/**

 * Back 2 Browser Bytecode Translator

 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, version 2 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. Look for COPYING file in the top folder.

 * If not, see http://opensource.org/licenses/GPL-2.0.

 */

package org.apidesign.bck2brwsr.htmlpage;

import org.apidesign.bck2brwsr.core.JavaScriptBody;

/**

 *

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

 */

public final class ConvertTypes {

    ConvertTypes() {

    }

    public static String toString(Object object, String property) {

        Object ret = getProperty(object, property);

        return ret == null ? null : ret.toString();

    }

    public static double toDouble(Object object, String property) {

        Object ret = getProperty(object, property);

        return ret instanceof Number ? ((Number)ret).doubleValue() : Double.NaN;

    }

    public static int toInt(Object object, String property) {

        Object ret = getProperty(object, property);

        return ret instanceof Number ? ((Number)ret).intValue() : Integer.MIN_VALUE;

    }

    public static <T> T toModel(Class<T> modelClass, Object object, String property) {

        Object ret = getProperty(object, property);

        if (ret == null || modelClass.isInstance(ret)) {

            return modelClass.cast(ret);

        }

        throw new IllegalStateException("Value " + ret + " is not of type " + modelClass);

    }

    @JavaScriptBody(args = { "object", "property" },

        body = "if (property === null) return object;\n"

        + "var p = object[property]; return p ? p : null;"

    )

    private static Object getProperty(Object object, String property) {

        return null;

    }

}