Package org.apache.cassandra.cql3

Interface AssignmentTestable

All Known Subinterfaces:

AggregateFunction, Function, PartialScalarFunction, ScalarFunction, Selectable

All Known Implementing Classes:

AbstractCompositeType, AbstractFunction, AbstractMarker.INRaw, AbstractMarker.MultiColumnRaw, AbstractMarker.Raw, AbstractTimeUUIDType, AbstractType, AggregateFcts.CountRowsFunction, ArrayLiteral, AsciiType, BooleanType, BytesConversionFcts.FromBlobFunction, BytesConversionFcts.ToBlobFunction, BytesType, ByteType, CollectionType, ColumnMetadata, CompositeType, Constants.Literal, CounterColumnType, DateType, DecimalType, DefaultMaskingFunction, DoubleType, DurationType, DynamicCompositeType, DynamicCompositeType.FixedValueComparator, EmptyType, FloatType, FromJsonFct, FrozenType, FunctionCall.Raw, HashMaskingFunction, InetAddressType, Int32Type, IntegerType, JavaBasedUDFunction, LegacyTimeUUIDType, LexicalUUIDType, Lists.Literal, ListType, LongType, Maps.Literal, MapType, MaskingFunction, NativeAggregateFunction, NativeFunction, NativeScalarFunction, NullMaskingFunction, NumberType, PartialMaskingFunction, PartitionerDefinedOrder, ReplaceMaskingFunction, ReversedType, Selectable.BetweenParenthesesOrWithTuple, Selectable.WithArrayLiteral, Selectable.WithCast, Selectable.WithElementSelection, Selectable.WithFieldSelection, Selectable.WithFunction, Selectable.WithList, Selectable.WithMapOrUdt, Selectable.WithSet, Selectable.WithSliceSelection, Selectable.WithTerm, Selectable.WithTypeHint, Selectable.WithVector, Selectable.WritetimeOrTTL, Sets.Literal, SetType, ShortType, SimpleDateType, StringType, TemporalType, Term.MultiColumnRaw, Term.Raw, TimeFcts.FloorDateFunction, TimeFcts.FloorTimestampFunction, TimeFcts.FloorTimeUuidFunction, TimeFcts.TemporalConversionFunction, TimestampType, TimeType, TimeUUIDType, ToJsonFct, TokenFct, Tuples.INRaw, Tuples.Literal, Tuples.Raw, TupleType, TypeCast, UDAggregate, UDFunction, UserFunction, UserType, UserTypes.Literal, UTF8Type, UUIDType, Vectors.Literal, VectorType

public interface AssignmentTestable

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	AssignmentTestable.TestResult

Method Summary

Modifier and Type	Method	Description
AbstractType<?>	getCompatibleTypeIfKnown(java.lang.String keyspace)
static AbstractType<?>	getCompatibleTypeIfKnown(java.util.Collection<AbstractType<?>> types)
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.

getCompatibleTypeIfKnown

@Nullable
AbstractType<?> getCompatibleTypeIfKnown(java.lang.String keyspace)

Returns:

A data type that can represent this, or null if we can't determine that type. The returned type won't necessarely be the exact type, but one that is compatible with it.

getCompatibleTypeIfKnown

@Nullable
static AbstractType<?> getCompatibleTypeIfKnown(java.util.Collection<AbstractType<?>> types)

Returns:

A data type that can represent all the specified types, or null if there isn't one.