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/*
* Copyright (C) 2011 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 com.android.annotations;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.LOCAL_VARIABLE;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Denotes that a parameter, field or method return value can be null.
* <b>Note</b>: this is the default assumption for most Java APIs and the
* default assumption made by most static code checking tools, so usually you
* don't need to use this annotation; its primary use is to override a default
* wider annotation like {@link NonNullByDefault}.
* <p/>
* When decorating a method call parameter, this denotes 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.
*/
@Documented
@Retention(RetentionPolicy.CLASS)
@Target({METHOD, PARAMETER, LOCAL_VARIABLE, FIELD})
public @interface Nullable {
}
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