org.jdbi.v3.core.internal

Class IterableLike

java.lang.Object

org.jdbi.v3.core.internal.IterableLike

public class IterableLike
extends Object

Implements Iterator methods for unidentified arrays and Iterable things that do not have a more specific type than Object. Note that its elements will be returned as Object, primitives included (will be autoboxed).

Method Summary

Modifier and Type	Method and Description
static Optional<Type>	elementTypeOf(Object iterable) Given an iterable-like object, try to determine its static (i.e, without looking at contents) element type.
static Optional<Type>	elementTypeOf(Type type) Given an iterable-like type, try to determine its static (i.e, without looking at contents) element type.
static boolean	isEmpty(Object obj) Attempt to determine if a iterable-like is empty, preferably without iterating.
static boolean	isIterable(Object maybeIterable)
static Iterable<Object>	iterable(Object iterable) Given an iterable object (which may be a iterator, iterable, primitive or reference array), return an iterable over its (possibly boxed) elements.
static Iterator<Object>	of(Object iterable) Given an iterable object (which may be a iterator, iterable, primitive or reference array), return an iterator over its (possibly boxed) elements.
static Stream<Object>	stream(Object iterable) Given an iterable object (which may be a iterator, iterable, primitive or reference array), return a Stream over its (possibly boxed) elements.
static List<Object>	toList(Object iterable) Collect an iterable-like into a newly allocated ArrayList.

Methods inherited from class java.lang.Object

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

Method Detail

elementTypeOf

public static Optional<Type> elementTypeOf(Object iterable)

Given an iterable-like object, try to determine its static (i.e, without looking at contents) element type.

elementTypeOf

public static Optional<Type> elementTypeOf(Type type)

Given an iterable-like type, try to determine its static (i.e, without looking at contents) element type.

isEmpty

public static boolean isEmpty(Object obj)

Attempt to determine if a iterable-like is empty, preferably without iterating.

Parameters:

obj - the iterable-like to check for emptiness

Returns:

emptiness to fill your heart

isIterable

public static boolean isIterable(Object maybeIterable)

Parameters:

maybeIterable - the object that might be iterable

Returns:

whether IterableLike can iterate over the given object

iterable

public static Iterable<Object> iterable(Object iterable)

Given an iterable object (which may be a iterator, iterable, primitive or reference array), return an iterable over its (possibly boxed) elements.

Parameters:

iterable - the iterable-like to create a real Iterable for

Returns:

the created Iterable

of

public static Iterator<Object> of(Object iterable)

Given an iterable object (which may be a iterator, iterable, primitive or reference array), return an iterator over its (possibly boxed) elements.

Parameters:

iterable - the iterable-like

Returns:

an iterator of the given array's elements

stream

public static Stream<Object> stream(Object iterable)

Given an iterable object (which may be a iterator, iterable, primitive or reference array), return a Stream over its (possibly boxed) elements.

Returns:

a stream of the given array's elements

toList

public static List<Object> toList(Object iterable)

Collect an iterable-like into a newly allocated ArrayList.

Parameters:

iterable - the iterable-like to collect

Returns:

a new list with the elements