/**
 * Copyright (C) 2010-2016 eBusiness Information, Excilys Group
 *
 * 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 org.androidannotations.annotations;

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

/**
 * <p>
 * Ensures that the method is called from the background thread with
 * (optionally) restrictions by allowed serials. If it is not called from a
 * supposed background thread, then {@link IllegalStateException} will be thrown
 * (by default).
 * </p>
 * <blockquote> <b>Example</b> :
 *
 * <pre>
 * @EBean
 * public class MyBean {
 * 
 * 	@SupposeBackground
 * 	boolean someMethodThatShouldNotBeCalledFromUiThread() {
 * 		// if this method will be called from the UI-thread an exception will be
 * 		// thrown
 * 	}
 * 
 * 	@SupposeBackground(serial = { "serial1", "serial2" })
 * 	boolean someMethodThatShouldBeCalledFromSerial1OrSerial2() {
 * 		// if this method will be called from another thread then a background
 * 		// thread with a
 * 		// serial "serial1" or "serial2", an exception will be thrown
 * 	}
 * 
 * }
 * </pre>
 * 
 * </blockquote>
 *
 * @see org.androidannotations.api.BackgroundExecutor#setWrongThreadListener(org.androidannotations.api.BackgroundExecutor.WrongThreadListener)
 * @see org.androidannotations.api.BackgroundExecutor#DEFAULT_WRONG_THREAD_LISTENER
 * @see org.androidannotations.api.BackgroundExecutor#checkBgThread(String...)
 */
@Retention(RetentionPolicy.CLASS)
@Target(ElementType.METHOD)
public @interface SupposeBackground {

	/**
	 * Allowed serials to restrict a calling thread. If it is an empty list,
	 * then any background thread is allowed.
	 *
	 * @see org.androidannotations.api.BackgroundExecutor#checkBgThread(String...)
	 * 
	 * @return the allowed serials
	 */
	String[] serial() default {};

}