Package org.cactoos.collection

Class NoNulls<X>

java.lang.Object

org.cactoos.collection.NoNulls<X>

Type Parameters:

X - Element type

All Implemented Interfaces:

Iterable<X>, Collection<X>

public final class NoNulls<X>
extends Object
implements Collection<X>

A decorator of Collection that tolerates no NULLs.

There is no thread-safety guarantee.

Since:

0.27

Constructor Summary

Constructors

Constructor	Description
NoNulls(Collection<X> items)	Ctor without '? extends X' wildcard because of the issue: The client gets Collection of X The client adds item of X to it The client queries items of original Collection of ? extends X Runtime exception occurs

Method Summary

Modifier and Type	Method	Description
boolean	add(X item)
boolean	addAll(Collection<? extends X> items)
void	clear()
boolean	contains(Object item)
boolean	containsAll(Collection<?> items)
boolean	equals(Object obj)
int	hashCode()
boolean	isEmpty()
Iterator<X>	iterator()
boolean	remove(Object item)
boolean	removeAll(Collection<?> items)
boolean	retainAll(Collection<?> items)
int	size()
Object[]	toArray()
<T> T[]	toArray(T[] array)
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

parallelStream, removeIf, spliterator, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

NoNulls

public NoNulls(Collection<X> items)

Ctor without '? extends X' wildcard because of the issue:

1. The client gets Collection of X
2. The client adds item of X to it
3. The client queries items of original Collection of ? extends X
4. Runtime exception occurs

Parameters:

items - Original one.

Method Detail

size

public int size()

Specified by:

size in interface Collection<X>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<X>

iterator

public Iterator<X> iterator()

Specified by:

iterator in interface Collection<X>

Specified by:

iterator in interface Iterable<X>

contains

public boolean contains(Object item)

Specified by:

contains in interface Collection<X>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<X>

toArray

public <T> T[] toArray(T[] array)

Specified by:

toArray in interface Collection<X>

add

public boolean add(X item)

Specified by:

add in interface Collection<X>

remove

public boolean remove(Object item)

Specified by:

remove in interface Collection<X>

containsAll

public boolean containsAll(Collection<?> items)

Specified by:

containsAll in interface Collection<X>

addAll

public boolean addAll(Collection<? extends X> items)

Specified by:

addAll in interface Collection<X>

removeAll

public boolean removeAll(Collection<?> items)

Specified by:

removeAll in interface Collection<X>

retainAll

public boolean retainAll(Collection<?> items)

Specified by:

retainAll in interface Collection<X>

clear

public void clear()

Specified by:

clear in interface Collection<X>

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Specified by:

equals in interface Collection<X>

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<X>

Overrides:

hashCode in class Object