46 lines
1.5 KiB
Java
46 lines
1.5 KiB
Java
/*
|
|
* Copyright (C) 2013 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 android.annotation;
|
|
|
|
import static java.lang.annotation.ElementType.FIELD;
|
|
import static java.lang.annotation.ElementType.METHOD;
|
|
import static java.lang.annotation.ElementType.PARAMETER;
|
|
import static java.lang.annotation.RetentionPolicy.SOURCE;
|
|
|
|
import java.lang.annotation.Retention;
|
|
import java.lang.annotation.Target;
|
|
|
|
/**
|
|
* Denotes that a parameter, field or method return value can be null.
|
|
* <p>
|
|
* When decorating a method call parameter, this denotes that the parameter can
|
|
* legitimately be null and the method will gracefully deal with it. Typically
|
|
* used on optional parameters.
|
|
* <p>
|
|
* When decorating a method, this denotes the method might legitimately return
|
|
* null.
|
|
* <p>
|
|
* This is a marker annotation and it has no specific attributes.
|
|
*
|
|
* @paramDoc This value may be {@code null}.
|
|
* @returnDoc This value may be {@code null}.
|
|
* @hide
|
|
*/
|
|
@Retention(SOURCE)
|
|
@Target({METHOD, PARAMETER, FIELD})
|
|
public @interface Nullable {
|
|
}
|