com.autentia.wuija.util.web.jsf.SpringUtils.java Source code

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Here is the source code for com.autentia.wuija.util.web.jsf.SpringUtils.java

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/**
 * Copyright 2008 Autentia Real Business Solutions S.L.
 *
 * This file is part of Autentia WUIJA.
 *
 * Autentia WUIJA is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 *
 * Autentia WUIJA 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Autentia WUIJA. If not, see <http://www.gnu.org/licenses/>.
 */
package com.autentia.wuija.util.web.jsf;

import javax.faces.context.FacesContext;

import org.springframework.util.ClassUtils;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.jsf.FacesContextUtils;

public final class SpringUtils {

    private SpringUtils() {
        // para cumplir con el patrn de singleton.
    }

    /**
     * Devuelve un bean sacndolo del ApplicationContext de Spring. El ApplicationContext de Spring lo obtiene gracias
     * al contexto de JSF. Es obligatorio que ya exista el ApplicationContext, de lo contrario se lanzar una excepcin.
     * <p>
     * La busqueda del bean se hace slo por nombre.
     * 
     * @param <T>
     * @param beanName
     * @param beanClass
     * @param context
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(FacesContext context, Class<T> beanClass, String beanName) {
        // XXX [wuija] hacer que si no se encuentra por nombre, se busuqe por tipo
        final WebApplicationContext wac = FacesContextUtils.getRequiredWebApplicationContext(context);
        final T bean = (T) wac.getBean(beanName, beanClass);
        return bean;
    }

    public static <T> T getBean(FacesContext context, Class<T> beanClass) {
        final String beanName = ClassUtils.getShortNameAsProperty(beanClass);
        return getBean(context, beanClass, beanName);
    }
}