org.apache.cassandra.schema

Class Functions

java.lang.Object

org.apache.cassandra.schema.Functions

All Implemented Interfaces:

java.lang.Iterable<Function>

public final class Functions
extends java.lang.Object
implements java.lang.Iterable<Function>

An immutable container for a keyspace's UDAs and UDFs (and, in case of SystemKeyspace, native functions and aggregates).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Functions.Builder
static class	Functions.Filter
static class	Functions.FunctionsDiff<T extends Function>

Method Summary

Modifier and Type	Method and Description
java.util.stream.Stream<UDAggregate>	aggregatesUsingFunction(Function function)
static Functions.Builder	builder()
boolean	equals(java.lang.Object o)
Functions	filter(java.util.function.Predicate<Function> predicate)
java.util.Optional<Function>	find(FunctionName name, java.util.List<AbstractType<?>> argTypes)
java.util.Optional<Function>	find(FunctionName name, java.util.List<AbstractType<?>> argTypes, Functions.Filter filter) Find the function with the specified name
java.util.Collection<Function>	get(FunctionName name) Get all function overloads with the specified name
java.util.Collection<UDAggregate>	getUdas(FunctionName name) Get all UDAs overloads with the specified name
java.util.Collection<UDFunction>	getUdfs(FunctionName name) Get all UDFs overloads with the specified name
int	hashCode()
boolean	isEmpty()
java.util.Iterator<Function>	iterator()
static Functions	none()
static Functions	of(Function... funs)
java.lang.Iterable<Function>	referencingUserType(java.nio.ByteBuffer name)
int	size()
java.util.stream.Stream<Function>	stream()
java.lang.String	toString()
static int	typeHashCode(AbstractType<?> t)
static int	typeHashCode(java.util.List<AbstractType<?>> types)
static boolean	typesMatch(java.util.List<AbstractType<?>> t1, java.util.List<AbstractType<?>> t2)
java.util.stream.Stream<UDAggregate>	udas()
java.util.stream.Stream<UDFunction>	udfs()
Functions	with(Function fun) Create a Functions instance with the provided function added
Functions	withAddedOrUpdated(Function function)
Functions	without(Function function)
Functions	without(FunctionName name, java.util.List<AbstractType<?>> argTypes) Creates a Functions instance with the function with the provided name and argument types removed
Functions	withUpdatedUserType(UserType udt)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

builder

public static Functions.Builder builder()

none

public static Functions none()

of

public static Functions of(Function... funs)

iterator

public java.util.Iterator<Function> iterator()

Specified by:

iterator in interface java.lang.Iterable<Function>

stream

public java.util.stream.Stream<Function> stream()

size

public int size()

udfs

public java.util.stream.Stream<UDFunction> udfs()

Returns:

a stream of keyspace's UDFs

udas

public java.util.stream.Stream<UDAggregate> udas()

Returns:

a stream of keyspace's UDAs

referencingUserType

public java.lang.Iterable<Function> referencingUserType(java.nio.ByteBuffer name)

withUpdatedUserType

public Functions withUpdatedUserType(UserType udt)

aggregatesUsingFunction

public java.util.stream.Stream<UDAggregate> aggregatesUsingFunction(Function function)

Parameters:

function - the referree function

Returns:

a stream of aggregates that use the provided function as either a state or a final function

get

public java.util.Collection<Function> get(FunctionName name)

Get all function overloads with the specified name

Parameters:

name - fully qualified function name

Returns:

an empty list if the function name is not found; a non-empty collection of Function otherwise

getUdfs

public java.util.Collection<UDFunction> getUdfs(FunctionName name)

Get all UDFs overloads with the specified name

Parameters:

name - fully qualified function name

Returns:

an empty list if the function name is not found; a non-empty collection of UDFunction otherwise

getUdas

public java.util.Collection<UDAggregate> getUdas(FunctionName name)

Get all UDAs overloads with the specified name

Parameters:

name - fully qualified function name

Returns:

an empty list if the function name is not found; a non-empty collection of UDAggregate otherwise

find

public java.util.Optional<Function> find(FunctionName name,
                                         java.util.List<AbstractType<?>> argTypes)

find

public java.util.Optional<Function> find(FunctionName name,
                                         java.util.List<AbstractType<?>> argTypes,
                                         Functions.Filter filter)

Find the function with the specified name

Parameters:

name - fully qualified function name

argTypes - function argument types

Returns:

an empty Optional if the function name is not found; a non-empty optional of Function otherwise

isEmpty

public boolean isEmpty()

typesMatch

public static boolean typesMatch(java.util.List<AbstractType<?>> t1,
                                 java.util.List<AbstractType<?>> t2)

typeHashCode

public static int typeHashCode(AbstractType<?> t)

typeHashCode

public static int typeHashCode(java.util.List<AbstractType<?>> types)

filter

public Functions filter(java.util.function.Predicate<Function> predicate)

with

public Functions with(Function fun)

Create a Functions instance with the provided function added

without

public Functions without(FunctionName name,
                         java.util.List<AbstractType<?>> argTypes)

Creates a Functions instance with the function with the provided name and argument types removed

without

public Functions without(Function function)

withAddedOrUpdated

public Functions withAddedOrUpdated(Function function)

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object