isAssignable() method on the result, though functions have a use for testing "strong" equality to decide the most precise overload to pick when multiple could match.

Copyright © 2018 The Apache Software Foundation