/**
 * Copyright (C) 2010-2016 eBusiness Information, Excilys Group
 * Copyright (C) 2016-2017 the AndroidAnnotations 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 org.androidannotations.annotations.sharedpreferences;

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

import android.content.Context;

/**
 * <p>
 * Apply @{@link SharedPref} on an interface to create a SharedPreference helper
 * that will contain access methods related to the methods you define in the
 * interface.
 * </p>
 * <p>
 * You should then inject your SharedPreference generated class by using
 * {@link Pref} annotation.
 * </p>
 * <blockquote>
 * 
 * Example :
 * 
 * <pre>
 * @EBean
 * public class MyBean {
 * 
 * 	@Pref
 * 	<b>mypackage.MyPref_</b> myPref;
 * }
 * 
 * 
 * package <b>mypackage</b>;
 * 
 * @SharedPref
 * public interface <b>MyPref</b> {
 * 
 * 	// The field name will have default value "John"
 * 	@DefaultString("John")
 * 	String name();
 * 
 * 	// The field age will have default value 42
 * 	@DefaultInt(42)
 * 	int age();
 * 
 * 	// The field lastUpdated will have default value 0
 * 	long lastUpdated();
 * }
 * </pre>
 * 
 * </blockquote>
 * 
 * @see Pref
 */
@Retention(RetentionPolicy.CLASS)
@Target(ElementType.TYPE)
public @interface SharedPref {

	/**
	 * Represents the scope of a SharedPreference.
	 */
	enum Scope {
		/**
		 * The default shared SharedPreference.
		 */
		APPLICATION_DEFAULT, //
		/**
		 * The name of the SharedPreference will contain the name of the
		 * Activity and the name annotated interface.
		 */
		ACTIVITY, //

		/**
		 * The name of the SharedPreference will contain the name of the
		 * Activity (also available through activity.getPreferences()).
		 */
		ACTIVITY_DEFAULT, //

		/**
		 * The name of the SharedPreference will be the name of the annotated
		 * interface.
		 */
		UNIQUE;
	}

	/**
	 * The scope of the preferences, this will change the name of the
	 * SharedPreference.
	 * 
	 * @return the scope of the preferences
	 */
	Scope value() default Scope.ACTIVITY;

	/**
	 * The name of the preferences. To be used with {@link Scope#ACTIVITY} or
	 * {@link Scope#UNIQUE}. If empty the interface name is used.
	 *
	 * @return the name of the preferences
	 */
	String name() default "";

	/**
	 * The operating mode.
	 * 
	 * @see Context#MODE_PRIVATE
	 * @see Context#MODE_WORLD_READABLE
	 * @see Context#MODE_WORLD_WRITEABLE
	 * 
	 * @return the operating mode
	 */
	int mode() default Context.MODE_PRIVATE;
}