kotlin.annotation.Annotations.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* 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 kotlin.annotation
/**
* Contains the list of code elements which are the possible annotation targets
*/
public enum class AnnotationTarget {
/** Class, interface or object, annotation class is also included */
CLASS,
/** Annotation class only */
ANNOTATION_CLASS,
/** Generic type parameter (unsupported yet) */
TYPE_PARAMETER,
/** Property */
PROPERTY,
/** Field, including property's backing field */
FIELD,
/** Local variable */
LOCAL_VARIABLE,
/** Value parameter of a function or a constructor */
VALUE_PARAMETER,
/** Constructor only (primary or secondary) */
CONSTRUCTOR,
/** Function (constructors are not included) */
FUNCTION,
/** Property getter only */
PROPERTY_GETTER,
/** Property setter only */
PROPERTY_SETTER,
/** Type usage */
TYPE,
/** Any expression */
EXPRESSION,
/** File */
FILE
}
/**
* Contains the list of possible annotation's retentions.
*
* Determines how an annotation is stored in binary output.
*/
public enum class AnnotationRetention {
/** Annotation isn't stored in binary output */
SOURCE,
/** Annotation is stored in binary output, but invisible for reflection */
BINARY,
/** Annotation is stored in binary output and visible for reflection (default retention) */
RUNTIME
}
/**
* This meta-annotation indicates the kinds of code elements which are possible targets of an annotation.
*
* If the target meta-annotation is not present on an annotation declaration, the annotation
* is applicable to any code element, except type parameters, type usages, expressions, and files.
*
* @property allowedTargets list of allowed annotation targets
*/
@Target(AnnotationTarget.ANNOTATION_CLASS)
@MustBeDocumented
public annotation class Target(vararg val allowedTargets: AnnotationTarget)
/**
* This meta-annotation determines whether an annotation is stored in binary output and visible for reflection. By default, both are true.
*
* @property value necessary annotation retention (RUNTIME, BINARY or SOURCE)
*/
@Target(AnnotationTarget.ANNOTATION_CLASS)
public annotation class Retention(val value: AnnotationRetention = AnnotationRetention.RUNTIME)
/**
* This meta-annotation determines that an annotation is applicable twice or more on a single code element
*/
@Target(AnnotationTarget.ANNOTATION_CLASS)
public annotation class Repeatable
/**
* This meta-annotation determines that an annotation is a part of public API and therefore must be documented
*/
@Target(AnnotationTarget.ANNOTATION_CLASS)
public annotation class MustBeDocumented