com.google.common.collect

Class Interners

java.lang.Object

com.google.common.collect.Interners

@Beta
 @GwtIncompatible
public final class Interners
extends Object

Contains static methods pertaining to instances of Interner.

Since:

3.0

Author:

Kevin Bourrillion

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Interners.InternerBuilder Builder for Interner instances.

Method Summary

Modifier and Type	Method and Description
static <E> Function<E,E>	asFunction(Interner<E> interner) Returns a function that delegates to the Interner.intern(E) method of the given interner.
static Interners.InternerBuilder	newBuilder() Returns a fresh Interners.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.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

newBuilder

public static Interners.InternerBuilder newBuilder()

Returns a fresh Interners.InternerBuilder instance.

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 than newWeakInterner().

newWeakInterner

@GwtIncompatible(value="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 as newStrongInterner(), but is the best alternative when the memory usage of that implementation is unacceptable.

asFunction

public static <E> Function<E,E> asFunction(Interner<E> interner)

Returns a function that delegates to the Interner.intern(E) method of the given interner.

Since:

8.0