/**

  * 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

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 package org.netbeans.html.ko4j;

 import org.netbeans.html.context.spi.Contexts;

 import org.netbeans.html.json.spi.FunctionBinding;

 import org.netbeans.html.json.spi.PropertyBinding;

 import org.netbeans.html.json.spi.Technology;

 import static org.netbeans.html.ko4j.KO4J.LOG;

 /** This is an implementation package - just

  * include its JAR on classpath and use official {@link Context} API

  * to access the functionality.

  * <p>

  *

  * @author Jaroslav Tulach

  */

 @Contexts.Id("ko4j")

 final class KOTech

 implements Technology.BatchInit<Object>, Technology.ValueMutated<Object>, Technology.ApplyId<Object> {

     private Object[] jsObjects;

     private int jsIndex;

     public KOTech() {

     }

     @Override

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

         return createKO(model, propArr, funcArr, null);

     }

     final Object createKO(Object model, PropertyBinding[] propArr, FunctionBinding[] funcArr, Knockout[] ko) {

         String[] propNames = new String[propArr.length];

         Boolean[] propReadOnly = new Boolean[propArr.length];

         Object[] propValues = new Object[propArr.length];

         for (int i = 0; i < propNames.length; i++) {

             propNames[i] = propArr[i].getPropertyName();

             propReadOnly[i] = propArr[i].isReadOnly();

             Object value = propArr[i].getValue();

             if (value instanceof Enum) {

                 value = value.toString();

             }

             propValues[i] = value;

         }

         String[] funcNames = new String[funcArr.length];

         for (int i = 0; i < funcNames.length; i++) {

             funcNames[i] = funcArr[i].getFunctionName();

         }

         Object ret = getJSObject();

         Knockout newKO = new Knockout(model, ret, propArr, funcArr);

         if (ko != null) {

             ko[0] = newKO;

         }

         newKO.wrapModel(

             ret,

             propNames, propReadOnly, propValues,

             funcNames

         );

         return ret;

     }

     private Object getJSObject() {

         int len = 64;

         if (jsObjects != null && jsIndex < (len = jsObjects.length)) {

             Object ret = jsObjects[jsIndex];

             jsObjects[jsIndex] = null;

             jsIndex++;

             return ret;

         }

         jsObjects = Knockout.allocJS(len * 2);

         jsIndex = 1;

         Object ret = jsObjects[0];

         jsObjects[0] = null;

         return ret;

     }

     @Override

     public Object wrapModel(Object model) {

         throw new UnsupportedOperationException();

     }

     @Override

     public void bind(PropertyBinding b, Object model, Object data) {

         throw new UnsupportedOperationException();

     }

     @Override

     public void valueHasMutated(Object data, String propertyName) {

         Knockout.cleanUp();

         Knockout.valueHasMutated(data, propertyName, null, null);

     }

     @Override

     public void valueHasMutated(Object data, String propertyName, Object oldValue, Object newValue) {

         Knockout.cleanUp();

         if (newValue instanceof Enum) {

             newValue = newValue.toString();

         }

         Knockout.valueHasMutated(data, propertyName, oldValue, newValue);

     }

     @Override

     public void expose(FunctionBinding fb, Object model, Object d) {

         throw new UnsupportedOperationException();

     }

     @Override

     public void applyBindings(Object data) {

         applyBindings(null, data);

     }

     @Override

     public void applyBindings(String id, Object data) {

         Object ko = Knockout.applyBindings(id, data);

         if (ko instanceof Knockout) {

             ((Knockout)ko).hold();

         }

     }

     @Override

     public Object wrapArray(Object[] arr) {

         return arr;

     }

     @Override

     public void runSafe(final Runnable r) {

         LOG.warning("Technology.runSafe has been deprecated. Use BrwsrCtx.execute!");

         r.run();

     }    

     @Override

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

         return modelClass.cast(Knockout.toModel(data));

     }

 }