Class SingletonView<E>
- java.lang.Object
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- one.microstream.collections.SingletonView<E>
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- All Implemented Interfaces:
Iterable<E>
,CapacityCarrying
,ExtendedBag<E>
,ExtendedCollection<E>
,ExtendedList<E>
,ExtendedSequence<E>
,Sized
,XGettingBag<E>
,XGettingCollection<E>
,XGettingEnum<E>
,XGettingList<E>
,XGettingSequence<E>
,XGettingSet<E>
,XIndexIterable<E>
,XIterable<E>
,XJoinable<E>
,XReferencing<E>
,Referencing<E>
,Copyable
public class SingletonView<E> extends Object implements XReferencing<E>
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Nested Class Summary
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Nested classes/interfaces inherited from interface one.microstream.typing.Copyable
Copyable.Static
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Nested classes/interfaces inherited from interface one.microstream.collections.interfaces.ExtendedCollection
ExtendedCollection.Creator<E,C extends ExtendedCollection<E>>
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Nested classes/interfaces inherited from interface one.microstream.collections.types.XGettingCollection
XGettingCollection.Creator<E>
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Nested classes/interfaces inherited from interface one.microstream.collections.types.XGettingEnum
XGettingEnum.Creator<E>
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Nested classes/interfaces inherited from interface one.microstream.collections.types.XGettingList
XGettingList.Factory<E>
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Nested classes/interfaces inherited from interface one.microstream.collections.types.XGettingSequence
XGettingSequence.Factory<E>
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Nested classes/interfaces inherited from interface one.microstream.collections.types.XIterable
XIterable.Executor<E>
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Constructor Summary
Constructors Constructor Description SingletonView(Singleton<E> subject)
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Method Summary
Modifier and Type Method Description boolean
applies(Predicate<? super E> predicate)
E
at(long index)
boolean
contains(E element)
boolean
containsAll(XGettingCollection<? extends E> elements)
boolean
containsId(E element)
Special version of contains() that guarantees to use identity comparison (" == ") when searching for the given element regardless of the collection's internal logic.
This method has the same behavior asXGettingCollection.containsSearched(Predicate)
with aPredicate
implementation that checks for object identity.boolean
containsSearched(Predicate<? super E> predicate)
SingletonView<E>
copy()
Creates a true copy of this list which references th same elements in the same order as this list does at the time the method is called.<T extends Consumer<? super E>>
TcopySelection(T target, long... indices)
<T extends Consumer<? super E>>
TcopyTo(T target)
long
count(E element)
long
countBy(Predicate<? super E> predicate)
<T extends Consumer<? super E>>
Tdistinct(T target)
<T extends Consumer<? super E>>
Tdistinct(T target, Equalator<? super E> equalator)
Equalator<? super E>
equality()
boolean
equals(Object obj)
Performs an equality comparison according to the specification inCollection
.boolean
equals(XGettingCollection<? extends E> samples, Equalator<? super E> equalator)
Returnstrue
if the passed collection is of the same type as this collection andthis.equalsContent(list, equalator)
yieldstrue
.boolean
equalsContent(XGettingCollection<? extends E> samples, Equalator<? super E> equalator)
Returnstrue
if all elements of this list and the passed list are sequentially equal as defined by the passed equalator.<T extends Consumer<? super E>>
Texcept(XGettingCollection<? extends E> other, Equalator<? super E> equalator, T target)
<T extends Consumer<? super E>>
TfilterTo(T target, Predicate<? super E> predicate)
E
first()
E
get()
Gets the first element in the collection.int
hashCode()
boolean
hasVolatileElements()
Tells if this collection contains volatile elements.
An element is volatile, if it can become no longer reachable by the collection without being removed from the collection.Constant<E>
immure()
Provides an instance of an immutable collection type with equal behavior and data as this instance.long
indexBy(Predicate<? super E> predicate)
long
indexOf(E element)
<T extends Consumer<? super E>>
Tintersect(XGettingCollection<? extends E> other, Equalator<? super E> equalator, T target)
boolean
isEmpty()
boolean
isFull()
Returns true if the current capacity cannot be increased any more.boolean
isSorted(Comparator<? super E> comparator)
<P extends Consumer<? super E>>
Piterate(P procedure)
<P extends IndexedAcceptor<? super E>>
PiterateIndexed(P procedure)
Iterator<E>
iterator()
<A> A
join(BiConsumer<? super E,? super A> joiner, A aggregate)
E
last()
long
lastIndexBy(Predicate<? super E> predicate)
long
lastIndexOf(E element)
ListIterator<E>
listIterator()
ListIterator<E>
listIterator(long index)
E
max(Comparator<? super E> comparator)
long
maximumCapacity()
Returns the maximum amount of elements this carrier instance can contain.
The actual value may be depend on the configuration of the concrete instance or may depend only on the implementation of the carrier (meaning it is constant for all instances of the implementation, e.g.long
maxIndex(Comparator<? super E> comparator)
E
min(Comparator<? super E> comparator)
long
minIndex(Comparator<? super E> comparator)
boolean
nullAllowed()
boolean
nullContained()
one.microstream.collections.Singleton.OldSingleton
old()
E
peek()
E
poll()
SingletonView<E>
range(long fromIndex, long toIndex)
long
remainingCapacity()
Returns the amount of elements this carrier instance can collect before reaching its maximimum capacity.long
scan(Predicate<? super E> predicate)
Iterates through the collection and returns the index of the last element that the passedPredicate
applied to ("scanning").E
search(Predicate<? super E> predicate)
E
seek(E sample)
Returns the first contained element matching the passed sample as defined by the collection's equality logic or null, if no fitting element is contained.long
size()
Object[]
toArray()
E[]
toArray(Class<E> type)
SingletonView<E>
toReversed()
String
toString()
<T extends Consumer<? super E>>
Tunion(XGettingCollection<? extends E> other, Equalator<? super E> equalator, T target)
SingletonView<E>
view()
SingletonView<E>
view(long lowIndex, long highIndex)
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface java.lang.Iterable
forEach, spliterator
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Methods inherited from interface one.microstream.collections.types.XGettingCollection
intSize
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Methods inherited from interface one.microstream.collections.types.XGettingSequence
hasIndex
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Method Detail
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hashCode
public int hashCode()
- Specified by:
hashCode
in interfaceXGettingCollection<E>
- Overrides:
hashCode
in classObject
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get
public E get()
Description copied from interface:XGettingSequence
Gets the first element in the collection. This is a parameterless alias vorat(0)
.first() is an alias for this method for consistency reasons with last()
.- Specified by:
get
in interfaceReferencing<E>
- Specified by:
get
in interfaceXGettingCollection<E>
- Specified by:
get
in interfaceXGettingSequence<E>
- Specified by:
get
in interfaceXReferencing<E>
- Returns:
- the first element.
- See Also:
XGettingSequence.at(long)
,XGettingSequence.first()
,XGettingSequence.last()
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copy
public SingletonView<E> copy()
Description copied from interface:XGettingSequence
Creates a true copy of this list which references th same elements in the same order as this list does at the time the method is called. The elements themselves are NOT copied (no deep copying).
The type of the returned list is the same as of this list if possible (i.e.: a SubList can not meaningful return a true copy that references its elements but still is a SubList)- Specified by:
copy
in interfaceCopyable
- Specified by:
copy
in interfaceXGettingBag<E>
- Specified by:
copy
in interfaceXGettingCollection<E>
- Specified by:
copy
in interfaceXGettingEnum<E>
- Specified by:
copy
in interfaceXGettingList<E>
- Specified by:
copy
in interfaceXGettingSequence<E>
- Specified by:
copy
in interfaceXGettingSet<E>
- Specified by:
copy
in interfaceXReferencing<E>
- Returns:
- a copy of this list
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iterate
public final <P extends Consumer<? super E>> P iterate(P procedure)
- Specified by:
iterate
in interfaceXGettingEnum<E>
- Specified by:
iterate
in interfaceXGettingSet<E>
- Specified by:
iterate
in interfaceXIterable<E>
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iterateIndexed
public final <P extends IndexedAcceptor<? super E>> P iterateIndexed(P procedure)
- Specified by:
iterateIndexed
in interfaceXIndexIterable<E>
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join
public final <A> A join(BiConsumer<? super E,? super A> joiner, A aggregate)
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immure
public Constant<E> immure()
Description copied from interface:XGettingList
Provides an instance of an immutable collection type with equal behavior and data as this instance.If this instance already is of an immutable collection type, it returns itself.
- Specified by:
immure
in interfaceXGettingBag<E>
- Specified by:
immure
in interfaceXGettingCollection<E>
- Specified by:
immure
in interfaceXGettingEnum<E>
- Specified by:
immure
in interfaceXGettingList<E>
- Specified by:
immure
in interfaceXGettingSequence<E>
- Specified by:
immure
in interfaceXGettingSet<E>
- Specified by:
immure
in interfaceXReferencing<E>
- Returns:
- an immutable copy of this collection instance.
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listIterator
public ListIterator<E> listIterator()
- Specified by:
listIterator
in interfaceXGettingList<E>
- Specified by:
listIterator
in interfaceXReferencing<E>
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equals
public boolean equals(Object obj)
Description copied from interface:XGettingCollection
Performs an equality comparison according to the specification inCollection
.Note that it is this interface's author opinion that the whole concept of equals() in standard Java, especially in the collection implementations, is flawed.
The reason is because all different kinds of comparison types that actually depend on the situation have to be mixed up in a harcoded fashion in one method, from identity comparison over data indentity comparison to content comparison.
In order to get the right behavior in every situation, one has to distinct between different types of equality
This means several things:
1.) You can't just say for example an ArrayList is the "same" as a LinkedList just because they contain the same content.
There are different implementations for a good reason, so you have to distinct them when comparing. There are simple code examples which create massive misbehavior that will catastrophically ruin the runtime behavior of a programm due to this error in Java / JDK / Sun / whatever.
2.) You can't always determine equality of two collections by determining equality of each element asCollection
defines it.As a conclusion: don't use this method!
Be clear what type of comparison you really need, then use one of the following methods and proper comparators:
XGettingCollection.equals(XGettingCollection,Equalator)
XGettingCollection.equalsContent(XGettingCollection,Equalator)
- Specified by:
equals
in interfaceXGettingCollection<E>
- Overrides:
equals
in classObject
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listIterator
public ListIterator<E> listIterator(long index)
- Specified by:
listIterator
in interfaceXGettingList<E>
- Specified by:
listIterator
in interfaceXReferencing<E>
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old
public one.microstream.collections.Singleton.OldSingleton old()
- Specified by:
old
in interfaceXGettingCollection<E>
- Specified by:
old
in interfaceXGettingList<E>
- Specified by:
old
in interfaceXReferencing<E>
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range
public SingletonView<E> range(long fromIndex, long toIndex)
- Specified by:
range
in interfaceXGettingEnum<E>
- Specified by:
range
in interfaceXGettingList<E>
- Specified by:
range
in interfaceXGettingSequence<E>
- Specified by:
range
in interfaceXReferencing<E>
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toReversed
public SingletonView<E> toReversed()
- Specified by:
toReversed
in interfaceXGettingEnum<E>
- Specified by:
toReversed
in interfaceXGettingList<E>
- Specified by:
toReversed
in interfaceXGettingSequence<E>
- Specified by:
toReversed
in interfaceXReferencing<E>
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copySelection
public <T extends Consumer<? super E>> T copySelection(T target, long... indices)
- Specified by:
copySelection
in interfaceXGettingSequence<E>
- Specified by:
copySelection
in interfaceXReferencing<E>
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first
public E first()
- Specified by:
first
in interfaceXGettingSequence<E>
- Specified by:
first
in interfaceXReferencing<E>
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at
public E at(long index)
- Specified by:
at
in interfaceXGettingSequence<E>
- Specified by:
at
in interfaceXReferencing<E>
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indexOf
public long indexOf(E element)
- Specified by:
indexOf
in interfaceXGettingSequence<E>
- Specified by:
indexOf
in interfaceXReferencing<E>
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indexBy
public long indexBy(Predicate<? super E> predicate)
- Specified by:
indexBy
in interfaceXGettingSequence<E>
- Specified by:
indexBy
in interfaceXReferencing<E>
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isSorted
public boolean isSorted(Comparator<? super E> comparator)
- Specified by:
isSorted
in interfaceXGettingSequence<E>
- Specified by:
isSorted
in interfaceXReferencing<E>
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last
public E last()
- Specified by:
last
in interfaceXGettingSequence<E>
- Specified by:
last
in interfaceXReferencing<E>
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lastIndexOf
public long lastIndexOf(E element)
- Specified by:
lastIndexOf
in interfaceXGettingSequence<E>
- Specified by:
lastIndexOf
in interfaceXReferencing<E>
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lastIndexBy
public long lastIndexBy(Predicate<? super E> predicate)
- Specified by:
lastIndexBy
in interfaceXGettingSequence<E>
- Specified by:
lastIndexBy
in interfaceXReferencing<E>
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maxIndex
public long maxIndex(Comparator<? super E> comparator)
- Specified by:
maxIndex
in interfaceXGettingSequence<E>
- Specified by:
maxIndex
in interfaceXReferencing<E>
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minIndex
public long minIndex(Comparator<? super E> comparator)
- Specified by:
minIndex
in interfaceXGettingSequence<E>
- Specified by:
minIndex
in interfaceXReferencing<E>
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peek
public E peek()
- Specified by:
peek
in interfaceXGettingSequence<E>
- Specified by:
peek
in interfaceXReferencing<E>
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poll
public E poll()
- Specified by:
poll
in interfaceXGettingSequence<E>
- Specified by:
poll
in interfaceXReferencing<E>
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scan
public long scan(Predicate<? super E> predicate)
Description copied from interface:XGettingSequence
Iterates through the collection and returns the index of the last element that the passedPredicate
applied to ("scanning").- Specified by:
scan
in interfaceXGettingSequence<E>
- Specified by:
scan
in interfaceXReferencing<E>
- Returns:
- the index of the last positively tested element.
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view
public SingletonView<E> view()
- Specified by:
view
in interfaceXGettingBag<E>
- Specified by:
view
in interfaceXGettingCollection<E>
- Specified by:
view
in interfaceXGettingEnum<E>
- Specified by:
view
in interfaceXGettingList<E>
- Specified by:
view
in interfaceXGettingSequence<E>
- Specified by:
view
in interfaceXReferencing<E>
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view
public SingletonView<E> view(long lowIndex, long highIndex)
- Specified by:
view
in interfaceXGettingEnum<E>
- Specified by:
view
in interfaceXGettingList<E>
- Specified by:
view
in interfaceXGettingSequence<E>
- Specified by:
view
in interfaceXReferencing<E>
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containsSearched
public boolean containsSearched(Predicate<? super E> predicate)
- Specified by:
containsSearched
in interfaceXGettingCollection<E>
- Specified by:
containsSearched
in interfaceXReferencing<E>
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applies
public boolean applies(Predicate<? super E> predicate)
- Specified by:
applies
in interfaceXGettingCollection<E>
- Specified by:
applies
in interfaceXReferencing<E>
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contains
public boolean contains(E element)
- Specified by:
contains
in interfaceXGettingCollection<E>
- Specified by:
contains
in interfaceXReferencing<E>
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containsAll
public boolean containsAll(XGettingCollection<? extends E> elements)
- Specified by:
containsAll
in interfaceXGettingCollection<E>
- Specified by:
containsAll
in interfaceXReferencing<E>
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containsId
public boolean containsId(E element)
Description copied from interface:XGettingCollection
Special version of contains() that guarantees to use identity comparison (" == ") when searching for the given element regardless of the collection's internal logic.
This method has the same behavior asXGettingCollection.containsSearched(Predicate)
with aPredicate
implementation that checks for object identity. The only difference is a performance and usability advantage- Specified by:
containsId
in interfaceXGettingCollection<E>
- Specified by:
containsId
in interfaceXReferencing<E>
- Parameters:
element
- the element to be searched in the collection by identity.- Returns:
- whether this collection contains exactely the given element.
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copyTo
public <T extends Consumer<? super E>> T copyTo(T target)
- Specified by:
copyTo
in interfaceXGettingCollection<E>
- Specified by:
copyTo
in interfaceXReferencing<E>
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filterTo
public <T extends Consumer<? super E>> T filterTo(T target, Predicate<? super E> predicate)
- Specified by:
filterTo
in interfaceXGettingCollection<E>
- Specified by:
filterTo
in interfaceXReferencing<E>
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count
public long count(E element)
- Specified by:
count
in interfaceXGettingCollection<E>
- Specified by:
count
in interfaceXReferencing<E>
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countBy
public long countBy(Predicate<? super E> predicate)
- Specified by:
countBy
in interfaceXGettingCollection<E>
- Specified by:
countBy
in interfaceXReferencing<E>
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distinct
public <T extends Consumer<? super E>> T distinct(T target)
- Specified by:
distinct
in interfaceXGettingCollection<E>
- Specified by:
distinct
in interfaceXReferencing<E>
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distinct
public <T extends Consumer<? super E>> T distinct(T target, Equalator<? super E> equalator)
- Specified by:
distinct
in interfaceXGettingCollection<E>
- Specified by:
distinct
in interfaceXReferencing<E>
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equality
public Equalator<? super E> equality()
- Specified by:
equality
in interfaceXGettingCollection<E>
- Specified by:
equality
in interfaceXReferencing<E>
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equals
public boolean equals(XGettingCollection<? extends E> samples, Equalator<? super E> equalator)
Description copied from interface:XGettingCollection
Returnstrue
if the passed collection is of the same type as this collection andthis.equalsContent(list, equalator)
yieldstrue
.- Specified by:
equals
in interfaceXGettingCollection<E>
- Specified by:
equals
in interfaceXReferencing<E>
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equalsContent
public boolean equalsContent(XGettingCollection<? extends E> samples, Equalator<? super E> equalator)
Description copied from interface:XGettingCollection
Returnstrue
if all elements of this list and the passed list are sequentially equal as defined by the passed equalator.Note that for colletion types that don't have a defined order of elements, this method is hardly usable (as is
XGettingCollection.equals(Object)
for them as defined inCollection
). The core problem of comparing collections that have no defined order is that they aren't really reliably comparable to any other collection.- Specified by:
equalsContent
in interfaceXGettingCollection<E>
- Specified by:
equalsContent
in interfaceXReferencing<E>
equalator
- the equalator to use to determine the equality of each element- Returns:
true
if this list is equal to the passed list, false otherwise
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except
public <T extends Consumer<? super E>> T except(XGettingCollection<? extends E> other, Equalator<? super E> equalator, T target)
- Specified by:
except
in interfaceXGettingCollection<E>
- Specified by:
except
in interfaceXReferencing<E>
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hasVolatileElements
public boolean hasVolatileElements()
Description copied from interface:XGettingCollection
Tells if this collection contains volatile elements.
An element is volatile, if it can become no longer reachable by the collection without being removed from the collection. Examples areWeakReference
ofSoftReference
or implementations of collection entries that remove the element contained in an entry by some means outside the collection.
Note thatWeakReference
instances that are added to a a simple (non-volatile) implementation of a collection do NOT make the collection volatile, as the elements themselves (the reference instances) are still strongly referenced.- Specified by:
hasVolatileElements
in interfaceExtendedCollection<E>
- Specified by:
hasVolatileElements
in interfaceXGettingCollection<E>
- Specified by:
hasVolatileElements
in interfaceXReferencing<E>
- Returns:
true
if the collection contains volatile elements.
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intersect
public <T extends Consumer<? super E>> T intersect(XGettingCollection<? extends E> other, Equalator<? super E> equalator, T target)
- Specified by:
intersect
in interfaceXGettingCollection<E>
- Specified by:
intersect
in interfaceXReferencing<E>
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isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interfaceSized
- Specified by:
isEmpty
in interfaceXReferencing<E>
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iterator
public Iterator<E> iterator()
- Specified by:
iterator
in interfaceIterable<E>
- Specified by:
iterator
in interfaceXGettingCollection<E>
- Specified by:
iterator
in interfaceXReferencing<E>
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max
public E max(Comparator<? super E> comparator)
- Specified by:
max
in interfaceXGettingCollection<E>
- Specified by:
max
in interfaceXReferencing<E>
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min
public E min(Comparator<? super E> comparator)
- Specified by:
min
in interfaceXGettingCollection<E>
- Specified by:
min
in interfaceXReferencing<E>
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nullContained
public boolean nullContained()
- Specified by:
nullContained
in interfaceXGettingCollection<E>
- Specified by:
nullContained
in interfaceXReferencing<E>
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seek
public E seek(E sample)
Description copied from interface:XGettingCollection
Returns the first contained element matching the passed sample as defined by the collection's equality logic or null, if no fitting element is contained. (For collections using referential equality, this method is basically just a variation ofXGettingCollection.contains(Object)
with a different return type. For collections with data-dependant equality, the returned element might be the same as the passed one or a data-wise equal one, depending on the content of the collection)- Specified by:
seek
in interfaceXGettingCollection<E>
- Specified by:
seek
in interfaceXReferencing<E>
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search
public E search(Predicate<? super E> predicate)
- Specified by:
search
in interfaceXGettingCollection<E>
- Specified by:
search
in interfaceXReferencing<E>
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size
public long size()
- Specified by:
size
in interfaceSized
- Specified by:
size
in interfaceXGettingCollection<E>
- Specified by:
size
in interfaceXReferencing<E>
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toArray
public Object[] toArray()
- Specified by:
toArray
in interfaceXGettingCollection<E>
- Specified by:
toArray
in interfaceXReferencing<E>
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toArray
public E[] toArray(Class<E> type)
- Specified by:
toArray
in interfaceXGettingCollection<E>
- Specified by:
toArray
in interfaceXReferencing<E>
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union
public <T extends Consumer<? super E>> T union(XGettingCollection<? extends E> other, Equalator<? super E> equalator, T target)
- Specified by:
union
in interfaceXGettingCollection<E>
- Specified by:
union
in interfaceXReferencing<E>
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nullAllowed
public boolean nullAllowed()
- Specified by:
nullAllowed
in interfaceExtendedCollection<E>
- Specified by:
nullAllowed
in interfaceXReferencing<E>
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remainingCapacity
public long remainingCapacity()
Description copied from interface:CapacityCarrying
Returns the amount of elements this carrier instance can collect before reaching its maximimum capacity.- Specified by:
remainingCapacity
in interfaceCapacityCarrying
- Specified by:
remainingCapacity
in interfaceXReferencing<E>
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isFull
public boolean isFull()
Description copied from interface:CapacityCarrying
Returns true if the current capacity cannot be increased any more.- Specified by:
isFull
in interfaceCapacityCarrying
- Specified by:
isFull
in interfaceXReferencing<E>
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maximumCapacity
public long maximumCapacity()
Description copied from interface:CapacityCarrying
Returns the maximum amount of elements this carrier instance can contain.
The actual value may be depend on the configuration of the concrete instance or may depend only on the implementation of the carrier (meaning it is constant for all instances of the implementation, e.g.Integer.MAX_VALUE
)- Specified by:
maximumCapacity
in interfaceCapacityCarrying
- Specified by:
maximumCapacity
in interfaceXReferencing<E>
- Returns:
- the maximum amount of elements this carrier instance can contain.
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-