Package com.google.common.collect

Class ImmutableCollection<E>

java.lang.Object

java.util.AbstractCollection<E>

com.google.common.collect.ImmutableCollection<E>

All Implemented Interfaces:

Serializable, Iterable<E>, Collection<E>

Direct Known Subclasses:

ImmutableList, ImmutableMultiset, ImmutableSet

@GwtCompatible(emulated=true)
public abstract class ImmutableCollection<E>
extends AbstractCollection<E>
implements Serializable

An immutable collection. Does not permit null elements.

In addition to the Collection methods, this class has an asList() method, which returns a list view of the collection's elements.

Note: Although this class is not final, it cannot be subclassed outside of this package as it has no public or protected constructors. Thus, instances of this type are guaranteed to be immutable.

Since:

2.0 (imported from Google Collections Library)

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ImmutableCollection.Builder<E>	Abstract base class for builders of ImmutableCollection types.

Method Summary

Modifier and Type	Method	Description
boolean	add(E e)	Deprecated. Unsupported operation.
boolean	addAll(Collection<? extends E> newElements)	Deprecated. Unsupported operation.
ImmutableList<E>	asList()	Returns a list view of the collection.
void	clear()	Deprecated. Unsupported operation.
boolean	contains(Object object)
abstract UnmodifiableIterator<E>	iterator()	Returns an unmodifiable iterator across the elements in this collection.
boolean	remove(Object object)	Deprecated. Unsupported operation.
boolean	removeAll(Collection<?> oldElements)	Deprecated. Unsupported operation.
boolean	retainAll(Collection<?> elementsToKeep)	Deprecated. Unsupported operation.
Object[]	toArray()
<T> T[]	toArray(T[] other)

Methods inherited from class java.util.AbstractCollection

containsAll, isEmpty, size, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

equals, hashCode, parallelStream, removeIf, spliterator, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Method Detail

iterator

public abstract UnmodifiableIterator<E> iterator()

Returns an unmodifiable iterator across the elements in this collection.

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Iterable<E>

Specified by:

iterator in class AbstractCollection<E>

toArray

public final Object[] toArray()

Specified by:

toArray in interface Collection<E>

Overrides:

toArray in class AbstractCollection<E>

toArray

public final <T> T[] toArray(T[] other)

Specified by:

toArray in interface Collection<E>

Overrides:

toArray in class AbstractCollection<E>

contains

public boolean contains(@Nullable
                        Object object)

Specified by:

contains in interface Collection<E>

Overrides:

contains in class AbstractCollection<E>

add

@Deprecated
public final boolean add(E e)

Deprecated.

Unsupported operation.

Guaranteed to throw an exception and leave the collection unmodified.

Specified by:

add in interface Collection<E>

Overrides:

add in class AbstractCollection<E>

Throws:

UnsupportedOperationException - always

remove

@Deprecated
public final boolean remove(Object object)

Deprecated.

Unsupported operation.

Guaranteed to throw an exception and leave the collection unmodified.

Specified by:

remove in interface Collection<E>

Overrides:

remove in class AbstractCollection<E>

Throws:

UnsupportedOperationException - always

addAll

@Deprecated
public final boolean addAll(Collection<? extends E> newElements)

Deprecated.

Unsupported operation.

Guaranteed to throw an exception and leave the collection unmodified.

Specified by:

addAll in interface Collection<E>

Overrides:

addAll in class AbstractCollection<E>

Throws:

UnsupportedOperationException - always

removeAll

@Deprecated
public final boolean removeAll(Collection<?> oldElements)

Deprecated.

Unsupported operation.

Guaranteed to throw an exception and leave the collection unmodified.

Specified by:

removeAll in interface Collection<E>

Overrides:

removeAll in class AbstractCollection<E>

Throws:

UnsupportedOperationException - always

retainAll

@Deprecated
public final boolean retainAll(Collection<?> elementsToKeep)

Deprecated.

Unsupported operation.

Guaranteed to throw an exception and leave the collection unmodified.

Specified by:

retainAll in interface Collection<E>

Overrides:

retainAll in class AbstractCollection<E>

Throws:

UnsupportedOperationException - always

clear

@Deprecated
public final void clear()

Deprecated.

Unsupported operation.

Guaranteed to throw an exception and leave the collection unmodified.

Specified by:

clear in interface Collection<E>

Overrides:

clear in class AbstractCollection<E>

Throws:

UnsupportedOperationException - always

asList

public ImmutableList<E> asList()

Returns a list view of the collection.

Since:

2.0