net.jcip.annotations.GuardedBy Maven / Gradle / Ivy
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/*
* Copyright (c) 2005 Brian Goetz and Tim Peierls
* Released under the Creative Commons Attribution License
* (http://creativecommons.org/licenses/by/2.5)
* Official home: http://www.jcip.net
*
* Any republication or derived work distributed in source code form
* must include this copyright and license notice.
*/
package net.jcip.annotations;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* The field or method to which this annotation is applied can only be accessed
* when holding a particular lock, which may be a built-in (synchronization) lock,
* or may be an explicit java.util.concurrent.Lock.
*
* The argument determines which lock guards the annotated field or method:
*
* -
*
this : The intrinsic lock of the object in whose class the field is defined.
*
* -
*
class-name.this : For inner classes, it may be necessary to disambiguate 'this';
* the class-name.this designation allows you to specify which 'this' reference is intended
*
* -
*
itself : For reference fields only; the object to which the field refers.
*
* -
*
field-name : The lock object is referenced by the (instance or static) field
* specified by field-name.
*
* -
*
class-name.field-name : The lock object is reference by the static field specified
* by class-name.field-name.
*
* -
*
method-name() : The lock object is returned by calling the named nil-ary method.
*
* -
*
class-name.class : The Class object for the specified class should be used as the lock object.
*
*/
@Target({ElementType.FIELD, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface GuardedBy {
String value();
}