001/*
002 * Copyright (C) 2008 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing;
018
019import com.google.common.annotations.GwtCompatible;
020import org.checkerframework.checker.nullness.qual.Nullable;
021
022/**
023 * To be implemented by test generators that can produce test subjects without requiring any
024 * parameters.
025 *
026 * @param <T> the type created by this generator.
027 * @author George van den Driessche
028 */
029@GwtCompatible
030@ElementTypesAreNonnullByDefault
031public interface TestSubjectGenerator<T extends @Nullable Object> {
032  T createTestSubject();
033}