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java.lang.Object org.omnifaces.util.concurrentlinkedhashmap.Weighers
public final class Weighers
A common set of Weigher
and EntryWeigher
implementations.
Method Summary | ||
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static
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asEntryWeigher(Weigher<? super V> weigher)
A entry weigher backed by the specified weigher. |
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static Weigher<byte[]> |
byteArray()
A weigher where the value is a byte array and its weight is the number of bytes. |
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static
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collection()
A weigher where the value is a Collection and its weight is the
number of elements. |
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static
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entrySingleton()
A weigher where an entry has a weight of 1. |
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static
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iterable()
A weigher where the value is a Iterable and its weight is the
number of elements. |
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static
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list()
A weigher where the value is a List and its weight is the number
of elements. |
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static
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map()
A weigher where the value is a Map and its weight is the number of
entries. |
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static
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set()
A weigher where the value is a Set and its weight is the number
of elements. |
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static
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singleton()
A weigher where a value has a weight of 1. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public static <K,V> EntryWeigher<K,V> asEntryWeigher(Weigher<? super V> weigher)
weigher
- the weigher to be "wrapped" in a entry weigher.
public static <K,V> EntryWeigher<K,V> entrySingleton()
public static <V> Weigher<V> singleton()
public static Weigher<byte[]> byteArray()
A value with a weight of 0 will be rejected by the map. If a value with this weight can occur then the caller should eagerly evaluate the value and treat it as a removal operation. Alternatively, a custom weigher may be specified on the map to assign an empty value a positive weight.
public static <E> Weigher<? super java.lang.Iterable<E>> iterable()
Iterable
and its weight is the
number of elements. This weigher only should be used when the alternative
collection()
weigher cannot be, as evaluation takes O(n) time. A
map bounded with this weigher will evict when the total number of elements
exceeds the capacity rather than the number of key-value pairs in the map.
A value with a weight of 0 will be rejected by the map. If a value with this weight can occur then the caller should eagerly evaluate the value and treat it as a removal operation. Alternatively, a custom weigher may be specified on the map to assign an empty value a positive weight.
public static <E> Weigher<? super java.util.Collection<E>> collection()
Collection
and its weight is the
number of elements. A map bounded with this weigher will evict when the
total number of elements exceeds the capacity rather than the number of
key-value pairs in the map.
A value with a weight of 0 will be rejected by the map. If a value with this weight can occur then the caller should eagerly evaluate the value and treat it as a removal operation. Alternatively, a custom weigher may be specified on the map to assign an empty value a positive weight.
public static <E> Weigher<? super java.util.List<E>> list()
List
and its weight is the number
of elements. A map bounded with this weigher will evict when the total
number of elements exceeds the capacity rather than the number of
key-value pairs in the map.
A value with a weight of 0 will be rejected by the map. If a value with this weight can occur then the caller should eagerly evaluate the value and treat it as a removal operation. Alternatively, a custom weigher may be specified on the map to assign an empty value a positive weight.
public static <E> Weigher<? super java.util.Set<E>> set()
Set
and its weight is the number
of elements. A map bounded with this weigher will evict when the total
number of elements exceeds the capacity rather than the number of
key-value pairs in the map.
A value with a weight of 0 will be rejected by the map. If a value with this weight can occur then the caller should eagerly evaluate the value and treat it as a removal operation. Alternatively, a custom weigher may be specified on the map to assign an empty value a positive weight.
public static <A,B> Weigher<? super java.util.Map<A,B>> map()
Map
and its weight is the number of
entries. A map bounded with this weigher will evict when the total number of
entries across all values exceeds the capacity rather than the number of
key-value pairs in the map.
A value with a weight of 0 will be rejected by the map. If a value with this weight can occur then the caller should eagerly evaluate the value and treat it as a removal operation. Alternatively, a custom weigher may be specified on the map to assign an empty value a positive weight.
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