/**

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2013-2014 Oracle and/or its affiliates. All rights reserved.

 *

 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.

 * Other names may be trademarks of their respective owners.

 *

 * The contents of this file are subject to the terms of either the GNU

 * General Public License Version 2 only ("GPL") or the Common

 * Development and Distribution License("CDDL") (collectively, the

 * "License"). You may not use this file except in compliance with the

 * License. You can obtain a copy of the License at

 * http://www.netbeans.org/cddl-gplv2.html

 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

 * specific language governing permissions and limitations under the

 * License.  When distributing the software, include this License Header

 * Notice in each file and include the License file at

 * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the GPL Version 2 section of the License file that

 * accompanied this code. If applicable, add the following below the

 * License Header, with the fields enclosed by brackets [] replaced by

 * your own identifying information:

 * "Portions Copyrighted [year] [name of copyright owner]"

 *

 * Contributor(s):

 *

 * The Original Software is NetBeans. The Initial Developer of the Original

 * Software is Oracle. Portions Copyright 2013-2014 Oracle. All Rights Reserved.

 *

 * If you wish your version of this file to be governed by only the CDDL

 * or only the GPL Version 2, indicate your decision by adding

 * "[Contributor] elects to include this software in this distribution

 * under the [CDDL or GPL Version 2] license." If you do not indicate a

 * single choice of license, a recipient has the option to distribute

 * your version of this file under either the CDDL, the GPL Version 2 or

 * to extend the choice of license to its licensees as provided above.

 * However, if you add GPL Version 2 code and therefore, elected the GPL

 * Version 2 license, then the option applies only if the new code is

 * made subject to such option by the copyright holder.

 */

package net.java.html.json;

import java.lang.annotation.ElementType;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.lang.annotation.Target;

import java.net.URL;

import java.util.List;

/** Defines a model class that represents a single 

 * <a href="http://en.wikipedia.org/wiki/JSON">JSON</a>-like object

 * named {@link #className()}. The generated class contains

 * getters and setters for properties defined via {@link #properties()} and

 * getters for other, derived properties defined by annotating methods

 * of this class by {@link ComputedProperty}. Each property

 * can be of primitive type, an {@link Enum enum type} or (in order to create 

 * nested <a href="http://en.wikipedia.org/wiki/JSON">JSON</a> structure)

 * of another {@link Model class generated by @Model} annotation. Each property

 * can either represent a single value or be an array of its values.

 * <p>

 * The {@link #className() generated class}'s <code>toString</code> method

 * converts the state of the object into 

 * <a href="http://en.wikipedia.org/wiki/JSON">JSON</a> format. One can

 * use {@link Models#parse(net.java.html.BrwsrCtx, java.lang.Class, java.io.InputStream)}

 * method to read the JSON text stored in a file or other stream back into the Java model. 

 * One can also use {@link OnReceive @OnReceive} annotation to read the model

 * asynchronously from a {@link URL}.

 * <p>

 * An example where one defines class <code>Person</code> with four

 * properties (<code>firstName</code>, <code>lastName</code>, array of <code>addresses</code> and

 * <code>fullName</code>) follows:

 * <pre>

 * {@link Model @Model}(className="Person", properties={

 *   {@link Property @Property}(name = "firstName", type=String.class),

 *   {@link Property @Property}(name = "lastName", type=String.class)

 *   {@link Property @Property}(name = "addresses", type=Address.class, array = true)

 * })

 * static class PersonModel {

 *   {@link ComputedProperty @ComputedProperty}

 *   static String fullName(String firstName, String lastName) {

 *     return firstName + " " + lastName;

 *   }

 * 

 *   {@link ComputedProperty @ComputedProperty}

 *   static String mainAddress({@link List List<Address>} addresses) {

 *     for (Address a : addresses) {

 *       return a.getStreet() + " " + a.getTown();

 *     }

 *     return "No address";

 *   }

 * 

 *   {@link Model @Model}(className="Address", properties={

 *     {@link Property @Property}(name = "street", type=String.class),

 *     {@link Property @Property}(name = "town", type=String.class)

 *   })

 *   static class AddressModel {

 *   }

 * }

 * </pre>

 * The generated model class has a default constructor, and also <em>quick

 * instantiation</em> constructor that accepts all non-array properties 

 * (in the order used in the {@link #properties()} attribute) and vararg list

 * for the first array property (if any). One can thus use following code

 * to create an instance of the Person and Address classes:

 * <pre>

 * 

 * Person p = new Person("Jaroslav", "Tulach",

 *   new Address("Markoušovice", "Úpice"),

 *   new Address("V Parku", "Praha")

 * );

 * // p.toString() then returns equivalent of following <a href="http://en.wikipedia.org/wiki/JSON">JSON</a> object

 * {

 *   "firstName" : "Jaroslav",

 *   "lastName" : "Tulach",

 *   "addresses" : [

 *     { "street" : "Markoušovice", "town" : "Úpice" },

 *     { "street" : "V Parku", "town" : "Praha" },

 *   ]

 * }

 * </pre>

 * <p>

 * In case you are using <a href="http://knockoutjs.com/">Knockout technology</a>

 * for Java then you can associate such model object with surrounding HTML page by

 * calling: <code>p.applyBindings();</code>. The page can then use regular

 * <a href="http://knockoutjs.com/">Knockout</a> bindings to reference your

 * model and create dynamic connection between your model in Java and 

 * live DOM structure in the browser:

 * <pre>

 * Name: <span data-bind="text: fullName">

 * <div data-bind="foreach: addresses">

 *   Lives in <span data-bind="text: town"/>

 * </div>

 * </pre>

 * <p>

 * Visit an <a target="_blank" href="http://dew.apidesign.org/dew/#7510833">on-line demo</a>

 * to see a histogram driven by the {@link Model} annotation or try 

 * a little <a target="_blank" href="http://dew.apidesign.org/dew/#7263102">math test</a>.

 *

 * @author Jaroslav Tulach

 */

@Retention(RetentionPolicy.SOURCE)

@Target(ElementType.TYPE)

public @interface Model {

    /** Name of the model class */

    String className();

    /** List of properties in the model.

     */

    Property[] properties();

}