Package com.carrotsearch.hppc
Class LongLongHashMap.KeysContainer
- java.lang.Object
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- com.carrotsearch.hppc.LongLongHashMap.KeysContainer
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- All Implemented Interfaces:
LongCollection
,LongContainer
,LongLookupContainer
,java.lang.Iterable<LongCursor>
- Enclosing class:
- LongLongHashMap
public final class LongLongHashMap.KeysContainer extends java.lang.Object implements LongLookupContainer
A view of the keys inside this hash map.
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Constructor Summary
Constructors Constructor Description KeysContainer()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Removes all elements from this collection.boolean
contains(long e)
Lookup a given element in the container.<T extends LongProcedure>
TforEach(T procedure)
Applies aprocedure
to all container elements.boolean
isEmpty()
Shortcut forsize() == 0
.java.util.Iterator<LongCursor>
iterator()
Returns an iterator to a cursor traversing the collection.void
release()
Removes all elements from the collection and additionally releases any internal buffers.int
removeAll(long e)
Removes all occurrences ofe
from this collection.int
removeAll(LongLookupContainer c)
Default implementation uses a predicate for removal.int
removeAll(LongPredicate predicate)
Removes all elements in this collection for which the given predicate returnstrue
.int
retainAll(LongLookupContainer c)
Default implementation uses a predicate for retaining.int
retainAll(LongPredicate predicate)
Default implementation redirects toLongCollection.removeAll(LongPredicate)
and negates the predicate.int
size()
Return the current number of elements in this container.long[]
toArray()
Default implementation of copying to an array.java.lang.String
toString()
Convert the contents of this container to a human-friendly string.-
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface com.carrotsearch.hppc.LongContainer
toArray
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Method Detail
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contains
public boolean contains(long e)
Description copied from interface:LongContainer
Lookup a given element in the container. This operation has no speed guarantees (may be linear with respect to the size of this container).- Specified by:
contains
in interfaceLongContainer
- Specified by:
contains
in interfaceLongLookupContainer
- Returns:
- Returns
true
if this container has an element equal toe
.
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forEach
public <T extends LongProcedure> T forEach(T procedure)
Description copied from interface:LongContainer
Applies aprocedure
to all container elements. Returns the argument (any subclass ofLongProcedure
. This lets the caller to call methods of the argument by chaining the call (even if the argument is an anonymous type) to retrieve computed values, for example (IntContainer):int count = container.forEach(new IntProcedure() { int count; // this is a field declaration in an anonymous class. public void apply(int value) { count++; } }).count;
- Specified by:
forEach
in interfaceLongContainer
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forEach
public <T extends LongPredicate> T forEach(T predicate)
Description copied from interface:LongContainer
Applies apredicate
to container elements as long, as the predicate returnstrue
. The iteration is interrupted otherwise.- Specified by:
forEach
in interfaceLongContainer
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isEmpty
public boolean isEmpty()
Description copied from interface:LongContainer
Shortcut forsize() == 0
.- Specified by:
isEmpty
in interfaceLongContainer
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iterator
public java.util.Iterator<LongCursor> iterator()
Description copied from interface:LongContainer
Returns an iterator to a cursor traversing the collection. The order of traversal is not defined. More than one cursor may be active at a time. The behavior of iterators is undefined if structural changes are made to the underlying collection.The iterator is implemented as a cursor and it returns the same cursor instance on every call to
Iterator.next()
(to avoid boxing of primitive types). To read the current list's value (or index in the list) use the cursor's public fields. An example is shown below.for (LongCursor<long> c : container) { System.out.println("index=" + c.index + " value=" + c.value); }
- Specified by:
iterator
in interfacejava.lang.Iterable<LongCursor>
- Specified by:
iterator
in interfaceLongContainer
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size
public int size()
Description copied from interface:LongContainer
Return the current number of elements in this container. The time for calculating the container's size may takeO(n)
time, although implementing classes should try to maintain the current size and return in constant time.- Specified by:
size
in interfaceLongContainer
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clear
public void clear()
Description copied from interface:LongCollection
Removes all elements from this collection.- Specified by:
clear
in interfaceLongCollection
- See Also:
LongCollection.release()
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release
public void release()
Description copied from interface:LongCollection
Removes all elements from the collection and additionally releases any internal buffers. Typically, if the object is to be reused, a simpleLongCollection.clear()
should be a better alternative since it'll avoid reallocation.- Specified by:
release
in interfaceLongCollection
- See Also:
LongCollection.clear()
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removeAll
public int removeAll(LongPredicate predicate)
Description copied from interface:LongCollection
Removes all elements in this collection for which the given predicate returnstrue
.- Specified by:
removeAll
in interfaceLongCollection
- Returns:
- Returns the number of removed elements.
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removeAll
public int removeAll(long e)
Description copied from interface:LongCollection
Removes all occurrences ofe
from this collection.- Specified by:
removeAll
in interfaceLongCollection
- Parameters:
e
- Element to be removed from this collection, if present.- Returns:
- The number of removed elements as a result of this call.
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removeAll
public int removeAll(LongLookupContainer c)
Default implementation uses a predicate for removal.- Specified by:
removeAll
in interfaceLongCollection
- Returns:
- Returns the number of removed elements.
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retainAll
public int retainAll(LongLookupContainer c)
Default implementation uses a predicate for retaining.- Specified by:
retainAll
in interfaceLongCollection
- Returns:
- Returns the number of removed elements.
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retainAll
public int retainAll(LongPredicate predicate)
Default implementation redirects toLongCollection.removeAll(LongPredicate)
and negates the predicate.- Specified by:
retainAll
in interfaceLongCollection
- Returns:
- Returns the number of removed elements.
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toArray
public long[] toArray()
Default implementation of copying to an array.- Specified by:
toArray
in interfaceLongContainer
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toString
public java.lang.String toString()
Convert the contents of this container to a human-friendly string.- Overrides:
toString
in classjava.lang.Object
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