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/*
 * Copyright 2014 The Error Prone Authors.
 *
 * 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.google.errorprone.annotations.concurrent;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.CLASS;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * The method to which this annotation is applied acquires one or more locks. The caller will hold
 * the locks when the function finishes execution.
 *
 * This annotation does not apply to built-in (synchronization) locks, which cannot be acquired
 * without being released in the same method.
 *
 * 
The arguments determine which locks the annotated method acquires:
 *
 * 

 *   field-name: The lock is referenced by the final instance field specified by
 *       field-name.
 *   
class-name.this.field-name: For inner classes, it may be necessary to
 *       disambiguate 'this'; the class-name.this designation allows you to specify which
 *       'this' reference is intended.
 *   
class-name.field-name: The lock is referenced by the static final field
 *       specified by class-name.field-name.
 *   
method-name(): The lock object is returned by calling the named nullary
 *       method.
 * 
 */
@Target(METHOD)
@Retention(CLASS)
public @interface LockMethod {
  String[] value();
}