/**

 * 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 org.apidesign.html.json.spi;

import net.java.html.json.Model;

import net.java.html.json.Models;

/** An implementation of a binding between model classes (see {@link Model})

 * and particular technology like <a href="http://knockoutjs.com">knockout.js</a>

 * in a browser window, etc.

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

public interface Technology<Data> {

    /** Creates an object to wrap the provided model object. The model

     * has previously been generated by annotation processor associated 

     * with {@link Model} annotation.

     * 

     * @param model the model generated from {@link Model}

     * @return internal object representing the model

     */

    public Data wrapModel(Object model);

    /** Converts an element potentially representing a model into the model.

     * @param modelClass expected class to convert the data to

     * @param data the current data provided from the browser

     * @return the instance of modelClass somehow extracted from the data, may return <code>null</code>

     */

    public <M> M toModel(Class<M> modelClass, Object data);

    /** Binds a property between the model and the data as used by the technology.

     * 

     * @param b the description of the requested binding

     * @param model the original instance of the model

     * @param data the data to bind with the model

     */

    public void bind(PropertyBinding b, Object model, Data data);

    /** Model for given data has changed its value. The technology is

     * supposed to update its state (for example DOM nodes associated

     * with the model). The update usually happens asynchronously.

     * 

     * @param data technology's own representation of the model

     * @param propertyName name of the model property that changed

     */

    public void valueHasMutated(Data data, String propertyName);

    public void expose(FunctionBinding fb, Object model, Data d);

    /** Applies given data to current context (usually an HTML page).

     * @param data the data to apply

     */

    public void applyBindings(Data data);

    /**

     * Some technologies may require wrapping a Java array into a special

     * object. In such case they may return it from this method.

     *

     * @param arr original array

     * @return wrapped array

     */

    public Object wrapArray(Object[] arr);

    /** 

     * Run given runnable in a safe mode. If the runnable can be executed

     * immediately, do it. If we need to switch to some other thread, do it

     * and invoke r asynchronously immediately returning from the call to

     * runSafe method.

     * 

     * @param r the runnable to execute

     */

    public void runSafe(Runnable r);

    /** For certain rendering technologies it may be more efficient to register

     * property and function bindings for one instance of the model at once, 

     * rather then doing it incrementally via 

     * {@link Technology#expose(org.apidesign.html.json.spi.FunctionBinding, java.lang.Object, java.lang.Object) }

     * and 

     * {@link Technology#bind(org.apidesign.html.json.spi.PropertyBinding, java.lang.Object, java.lang.Object) }.

     * In such case implement the {@link #wrapModel(java.lang.Object, org.apidesign.html.json.spi.PropertyBinding[], org.apidesign.html.json.spi.FunctionBinding[]) }

     * method of this interface and it will be called instead of the 

     * previous two ones.

     * 

     * @since 0.6

     */

    public static interface BatchInit<D> extends Technology<D> {

        /** Wrap the given model into redering technology appropriate object 

         * <code>D</code> and expose given properties and functions on it.

         * 

         * @param model the {@link Models#isModel(java.lang.Class) model} in Java

         * @param propArr array of property bindings to expose

         * @param funcArr array of functions to expose

         * @return appropriate wrapper around the model

         */

        public D wrapModel(Object model, PropertyBinding[] propArr, FunctionBinding[] funcArr);

    }

}