1 /* 2 * Copyright (C) 2017 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 package libcore.util; 17 18 import static java.lang.annotation.ElementType.TYPE_USE; 19 import static java.lang.annotation.ElementType.TYPE_PARAMETER; 20 import static java.lang.annotation.RetentionPolicy.SOURCE; 21 22 import java.lang.annotation.Documented; 23 import java.lang.annotation.Retention; 24 import java.lang.annotation.Target; 25 26 /** 27 * Denotes that a type use can be a null. 28 * <p> 29 * This is a marker annotation and it has no specific attributes. 30 */ 31 @Documented 32 @Retention(SOURCE) 33 @Target({TYPE_USE}) 34 public @interface Nullable { 35 /** 36 * Min Android API level (inclusive) to which this annotation is applied. 37 */ 38 int from() default Integer.MIN_VALUE; 39 40 /** 41 * Max Android API level to which this annotation is applied. 42 */ 43 int to() default Integer.MAX_VALUE; 44 } 45
