Package com.google.common.collect
Class Interners
- java.lang.Object
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- com.google.common.collect.Interners
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@Beta @GwtIncompatible public final class Interners extends Object
Contains static methods pertaining to instances ofInterner
.- Since:
- 3.0
- Author:
- Kevin Bourrillion
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
Interners.InternerBuilder
Builder forInterner
instances.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static <E> Function<E,E>
asFunction(Interner<E> interner)
Returns a function that delegates to theInterner.intern(E)
method of the given interner.static Interners.InternerBuilder
newBuilder()
Returns a freshInterners.InternerBuilder
instance.static <E> Interner<E>
newStrongInterner()
Returns a new thread-safe interner which retains a strong reference to each instance it has interned, thus preventing these instances from being garbage-collected.static <E> Interner<E>
newWeakInterner()
Returns a new thread-safe interner which retains a weak reference to each instance it has interned, and so does not prevent these instances from being garbage-collected.
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Method Detail
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newBuilder
public static Interners.InternerBuilder newBuilder()
Returns a freshInterners.InternerBuilder
instance.
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newStrongInterner
public static <E> Interner<E> newStrongInterner()
Returns a new thread-safe interner which retains a strong reference to each instance it has interned, thus preventing these instances from being garbage-collected. If this retention is acceptable, this implementation may perform better thannewWeakInterner()
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newWeakInterner
@GwtIncompatible("java.lang.ref.WeakReference") public static <E> Interner<E> newWeakInterner()
Returns a new thread-safe interner which retains a weak reference to each instance it has interned, and so does not prevent these instances from being garbage-collected. This most likely does not perform as well asnewStrongInterner()
, but is the best alternative when the memory usage of that implementation is unacceptable.
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asFunction
public static <E> Function<E,E> asFunction(Interner<E> interner)
Returns a function that delegates to theInterner.intern(E)
method of the given interner.- Since:
- 8.0
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