Java tutorial
/* * Copyright (c) 2016 Gridtec. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package at.gridtec.lambda4j.function.bi.obj; import at.gridtec.lambda4j.Lambda; import at.gridtec.lambda4j.consumer.ShortConsumer; import at.gridtec.lambda4j.consumer.bi.obj.ObjLongConsumer2; import at.gridtec.lambda4j.function.BooleanFunction; import at.gridtec.lambda4j.function.ByteFunction; import at.gridtec.lambda4j.function.CharFunction; import at.gridtec.lambda4j.function.FloatFunction; import at.gridtec.lambda4j.function.ShortFunction; import at.gridtec.lambda4j.function.bi.BiFunction2; import at.gridtec.lambda4j.function.bi.conversion.BiBooleanToShortFunction; import at.gridtec.lambda4j.function.bi.conversion.BiByteToShortFunction; import at.gridtec.lambda4j.function.bi.conversion.BiCharToShortFunction; import at.gridtec.lambda4j.function.bi.conversion.BiDoubleToShortFunction; import at.gridtec.lambda4j.function.bi.conversion.BiFloatToShortFunction; import at.gridtec.lambda4j.function.bi.conversion.BiIntToShortFunction; import at.gridtec.lambda4j.function.bi.conversion.BiLongToShortFunction; import at.gridtec.lambda4j.function.bi.to.ToShortBiFunction; import at.gridtec.lambda4j.function.conversion.BooleanToLongFunction; import at.gridtec.lambda4j.function.conversion.ByteToLongFunction; import at.gridtec.lambda4j.function.conversion.CharToLongFunction; import at.gridtec.lambda4j.function.conversion.FloatToLongFunction; import at.gridtec.lambda4j.function.conversion.LongToShortFunction; import at.gridtec.lambda4j.function.conversion.ShortToByteFunction; import at.gridtec.lambda4j.function.conversion.ShortToCharFunction; import at.gridtec.lambda4j.function.conversion.ShortToDoubleFunction; import at.gridtec.lambda4j.function.conversion.ShortToFloatFunction; import at.gridtec.lambda4j.function.conversion.ShortToIntFunction; import at.gridtec.lambda4j.function.conversion.ShortToLongFunction; import at.gridtec.lambda4j.function.to.ToShortFunction; import at.gridtec.lambda4j.operator.binary.ShortBinaryOperator; import at.gridtec.lambda4j.operator.unary.ShortUnaryOperator; import at.gridtec.lambda4j.predicate.ShortPredicate; import at.gridtec.lambda4j.predicate.bi.obj.ObjLongPredicate; import org.apache.commons.lang3.tuple.Pair; import javax.annotation.Nonnegative; import javax.annotation.Nonnull; import javax.annotation.Nullable; import java.util.Map; import java.util.Objects; import java.util.concurrent.ConcurrentHashMap; import java.util.function.DoubleFunction; import java.util.function.DoubleToLongFunction; import java.util.function.Function; import java.util.function.IntFunction; import java.util.function.IntToLongFunction; import java.util.function.LongFunction; import java.util.function.LongUnaryOperator; import java.util.function.ToLongFunction; /** * Represents an operation that accepts one object-valued and one {@code long}-valued input argument and produces a * {@code short}-valued result. * This is a (reference, long) specialization of {@link BiFunction2}. * <p> * This is a {@link FunctionalInterface} whose functional method is {@link #applyAsShort(Object, long)}. * * @param <T> The type of the first argument to the function * @see BiFunction2 */ @SuppressWarnings("unused") @FunctionalInterface public interface ObjLongToShortFunction<T> extends Lambda { /** * Constructs a {@link ObjLongToShortFunction} based on a lambda expression or a method reference. Thereby the given * lambda expression or method reference is returned on an as-is basis to implicitly transform it to the desired * type. With this method, it is possible to ensure that correct type is used from lambda expression or method * reference. * * @param <T> The type of the first argument to the function * @param expression A lambda expression or (typically) a method reference, e.g. {@code this::method} * @return A {@code ObjLongToShortFunction} from given lambda expression or method reference. * @implNote This implementation allows the given argument to be {@code null}, but only if {@code null} given, * {@code null} will be returned. * @see <a href="https://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html#syntax">Lambda * Expression</a> * @see <a href="https://docs.oracle.com/javase/tutorial/java/javaOO/methodreferences.html">Method Reference</a> */ static <T> ObjLongToShortFunction<T> of(@Nullable final ObjLongToShortFunction<T> expression) { return expression; } /** * Calls the given {@link ObjLongToShortFunction} with the given arguments and returns its result. * * @param <T> The type of the first argument to the function * @param function The function to be called * @param t The first argument to the function * @param value The second argument to the function * @return The result from the given {@code ObjLongToShortFunction}. * @throws NullPointerException If given argument is {@code null} */ static <T> short call(@Nonnull final ObjLongToShortFunction<? super T> function, T t, long value) { Objects.requireNonNull(function); return function.applyAsShort(t, value); } /** * Creates a {@link ObjLongToShortFunction} which uses the {@code first} parameter of this one as argument for the * given {@link ToShortFunction}. * * @param <T> The type of the first argument to the function * @param function The function which accepts the {@code first} parameter of this one * @return Creates a {@code ObjLongToShortFunction} which uses the {@code first} parameter of this one as argument * for the given {@code ToShortFunction}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull static <T> ObjLongToShortFunction<T> onlyFirst(@Nonnull final ToShortFunction<? super T> function) { Objects.requireNonNull(function); return (t, value) -> function.applyAsShort(t); } /** * Creates a {@link ObjLongToShortFunction} which uses the {@code second} parameter of this one as argument for the * given {@link LongToShortFunction}. * * @param <T> The type of the first argument to the function * @param function The function which accepts the {@code second} parameter of this one * @return Creates a {@code ObjLongToShortFunction} which uses the {@code second} parameter of this one as argument * for the given {@code LongToShortFunction}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull static <T> ObjLongToShortFunction<T> onlySecond(@Nonnull final LongToShortFunction function) { Objects.requireNonNull(function); return (t, value) -> function.applyAsShort(value); } /** * Creates a {@link ObjLongToShortFunction} which always returns a given value. * * @param <T> The type of the first argument to the function * @param ret The return value for the constant * @return A {@code ObjLongToShortFunction} which always returns a given value. */ @Nonnull static <T> ObjLongToShortFunction<T> constant(short ret) { return (t, value) -> ret; } /** * Applies this function to the given arguments. * * @param t The first argument to the function * @param value The second argument to the function * @return The return value from the function, which is its result. */ short applyAsShort(T t, long value); /** * Applies this function partially to some arguments of this one, producing a {@link LongToShortFunction} as result. * * @param t The first argument to this function used to partially apply this function * @return A {@code LongToShortFunction} that represents this function partially applied the some arguments. */ @Nonnull default LongToShortFunction papplyAsShort(T t) { return (value) -> this.applyAsShort(t, value); } /** * Applies this function partially to some arguments of this one, producing a {@link ToShortFunction} as result. * * @param value The second argument to this function used to partially apply this function * @return A {@code ToShortFunction} that represents this function partially applied the some arguments. */ @Nonnull default ToShortFunction<T> papplyAsShort(long value) { return (t) -> this.applyAsShort(t, value); } /** * Returns the number of arguments for this function. * * @return The number of arguments for this function. * @implSpec The default implementation always returns {@code 2}. */ @Nonnegative default int arity() { return 2; } /** * Returns a composed {@link ToShortBiFunction} that first applies the {@code before} functions to its input, and * then applies this function to the result. * If evaluation of either operation throws an exception, it is relayed to the caller of the composed operation. * * @param <A> The type of the argument to the first given function, and of composed function * @param <B> The type of the argument to the second given function, and of composed function * @param before1 The first function to apply before this function is applied * @param before2 The second function to apply before this function is applied * @return A composed {@code ToShortBiFunction} that first applies the {@code before} functions to its input, and * then applies this function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is able to handle every type. */ @Nonnull default <A, B> ToShortBiFunction<A, B> compose(@Nonnull final Function<? super A, ? extends T> before1, @Nonnull final ToLongFunction<? super B> before2) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); return (a, b) -> applyAsShort(before1.apply(a), before2.applyAsLong(b)); } /** * Returns a composed {@link BiBooleanToShortFunction} that first applies the {@code before} functions to its input, * and then applies this function to the result. If evaluation of either operation throws an exception, it is * relayed to the caller of the composed operation. This method is just convenience, to provide the ability to * execute an operation which accepts {@code boolean} input, before this primitive function is executed. * * @param before1 The first function to apply before this function is applied * @param before2 The second function to apply before this function is applied * @return A composed {@code BiBooleanToShortFunction} that first applies the {@code before} functions to its input, * and then applies this function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to handle primitive values. In this case this is {@code * boolean}. */ @Nonnull default BiBooleanToShortFunction composeFromBoolean(@Nonnull final BooleanFunction<? extends T> before1, @Nonnull final BooleanToLongFunction before2) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); return (value1, value2) -> applyAsShort(before1.apply(value1), before2.applyAsLong(value2)); } /** * Returns a composed {@link BiByteToShortFunction} that first applies the {@code before} functions to * its input, and then applies this function to the result. * If evaluation of either operation throws an exception, it is relayed to the caller of the composed operation. * This method is just convenience, to provide the ability to execute an operation which accepts {@code byte} input, * before this primitive function is executed. * * @param before1 The first function to apply before this function is applied * @param before2 The second function to apply before this function is applied * @return A composed {@code BiByteToShortFunction} that first applies the {@code before} functions to its input, * and then applies this function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to handle primitive values. In this case this is {@code * byte}. */ @Nonnull default BiByteToShortFunction composeFromByte(@Nonnull final ByteFunction<? extends T> before1, @Nonnull final ByteToLongFunction before2) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); return (value1, value2) -> applyAsShort(before1.apply(value1), before2.applyAsLong(value2)); } /** * Returns a composed {@link BiCharToShortFunction} that first applies the {@code before} functions to * its input, and then applies this function to the result. * If evaluation of either operation throws an exception, it is relayed to the caller of the composed operation. * This method is just convenience, to provide the ability to execute an operation which accepts {@code char} input, * before this primitive function is executed. * * @param before1 The first function to apply before this function is applied * @param before2 The second function to apply before this function is applied * @return A composed {@code BiCharToShortFunction} that first applies the {@code before} functions to its input, * and then applies this function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to handle primitive values. In this case this is {@code * char}. */ @Nonnull default BiCharToShortFunction composeFromChar(@Nonnull final CharFunction<? extends T> before1, @Nonnull final CharToLongFunction before2) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); return (value1, value2) -> applyAsShort(before1.apply(value1), before2.applyAsLong(value2)); } /** * Returns a composed {@link BiDoubleToShortFunction} that first applies the {@code before} functions to its input, * and then applies this function to the result. If evaluation of either operation throws an exception, it is * relayed to the caller of the composed operation. This method is just convenience, to provide the ability to * execute an operation which accepts {@code double} input, before this primitive function is executed. * * @param before1 The first function to apply before this function is applied * @param before2 The second function to apply before this function is applied * @return A composed {@code BiDoubleToShortFunction} that first applies the {@code before} functions to its input, * and then applies this function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to handle primitive values. In this case this is {@code * double}. */ @Nonnull default BiDoubleToShortFunction composeFromDouble(@Nonnull final DoubleFunction<? extends T> before1, @Nonnull final DoubleToLongFunction before2) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); return (value1, value2) -> applyAsShort(before1.apply(value1), before2.applyAsLong(value2)); } /** * Returns a composed {@link BiFloatToShortFunction} that first applies the {@code before} functions to its input, * and then applies this function to the result. If evaluation of either operation throws an exception, it is * relayed to the caller of the composed operation. This method is just convenience, to provide the ability to * execute an operation which accepts {@code float} input, before this primitive function is executed. * * @param before1 The first function to apply before this function is applied * @param before2 The second function to apply before this function is applied * @return A composed {@code BiFloatToShortFunction} that first applies the {@code before} functions to its input, * and then applies this function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to handle primitive values. In this case this is {@code * float}. */ @Nonnull default BiFloatToShortFunction composeFromFloat(@Nonnull final FloatFunction<? extends T> before1, @Nonnull final FloatToLongFunction before2) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); return (value1, value2) -> applyAsShort(before1.apply(value1), before2.applyAsLong(value2)); } /** * Returns a composed {@link BiIntToShortFunction} that first applies the {@code before} functions to * its input, and then applies this function to the result. * If evaluation of either operation throws an exception, it is relayed to the caller of the composed operation. * This method is just convenience, to provide the ability to execute an operation which accepts {@code int} input, * before this primitive function is executed. * * @param before1 The first function to apply before this function is applied * @param before2 The second function to apply before this function is applied * @return A composed {@code BiIntToShortFunction} that first applies the {@code before} functions to its input, and * then applies this function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to handle primitive values. In this case this is {@code * int}. */ @Nonnull default BiIntToShortFunction composeFromInt(@Nonnull final IntFunction<? extends T> before1, @Nonnull final IntToLongFunction before2) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); return (value1, value2) -> applyAsShort(before1.apply(value1), before2.applyAsLong(value2)); } /** * Returns a composed {@link BiLongToShortFunction} that first applies the {@code before} functions to * its input, and then applies this function to the result. * If evaluation of either operation throws an exception, it is relayed to the caller of the composed operation. * This method is just convenience, to provide the ability to execute an operation which accepts {@code long} input, * before this primitive function is executed. * * @param before1 The first function to apply before this function is applied * @param before2 The second operator to apply before this function is applied * @return A composed {@code BiLongToShortFunction} that first applies the {@code before} functions to its input, * and then applies this function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to handle primitive values. In this case this is {@code * long}. */ @Nonnull default BiLongToShortFunction composeFromLong(@Nonnull final LongFunction<? extends T> before1, @Nonnull final LongUnaryOperator before2) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); return (value1, value2) -> applyAsShort(before1.apply(value1), before2.applyAsLong(value2)); } /** * Returns a composed {@link ShortBinaryOperator} that first applies the {@code before} functions to its input, and * then applies this function to the result. If evaluation of either operation throws an exception, it is relayed to * the caller of the composed operation. This method is just convenience, to provide the ability to execute an * operation which accepts {@code short} input, before this primitive function is executed. * * @param before1 The first function to apply before this function is applied * @param before2 The second function to apply before this function is applied * @return A composed {@code ShortBinaryOperator} that first applies the {@code before} functions to its input, and * then applies this function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to handle primitive values. In this case this is {@code * short}. */ @Nonnull default ShortBinaryOperator composeFromShort(@Nonnull final ShortFunction<? extends T> before1, @Nonnull final ShortToLongFunction before2) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); return (value1, value2) -> applyAsShort(before1.apply(value1), before2.applyAsLong(value2)); } /** * Returns a composed {@link ObjLongFunction} that first applies this function to its input, and then applies the * {@code after} function to the result. * If evaluation of either operation throws an exception, it is relayed to the caller of the composed operation. * * @param <S> The type of return value from the {@code after} function, and of the composed function * @param after The function to apply after this function is applied * @return A composed {@code ObjLongFunction} that first applies this function to its input, and then applies the * {@code after} function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is able to return every type. */ @Nonnull default <S> ObjLongFunction<T, S> andThen(@Nonnull final ShortFunction<? extends S> after) { Objects.requireNonNull(after); return (t, value) -> after.apply(applyAsShort(t, value)); } /** * Returns a composed {@link ObjLongPredicate} that first applies this function to its input, and then applies the * {@code after} predicate to the result. If evaluation of either operation throws an exception, it is relayed to * the caller of the composed operation. This method is just convenience, to provide the ability to transform this * primitive function to an operation returning {@code boolean}. * * @param after The predicate to apply after this function is applied * @return A composed {@code ObjLongPredicate} that first applies this function to its input, and then applies the * {@code after} predicate to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to return primitive values. In this case this is {@code * boolean}. */ @Nonnull default ObjLongPredicate<T> andThenToBoolean(@Nonnull final ShortPredicate after) { Objects.requireNonNull(after); return (t, value) -> after.test(applyAsShort(t, value)); } /** * Returns a composed {@link ObjLongToByteFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. If evaluation of either operation throws an exception, it is relayed to * the caller of the composed operation. This method is just convenience, to provide the ability to transform this * primitive function to an operation returning {@code byte}. * * @param after The function to apply after this function is applied * @return A composed {@code ObjLongToByteFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to return primitive values. In this case this is {@code * byte}. */ @Nonnull default ObjLongToByteFunction<T> andThenToByte(@Nonnull final ShortToByteFunction after) { Objects.requireNonNull(after); return (t, value) -> after.applyAsByte(applyAsShort(t, value)); } /** * Returns a composed {@link ObjLongToCharFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. If evaluation of either operation throws an exception, it is relayed to * the caller of the composed operation. This method is just convenience, to provide the ability to transform this * primitive function to an operation returning {@code char}. * * @param after The function to apply after this function is applied * @return A composed {@code ObjLongToCharFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to return primitive values. In this case this is {@code * char}. */ @Nonnull default ObjLongToCharFunction<T> andThenToChar(@Nonnull final ShortToCharFunction after) { Objects.requireNonNull(after); return (t, value) -> after.applyAsChar(applyAsShort(t, value)); } /** * Returns a composed {@link ObjLongToDoubleFunction} that first applies this function to its input, and then * applies the {@code after} function to the result. If evaluation of either operation throws an exception, it is * relayed to the caller of the composed operation. This method is just convenience, to provide the ability to * transform this primitive function to an operation returning {@code double}. * * @param after The function to apply after this function is applied * @return A composed {@code ObjLongToDoubleFunction} that first applies this function to its input, and then * applies the {@code after} function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to return primitive values. In this case this is {@code * double}. */ @Nonnull default ObjLongToDoubleFunction<T> andThenToDouble(@Nonnull final ShortToDoubleFunction after) { Objects.requireNonNull(after); return (t, value) -> after.applyAsDouble(applyAsShort(t, value)); } /** * Returns a composed {@link ObjLongToFloatFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. If evaluation of either operation throws an exception, it is relayed to * the caller of the composed operation. This method is just convenience, to provide the ability to transform this * primitive function to an operation returning {@code float}. * * @param after The function to apply after this function is applied * @return A composed {@code ObjLongToFloatFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to return primitive values. In this case this is {@code * float}. */ @Nonnull default ObjLongToFloatFunction<T> andThenToFloat(@Nonnull final ShortToFloatFunction after) { Objects.requireNonNull(after); return (t, value) -> after.applyAsFloat(applyAsShort(t, value)); } /** * Returns a composed {@link ObjLongToIntFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. If evaluation of either operation throws an exception, it is relayed to * the caller of the composed operation. This method is just convenience, to provide the ability to transform this * primitive function to an operation returning {@code int}. * * @param after The function to apply after this function is applied * @return A composed {@code ObjLongToIntFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to return primitive values. In this case this is {@code * int}. */ @Nonnull default ObjLongToIntFunction<T> andThenToInt(@Nonnull final ShortToIntFunction after) { Objects.requireNonNull(after); return (t, value) -> after.applyAsInt(applyAsShort(t, value)); } /** * Returns a composed {@link ObjLongToLongFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. If evaluation of either operation throws an exception, it is relayed to * the caller of the composed operation. This method is just convenience, to provide the ability to transform this * primitive function to an operation returning {@code long}. * * @param after The function to apply after this function is applied * @return A composed {@code ObjLongToLongFunction} that first applies this function to its input, and then applies * the {@code after} function to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to return primitive values. In this case this is {@code * long}. */ @Nonnull default ObjLongToLongFunction<T> andThenToLong(@Nonnull final ShortToLongFunction after) { Objects.requireNonNull(after); return (t, value) -> after.applyAsLong(applyAsShort(t, value)); } /** * Returns a composed {@link ObjLongToShortFunction} that first applies this function to its input, and then applies * the {@code after} operator to the result. If evaluation of either operation throws an exception, it is relayed to * the caller of the composed operation. This method is just convenience, to provide the ability to transform this * primitive function to an operation returning {@code short}. * * @param after The operator to apply after this function is applied * @return A composed {@code ObjLongToShortFunction} that first applies this function to its input, and then applies * the {@code after} operator to the result. * @throws NullPointerException If given argument is {@code null} * @implSpec The input argument of this method is a able to return primitive values. In this case this is {@code * short}. */ @Nonnull default ObjLongToShortFunction<T> andThenToShort(@Nonnull final ShortUnaryOperator after) { Objects.requireNonNull(after); return (t, value) -> after.applyAsShort(applyAsShort(t, value)); } /** * Returns a composed {@link ObjLongConsumer2} that fist applies this function to its input, and then consumes the * result using the given {@link ShortConsumer}. If evaluation of either operation throws an exception, it is * relayed to the caller of the composed operation. * * @param consumer The operation which consumes the result from this operation * @return A composed {@code ObjLongConsumer2} that first applies this function to its input, and then consumes the * result using the given {@code ShortConsumer}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull default ObjLongConsumer2<T> consume(@Nonnull final ShortConsumer consumer) { Objects.requireNonNull(consumer); return (t, value) -> consumer.accept(applyAsShort(t, value)); } /** * Returns a memoized (caching) version of this {@link ObjLongToShortFunction}. Whenever it is called, the mapping * between the input parameters and the return value is preserved in a cache, making subsequent calls returning the * memoized value instead of computing the return value again. * <p> * Unless the function and therefore the used cache will be garbage-collected, it will keep all memoized values * forever. * * @return A memoized (caching) version of this {@code ObjLongToShortFunction}. * @implSpec This implementation does not allow the input parameters or return value to be {@code null} for the * resulting memoized function, as the cache used internally does not permit {@code null} keys or values. * @implNote The returned memoized function can be safely used concurrently from multiple threads which makes it * thread-safe. */ @Nonnull default ObjLongToShortFunction<T> memoized() { if (isMemoized()) { return this; } else { final Map<Pair<T, Long>, Short> cache = new ConcurrentHashMap<>(); final Object lock = new Object(); return (ObjLongToShortFunction<T> & Memoized) (t, value) -> { final short returnValue; synchronized (lock) { returnValue = cache.computeIfAbsent(Pair.of(t, value), key -> applyAsShort(key.getLeft(), key.getRight())); } return returnValue; }; } } /** * Returns a composed {@link BiFunction2} which represents this {@link ObjLongToShortFunction}. Thereby the * primitive input argument for this function is autoboxed. This method provides the possibility to use this {@code * ObjLongToShortFunction} with methods provided by the {@code JDK}. * * @return A composed {@code BiFunction2} which represents this {@code ObjLongToShortFunction}. */ @Nonnull default BiFunction2<T, Long, Short> boxed() { return this::applyAsShort; } }