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.operator.ternary; import at.gridtec.lambda4j.Lambda; import at.gridtec.lambda4j.consumer.tri.TriLongConsumer; 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.LongToByteFunction; import at.gridtec.lambda4j.function.conversion.LongToCharFunction; import at.gridtec.lambda4j.function.conversion.LongToFloatFunction; import at.gridtec.lambda4j.function.conversion.LongToShortFunction; import at.gridtec.lambda4j.function.conversion.ShortToLongFunction; import at.gridtec.lambda4j.function.tri.TriLongFunction; import at.gridtec.lambda4j.function.tri.conversion.TriBooleanToLongFunction; import at.gridtec.lambda4j.function.tri.conversion.TriByteToLongFunction; import at.gridtec.lambda4j.function.tri.conversion.TriCharToLongFunction; import at.gridtec.lambda4j.function.tri.conversion.TriDoubleToLongFunction; import at.gridtec.lambda4j.function.tri.conversion.TriFloatToLongFunction; import at.gridtec.lambda4j.function.tri.conversion.TriIntToLongFunction; import at.gridtec.lambda4j.function.tri.conversion.TriLongToByteFunction; import at.gridtec.lambda4j.function.tri.conversion.TriLongToCharFunction; import at.gridtec.lambda4j.function.tri.conversion.TriLongToDoubleFunction; import at.gridtec.lambda4j.function.tri.conversion.TriLongToFloatFunction; import at.gridtec.lambda4j.function.tri.conversion.TriLongToIntFunction; import at.gridtec.lambda4j.function.tri.conversion.TriLongToShortFunction; import at.gridtec.lambda4j.function.tri.conversion.TriShortToLongFunction; import at.gridtec.lambda4j.function.tri.to.ToLongTriFunction; import at.gridtec.lambda4j.operator.binary.LongBinaryOperator2; import at.gridtec.lambda4j.operator.unary.LongUnaryOperator2; import at.gridtec.lambda4j.predicate.tri.TriLongPredicate; 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.DoubleToLongFunction; import java.util.function.IntToLongFunction; import java.util.function.LongConsumer; import java.util.function.LongFunction; import java.util.function.LongPredicate; import java.util.function.LongToDoubleFunction; import java.util.function.LongToIntFunction; import java.util.function.LongUnaryOperator; import java.util.function.ToLongFunction; /** * Represents an operation that accepts three {@code long}-valued input arguments and produces a * {@code long}-valued result. * This is a primitive specialization of {@link TernaryOperator}. * <p> * This is a {@link FunctionalInterface} whose functional method is {@link #applyAsLong(long, long, long)}. * * @see TernaryOperator */ @SuppressWarnings("unused") @FunctionalInterface public interface LongTernaryOperator extends Lambda { /** * Constructs a {@link LongTernaryOperator} 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 LongTernaryOperator} 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 LongTernaryOperator of(@Nullable final LongTernaryOperator expression) { return expression; } /** * Calls the given {@link LongTernaryOperator} with the given arguments and returns its result. * * @param operator The operator to be called * @param value1 The first argument to the operator * @param value2 The second argument to the operator * @param value3 The third argument to the operator * @return The result from the given {@code LongTernaryOperator}. * @throws NullPointerException If given argument is {@code null} */ static long call(@Nonnull final LongTernaryOperator operator, long value1, long value2, long value3) { Objects.requireNonNull(operator); return operator.applyAsLong(value1, value2, value3); } /** * Creates a {@link LongTernaryOperator} which uses the {@code first} parameter of this one as argument for the * given {@link LongUnaryOperator}. * * @param operator The operator which accepts the {@code first} parameter of this one * @return Creates a {@code LongTernaryOperator} which uses the {@code first} parameter of this one as argument for * the given {@code LongUnaryOperator}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull static LongTernaryOperator onlyFirst(@Nonnull final LongUnaryOperator operator) { Objects.requireNonNull(operator); return (value1, value2, value3) -> operator.applyAsLong(value1); } /** * Creates a {@link LongTernaryOperator} which uses the {@code second} parameter of this one as argument for the * given {@link LongUnaryOperator}. * * @param operator The operator which accepts the {@code second} parameter of this one * @return Creates a {@code LongTernaryOperator} which uses the {@code second} parameter of this one as argument for * the given {@code LongUnaryOperator}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull static LongTernaryOperator onlySecond(@Nonnull final LongUnaryOperator operator) { Objects.requireNonNull(operator); return (value1, value2, value3) -> operator.applyAsLong(value2); } /** * Creates a {@link LongTernaryOperator} which uses the {@code third} parameter of this one as argument for the * given {@link LongUnaryOperator}. * * @param operator The operator which accepts the {@code third} parameter of this one * @return Creates a {@code LongTernaryOperator} which uses the {@code third} parameter of this one as argument for * the given {@code LongUnaryOperator}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull static LongTernaryOperator onlyThird(@Nonnull final LongUnaryOperator operator) { Objects.requireNonNull(operator); return (value1, value2, value3) -> operator.applyAsLong(value3); } /** * Creates a {@link LongTernaryOperator} which always returns a given value. * * @param ret The return value for the constant * @return A {@code LongTernaryOperator} which always returns a given value. */ @Nonnull static LongTernaryOperator constant(long ret) { return (value1, value2, value3) -> ret; } /** * Applies this operator to the given arguments. * * @param value1 The first argument to the operator * @param value2 The second argument to the operator * @param value3 The third argument to the operator * @return The return value from the operator, which is its result. */ long applyAsLong(long value1, long value2, long value3); /** * Applies this operator partially to some arguments of this one, producing a {@link LongBinaryOperator2} as result. * * @param value1 The first argument to this operator used to partially apply this function * @return A {@code LongBinaryOperator2} that represents this operator partially applied the some arguments. */ @Nonnull default LongBinaryOperator2 papplyAsLong(long value1) { return (value2, value3) -> this.applyAsLong(value1, value2, value3); } /** * Applies this operator partially to some arguments of this one, producing a {@link LongUnaryOperator2} as result. * * @param value1 The first argument to this operator used to partially apply this function * @param value2 The second argument to this operator used to partially apply this function * @return A {@code LongUnaryOperator2} that represents this operator partially applied the some arguments. */ @Nonnull default LongUnaryOperator2 papplyAsLong(long value1, long value2) { return (value3) -> this.applyAsLong(value1, value2, value3); } /** * Returns the number of arguments for this operator. * * @return The number of arguments for this operator. * @implSpec The default implementation always returns {@code 3}. */ @Nonnegative default int arity() { return 3; } /** * Returns a composed {@link ToLongTriFunction} that first applies the {@code before} functions to its input, and * then applies this operator 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 <C> The type of the argument to the third given function, and of composed function * @param before1 The first function to apply before this operator is applied * @param before2 The second function to apply before this operator is applied * @param before3 The third function to apply before this operator is applied * @return A composed {@code ToLongTriFunction} that first applies the {@code before} functions to its input, and * then applies this operator 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> ToLongTriFunction<A, B, C> compose(@Nonnull final ToLongFunction<? super A> before1, @Nonnull final ToLongFunction<? super B> before2, @Nonnull final ToLongFunction<? super C> before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (a, b, c) -> applyAsLong(before1.applyAsLong(a), before2.applyAsLong(b), before3.applyAsLong(c)); } /** * Returns a composed {@link TriBooleanToLongFunction} that first applies the {@code before} functions to its input, * and then applies this 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 * execute an operation which accepts {@code boolean} input, before this primitive operator is executed. * * @param before1 The first function to apply before this operator is applied * @param before2 The second function to apply before this operator is applied * @param before3 The third function to apply before this operator is applied * @return A composed {@code TriBooleanToLongFunction} that first applies the {@code before} functions to its input, * and then applies this operator 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 TriBooleanToLongFunction composeFromBoolean(@Nonnull final BooleanToLongFunction before1, @Nonnull final BooleanToLongFunction before2, @Nonnull final BooleanToLongFunction before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsLong(before1.applyAsLong(value1), before2.applyAsLong(value2), before3.applyAsLong(value3)); } /** * Returns a composed {@link TriByteToLongFunction} that first applies the {@code before} functions to * its input, and then applies this 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 execute an operation which accepts {@code byte} input, * before this primitive operator is executed. * * @param before1 The first function to apply before this operator is applied * @param before2 The second function to apply before this operator is applied * @param before3 The third function to apply before this operator is applied * @return A composed {@code TriByteToLongFunction} that first applies the {@code before} functions to its input, * and then applies this operator 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 TriByteToLongFunction composeFromByte(@Nonnull final ByteToLongFunction before1, @Nonnull final ByteToLongFunction before2, @Nonnull final ByteToLongFunction before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsLong(before1.applyAsLong(value1), before2.applyAsLong(value2), before3.applyAsLong(value3)); } /** * Returns a composed {@link TriCharToLongFunction} that first applies the {@code before} functions to * its input, and then applies this 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 execute an operation which accepts {@code char} input, * before this primitive operator is executed. * * @param before1 The first function to apply before this operator is applied * @param before2 The second function to apply before this operator is applied * @param before3 The third function to apply before this operator is applied * @return A composed {@code TriCharToLongFunction} that first applies the {@code before} functions to its input, * and then applies this operator 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 TriCharToLongFunction composeFromChar(@Nonnull final CharToLongFunction before1, @Nonnull final CharToLongFunction before2, @Nonnull final CharToLongFunction before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsLong(before1.applyAsLong(value1), before2.applyAsLong(value2), before3.applyAsLong(value3)); } /** * Returns a composed {@link TriDoubleToLongFunction} that first applies the {@code before} functions to its input, * and then applies this 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 * execute an operation which accepts {@code double} input, before this primitive operator is executed. * * @param before1 The first function to apply before this operator is applied * @param before2 The second function to apply before this operator is applied * @param before3 The third function to apply before this operator is applied * @return A composed {@code TriDoubleToLongFunction} that first applies the {@code before} functions to its input, * and then applies this operator 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 TriDoubleToLongFunction composeFromDouble(@Nonnull final DoubleToLongFunction before1, @Nonnull final DoubleToLongFunction before2, @Nonnull final DoubleToLongFunction before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsLong(before1.applyAsLong(value1), before2.applyAsLong(value2), before3.applyAsLong(value3)); } /** * Returns a composed {@link TriFloatToLongFunction} that first applies the {@code before} functions to its input, * and then applies this 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 * execute an operation which accepts {@code float} input, before this primitive operator is executed. * * @param before1 The first function to apply before this operator is applied * @param before2 The second function to apply before this operator is applied * @param before3 The third function to apply before this operator is applied * @return A composed {@code TriFloatToLongFunction} that first applies the {@code before} functions to its input, * and then applies this operator 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 TriFloatToLongFunction composeFromFloat(@Nonnull final FloatToLongFunction before1, @Nonnull final FloatToLongFunction before2, @Nonnull final FloatToLongFunction before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsLong(before1.applyAsLong(value1), before2.applyAsLong(value2), before3.applyAsLong(value3)); } /** * Returns a composed {@link TriIntToLongFunction} that first applies the {@code before} functions to * its input, and then applies this 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 execute an operation which accepts {@code int} input, * before this primitive operator is executed. * * @param before1 The first function to apply before this operator is applied * @param before2 The second function to apply before this operator is applied * @param before3 The third function to apply before this operator is applied * @return A composed {@code TriIntToLongFunction} that first applies the {@code before} functions to its input, and * then applies this operator 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 TriIntToLongFunction composeFromInt(@Nonnull final IntToLongFunction before1, @Nonnull final IntToLongFunction before2, @Nonnull final IntToLongFunction before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsLong(before1.applyAsLong(value1), before2.applyAsLong(value2), before3.applyAsLong(value3)); } /** * Returns a composed {@link LongTernaryOperator} that first applies the {@code before} operators to * its input, and then applies this 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 execute an operation which accepts {@code long} input, * before this primitive operator is executed. * * @param before1 The first operator to apply before this operator is applied * @param before2 The second operator to apply before this operator is applied * @param before3 The third operator to apply before this operator is applied * @return A composed {@code LongTernaryOperator} that first applies the {@code before} operators to its input, and * then applies this operator 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 LongTernaryOperator composeFromLong(@Nonnull final LongUnaryOperator before1, @Nonnull final LongUnaryOperator before2, @Nonnull final LongUnaryOperator before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsLong(before1.applyAsLong(value1), before2.applyAsLong(value2), before3.applyAsLong(value3)); } /** * Returns a composed {@link TriShortToLongFunction} that first applies the {@code before} functions to its input, * and then applies this 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 * execute an operation which accepts {@code short} input, before this primitive operator is executed. * * @param before1 The first function to apply before this operator is applied * @param before2 The second function to apply before this operator is applied * @param before3 The third function to apply before this operator is applied * @return A composed {@code TriShortToLongFunction} that first applies the {@code before} functions to its input, * and then applies this operator 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 TriShortToLongFunction composeFromShort(@Nonnull final ShortToLongFunction before1, @Nonnull final ShortToLongFunction before2, @Nonnull final ShortToLongFunction before3) { Objects.requireNonNull(before1); Objects.requireNonNull(before2); Objects.requireNonNull(before3); return (value1, value2, value3) -> applyAsLong(before1.applyAsLong(value1), before2.applyAsLong(value2), before3.applyAsLong(value3)); } /** * Returns a composed {@link TriLongFunction} that first applies this operator 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 operator is applied * @return A composed {@code TriLongFunction} that first applies this operator 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> TriLongFunction<S> andThen(@Nonnull final LongFunction<? extends S> after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.apply(applyAsLong(value1, value2, value3)); } /** * Returns a composed {@link TriLongPredicate} that first applies this operator 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 operator to an operation returning {@code boolean}. * * @param after The predicate to apply after this operator is applied * @return A composed {@code TriLongPredicate} that first applies this operator 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 TriLongPredicate andThenToBoolean(@Nonnull final LongPredicate after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.test(applyAsLong(value1, value2, value3)); } /** * Returns a composed {@link TriLongToByteFunction} that first applies this operator 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 operator to an operation returning {@code byte}. * * @param after The function to apply after this operator is applied * @return A composed {@code TriLongToByteFunction} that first applies this operator 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 TriLongToByteFunction andThenToByte(@Nonnull final LongToByteFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsByte(applyAsLong(value1, value2, value3)); } /** * Returns a composed {@link TriLongToCharFunction} that first applies this operator 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 operator to an operation returning {@code char}. * * @param after The function to apply after this operator is applied * @return A composed {@code TriLongToCharFunction} that first applies this operator 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 TriLongToCharFunction andThenToChar(@Nonnull final LongToCharFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsChar(applyAsLong(value1, value2, value3)); } /** * Returns a composed {@link TriLongToDoubleFunction} that first applies this operator 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 operator to an operation returning {@code double}. * * @param after The function to apply after this operator is applied * @return A composed {@code TriLongToDoubleFunction} that first applies this operator 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 TriLongToDoubleFunction andThenToDouble(@Nonnull final LongToDoubleFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsDouble(applyAsLong(value1, value2, value3)); } /** * Returns a composed {@link TriLongToFloatFunction} that first applies this operator 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 operator to an operation returning {@code float}. * * @param after The function to apply after this operator is applied * @return A composed {@code TriLongToFloatFunction} that first applies this operator 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 TriLongToFloatFunction andThenToFloat(@Nonnull final LongToFloatFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsFloat(applyAsLong(value1, value2, value3)); } /** * Returns a composed {@link TriLongToIntFunction} that first applies this operator 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 operator to an operation returning {@code int}. * * @param after The function to apply after this operator is applied * @return A composed {@code TriLongToIntFunction} that first applies this operator 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 TriLongToIntFunction andThenToInt(@Nonnull final LongToIntFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsInt(applyAsLong(value1, value2, value3)); } /** * Returns a composed {@link LongTernaryOperator} that first applies this operator 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 operator to an operation returning {@code long}. * * @param after The operator to apply after this operator is applied * @return A composed {@code LongTernaryOperator} that first applies this operator 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 * long}. */ @Nonnull default LongTernaryOperator andThenToLong(@Nonnull final LongUnaryOperator after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsLong(applyAsLong(value1, value2, value3)); } /** * Returns a composed {@link TriLongToShortFunction} that first applies this operator 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 operator to an operation returning {@code short}. * * @param after The function to apply after this operator is applied * @return A composed {@code TriLongToShortFunction} that first applies this operator 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 TriLongToShortFunction andThenToShort(@Nonnull final LongToShortFunction after) { Objects.requireNonNull(after); return (value1, value2, value3) -> after.applyAsShort(applyAsLong(value1, value2, value3)); } /** * Returns a composed {@link TriLongConsumer} that fist applies this operator to its input, and then consumes the * result using the given {@link LongConsumer}. 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 TriLongConsumer} that first applies this operator to its input, and then consumes the * result using the given {@code LongConsumer}. * @throws NullPointerException If given argument is {@code null} */ @Nonnull default TriLongConsumer consume(@Nonnull final LongConsumer consumer) { Objects.requireNonNull(consumer); return (value1, value2, value3) -> consumer.accept(applyAsLong(value1, value2, value3)); } /** * Returns a memoized (caching) version of this {@link LongTernaryOperator}. 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 operator and therefore the used cache will be garbage-collected, it will keep all memoized values * forever. * * @return A memoized (caching) version of this {@code LongTernaryOperator}. * @implSpec This implementation does not allow the input parameters or return value to be {@code null} for the * resulting memoized operator, as the cache used internally does not permit {@code null} keys or values. * @implNote The returned memoized operator can be safely used concurrently from multiple threads which makes it * thread-safe. */ @Nonnull default LongTernaryOperator memoized() { if (isMemoized()) { return this; } else { final Map<Triple<Long, Long, Long>, Long> cache = new ConcurrentHashMap<>(); final Object lock = new Object(); return (LongTernaryOperator & Memoized) (value1, value2, value3) -> { final long returnValue; synchronized (lock) { returnValue = cache.computeIfAbsent(Triple.of(value1, value2, value3), key -> applyAsLong(key.getLeft(), key.getMiddle(), key.getRight())); } return returnValue; }; } } /** * Returns a composed {@link TernaryOperator} which represents this {@link LongTernaryOperator}. Thereby the * primitive input argument for this operator is autoboxed. This method provides the possibility to use this {@code * LongTernaryOperator} with methods provided by the {@code JDK}. * * @return A composed {@code TernaryOperator} which represents this {@code LongTernaryOperator}. */ @Nonnull default TernaryOperator<Long> boxed() { return this::applyAsLong; } }