| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * 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 com.android.internal.app; |
| |
| import org.hamcrest.BaseMatcher; |
| import org.hamcrest.Description; |
| import org.hamcrest.Matcher; |
| |
| /** |
| * Utils for helping with more customized matching options, for example matching the first |
| * occurrence of a set criteria. |
| */ |
| public class MatcherUtils { |
| |
| /** |
| * Returns a {@link Matcher} which only matches the first occurrence of a set criteria. |
| */ |
| static <T> Matcher<T> first(final Matcher<T> matcher) { |
| return new BaseMatcher<T>() { |
| boolean isFirstMatch = true; |
| |
| @Override |
| public boolean matches(final Object item) { |
| if (isFirstMatch && matcher.matches(item)) { |
| isFirstMatch = false; |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void describeTo(final Description description) { |
| description.appendText("Returns the first matching item"); |
| } |
| }; |
| } |
| } |