Yan Zhulanow
47 lines
1.7 KiB
Java
Executable File
47 lines
1.7 KiB
Java
Executable File
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.annotations;
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import java.lang.annotation.Documented;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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import static java.lang.annotation.ElementType.*;
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/**
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* Denotes that a parameter, field or method return value can be null.
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* <b>Note</b>: this is the default assumption for most Java APIs and the
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* default assumption made by most static code checking tools, so usually you
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* don't need to use this annotation; its primary use is to override a default
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* wider annotation like {@link NonNullByDefault}.
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* <p/>
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* When decorating a method call parameter, this denotes the parameter can
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* legitimately be null and the method will gracefully deal with it. Typically
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* used on optional parameters.
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* <p/>
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* When decorating a method, this denotes the method might legitimately return
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* null.
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* <p/>
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* This is a marker annotation and it has no specific attributes.
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*/
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@Documented
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@Retention(RetentionPolicy.CLASS)
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@Target({METHOD, PARAMETER, LOCAL_VARIABLE, FIELD})
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public @interface Nullable {
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}
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