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.tri.conversion; import at.gridtec.lambda4j.Lambda; import at.gridtec.lambda4j.consumer.tri.TriBooleanConsumer; import at.gridtec.lambda4j.function.bi.conversion.BiBooleanToDoubleFunction; import at.gridtec.lambda4j.function.conversion.BooleanToDoubleFunction; import at.gridtec.lambda4j.function.conversion.DoubleToByteFunction; import at.gridtec.lambda4j.function.conversion.DoubleToCharFunction; import at.gridtec.lambda4j.function.conversion.DoubleToFloatFunction; import at.gridtec.lambda4j.function.conversion.DoubleToShortFunction; import at.gridtec.lambda4j.function.tri.TriBooleanFunction; import at.gridtec.lambda4j.function.tri.TriFunction; import at.gridtec.lambda4j.function.tri.to.ToDoubleTriFunction; import at.gridtec.lambda4j.operator.ternary.BooleanTernaryOperator; import at.gridtec.lambda4j.operator.ternary.DoubleTernaryOperator; import at.gridtec.lambda4j.operator.unary.BooleanUnaryOperator; import at.gridtec.lambda4j.predicate.BytePredicate; import at.gridtec.lambda4j.predicate.CharPredicate; import at.gridtec.lambda4j.predicate.FloatPredicate; import at.gridtec.lambda4j.predicate.ShortPredicate; import org.apache.commons.lang3.tuple.Triple; 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.DoubleConsumer; import java.util.function.DoubleFunction; import java.util.function.DoublePredicate; import java.util.function.DoubleToIntFunction; import java.util.function.DoubleToLongFunction; import java.util.function.DoubleUnaryOperator; import java.util.function.IntPredicate; import java.util.function.LongPredicate; import java.util.function.Predicate; /** * Represents an operation that accepts three {@code boolean}-valued input arguments and produces a * {@code double}-valued result. * This is a primitive specialization of {@link TriFunction}. * <p> * This is a {@link FunctionalInterface} whose functional method is {@link #applyAsDouble(boolean, boolean, boolean)}. * * @see TriFunction */ @SuppressWarnings("unused") @FunctionalInterface public interface TriBooleanToDoubleFunction extends Lambda { /** * Constructs a {@link TriBooleanToDoubleFunction} 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 expression A lambda expression or (typically) a method reference, e.g. {@code this::method} * @return A {@code TriBooleanToDoubleFunction} 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 TriBooleanToDoubleFunction of(@Nullable final TriBooleanToDoubleFunction expression) { return expression; } /** * Calls the given {@link TriBooleanToDoubleFunction} with the given arguments and returns its result. * * @param function The function to be called * @param value1 The first argument to the function * @param value2 The second argument to the function * @param value3 The third argument to the function * @return The result from the given {@code TriBooleanToDoubleFunction}. * @throws NullPointerException If given argument is {@code null} */ static double call(@Nonnull final TriBooleanToDoubleFunction function, boolean value1, boolean value2, boolean value3) { Objects.requireNonNull(function); return function.applyAsDouble(value1, value2, value3); } /** * Creates a {@link TriBooleanToDoubleFunction} which uses the {@code first} parameter of this one as argument for * the given {@link BooleanToDoubleFunction}. * * @param function The function which accepts the {@code first} parameter of this one * @return Creates a {@code TriBooleanToDoubleFunction} which uses the {@code first} parameter of this one as * argument for the given {@code BooleanToDoubleFunction}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull static TriBooleanToDoubleFunction onlyFirst(@Nonnull final BooleanToDoubleFunction function) { Objects.requireNonNull(function); return (value1, value2, value3) -> function.applyAsDouble(value1); } /** * Creates a {@link TriBooleanToDoubleFunction} which uses the {@code second} parameter of this one as argument for * the given {@link BooleanToDoubleFunction}. * * @param function The function which accepts the {@code second} parameter of this one * @return Creates a {@code TriBooleanToDoubleFunction} which uses the {@code second} parameter of this one as * argument for the given {@code BooleanToDoubleFunction}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull static TriBooleanToDoubleFunction onlySecond(@Nonnull final BooleanToDoubleFunction function) { Objects.requireNonNull(function); return (value1, value2, value3) -> function.applyAsDouble(value2); } /** * Creates a {@link TriBooleanToDoubleFunction} which uses the {@code third} parameter of this one as argument for * the given {@link BooleanToDoubleFunction}. * * @param function The function which accepts the {@code third} parameter of this one * @return Creates a {@code TriBooleanToDoubleFunction} which uses the {@code third} parameter of this one as * argument for the given {@code BooleanToDoubleFunction}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull static TriBooleanToDoubleFunction onlyThird(@Nonnull final BooleanToDoubleFunction function) { Objects.requireNonNull(function); return (value1, value2, value3) -> function.applyAsDouble(value3); } /** * Creates a {@link TriBooleanToDoubleFunction} which always returns a given value. * * @param ret The return value for the constant * @return A {@code TriBooleanToDoubleFunction} which always returns a given value. */ @Nonnull static TriBooleanToDoubleFunction constant(double ret) { return (value1, value2, value3) -> ret; } /** * Applies this function to the given arguments. * * @param value1 The first argument to the function * @param value2 The second argument to the function * @param value3 The third argument to the function * @return The return value from the function, which is its result. */ double applyAsDouble(boolean value1, boolean value2, boolean value3); /** * Applies this function partially to some arguments of this one, producing a {@link BiBooleanToDoubleFunction} as * result. * * @param value1 The first argument to this function used to partially apply this function * @return A {@code BiBooleanToDoubleFunction} that represents this function partially applied the some arguments. */ @Nonnull default BiBooleanToDoubleFunction papplyAsDouble(boolean value1) { return (value2, value3) -> this.applyAsDouble(value1, value2, value3); } /** * Applies this function partially to some arguments of this one, producing a {@link BooleanToDoubleFunction} as * result. * * @param value1 The first argument to this function used to partially apply this function * @param value2 The second argument to this function used to partially apply this function * @return A {@code BooleanToDoubleFunction} that represents this function partially applied the some arguments. */ @Nonnull default BooleanToDoubleFunction papplyAsDouble(boolean value1, boolean value2) { return (value3) -> this.applyAsDouble(value1, value2, value3); } /** * Returns the number of arguments for this function. * * @return The number of arguments for this function. * @implSpec The default implementation always returns {@code 3}. */ @Nonnegative default int arity() { return 3; } /** * Returns a composed {@link ToDoubleTriFunction} that first applies the {@code before} predicates 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 predicate, and of composed function * @param <B> The type of the argument to the second given predicate, and of composed function * @param <C> The type of the argument to the third given predicate, and of composed function * @param before1 The first predicate to apply before this function is applied * @param before2 The second predicate to apply before this function is applied * @param before3 The third predicate to apply before this function is applied * @return A composed {@code ToDoubleTriFunction} that first applies the {@code before} predicates 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, C> ToDoubleTriFunction<A, B, C> compose(@Nonnull final Predicate<? super A> before1, @Nonnull final Predicate<? super B> before2, @Nonnull final Predicate<? super C> before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (a, b, c) -> applyAsDouble(before1.test(a), before2.test(b), before3.test(c)); } /** * Returns a composed {@link TriBooleanToDoubleFunction} that first applies the {@code before} operators 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 operator to apply before this function is applied * @param before2 The second operator to apply before this function is applied * @param before3 The third operator to apply before this function is applied * @return A composed {@code TriBooleanToDoubleFunction} that first applies the {@code before} operators 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 TriBooleanToDoubleFunction composeFromBoolean(@Nonnull final BooleanUnaryOperator before1, @Nonnull final BooleanUnaryOperator before2, @Nonnull final BooleanUnaryOperator before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsDouble(before1.applyAsBoolean(value1), before2.applyAsBoolean(value2), before3.applyAsBoolean(value3)); } /** * Returns a composed {@link TriByteToDoubleFunction} that first applies the {@code before} predicates 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 predicate to apply before this function is applied * @param before2 The second predicate to apply before this function is applied * @param before3 The third predicate to apply before this function is applied * @return A composed {@code TriByteToDoubleFunction} that first applies the {@code before} predicates 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 TriByteToDoubleFunction composeFromByte(@Nonnull final BytePredicate before1, @Nonnull final BytePredicate before2, @Nonnull final BytePredicate before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsDouble(before1.test(value1), before2.test(value2), before3.test(value3)); } /** * Returns a composed {@link TriCharToDoubleFunction} that first applies the {@code before} predicates 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 predicate to apply before this function is applied * @param before2 The second predicate to apply before this function is applied * @param before3 The third predicate to apply before this function is applied * @return A composed {@code TriCharToDoubleFunction} that first applies the {@code before} predicates 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 TriCharToDoubleFunction composeFromChar(@Nonnull final CharPredicate before1, @Nonnull final CharPredicate before2, @Nonnull final CharPredicate before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsDouble(before1.test(value1), before2.test(value2), before3.test(value3)); } /** * Returns a composed {@link DoubleTernaryOperator} that first applies the {@code before} predicates 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 predicate to apply before this function is applied * @param before2 The second predicate to apply before this function is applied * @param before3 The third predicate to apply before this function is applied * @return A composed {@code DoubleTernaryOperator} that first applies the {@code before} predicates 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 DoubleTernaryOperator composeFromDouble(@Nonnull final DoublePredicate before1, @Nonnull final DoublePredicate before2, @Nonnull final DoublePredicate before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsDouble(before1.test(value1), before2.test(value2), before3.test(value3)); } /** * Returns a composed {@link TriFloatToDoubleFunction} that first applies the {@code before} predicates 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 predicate to apply before this function is applied * @param before2 The second predicate to apply before this function is applied * @param before3 The third predicate to apply before this function is applied * @return A composed {@code TriFloatToDoubleFunction} that first applies the {@code before} predicates 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 TriFloatToDoubleFunction composeFromFloat(@Nonnull final FloatPredicate before1, @Nonnull final FloatPredicate before2, @Nonnull final FloatPredicate before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsDouble(before1.test(value1), before2.test(value2), before3.test(value3)); } /** * Returns a composed {@link TriIntToDoubleFunction} that first applies the {@code before} predicates 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 predicate to apply before this function is applied * @param before2 The second predicate to apply before this function is applied * @param before3 The third predicate to apply before this function is applied * @return A composed {@code TriIntToDoubleFunction} that first applies the {@code before} predicates 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 TriIntToDoubleFunction composeFromInt(@Nonnull final IntPredicate before1, @Nonnull final IntPredicate before2, @Nonnull final IntPredicate before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsDouble(before1.test(value1), before2.test(value2), before3.test(value3)); } /** * Returns a composed {@link TriLongToDoubleFunction} that first applies the {@code before} predicates 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 predicate to apply before this function is applied * @param before2 The second predicate to apply before this function is applied * @param before3 The third predicate to apply before this function is applied * @return A composed {@code TriLongToDoubleFunction} that first applies the {@code before} predicates 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 TriLongToDoubleFunction composeFromLong(@Nonnull final LongPredicate before1, @Nonnull final LongPredicate before2, @Nonnull final LongPredicate before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsDouble(before1.test(value1), before2.test(value2), before3.test(value3)); } /** * Returns a composed {@link TriShortToDoubleFunction} that first applies the {@code before} predicates 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 predicate to apply before this function is applied * @param before2 The second predicate to apply before this function is applied * @param before3 The third predicate to apply before this function is applied * @return A composed {@code TriShortToDoubleFunction} that first applies the {@code before} predicates 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 TriShortToDoubleFunction composeFromShort(@Nonnull final ShortPredicate before1, @Nonnull final ShortPredicate before2, @Nonnull final ShortPredicate before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsDouble(before1.test(value1), before2.test(value2), before3.test(value3)); } /** * Returns a composed {@link TriBooleanFunction} 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 TriBooleanFunction} 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> TriBooleanFunction<S> andThen(@Nonnull final DoubleFunction<? extends S> after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.apply(applyAsDouble(value1, value2, value3)); } /** * Returns a composed {@link BooleanTernaryOperator} 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 BooleanTernaryOperator} 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 BooleanTernaryOperator andThenToBoolean(@Nonnull final DoublePredicate after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.test(applyAsDouble(value1, value2, value3)); } /** * Returns a composed {@link TriBooleanToByteFunction} 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 TriBooleanToByteFunction} 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 TriBooleanToByteFunction andThenToByte(@Nonnull final DoubleToByteFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsByte(applyAsDouble(value1, value2, value3)); } /** * Returns a composed {@link TriBooleanToCharFunction} 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 TriBooleanToCharFunction} 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 TriBooleanToCharFunction andThenToChar(@Nonnull final DoubleToCharFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsChar(applyAsDouble(value1, value2, value3)); } /** * Returns a composed {@link TriBooleanToDoubleFunction} 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 double}. * * @param after The operator to apply after this function is applied * @return A composed {@code TriBooleanToDoubleFunction} 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 * double}. */ @Nonnull default TriBooleanToDoubleFunction andThenToDouble(@Nonnull final DoubleUnaryOperator after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsDouble(applyAsDouble(value1, value2, value3)); } /** * Returns a composed {@link TriBooleanToFloatFunction} 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 TriBooleanToFloatFunction} 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 TriBooleanToFloatFunction andThenToFloat(@Nonnull final DoubleToFloatFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsFloat(applyAsDouble(value1, value2, value3)); } /** * Returns a composed {@link TriBooleanToIntFunction} 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 TriBooleanToIntFunction} 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 TriBooleanToIntFunction andThenToInt(@Nonnull final DoubleToIntFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsInt(applyAsDouble(value1, value2, value3)); } /** * Returns a composed {@link TriBooleanToLongFunction} 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 TriBooleanToLongFunction} 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 TriBooleanToLongFunction andThenToLong(@Nonnull final DoubleToLongFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsLong(applyAsDouble(value1, value2, value3)); } /** * Returns a composed {@link TriBooleanToShortFunction} 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 short}. * * @param after The function to apply after this function is applied * @return A composed {@code TriBooleanToShortFunction} 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 * short}. */ @Nonnull default TriBooleanToShortFunction andThenToShort(@Nonnull final DoubleToShortFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsShort(applyAsDouble(value1, value2, value3)); } /** * Returns a composed {@link TriBooleanConsumer} that fist applies this function to its input, and then consumes the * result using the given {@link DoubleConsumer}. 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 TriBooleanConsumer} that first applies this function to its input, and then consumes * the result using the given {@code DoubleConsumer}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull default TriBooleanConsumer consume(@Nonnull final DoubleConsumer consumer) { Objects.requireNonNull(consumer); return (value1, value2, value3) -> consumer.accept(applyAsDouble(value1, value2, value3)); } /** * Returns a memoized (caching) version of this {@link TriBooleanToDoubleFunction}. 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 TriBooleanToDoubleFunction}. * @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 TriBooleanToDoubleFunction memoized() { if (isMemoized()) { return this; } else { final Map<Triple<Boolean, Boolean, Boolean>, Double> cache = new ConcurrentHashMap<>(); final Object lock = new Object(); return (TriBooleanToDoubleFunction & Memoized) (value1, value2, value3) -> { final double returnValue; synchronized (lock) { returnValue = cache.computeIfAbsent(Triple.of(value1, value2, value3), key -> applyAsDouble(key.getLeft(), key.getMiddle(), key.getRight())); } return returnValue; }; } } /** * Returns a composed {@link TriFunction} which represents this {@link TriBooleanToDoubleFunction}. Thereby the * primitive input argument for this function is autoboxed. This method provides the possibility to use this {@code * TriBooleanToDoubleFunction} with methods provided by the {@code JDK}. * * @return A composed {@code TriFunction} which represents this {@code TriBooleanToDoubleFunction}. */ @Nonnull default TriFunction<Boolean, Boolean, Boolean, Double> boxed() { return this::applyAsDouble; } }