io.asyncer.r2dbc.mysql.internal.util

Class InternalArrays

java.lang.Object

io.asyncer.r2dbc.mysql.internal.util.InternalArrays

public final class InternalArrays
extends Object

An utility with constants of arrays for reduce temporary objects and ensure immutability, do NOT use it outer than r2dbc-mysql.

Field Summary

Fields

Modifier and Type	Field and Description
static byte[]	EMPTY_BYTES
static String[]	EMPTY_STRINGS

Method Summary

Modifier and Type	Method and Description
static <E> List<E>	asImmutableList(E... a) Wrap an array to an immutable List without deep copy.
static <E> Iterator<E>	asIterator(E... a) Wrap an array to a read only Iterator.
static <E> List<E>	toImmutableList(E... a) Convert an array to an immutable List with array copy.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_BYTES

public static final byte[] EMPTY_BYTES

EMPTY_STRINGS

public static final String[] EMPTY_STRINGS

Method Detail

asImmutableList

@SafeVarargs
public static <E> List<E> asImmutableList(E... a)

Wrap an array to an immutable List without deep copy.

WARNING: make sure a will not be changed by other one.

Type Parameters:

E - the type for elements of a.

Parameters:

a - the array which want to be wrapped.

Returns:

read only List.

toImmutableList

@SafeVarargs
public static <E> List<E> toImmutableList(E... a)

Convert an array to an immutable List with array copy. It will copy array but will not clone each element.

Type Parameters:

E - the type for elements of a.

Parameters:

a - the array which want to be converted.

Returns:

read only List.

asIterator

@SafeVarargs
public static <E> Iterator<E> asIterator(E... a)

Wrap an array to a read only Iterator.

WARNING: make sure a will not be changed by other one.

Type Parameters:

E - the type for elements of a.

Parameters:

a - the array which want to be wrapped.

Returns:

read only Iterator.