Package org.apache.cassandra.cql3.functions

Class NativeFunction

java.lang.Object

org.apache.cassandra.cql3.functions.AbstractFunction

org.apache.cassandra.cql3.functions.NativeFunction

All Implemented Interfaces:

AssignmentTestable, Function

Direct Known Subclasses:

NativeAggregateFunction, NativeScalarFunction

public abstract class NativeFunction
extends AbstractFunction

Base class for our native/hardcoded functions.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.AssignmentTestable

AssignmentTestable.TestResult

Field Summary

Fields inherited from class org.apache.cassandra.cql3.functions.AbstractFunction

argTypes, name, returnType

Fields inherited from interface org.apache.cassandra.cql3.functions.Function

UNRESOLVED

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	NativeFunction(String name, AbstractType<?> returnType, AbstractType<?>... argTypes)

Method Summary

Modifier and Type	Method	Description
final boolean	isNative()	Checks whether the function is a native/hard coded one or not.
boolean	isPure()	Checks whether the function is a pure function (as in doesn't depend on, nor produces side effects) or not.
Arguments	newArguments(ProtocolVersion version)	Creates some new input arguments for this function.
NativeFunction	withLegacyName()	Returns a copy of this function using its old pre-5.0 name before the adoption of snake-cased function names.

Methods inherited from class org.apache.cassandra.cql3.functions.AbstractFunction

addFunctionsTo, argTypes, argumentsList, columnName, elementKeyspace, elementName, equals, getCompatibleTypeIfKnown, hashCode, name, referencesUserType, returnType, testAssignment, toCqlString, toString, typesMatch

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.cassandra.cql3.functions.Function

compare, isAggregate

Constructor Details

NativeFunction

protected NativeFunction(String name,
 AbstractType<?> returnType,
 AbstractType<?>... argTypes)

Method Details

isNative

public final boolean isNative()

Description copied from interface: Function

Checks whether the function is a native/hard coded one or not.

Returns:

true if the function is a native/hard coded one, false otherwise.

isPure

public boolean isPure()

Description copied from interface: Function

Checks whether the function is a pure function (as in doesn't depend on, nor produces side effects) or not.

Returns:

true if the function is a pure function, false otherwise.

withLegacyName

@Nullable
public NativeFunction withLegacyName()

Returns a copy of this function using its old pre-5.0 name before the adoption of snake-cased function names. Those naming conventions were adopted in 5.0, but we still need to support the old names for compatibility. See CASSANDRA-18037 for further details.

Returns:

a copy of this function using its old pre-5.0 deprecated name, or null if the pre-5.0 function name already satisfied the naming conventions.

newArguments

public Arguments newArguments(ProtocolVersion version)

Description copied from interface: Function

Creates some new input arguments for this function.

Parameters:

version - the protocol version

Returns:

some new input arguments for this function