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

Method Summary

Modifier and Type	Method and Description
java.util.Collection<UDAggregate>	aggregatesUsingFunction(Function function)
static Functions.Builder	builder()
boolean	equals(java.lang.Object o)
java.util.Optional<Function>	find(FunctionName name, java.util.List<AbstractType<?>> argTypes) Find the function with the specified name
java.util.Collection<Function>	get(FunctionName name) Get all function overloads with the specified name
int	hashCode()
java.util.Iterator<Function>	iterator()
static Functions	none()
static Functions	of(Function... funs)
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(AbstractType<?> t1, AbstractType<?> t2)
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	without(FunctionName name, java.util.List<AbstractType<?>> argTypes) Creates a Functions instance with the function with the provided name and argument types removed

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()

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

aggregatesUsingFunction

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

Parameters:

function - the referree function

Returns:

a collection 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

find

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

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

typesMatch

public static boolean typesMatch(AbstractType<?> t1,
                                 AbstractType<?> t2)

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)

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

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