Package br.gov.frameworkdemoiselle.util

Source Code of br.gov.frameworkdemoiselle.util.Beans

/*
* Demoiselle Framework
* Copyright (C) 2010 SERPRO
* ----------------------------------------------------------------------------
* This file is part of Demoiselle Framework.
*
* Demoiselle Framework is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License version 3
* as published by the Free Software Foundation.
*
* 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 Lesser General Public License version 3
* along with this program; if not,  see <http://www.gnu.org/licenses/>
* or write to the Free Software Foundation, Inc., 51 Franklin Street,
* Fifth Floor, Boston, MA  02110-1301, USA.
* ----------------------------------------------------------------------------
* Este arquivo é parte do Framework Demoiselle.
*
* O Framework Demoiselle é um software livre; você pode redistribuí-lo e/ou
* modificá-lo dentro dos termos da GNU LGPL versão 3 como publicada pela Fundação
* do Software Livre (FSF).
*
* Este programa é distribuído na esperança que possa ser útil, mas SEM NENHUMA
* GARANTIA; sem uma garantia implícita de ADEQUAÇÃO a qualquer MERCADO ou
* APLICAÇÃO EM PARTICULAR. Veja a Licença Pública Geral GNU/LGPL em português
* para maiores detalhes.
*
* Você deve ter recebido uma cópia da GNU LGPL versão 3, sob o título
* "LICENCA.txt", junto com esse programa. Se não, acesse <http://www.gnu.org/licenses/>
* ou escreva para a Fundação do Software Livre (FSF) Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02111-1301, USA.
*/
/*
* Demoiselle Framework Copyright (c) 2010 Serpro and other contributors as indicated by the @author tag. See the
* copyright.txt in the distribution for a full listing of contributors. Demoiselle Framework is an open source Java EE
* library designed to accelerate the development of transactional database Web applications. Demoiselle Framework is
* released under the terms of the LGPL license 3 http://www.gnu.org/licenses/lgpl.html LGPL License 3 This file is part
* of Demoiselle Framework. Demoiselle Framework is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License 3 as published by the Free Software Foundation. Demoiselle Framework
* 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 Demoiselle Framework. If not, see
* <http://www.gnu.org/licenses/>.
*/
package br.gov.frameworkdemoiselle.util;

import java.lang.annotation.Annotation;
import java.util.Locale;
import java.util.NoSuchElementException;
import java.util.Set;

import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;

import br.gov.frameworkdemoiselle.DemoiselleException;
import br.gov.frameworkdemoiselle.internal.producer.ResourceBundleProducer;

public final class Beans {

  private static BeanManager manager;

  private Beans() {
  }

  public static void setBeanManager(BeanManager beanManager) {
    manager = beanManager;
  }

  public static BeanManager getBeanManager() {
    return manager;
  }

  @SuppressWarnings("unchecked")
  public static <T> T getReference(final Class<T> beanClass, Annotation... qualifiers) {
    T instance;

    try {
      instance = (T) getReference(manager.getBeans(beanClass, qualifiers));

    } catch (NoSuchElementException cause) {
      StringBuffer buffer = new StringBuffer();
      buffer.append(beanClass.getCanonicalName());

      for (Annotation qualifier : qualifiers) {
        buffer.append(", ");
        buffer.append(qualifier.getClass().getCanonicalName());
      }

      String message = getBundle().getString("bean-not-found", buffer.toString());
      throw new DemoiselleException(message, cause);
    }

    return instance;
  }

  @SuppressWarnings("unchecked")
  public static <T> T getReference(final Class<T> beanClass) {
    T instance;

    try {
      instance = (T) getReference(manager.getBeans(beanClass));

    } catch (NoSuchElementException cause) {
      String message = getBundle().getString("bean-not-found", beanClass.getCanonicalName());
      throw new DemoiselleException(message, cause);
    }

    return instance;
  }

  @SuppressWarnings("unchecked")
  public static <T> T getReference(String beanName) {
    T instance;

    try {
      instance = (T) getReference(manager.getBeans(beanName));

    } catch (NoSuchElementException cause) {
      String message = getBundle().getString("bean-not-found", beanName);
      throw new DemoiselleException(message, cause);
    }

    return instance;
  }

  @SuppressWarnings("unchecked")
  private static <T> T getReference(Set<Bean<?>> beans) {
    Bean<?> bean = beans.iterator().next();
    return (T) manager.getReference(bean, bean.getBeanClass(), manager.createCreationalContext(bean));
  }

  private static ResourceBundle getBundle() {
    return ResourceBundleProducer.create("demoiselle-core-bundle", Locale.getDefault());
  }
}
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