org.checkerframework.checker.lock.qual.EnsuresLockHeld Maven / Gradle / Ivy

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The Checker Framework enhances Java's type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

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package org.checkerframework.checker.lock.qual;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.checkerframework.framework.qual.InheritedAnnotation;
import org.checkerframework.framework.qual.PostconditionAnnotation;

/**
 * Indicates that the given expressions are held if the method terminates successfully.
 *
 * @see EnsuresLockHeldIf
 * @checker_framework.manual #lock-checker Lock Checker
 * @checker_framework.manual #ensureslockheld-examples Example use of @EnsuresLockHeld
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
@PostconditionAnnotation(qualifier = LockHeld.class)
@InheritedAnnotation
@Repeatable(EnsuresLockHeld.List.class)
public @interface EnsuresLockHeld {
  /**
   * Returns Java expressions whose values are locks that are held after successful method
   * termination.
   *
   * @return Java expressions whose values are locks that are held after successful method
   *     termination
   * @see Syntax of
   *     Java expressions
   */
  String[] value();

  /**
   * A wrapper annotation that makes the {@link EnsuresLockHeld} annotation repeatable.
   *
   * Programmers generally do not need to write this. It is created by Java when a programmer
   * writes more than one {@link EnsuresLockHeld} annotation at the same location.
   */
  @Documented
  @Retention(RetentionPolicy.RUNTIME)
  @Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
  @PostconditionAnnotation(qualifier = LockHeld.class)
  @InheritedAnnotation
  @interface List {
    /**
     * Return the repeatable annotations.
     *
     * @return the repeatable annotations
     */
    EnsuresLockHeld[] value();
  }
}