Package org.apache.cassandra.cql3.functions

Class FunctionArguments

java.lang.Object

org.apache.cassandra.cql3.functions.FunctionArguments

All Implemented Interfaces:

Arguments

public final class FunctionArguments
extends java.lang.Object
implements Arguments

Default Arguments implementation.

Constructor Summary

Constructors

Constructor	Description
FunctionArguments(ProtocolVersion version, ArgumentDeserializer... deserializers)

Method Summary

Modifier and Type	Method	Description
boolean	containsNulls()	Checks if at least one of the arguments is null.
static FunctionArguments	emptyInstance(ProtocolVersion version)	Creates an empty FunctionArguments.
<T> T	get(int i)	Returns the specified argument
ProtocolVersion	getProtocolVersion()	Returns the protocol version
static FunctionArguments	newInstanceForNativeFunction(ProtocolVersion version, java.util.List<AbstractType<?>> argTypes)	Creates a new FunctionArguments for a native function.
static FunctionArguments	newInstanceForUdf(ProtocolVersion version, java.util.List<UDFDataType> argTypes)	Creates a new FunctionArguments for the specified types.
static FunctionArguments	newNoopInstance(ProtocolVersion version, int numberOfArguments)	Creates a new FunctionArguments that does not deserialize the arguments.
void	set(int i, java.nio.ByteBuffer buffer)	Sets the specified value to the arguments
int	size()	Returns the current number of arguments.

Methods inherited from class java.lang.Object

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

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

getAsBoolean, getAsByte, getAsDouble, getAsFloat, getAsInt, getAsLong, getAsShort

Constructor Detail

FunctionArguments

public FunctionArguments(ProtocolVersion version,
                         ArgumentDeserializer... deserializers)

Method Detail

newInstanceForUdf

public static FunctionArguments newInstanceForUdf(ProtocolVersion version,
                                                  java.util.List<UDFDataType> argTypes)

Creates a new FunctionArguments for the specified types.

Parameters:

version - the protocol version

argTypes - the argument types

Returns:

a new FunctionArguments for the specified types.

getProtocolVersion

public ProtocolVersion getProtocolVersion()

Description copied from interface: Arguments

Returns the protocol version

Specified by:

getProtocolVersion in interface Arguments

Returns:

the protocol version

newNoopInstance

public static FunctionArguments newNoopInstance(ProtocolVersion version,
                                                int numberOfArguments)

Creates a new FunctionArguments that does not deserialize the arguments.

Parameters:

version - the protocol version

numberOfArguments - the number of argument

Returns:

a new FunctionArguments for the specified types.

emptyInstance

public static FunctionArguments emptyInstance(ProtocolVersion version)

Creates an empty FunctionArguments.

Parameters:

version - the protocol version

Returns:

an empty FunctionArguments

newInstanceForNativeFunction

public static FunctionArguments newInstanceForNativeFunction(ProtocolVersion version,
                                                             java.util.List<AbstractType<?>> argTypes)

Creates a new FunctionArguments for a native function.

Native functions can use different ArgumentDeserializer to avoid instanciating primitive wrappers.

Parameters:

version - the protocol version

argTypes - the argument types

Returns:

a new FunctionArguments for the specified types.

set

public void set(int i,
                java.nio.ByteBuffer buffer)

Description copied from interface: Arguments

Sets the specified value to the arguments

Specified by:

set in interface Arguments

Parameters:

i - the argument position

buffer - the serialized argument

containsNulls

public boolean containsNulls()

Description copied from interface: Arguments

Checks if at least one of the arguments is null.

Specified by:

containsNulls in interface Arguments

Returns:

true if at least one of the arguments is null, false otherwise.

get

public <T> T get(int i)

Description copied from interface: Arguments

Returns the specified argument

Specified by:

get in interface Arguments

Parameters:

i - the argument index

Returns:

the specified argument

size

public int size()

Description copied from interface: Arguments

Returns the current number of arguments.

Specified by:

size in interface Arguments

Returns:

the current number of arguments.