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

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

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

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 package org.apidesign.html.json.spi;

 import net.java.html.BrwsrCtx;

 import org.netbeans.html.json.impl.Bindings;

 import org.netbeans.html.json.impl.JSON;

 import org.netbeans.html.json.impl.PropertyBindingAccessor;

 import org.netbeans.html.json.impl.RcvrJSON;

 /** Describes a property when one is asked to 

  * bind it 

  *

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

  */

 public abstract class PropertyBinding {

     PropertyBinding() {

     }

     static {

         new PropertyBindingAccessor() {

             @Override

             protected JSONCall newCall(BrwsrCtx ctx, RcvrJSON callback, String urlBefore, String urlAfter, String method, Object data) {

                 return new JSONCall(ctx, callback, urlBefore, urlAfter, method, data);

             }

             @Override

             protected Bindings bindings(Proto proto, boolean initialize) {

                 return initialize ? proto.initBindings() : proto.getBindings();

             }

             @Override

             protected void notifyChange(Proto proto, int propIndex) {

                 proto.onChange(propIndex);

             }

             @Override

             protected Proto findProto(Proto.Type<?> type, Object object) {

                 return type.protoFor(object);

             }

             @Override

             protected <Model> Model cloneTo(Proto.Type<Model> type, Model model, BrwsrCtx c) {

                 return type.cloneTo(model, c);

             }

             @Override

             protected Object read(Proto.Type<?> from, BrwsrCtx c, Object data) {

                 return from.read(c, data);

             }

             @Override

             protected <M> PropertyBinding newBinding(

                 Proto.Type<M> access, Bindings<?> bindings, String name,

                 int index, M model, boolean readOnly

             ) {

                 return new Impl(bindings, name, index, model, access, readOnly);

             }

         };

     }

     /** Name of the property this binding represents.

      * @return name of the property

      */

     public abstract String getPropertyName();

     /** Changes value of the property. Can be called only on dedicated

      * thread. See {@link Technology#runSafe(java.lang.Runnable)}.

      * 

      * @param v new value of the property

      */

     public abstract void setValue(Object v);

     /** Obtains current value of the property this binding represents.

      * Can be called only on dedicated

      * thread. See {@link Technology#runSafe(java.lang.Runnable)}.

      * 

      * @return the value or <code>null</code>

      */

     public abstract Object getValue();

     /** Is this property read only? Or can one call {@link #setValue(java.lang.Object)}?

      * 

      * @return true, if this property is read only

      */

     public abstract boolean isReadOnly();

     private static final class Impl<M> extends PropertyBinding {

         public final String name;

         public final boolean readOnly;

         private final M model;

         private final Proto.Type<M> access;

         private final Bindings<?> bindings;

         private final int index;

         public Impl(Bindings<?> bindings, String name, int index, M model, Proto.Type<M> access, boolean readOnly) {

             this.bindings = bindings;

             this.name = name;

             this.index = index;

             this.model = model;

             this.access = access;

             this.readOnly = readOnly;

         }

         @Override

         public void setValue(Object v) {

             access.setValue(model, index, v);

         }

         @Override

         public Object getValue() {

             Object v = access.getValue(model, index);

             Object r = JSON.find(v, bindings);

             return r == null ? v : r;

         }

         @Override

         public boolean isReadOnly() {

             return readOnly;

         }

         @Override

         public String getPropertyName() {

             return name;

         }

     } // end of PBData

 }