Class ReferenceImmutableList<K>
- java.lang.Object
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- java.util.AbstractCollection<K>
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- it.unimi.dsi.fastutil.objects.AbstractReferenceCollection<K>
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- it.unimi.dsi.fastutil.objects.AbstractReferenceList<K>
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- it.unimi.dsi.fastutil.objects.ReferenceImmutableList<K>
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- All Implemented Interfaces:
ObjectIterable<K>
,ReferenceCollection<K>
,ReferenceList<K>
,Stack<K>
,java.io.Serializable
,java.lang.Cloneable
,java.lang.Iterable<K>
,java.util.Collection<K>
,java.util.List<K>
,java.util.RandomAccess
public class ReferenceImmutableList<K> extends AbstractReferenceList<K> implements ReferenceList<K>, java.util.RandomAccess, java.lang.Cloneable, java.io.Serializable
A type-specific array-based immutable list; provides some additional methods that use polymorphism to avoid (un)boxing.Instances of this class are immutable and (contrarily to mutable array-based list implementations) the backing array is not exposed. Instances can be built using a variety of methods, but note that constructors using an array will not make a defensive copy.
This class implements the bulk method
getElements()
using high-performance system calls (e.g.,System.arraycopy()
) instead of expensive loops.- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.objects.AbstractReferenceList
AbstractReferenceList.ReferenceRandomAccessSubList<K>, AbstractReferenceList.ReferenceSubList<K>
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Constructor Summary
Constructors Constructor Description ReferenceImmutableList(ObjectIterator<? extends K> i)
Creates a new immutable list and fills it with the elements returned by a type-specific iterator..ReferenceImmutableList(ReferenceCollection<? extends K> c)
Creates a new immutable list and fills it with a given type-specific collection.ReferenceImmutableList(ReferenceList<? extends K> l)
Creates a new immutable list and fills it with a given type-specific list.ReferenceImmutableList(java.util.Collection<? extends K> c)
Creates a new immutable list and fills it with a given collection.ReferenceImmutableList(K[] a)
Creates a new immutable list using a given array.ReferenceImmutableList(K[] a, int offset, int length)
Creates a new immutable list and fills it with the elements of a given array.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description void
add(int index, K k)
Deprecated.boolean
add(K k)
Deprecated.boolean
addAll(int index, java.util.Collection<? extends K> c)
Deprecated.boolean
addAll(java.util.Collection<? extends K> c)
Deprecated.void
addElements(int index, K[] a, int offset, int length)
Deprecated.void
clear()
Deprecated.ReferenceImmutableList<K>
clone()
boolean
equals(ReferenceImmutableList<K> l)
Compares this type-specific immutable list to another one.boolean
equals(java.lang.Object o)
void
forEach(java.util.function.Consumer<? super K> action)
K
get(int index)
void
getElements(int from, java.lang.Object[] a, int offset, int length)
Copies element of this type-specific list into the given array using optimized system calls.int
indexOf(java.lang.Object k)
boolean
isEmpty()
Checks whether the stack is empty.int
lastIndexOf(java.lang.Object k)
ObjectListIterator<K>
listIterator(int index)
Returns a type-specific list iterator on the list starting at a given index.static <K> ReferenceImmutableList<K>
of()
Returns an empty immutable list.static <K> ReferenceImmutableList<K>
of(K... init)
Creates an immutable list using a list of elements.K
remove(int index)
Deprecated.boolean
remove(java.lang.Object k)
Deprecated.boolean
removeAll(java.util.Collection<?> c)
Deprecated.void
removeElements(int from, int to)
Deprecated.boolean
removeIf(java.util.function.Predicate<? super K> c)
Deprecated.void
replaceAll(java.util.function.UnaryOperator<K> operator)
Deprecated.boolean
retainAll(java.util.Collection<?> c)
Deprecated.K
set(int index, K k)
Deprecated.void
setElements(int index, K[] a, int offset, int length)
Deprecated.int
size()
void
size(int size)
Deprecated.void
sort(java.util.Comparator<? super K> comparator)
Deprecated.ObjectSpliterator<K>
spliterator()
Returns a type-specific spliterator on the elements of this list.ReferenceList<K>
subList(int from, int to)
Returns a type-specific view of the portion of this list from the indexfrom
, inclusive, to the indexto
, exclusive.java.lang.Object[]
toArray()
<K> K[]
toArray(K[] a)
static <K> java.util.stream.Collector<K,?,ReferenceImmutableList<K>>
toList()
Returns aCollector
that collects aStream
's elements into a new ImmutableList.static <K> java.util.stream.Collector<K,?,ReferenceImmutableList<K>>
toListWithExpectedSize(int expectedSize)
Returns aCollector
that collects aStream
's elements into a new ImmutableList, potentially pre-allocated to handle the given size.void
unstableSort(java.util.Comparator<? super K> comparator)
Deprecated.-
Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractReferenceList
addElements, contains, hashCode, iterator, listIterator, peek, pop, push, top, toString
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Methods inherited from interface java.util.List
add, add, addAll, addAll, clear, contains, containsAll, hashCode, remove, remove, removeAll, replaceAll, retainAll, set
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Methods inherited from interface it.unimi.dsi.fastutil.objects.ReferenceList
addAll, addAll, addElements, addElements, iterator, listIterator, removeElements, setElements, setElements, setElements, size, sort, unstableSort
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Constructor Detail
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ReferenceImmutableList
public ReferenceImmutableList(K[] a)
Creates a new immutable list using a given array.Note that this constructor does not perform a defensive copy.
- Parameters:
a
- the array that will be used to back this immutable list.
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ReferenceImmutableList
public ReferenceImmutableList(java.util.Collection<? extends K> c)
Creates a new immutable list and fills it with a given collection.- Parameters:
c
- a collection that will be used to fill the immutable list.
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ReferenceImmutableList
public ReferenceImmutableList(ReferenceCollection<? extends K> c)
Creates a new immutable list and fills it with a given type-specific collection.- Parameters:
c
- a type-specific collection that will be used to fill the immutable list.
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ReferenceImmutableList
public ReferenceImmutableList(ReferenceList<? extends K> l)
Creates a new immutable list and fills it with a given type-specific list.- Parameters:
l
- a type-specific list that will be used to fill the immutable list.
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ReferenceImmutableList
public ReferenceImmutableList(K[] a, int offset, int length)
Creates a new immutable list and fills it with the elements of a given array.- Parameters:
a
- an array whose elements will be used to fill the immutable list.offset
- the first element to use.length
- the number of elements to use.
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ReferenceImmutableList
public ReferenceImmutableList(ObjectIterator<? extends K> i)
Creates a new immutable list and fills it with the elements returned by a type-specific iterator..- Parameters:
i
- a type-specific iterator whose returned elements will fill the immutable list.
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Method Detail
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of
public static <K> ReferenceImmutableList<K> of()
Returns an empty immutable list.- Returns:
- an immutable list (possibly shared) that is empty.
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of
@SafeVarargs public static <K> ReferenceImmutableList<K> of(K... init)
Creates an immutable list using a list of elements.Note that this method does not perform a defensive copy.
- Parameters:
init
- a list of elements that will be used to initialize the list.- Returns:
- a new immutable list containing the given elements.
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toList
public static <K> java.util.stream.Collector<K,?,ReferenceImmutableList<K>> toList()
Returns aCollector
that collects aStream
's elements into a new ImmutableList.
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toListWithExpectedSize
public static <K> java.util.stream.Collector<K,?,ReferenceImmutableList<K>> toListWithExpectedSize(int expectedSize)
Returns aCollector
that collects aStream
's elements into a new ImmutableList, potentially pre-allocated to handle the given size.
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indexOf
public int indexOf(java.lang.Object k)
- Specified by:
indexOf
in interfacejava.util.List<K>
- Overrides:
indexOf
in classAbstractReferenceList<K>
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lastIndexOf
public int lastIndexOf(java.lang.Object k)
- Specified by:
lastIndexOf
in interfacejava.util.List<K>
- Overrides:
lastIndexOf
in classAbstractReferenceList<K>
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size
public int size()
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isEmpty
public boolean isEmpty()
Description copied from interface:Stack
Checks whether the stack is empty.
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getElements
public void getElements(int from, java.lang.Object[] a, int offset, int length)
Copies element of this type-specific list into the given array using optimized system calls.- Specified by:
getElements
in interfaceReferenceList<K>
- Overrides:
getElements
in classAbstractReferenceList<K>
- Parameters:
from
- the start index (inclusive).a
- the destination array.offset
- the offset into the destination array where to store the first element copied.length
- the number of elements to be copied.
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forEach
public void forEach(java.util.function.Consumer<? super K> action)
Description copied from class:AbstractReferenceList
- Specified by:
forEach
in interfacejava.lang.Iterable<K>
- Overrides:
forEach
in classAbstractReferenceList<K>
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toArray
public java.lang.Object[] toArray()
- Specified by:
toArray
in interfacejava.util.Collection<K>
- Specified by:
toArray
in interfacejava.util.List<K>
- Overrides:
toArray
in classAbstractReferenceList<K>
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toArray
public <K> K[] toArray(K[] a)
- Specified by:
toArray
in interfacejava.util.Collection<K>
- Specified by:
toArray
in interfacejava.util.List<K>
- Overrides:
toArray
in classAbstractReferenceList<K>
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listIterator
public ObjectListIterator<K> listIterator(int index)
Description copied from class:AbstractReferenceList
Returns a type-specific list iterator on the list starting at a given index.- Specified by:
listIterator
in interfacejava.util.List<K>
- Specified by:
listIterator
in interfaceReferenceList<K>
- Overrides:
listIterator
in classAbstractReferenceList<K>
- See Also:
List.listIterator(int)
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spliterator
public ObjectSpliterator<K> spliterator()
Description copied from interface:ReferenceList
Returns a type-specific spliterator on the elements of this list.List spliterators must report at least
Spliterator.SIZED
andSpliterator.ORDERED
.See
List.spliterator()
for more documentation on the requirements of the returned spliterator.- Specified by:
spliterator
in interfacejava.util.Collection<K>
- Specified by:
spliterator
in interfacejava.lang.Iterable<K>
- Specified by:
spliterator
in interfacejava.util.List<K>
- Specified by:
spliterator
in interfaceObjectIterable<K>
- Specified by:
spliterator
in interfaceReferenceCollection<K>
- Specified by:
spliterator
in interfaceReferenceList<K>
- Returns:
- a type-specific spliterator on the elements of this collection.
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subList
public ReferenceList<K> subList(int from, int to)
Returns a type-specific view of the portion of this list from the indexfrom
, inclusive, to the indexto
, exclusive.- Specified by:
subList
in interfacejava.util.List<K>
- Specified by:
subList
in interfaceReferenceList<K>
- Overrides:
subList
in classAbstractReferenceList<K>
- See Also:
List.subList(int,int)
- API Notes:
- The returned list will be immutable, but is currently not declared to return an
instance of
ImmutableList
due to complications of implementation details. This may change in a future version (in other words, do not consider the return type of this method to be stable if making a subclass ofImmutableList
).
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clone
public ReferenceImmutableList<K> clone()
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equals
public boolean equals(ReferenceImmutableList<K> l)
Compares this type-specific immutable list to another one.- Parameters:
l
- a type-specific immutable list.- Returns:
- true if the argument contains the same elements of this type-specific immutable list.
- API Notes:
- This method exists only for sake of efficiency. The implementation inherited from the abstract implementation would already work.
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equals
public boolean equals(java.lang.Object o)
- Specified by:
equals
in interfacejava.util.Collection<K>
- Specified by:
equals
in interfacejava.util.List<K>
- Overrides:
equals
in classAbstractReferenceList<K>
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add
@Deprecated public final void add(int index, K k)
Deprecated.Description copied from class:AbstractReferenceList
- Specified by:
add
in interfacejava.util.List<K>
- Overrides:
add
in classAbstractReferenceList<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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add
@Deprecated public final boolean add(K k)
Deprecated.Description copied from class:AbstractReferenceList
- Specified by:
add
in interfacejava.util.Collection<K>
- Specified by:
add
in interfacejava.util.List<K>
- Overrides:
add
in classAbstractReferenceList<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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addAll
@Deprecated public final boolean addAll(java.util.Collection<? extends K> c)
Deprecated.Description copied from class:AbstractReferenceList
- Specified by:
addAll
in interfacejava.util.Collection<K>
- Specified by:
addAll
in interfacejava.util.List<K>
- Overrides:
addAll
in classAbstractReferenceList<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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addAll
@Deprecated public final boolean addAll(int index, java.util.Collection<? extends K> c)
Deprecated.Description copied from class:AbstractReferenceList
Adds all of the elements in the specified collection to this list (optional operation).- Specified by:
addAll
in interfacejava.util.List<K>
- Overrides:
addAll
in classAbstractReferenceList<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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remove
@Deprecated public final K remove(int index)
Deprecated.Description copied from class:AbstractReferenceList
- Specified by:
remove
in interfacejava.util.List<K>
- Overrides:
remove
in classAbstractReferenceList<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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remove
@Deprecated public final boolean remove(java.lang.Object k)
Deprecated.- Specified by:
remove
in interfacejava.util.Collection<K>
- Specified by:
remove
in interfacejava.util.List<K>
- Overrides:
remove
in classjava.util.AbstractCollection<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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removeAll
@Deprecated public final boolean removeAll(java.util.Collection<?> c)
Deprecated.- Specified by:
removeAll
in interfacejava.util.Collection<K>
- Specified by:
removeAll
in interfacejava.util.List<K>
- Overrides:
removeAll
in classjava.util.AbstractCollection<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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retainAll
@Deprecated public final boolean retainAll(java.util.Collection<?> c)
Deprecated.- Specified by:
retainAll
in interfacejava.util.Collection<K>
- Specified by:
retainAll
in interfacejava.util.List<K>
- Overrides:
retainAll
in classjava.util.AbstractCollection<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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removeIf
@Deprecated public final boolean removeIf(java.util.function.Predicate<? super K> c)
Deprecated.- Specified by:
removeIf
in interfacejava.util.Collection<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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replaceAll
@Deprecated public final void replaceAll(java.util.function.UnaryOperator<K> operator)
Deprecated.- Specified by:
replaceAll
in interfacejava.util.List<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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set
@Deprecated public final K set(int index, K k)
Deprecated.Description copied from class:AbstractReferenceList
- Specified by:
set
in interfacejava.util.List<K>
- Overrides:
set
in classAbstractReferenceList<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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clear
@Deprecated public final void clear()
Deprecated.Description copied from class:AbstractReferenceList
- Specified by:
clear
in interfacejava.util.Collection<K>
- Specified by:
clear
in interfacejava.util.List<K>
- Overrides:
clear
in classAbstractReferenceList<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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size
@Deprecated public final void size(int size)
Deprecated.Description copied from interface:ReferenceList
Sets the size of this list.If the specified size is smaller than the current size, the last elements are discarded. Otherwise, they are filled with 0/
null
/false
.- Specified by:
size
in interfaceReferenceList<K>
- Overrides:
size
in classAbstractReferenceList<K>
- Parameters:
size
- the new size.- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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removeElements
@Deprecated public final void removeElements(int from, int to)
Deprecated.Description copied from class:AbstractReferenceList
Removes (hopefully quickly) elements of this type-specific list.This is a trivial iterator-based based implementation. It is expected that implementations will override this method with a more optimized version.
- Specified by:
removeElements
in interfaceReferenceList<K>
- Overrides:
removeElements
in classAbstractReferenceList<K>
- Parameters:
from
- the start index (inclusive).to
- the end index (exclusive).- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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addElements
@Deprecated public final void addElements(int index, K[] a, int offset, int length)
Deprecated.Description copied from class:AbstractReferenceList
Add (hopefully quickly) elements to this type-specific list.This is a trivial iterator-based implementation. It is expected that implementations will override this method with a more optimized version.
- Specified by:
addElements
in interfaceReferenceList<K>
- Overrides:
addElements
in classAbstractReferenceList<K>
- Parameters:
index
- the index at which to add elements.a
- the array containing the elements.offset
- the offset of the first element to add.length
- the number of elements to add.- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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setElements
@Deprecated public final void setElements(int index, K[] a, int offset, int length)
Deprecated.Description copied from interface:ReferenceList
Set (hopefully quickly) elements to match the array given. Sets each in this list to the corresponding elements in the array, as if by
However, the exact implementation may be more efficient, taking into account whether random access is faster or not, or at the discretion of subclasses, abuse internals.ListIterator iter = listIterator(index); int i = 0; while (i < length) { iter.next(); iter.set(a[offset + i++]); }
- Specified by:
setElements
in interfaceReferenceList<K>
- Overrides:
setElements
in classAbstractReferenceList<K>
- Parameters:
index
- the index at which to start setting elements.a
- the array containing the elementsoffset
- the offset of the first element to add.length
- the number of elements to add.- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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sort
@Deprecated public final void sort(java.util.Comparator<? super K> comparator)
Deprecated.Description copied from interface:ReferenceList
Sorts this list using a sort assured to be stable.Pass
null
to sort using natural ordering.Unless a subclass specifies otherwise, the results of the method if the list is concurrently modified during the sort are unspecified.
- Specified by:
sort
in interfacejava.util.List<K>
- Specified by:
sort
in interfaceReferenceList<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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unstableSort
@Deprecated public final void unstableSort(java.util.Comparator<? super K> comparator)
Deprecated.Description copied from interface:ReferenceList
Sorts this list using a sort not assured to be stable. This differs fromList.sort(java.util.Comparator)
in that the results are not assured to be stable, but may be a bit faster.Pass
null
to sort using natural ordering.Unless a subclass specifies otherwise, the results of the method if the list is concurrently modified during the sort are unspecified.
- Specified by:
unstableSort
in interfaceReferenceList<K>
- Implementation Specification:
- Always throws
UnsupportedOperationException
as this is an immutable type.
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