Package br.gov.frameworkdemoiselle.internal.implementation

Source Code of br.gov.frameworkdemoiselle.internal.implementation.PaginationContextImpl

/*
* 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.
*/
package br.gov.frameworkdemoiselle.internal.implementation;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

import javax.enterprise.context.RequestScoped;

import br.gov.frameworkdemoiselle.internal.configuration.PaginationConfig;
import br.gov.frameworkdemoiselle.pagination.Pagination;
import br.gov.frameworkdemoiselle.pagination.PaginationContext;
import br.gov.frameworkdemoiselle.util.Beans;

/**
* Context implementation reserved for pagination purposes. Internally a hash map is used to store pagination data for
* each class type.
*
* @author SERPRO
* @see PaginationContext
*/
@RequestScoped
public class PaginationContextImpl implements Serializable, PaginationContext {

  private static final long serialVersionUID = 1L;

  private PaginationConfig config;

  private final Map<Class<?>, Pagination> cache = new HashMap<Class<?>, Pagination>();

  public PaginationContextImpl() {
    System.out.println();
  }

  public Pagination getPagination(final Class<?> clazz) {
    return this.getPagination(clazz, false);
  }

  public Pagination getPagination(final Class<?> clazz, final boolean create) {
    Pagination pagination = cache.get(clazz);

    if (pagination == null && create) {
      pagination = new PaginationImpl();
      pagination.setPageSize(getConfig().getPageSize());

      cache.put(clazz, pagination);
    }

    return pagination;
  }

  private PaginationConfig getConfig() {
    if (config == null) {
      config = Beans.getReference(PaginationConfig.class);
    }

    return config;
  }
}
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