83 lines
2.2 KiB
Java
83 lines
2.2 KiB
Java
/*
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* Copyright (C) 2019 The Android Open Source Project
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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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* http://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.android.testutils;
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import java.util.function.Supplier;
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/**
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* A class grouping some utilities to deal with exceptions.
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*/
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public class ExceptionUtils {
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/**
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* Like a Consumer, but declared to throw an exception.
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* @param <T>
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*/
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@FunctionalInterface
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public interface ThrowingConsumer<T> {
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/** @see java.util.function.Consumer */
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void accept(T t) throws Exception;
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}
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/**
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* Like a Supplier, but declared to throw an exception.
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* @param <T>
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*/
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@FunctionalInterface
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public interface ThrowingSupplier<T> {
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/** @see java.util.function.Supplier */
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T get() throws Exception;
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}
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/**
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* Like a Runnable, but declared to throw an exception.
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*/
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@FunctionalInterface
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public interface ThrowingRunnable {
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/** @see java.lang.Runnable */
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void run() throws Exception;
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}
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/**
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* Convert a supplier that throws into one that doesn't.
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*
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* The returned supplier returns null in cases where the source throws.
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*/
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public static <T> Supplier<T> ignoreExceptions(ThrowingSupplier<T> func) {
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return () -> {
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try {
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return func.get();
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} catch (Exception e) {
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return null;
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}
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};
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}
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/**
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* Convert a runnable that throws into one that doesn't.
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*
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* All exceptions are ignored by the returned Runnable.
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*/
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public static Runnable ignoreExceptions(ThrowingRunnable r) {
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return () -> {
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try {
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r.run();
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} catch (Exception e) {
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}
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};
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}
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}
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