ThrowingUnaryOperator.java

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/*
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 * Copyright 2014-2016 Grzegorz Piwowarek, https://4comprehension.com/
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 * https://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.pivovarit.function;
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import java.util.function.UnaryOperator;
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import static java.util.Objects.requireNonNull;
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/**
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 * Represents an operation on a single operand that produces a result of the
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 * same type as its operand.  This is a specialization of {@code Function} for
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 * the case where the operand and result are of the same type.
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 * Function may throw a checked exception.
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 *
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 * @param <T> the type of the operand and result of the operator
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 * @param <E> the type of the thrown checked exception
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 *
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 * @see ThrowingFunction
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 *
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 * @author Grzegorz Piwowarek
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 */
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@FunctionalInterface
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public interface ThrowingUnaryOperator<T, E extends Exception> extends ThrowingFunction<T, T, E> {
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    /**
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     * Returns a new UnaryOperator instance which wraps the thrown checked exception instance into a {@link CheckedException}
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     *
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     * @param <T>      the type of the operand and result of the operator
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     * @param operator the ThrowingUnaryOperator to wrap
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     * @return UnaryOperator instance that wraps the checked exception into a {@link CheckedException}
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     */
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    static <T> UnaryOperator<T> unchecked(ThrowingUnaryOperator<T, ?> operator) {
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        requireNonNull(operator);
47 1 1. unchecked : replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::unchecked → KILLED
 
        return t -> {
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            try {
49 1 1. lambda$unchecked$0 : replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::lambda$unchecked$0 → SURVIVED
 
                return operator.apply(t);
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            } catch (final Exception e) {
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                throw new CheckedException(e);
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            }
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        };
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    }
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    /**
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     * Returns a new UnaryOperator instance which rethrows the checked exception using the Sneaky Throws pattern
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     *
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     * @param <T>      the type of the operand and result of the operator
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     * @param operator the ThrowingUnaryOperator to wrap
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     * @return UnaryOperator instance that rethrows the checked exception using the Sneaky Throws pattern
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     */
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    static <T> UnaryOperator<T> sneaky(ThrowingUnaryOperator<T, ?> operator) {
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        requireNonNull(operator);
65 1 1. sneaky : replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::sneaky → KILLED
 
        return t -> {
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            try {
67 1 1. lambda$sneaky$0 : replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::lambda$sneaky$0 → NO_COVERAGE
 
                return operator.apply(t);
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            } catch (Exception e) {
69 1 1. lambda$sneaky$0 : replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::lambda$sneaky$0 → NO_COVERAGE
 
                return SneakyThrowUtil.sneakyThrow(e);
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            }
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        };
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    }
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}

Mutations

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1.1
Location : unchecked
Killed by : com.pivovarit.function.ThrowingUnaryOperatorTest.[engine:junit-jupiter]/[class:com.pivovarit.function.ThrowingUnaryOperatorTest]/[method:shouldApplyUnchecked()] replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::unchecked → KILLED

49

1.1
Location : lambda$unchecked$0
Killed by : none replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::lambda$unchecked$0 → SURVIVED Covering tests

65

1.1
Location : sneaky
Killed by : com.pivovarit.function.ThrowingUnaryOperatorTest.[engine:junit-jupiter]/[class:com.pivovarit.function.ThrowingUnaryOperatorTest]/[method:shouldSneakyThrow()] replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::sneaky → KILLED

67

1.1
Location : lambda$sneaky$0
Killed by : none replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::lambda$sneaky$0 → NO_COVERAGE

69

1.1
Location : lambda$sneaky$0
Killed by : none replaced return value with null for com/pivovarit/function/ThrowingUnaryOperator::lambda$sneaky$0 → NO_COVERAGE

Active mutators

Tests examined


Report generated by PIT 1.30.0 support