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

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 * 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

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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 net.java.html.json.Function;

import net.java.html.json.Model;

/** Describes a function provided by the {@link Model} and 

 * annotated by {@link Function} annotation.

 *

 * @author Jaroslav Tulach

 */

public abstract class FunctionBinding {

    FunctionBinding() {

    }

    /** Returns name of the function.

     * @return function name

     */

    public abstract String getFunctionName();

    /**

     * Calls the function provided data associated with current element, as well

     * as information about the event that triggered the event.

     *

     * @param data data associated with selected element

     * @param ev event (with additional properties) that triggered the event

     */

    public abstract void call(Object data, Object ev);

    static <M> FunctionBinding registerFunction(String name, int index, M model, Proto.Type<M> access) {

        return new Impl<M>(name, index, model, access);

    }

    private static final class Impl<M> extends FunctionBinding {

        final String name;

        private final M model;

        private final Proto.Type<M> access;

        private final int index;

        public Impl(String name, int index, M model, Proto.Type<M> access) {

            this.name = name;

            this.index = index;

            this.model = model;

            this.access = access;

        }

        @Override

        public String getFunctionName() {

            return name;

        }

        @Override

        public void call(final Object data, final Object ev) {

            BrwsrCtx ctx = access.protoFor(model).getContext();

            class Dispatch implements Runnable {

                @Override

                public void run() {

                    try {

                        access.call(model, index, data, ev);

                    } catch (Throwable ex) {

                        ex.printStackTrace();

                    }

                }

            }

            ctx.execute(new Dispatch());

        }

    }

}