public final Class EmptyIterable<E>

Class Inheritance

extends Object
implements Iterable<E>, Serializable

java.lang.Object
org.eclipse.persistence.jpa.jpql.tools.utility.iterable.EmptyIterable

All Implemented Interfaces

java.io.Serializable, java.lang.Iterable

Annotations

@SuppressWarnings:nls

Type Parameters

<E>: the type of elements returned by the iterable's iterator

Imports

java.io.Serializable, java.util.Iterator, org.eclipse.persistence.jpa.jpql.tools.utility.iterator.EmptyIterator

An EmptyIterable is just that. Maybe just a touch better-performing than java.util.Collections#EMPTY_SET since we don't create a new Iterator every time iterator() is called. (Not sure why they do that....)

Since: 2.5
Version: 2.5
See Also: EmptyIterator, EmptyListIterable

Field Summary

Modifier and Type	Field and Description
private static final Iterable<Object>	INSTANCE The singleton instance of this `EmptyIterable`.
private static final long	serialVersionUID The serial version UID of this class.

Constructor Summary

Access	Constructor and Description
private	EmptyIterable() Creates a new `EmptyIterable` and insures single instance.

Method Summary

Modifier and Type	Method and Description
public static <T> Iterable<T>	Returns: The singleton instance instance() Return the singleton instance of this `Iterable`.
public Iterator<E>	iterator() Implements java.lang.Iterable.iterator. Returns an iterator over elements of type `T`.
private Object	readResolve()
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll wait wait wait

Field Detail

INSTANCE	back to summary
private static final Iterable<Object> INSTANCE The singleton instance of this `EmptyIterable`.

serialVersionUID	back to summary
private static final long serialVersionUID The serial version UID of this class.

Constructor Detail

EmptyIterable	back to summary
private EmptyIterable() Creates a new `EmptyIterable` and insures single instance.

Method Detail

instance back to summary

instance	back to summary
public static <T> Iterable<T> instance() Return the singleton instance of this `Iterable`. Returns:Iterable<T> The singleton instance Annotations @SuppressWarnings:unchecked

public static <T> Iterable<T> instance()

Return the singleton instance of this Iterable.

Returns:Iterable<T>

The singleton instance

Annotations

@SuppressWarnings:unchecked

iterator back to summary

iterator	back to summary
public Iterator<E> iterator() Implements java.lang.Iterable.iterator. Doc from java.lang.Iterable.iterator. Returns an iterator over elements of type `T`. Returns:Iterator<E> an Iterator. Annotations @Override

public Iterator<E> iterator()

Implements java.lang.Iterable.iterator.

Doc from java.lang.Iterable.iterator.

Returns an iterator over elements of type T.

Returns:Iterator<E>

an Iterator.

Annotations

@Override

readResolve	back to summary
private Object readResolve()

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Doc from java.lang.Object.toString. Returns a string representation of the object. Returns:String a string representation of the object. Annotations @Override

toString

back to summary

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object.

Returns:String

a string representation of the object.

Annotations

@Override