Uses of Interface
com.google.common.base.Function

Packages that use Function

com.google.common.base	Basic utility libraries and interfaces.
com.google.common.cache	This package contains caching utilities.
com.google.common.collect	This package contains generic collection interfaces and implementations, and other utilities for working with collections.
com.google.common.util.concurrent	Concurrency utilities.

Uses of Function in com.google.common.base

Methods in com.google.common.base that return Function

static <A,B,C> Function<A,C>	Functions.compose(Function<B,C> g, Function<A,? extends B> f) Returns the composition of two functions.
static <E> Function<Object,E>	Functions.constant(E value) Creates a function that returns value for any input.
static <K,V> Function<K,V>	Functions.forMap(Map<K,? extends V> map, V defaultValue) Returns a function which performs a map lookup with a default value.
static <K,V> Function<K,V>	Functions.forMap(Map<K,V> map) Returns a function which performs a map lookup.
static <T> Function<T,Boolean>	Functions.forPredicate(Predicate<T> predicate) Creates a function that returns the same boolean output as the given predicate for all inputs.
static <T> Function<Object,T>	Functions.forSupplier(Supplier<T> supplier) Returns a function that always returns the result of invoking Supplier.get() on supplier, regardless of its input.
static <E> Function<E,E>	Functions.identity() Returns the identity function.
static <T> Function<Supplier<T>,T>	Suppliers.supplierFunction() Returns a function that accepts a supplier and returns the result of invoking Supplier.get() on that supplier.
static Function<Object,String>	Functions.toStringFunction() Returns a function that calls toString() on its argument.
static <T extends Enum<T>> Function<String,T>	Enums.valueOfFunction(Class<T> enumClass) Returns a Function that maps an Enum name to the associated Enum constant.

Methods in com.google.common.base with parameters of type Function

static <F,T> Supplier<T>	Suppliers.compose(Function<? super F,T> function, Supplier<F> supplier) Returns a new supplier which is the composition of the provided function and supplier.
static <A,B,C> Function<A,C>	Functions.compose(Function<B,C> g, Function<A,? extends B> f) Returns the composition of two functions.
static <A,B,C> Function<A,C>	Functions.compose(Function<B,C> g, Function<A,? extends B> f) Returns the composition of two functions.
static <A,B> Predicate<A>	Predicates.compose(Predicate<B> predicate, Function<A,? extends B> function) Returns the composition of a function and a predicate.
<F> Equivalence<F>	Equivalence.onResultOf(Function<F,? extends T> function) Returns a new equivalence relation for F which evaluates equivalence by first applying function to the argument, then evaluating using this.

Uses of Function in com.google.common.cache

Subinterfaces of Function in com.google.common.cache

interface	Cache<K,V> A semi-persistent mapping from keys to values.
interface	LoadingCache<K,V> A semi-persistent mapping from keys to values.

Classes in com.google.common.cache that implement Function

class	AbstractCache<K,V> This class provides a skeletal implementation of the Cache interface to minimize the effort required to implement this interface.
class	AbstractLoadingCache<K,V> This class provides a skeletal implementation of the Cache interface to minimize the effort required to implement this interface.
class	ForwardingCache<K,V> A cache which forwards all its method calls to another cache.
static class	ForwardingCache.SimpleForwardingCache<K,V> A simplified version of ForwardingCache where subclasses can pass in an already constructed Cache as the delegete.
class	ForwardingLoadingCache<K,V> A cache which forwards all its method calls to another cache.
static class	ForwardingLoadingCache.SimpleForwardingLoadingCache<K,V> A simplified version of ForwardingLoadingCache where subclasses can pass in an already constructed LoadingCache as the delegete.

Methods in com.google.common.cache with parameters of type Function

static <K,V> CacheLoader<K,V>

CacheLoader.from(Function<K,V> function) Returns a CacheLoader which creates values by applying a Function to the key.

Uses of Function in com.google.common.collect

Methods in com.google.common.collect that return Function

static <E> Function<E,E>

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

Methods in com.google.common.collect with parameters of type Function

static <K,V,I extends Object & Iterable<V> & Iterator<V>> ImmutableListMultimap<K,V>	Multimaps.index(I values, Function<? super V,K> keyFunction) Deprecated. use Multimaps.index(Iterator, Function) by casting values to Iterator<V>, or better yet, by implementing only Iterator and not Iterable. This method is scheduled for deletion in March 2012.
static <K,V> ImmutableListMultimap<K,V>	Multimaps.index(Iterable<V> values, Function<? super V,K> keyFunction) Creates an index ImmutableListMultimap that contains the results of applying a specified function to each item in an Iterable of values.
static <K,V> ImmutableListMultimap<K,V>	Multimaps.index(Iterator<V> values, Function<? super V,K> keyFunction) Creates an index ImmutableListMultimap that contains the results of applying a specified function to each item in an Iterator of values.
abstract <K extends K0,V extends V0> ConcurrentMap<K,V>	GenericMapMaker.makeComputingMap(Function<? super K,? extends V> computingFunction) Deprecated.
<K,V> ConcurrentMap<K,V>	MapMaker.makeComputingMap(Function<? super K,? extends V> computingFunction) Deprecated. Caching functionality in MapMaker is being moved to CacheBuilder, with MapMaker.makeComputingMap(com.google.common.base.Function) being replaced by CacheBuilder.build(com.google.common.cache.CacheLoader). Note that uses of MapMaker.makeComputingMap(com.google.common.base.Function) with AtomicLong values can often be migrated to AtomicLongMap. This method is scheduled for deletion in February 2013.
<F> Ordering<F>	Ordering.onResultOf(Function<F,? extends T> function) Returns a new ordering on F which orders elements by first applying a function to them, then comparing those results using this.
static <F,T> Collection<T>	Collections2.transform(Collection<F> fromCollection, Function<? super F,T> function) Returns a collection that applies function to each element of fromCollection.
static <F,T> Iterable<T>	Iterables.transform(Iterable<F> fromIterable, Function<? super F,? extends T> function) Returns an iterable that applies function to each element of fromIterable.
static <F,T> Iterator<T>	Iterators.transform(Iterator<F> fromIterator, Function<? super F,? extends T> function) Returns an iterator that applies function to each element of fromIterator.
static <F,T> List<T>	Lists.transform(List<F> fromList, Function<? super F,? extends T> function) Returns a list that applies function to each element of fromList.
static <K,V1,V2> ListMultimap<K,V2>	Multimaps.transformValues(ListMultimap<K,V1> fromMultimap, Function<? super V1,V2> function) Returns a view of a ListMultimap where each value is transformed by a function.
static <K,V1,V2> Map<K,V2>	Maps.transformValues(Map<K,V1> fromMap, Function<? super V1,V2> function) Returns a view of a map where each value is transformed by a function.
static <K,V1,V2> Multimap<K,V2>	Multimaps.transformValues(Multimap<K,V1> fromMultimap, Function<? super V1,V2> function) Returns a view of a multimap where each value is transformed by a function.
static <K,V1,V2> SortedMap<K,V2>	SortedMaps.transformValues(SortedMap<K,V1> fromMap, Function<? super V1,V2> function) Deprecated. Use Maps.transformValues(SortedMap, Function)
static <K,V1,V2> SortedMap<K,V2>	Maps.transformValues(SortedMap<K,V1> fromMap, Function<? super V1,V2> function) Returns a view of a sorted map where each value is transformed by a function.
static <R,C,V1,V2> Table<R,C,V2>	Tables.transformValues(Table<R,C,V1> fromTable, Function<? super V1,V2> function) Returns a view of a table where each value is transformed by a function.
static <K,V,I extends Object & Iterable<V> & Iterator<V>> ImmutableMap<K,V>	Maps.uniqueIndex(I values, Function<? super V,K> keyFunction) Deprecated. use Maps.uniqueIndex(Iterator, Function) by casting values to Iterator<V>, or better yet, by implementing only Iterator and not Iterable. This method is scheduled for deletion in March 2012.
static <K,V> ImmutableMap<K,V>	Maps.uniqueIndex(Iterable<V> values, Function<? super V,K> keyFunction) Returns an immutable map for which the Map.values() are the given elements in the given order, and each key is the product of invoking a supplied function on its corresponding value.
static <K,V> ImmutableMap<K,V>	Maps.uniqueIndex(Iterator<V> values, Function<? super V,K> keyFunction) Returns an immutable map for which the Map.values() are the given elements in the given order, and each key is the product of invoking a supplied function on its corresponding value.

Uses of Function in com.google.common.util.concurrent

Methods in com.google.common.util.concurrent with parameters of type Function

static <I,O> ListenableFuture<O>	Futures.chain(ListenableFuture<I> input, Function<? super I,? extends ListenableFuture<? extends O>> function) Deprecated. Convert your Function to a AsyncFunction, and use Futures.transform(ListenableFuture, AsyncFunction). This method is scheduled to be removed from Guava in Guava release 12.0.
static <I,O> ListenableFuture<O>	Futures.chain(ListenableFuture<I> input, Function<? super I,? extends ListenableFuture<? extends O>> function, Executor executor) Deprecated. Convert your Function to a AsyncFunction, and use Futures.transform(ListenableFuture, AsyncFunction, Executor). This method is scheduled to be removed from Guava in Guava release 12.0.
static <I,O> Future<O>	Futures.lazyTransform(Future<I> future, Function<? super I,? extends O> function) Like Futures.transform(ListenableFuture, Function) except that the transformation function is invoked on each call to get() on the returned future.
static <V,X extends Exception> CheckedFuture<V,X>	Futures.makeChecked(ListenableFuture<V> future, Function<Exception,X> mapper) Creates a CheckedFuture out of a normal ListenableFuture and a Function that maps from Exception instances into the appropriate checked type.
static <I,O> ListenableFuture<O>	Futures.transform(ListenableFuture<I> future, Function<? super I,? extends O> function) Returns a new ListenableFuture whose result is the product of applying the given Function to the result of the given Future.
static <I,O> ListenableFuture<O>	Futures.transform(ListenableFuture<I> future, Function<? super I,? extends O> function, Executor executor) Returns a new ListenableFuture whose result is the product of applying the given Function to the result of the given Future.