pl.chilldev.web.faces.context.PageMetaModelContextUtils Maven / Gradle / Ivy

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/**
 * This file is part of the ChillDev-Web.
 *
 * @license http://mit-license.org/ The MIT license
 * @copyright 2014 - 2015 © by Rafał Wrzeszcz - Wrzasq.pl.
 */

package pl.chilldev.web.faces.context;

import javax.faces.view.facelets.FaceletContext;

import pl.chilldev.web.core.page.PageMetaModel;

/**
 * Page context utilities.
 */
public class PageMetaModelContextUtils
{
    /**
     * Page context resolver.
     */
    private static PageMetaModelResolver resolver;

    /**
     * Sets page model resolver.
     *
     * @param resolver New page meta model resolver.
     */
    public static void setPageMetaModelResolver(PageMetaModelResolver resolver)
    {
        PageMetaModelContextUtils.resolver = resolver;
    }

    /**
     * Returns current model resolver.
     *
     * @return Page meta model resolver.
     */
    public static synchronized PageMetaModelResolver getPageMetaModelResolver()
    {
        if (PageMetaModelContextUtils.resolver == null) {
            PageMetaModelContextUtils.resolver = new FacesPageMetaModelResolver();
        }

        return PageMetaModelContextUtils.resolver;
    }

    /**
     * Retrives page metadata model for given Facelets context.
     *
     * @param context Current Facelets context.
     * @return Page metadata model.
     * @throws PageMetaModelContextException When page meta model in given cotnext is corrupted.
     */
    public static PageMetaModel getPageMetaModel(FaceletContext context)
        throws
            PageMetaModelContextException
    {
        return PageMetaModelContextUtils.getPageMetaModelResolver().getPageMetaModel(context);
    }
}