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/*
 * Copyright (C) 2015 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 android.support.annotation;

import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.CLASS;

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

/**
 * Denotes that the annotated method should only be called on the main thread.
 * If the annotated element is a class, then all methods in the class should be called
 * on the main thread.
 * 
 * Example:
 * 

 *  @MainThread
 *  public void deliverResult(D data) { ... }
 * 
 *
 * Note: Ordinarily, an app's main thread is also the UI
 * thread. However, However, under special circumstances, an app's main thread
 * might not be its UI thread; for more information, see
 * Thread
 * annotations.
 *
 * android.support.annotation.UiThread
 */
@Documented
@Retention(CLASS)
@Target({METHOD,CONSTRUCTOR,TYPE,PARAMETER})
public @interface MainThread {
}