Uses of Interface
com.landawn.abacus.util.function.Function

Packages that use Function

Package	Description
com.landawn.abacus.util
com.landawn.abacus.util.function

Uses of Function in com.landawn.abacus.util

Methods in com.landawn.abacus.util that return Function

Modifier and Type	Method	Description
static <K, V, R> Function<Map.Entry<K,V>,R>	Fn.applyByKey(Function<? super K,? extends R> func)	Apply by key.
static <K, V, R> Function<Map.Entry<K,V>,R>	Fn.applyByValue(Function<? super V,? extends R> func)	Apply by value.
static <A, B, R> Function<A,R>	Fn.applyIfNotNullOrDefault(Function<A,B> mapperA, Function<B,? extends R> mapperB, R defaultValue)	Apply if not null or default.
static <A, B, C, R> Function<A,R>	Fn.applyIfNotNullOrDefault(Function<A,B> mapperA, Function<B,C> mapperB, Function<C,? extends R> mapperC, R defaultValue)	Apply if not null or default.
static <A, B, C, D, R> Function<A,R>	Fn.applyIfNotNullOrDefault(Function<A,B> mapperA, Function<B,C> mapperB, Function<C,D> mapperC, Function<D,? extends R> mapperD, R defaultValue)	Apply if not null or default.
static <A, B, R> Function<A,R>	Fn.applyIfNotNullOrGet(Function<A,B> mapperA, Function<B,? extends R> mapperB, Supplier<R> supplier)	Apply if not null or get.
static <A, B, C, R> Function<A,R>	Fn.applyIfNotNullOrGet(Function<A,B> mapperA, Function<B,C> mapperB, Function<C,? extends R> mapperC, Supplier<R> supplier)	Apply if not null or get.
static <A, B, C, D, R> Function<A,R>	Fn.applyIfNotNullOrGet(Function<A,B> mapperA, Function<B,C> mapperB, Function<C,D> mapperC, Function<D,? extends R> mapperD, Supplier<R> supplier)	Apply if not null or get.
static <T, R> Function<T,R>	Fn.applyIfOrElseDefault(Predicate<? super T> predicate, Function<? super T,? extends R> func, R defaultValue)
static <T, R> Function<T,R>	Fn.applyIfOrElseGet(Predicate<? super T> predicate, Function<? super T,? extends R> func, Supplier<? extends R> supplier)
static <K, V, R> Function<Map.Entry<K,V>,R>	Fn.applyKeyVal(BiFunction<? super K,? super V,? extends R> func)	Apply key val.
static Function<byte[],Double>	Fn.FnB.average()
static Function<double[],Double>	Fn.FnD.average()
static Function<float[],Double>	Fn.FnF.average()
static Function<int[],Double>	Fn.FnI.average()
static Function<long[],Double>	Fn.FnL.average()
static Function<short[],Double>	Fn.FnS.average()
static <T> Function<T,Void>	Fn.c2f(Consumer<? super T> action)
static <T, R> Function<T,R>	Fn.c2f(Consumer<? super T> action, R valueToReturn)
static <T, U> Function<T,U>	Fn.cast(Class<U> clazz)
static <T, A extends NoCachingNoUpdating.DisposableArray<T>> Function<A,T[]>	Fn.Disposables.cloneArray()
static <T extends Comparable<? super T>> Function<T,Integer>	Fn.compareTo(T target)
static <T> Function<T,Integer>	Fn.compareTo(T target, Comparator<? super T> cmp)
static Function<String,Number>	Fn.createNumber()	Creates the number.
static <K, V> Function<V,Map.Entry<K,V>>	Fn.entry(Function<? super V,K> keyMapper)	Deprecated. replaced by Fn#entryByKeyMapper(Function)
static <K, V> Function<V,Map.Entry<K,V>>	Fn.entry(K key)	Deprecated. replaced by Fn#entryWithKey(Object)
static <K, V> Function<V,Map.Entry<K,V>>	Fn.entryByKeyMapper(Function<? super V,K> keyMapper)
static <K, V> Function<K,Map.Entry<K,V>>	Fn.entryByValueMapper(Function<? super K,V> valueMapper)
static <K, V> Function<V,Map.Entry<K,V>>	Fn.entryWithKey(K key)
static <K, V> Function<K,Map.Entry<K,V>>	Fn.entryWithValue(V value)
static <K, V, T> Function<Map.Entry<K,V>,T>	Fn.Entries.f(BiFunction<? super K,? super V,? extends T> f)
static <A, B, T, R> Function<T,R>	Fn.f(A a, B b, TriFunction<A,B,T,R> triFunction)
static <A, T, R> Function<T,R>	Fn.f(A a, BiFunction<A,T,R> biFunction)
static <T, R> Function<T,R>	Fn.f(Function<T,R> predicate)
static <K, V, T, E extends Exception> Function<Map.Entry<K,V>,T>	Fn.Entries.ff(Throwables.BiFunction<? super K,? super V,? extends T,E> f)
static <A, B, T, R, E extends Exception> Function<T,R>	Fn.ff(A a, B b, Throwables.TriFunction<A,B,T,R,E> triFunction)
static <A, T, R, E extends Exception> Function<T,R>	Fn.ff(A a, Throwables.BiFunction<A,T,R,E> biFunction)
static <T, R, E extends Exception> Function<T,R>	Fn.ff(Throwables.Function<T,? extends R,E> function)
static <T, R, E extends Exception> Function<T,R>	Fn.ff(Throwables.Function<T,? extends R,E> function, R defaultOnError)
static <K, V> Function<? super Map<K,? extends Collection<? extends V>>,List<Map<K,V>>>	Fn.flatToMap()	{a=[1, 2, 3], b=[4, 5, 6], c=[7, 8]} -> [{a=1, b=4, c=7}, {a=2, b=5, c=8}, {a=3, b=6}].
static <T, R> Function<T,R>	Fn.from(Function<T,? extends R> function)
static <T> Function<Future<T>,T>	Fn.futureGet()
static <T> Function<Future<T>,T>	Fn.futureGetOrDefaultOnError(T defaultValue)
static <T> Function<u.Optional<? extends T>,T>	Fn.getIfPresentOrElseNull()
static <T> Function<Optional<? extends T>,T>	Fn.getIfPresentOrElseNullJdk()
static <T> Function<T,T>	Fn.identity()
static <T, R> Function<T,R>	Fn.Functions.indexed(IndexedFunction<T,? extends R> func)	Returns a stateful Function.
static <T> Function<T,Indexed<T>>	Fn.indexed()	Returns a stateful Predicate.
static <K, V> Function<Map.Entry<K,V>,Map.Entry<V,K>>	Fn.inverse()
static <A extends NoCachingNoUpdating.DisposableArray> Function<A,String>	Fn.Disposables.join(String delimiter)
static <K, V> Function<Map.Entry<K,V>,K>	Fn.key()
static <K, T> Function<T,Keyed<K,T>>	Fn.keyed(Function<? super T,K> keyMapper)
static <T, K, V> Function<Map.Entry<Keyed<K,T>,V>,T>	Fn.kkv()
static <L, R> Function<Pair<L,R>,L>	Fn.left()
static Function<byte[],Integer>	Fn.FnB.len()
static Function<char[],Integer>	Fn.FnC.len()
static Function<double[],Integer>	Fn.FnD.len()
static Function<float[],Integer>	Fn.FnF.len()
static Function<int[],Integer>	Fn.FnI.len()
static Function<long[],Integer>	Fn.FnL.len()
static Function<short[],Integer>	Fn.FnS.len()
static <T> Function<T[],Integer>	Fn.len()
static <T extends CharSequence> Function<T,Integer>	Fn.length()
static <K, V, KK> Function<Map.Entry<K,V>,Map.Entry<KK,V>>	Fn.mapKey(Function<? super K,? extends KK> func)
static <K, V, VV> Function<Map.Entry<K,V>,Map.Entry<K,VV>>	Fn.mapValue(Function<? super V,? extends VV> func)
static <T, R> Function<T,R>	Fn.memoize(Function<? super T,? extends R> func)
static Function<String,String>	Fn.nullToEmpty()
static <T> Function<List<T>,List<T>>	Fn.nullToEmptyL()	Deprecated. replaced by nullToEmptyList
static <T> Function<List<T>,List<T>>	Fn.nullToEmptyList()
static <K, V> Function<Map<K,V>,Map<K,V>>	Fn.nullToEmptyM()	Deprecated. replaced by nullToEmptyMap
static <K, V> Function<Map<K,V>,Map<K,V>>	Fn.nullToEmptyMap()
static <T> Function<Set<T>,Set<T>>	Fn.nullToEmptyS()	Deprecated. replaced by nullToEmptySet
static <T> Function<Set<T>,Set<T>>	Fn.nullToEmptySet()
static Function<String,Byte>	Fn.parseByte()	Parses the byte.
static Function<String,Double>	Fn.parseDouble()	Parses the double.
static Function<String,Float>	Fn.parseFloat()	Parses the float.
static Function<String,Integer>	Fn.parseInt()	Parses the int.
static Function<String,Long>	Fn.parseLong()	Parses the long.
static Function<String,Short>	Fn.parseShort()	Parses the short.
static <L, R> Function<Pair<L,R>,R>	Fn.right()
static <A, T, R> Function<T,R>	Fn.sf(Object mutex, A a, BiFunction<A,T,R> biFunction)	Synchronized Function.
static <T, R> Function<T,R>	Fn.sf(Object mutex, Function<T,? extends R> function)	Synchronized Function.
static <T extends Collection> Function<T,Integer>	Fn.size()
static <T extends Map> Function<T,Integer>	Fn.sizeM()
static Function<String,String>	Fn.strip()
static Function<String,String>	Fn.stripToEmpty()
static Function<String,String>	Fn.stripToNull()
static Function<byte[],Integer>	Fn.FnB.sum()
static Function<double[],Double>	Fn.FnD.sum()
static Function<float[],Float>	Fn.FnF.sum()
static Function<int[],Integer>	Fn.FnI.sum()
static Function<long[],Long>	Fn.FnL.sum()
static Function<short[],Integer>	Fn.FnS.sum()
static Function<String,String>	Fn.toCamelCase()	To camel case.
static <T> Function<Pair<T,T>,List<T>>	Fn.Pairs.toList()
static <T> Function<Triple<T,T,T>,List<T>>	Fn.Triples.toList()
static Function<String,String>	Fn.toLowerCase()	To lower case.
static Function<String,String>	Fn.toLowerCaseWithUnderscore()	To lower case with underscore.
static Function<Throwable,RuntimeException>	Fn.toRuntimeException()
static <T> Function<Pair<T,T>,Set<T>>	Fn.Pairs.toSet()
static <T> Function<Triple<T,T,T>,Set<T>>	Fn.Triples.toSet()
static <A extends NoCachingNoUpdating.DisposableArray> Function<A,String>	Fn.Disposables.toStr()
static <T> Function<T,String>	Fn.toStr()
static Function<String,String>	Fn.toUpperCase()	To upper case.
static Function<String,String>	Fn.toUpperCaseWithUnderscore()	To upper case with underscore.
static Function<String,String>	Fn.trim()
static Function<String,String>	Fn.trimToEmpty()
static Function<String,String>	Fn.trimToNull()
static <T> Function<T,Tuple.Tuple1<T>>	Fn.tuple1()
default Function<T,R>	Throwables.Function.unchecked()
static <T> Function<Wrapper<T>,T>	Fn.unwrap()
static <K, T> Function<Keyed<K,T>,T>	Fn.val()
static <K, V> Function<Map.Entry<K,V>,V>	Fn.value()
static <T> Function<T,Wrapper<T>>	Fn.wrap()
static <T> Function<T,Wrapper<T>>	Fn.wrap(ToIntFunction<? super T> hashFunction, BiPredicate<? super T,? super T> equalsFunction)

Methods in com.landawn.abacus.util that return types with arguments of type Function

Modifier and Type	Method	Description
static Tuple.Tuple3<Class<?>,Supplier<Object>,Function<Object,Object>>	ClassUtil.getBuilderInfo(Class<?> cls)

Methods in com.landawn.abacus.util with parameters of type Function

Modifier and Type	Method	Description
static <T, R> Function<T,R>	Fn.f(Function<T,R> predicate)
static <T, R, E extends Throwable> Throwables.Function<T,R,E>	Fn.Fnn.ff(Function<T,? extends R> function)

Uses of Function in com.landawn.abacus.util.function

Subinterfaces of Function in com.landawn.abacus.util.function

Modifier and Type	Interface	Description
interface	UnaryOperator<T>	Refer to JDK API documentation at: https://docs.oracle.com/javase/8/docs/api/java/util/function/package-summary.html

Methods in com.landawn.abacus.util.function that return Function

Modifier and Type	Method	Description
default <V> Function<T,V>	Function.andThen(Function<? super R,? extends V> after)
default <V> Function<V,R>	Function.compose(Function<? super V,? extends T> before)
static <T> Function<T,T>	Function.identity()

Methods in com.landawn.abacus.util.function with parameters of type Function

Modifier and Type	Method	Description
default <V> BooleanBiFunction<V>	BooleanBiFunction.andThen(Function<? super R,? extends V> after)
default <V> BooleanFunction<V>	BooleanFunction.andThen(Function<? super R,? extends V> after)
default <V> BooleanTriFunction<V>	BooleanTriFunction.andThen(Function<? super R,? extends V> after)
default <V> ByteBiFunction<V>	ByteBiFunction.andThen(Function<? super R,? extends V> after)
default <V> ByteFunction<V>	ByteFunction.andThen(Function<? super R,? extends V> after)
default <V> ByteTriFunction<V>	ByteTriFunction.andThen(Function<? super R,? extends V> after)
default <V> CharBiFunction<V>	CharBiFunction.andThen(Function<? super R,? extends V> after)
default <V> CharFunction<V>	CharFunction.andThen(Function<? super R,? extends V> after)
default <V> CharTriFunction<V>	CharTriFunction.andThen(Function<? super R,? extends V> after)
default <V> DoubleBiFunction<V>	DoubleBiFunction.andThen(Function<? super R,? extends V> after)
default <V> DoubleTriFunction<V>	DoubleTriFunction.andThen(Function<? super R,? extends V> after)
default <V> FloatBiFunction<V>	FloatBiFunction.andThen(Function<? super R,? extends V> after)
default <V> FloatFunction<V>	FloatFunction.andThen(Function<? super R,? extends V> after)
default <V> FloatTriFunction<V>	FloatTriFunction.andThen(Function<? super R,? extends V> after)
default <V> IntBiFunction<V>	IntBiFunction.andThen(Function<? super R,? extends V> after)
default <V> IntTriFunction<V>	IntTriFunction.andThen(Function<? super R,? extends V> after)
default <V> LongBiFunction<V>	LongBiFunction.andThen(Function<? super R,? extends V> after)
default <V> LongTriFunction<V>	LongTriFunction.andThen(Function<? super R,? extends V> after)
default <V> QuadFunction<A,B,C,D,V>	QuadFunction.andThen(Function<? super R,? extends V> after)
default <V> ShortBiFunction<V>	ShortBiFunction.andThen(Function<? super R,? extends V> after)
default <V> ShortTriFunction<V>	ShortTriFunction.andThen(Function<? super R,? extends V> after)