1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.util; 18 19 public class Preconditions { checkArgument(boolean expression)20 public static void checkArgument(boolean expression) { 21 throw new UnsupportedOperationException(); 22 } 23 checkArgument(boolean expression, Object errorMessage)24 public static void checkArgument(boolean expression, Object errorMessage) { 25 throw new UnsupportedOperationException(); 26 } 27 checkNotNull(T reference)28 public static <T> T checkNotNull(T reference) { 29 throw new UnsupportedOperationException(); 30 } 31 checkNotNull(T reference, Object errorMessage)32 public static <T> T checkNotNull(T reference, Object errorMessage) { 33 throw new UnsupportedOperationException(); 34 } 35 checkState(boolean expression)36 public static void checkState(boolean expression) { 37 throw new UnsupportedOperationException(); 38 } 39 checkState(boolean expression, String message)40 public static void checkState(boolean expression, String message) { 41 throw new UnsupportedOperationException(); 42 } 43 } 44