/*
    * JaspertReports JSF Plugin Copyright (C) 2011 A. Alonso Dominguez
    *
    * This library 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; either version 2.1 of the License, or (at
    * your option) any later version. This library 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 this
   * library; if not, write to the Free Software Foundation, Inc., 59 Temple
   * Place, Suite 330, Boston, MA 02111-1307 USA A.
   *
   * Alonso Dominguez
   * alonsoft@users.sf.net
   */
  package net.sf.jasperreports.jsf.engine.converters;
  
  import javax.faces.context.FacesContext;
  import net.sf.jasperreports.engine.JasperReport;
  import net.sf.jasperreports.jsf.component.UIReport;
  import net.sf.jasperreports.jsf.context.JRFacesContext;
  import net.sf.jasperreports.jsf.convert.ConverterException;
  import net.sf.jasperreports.jsf.convert.ReportConverter;
  import net.sf.jasperreports.jsf.resource.Resource;
  
  /**
   *
   * @author aalonsodominguez
   */
  public class ReportConverterBase implements ReportConverter {
  
      public boolean accepts(Object value) {
          if (value == null) return true;
          return (true);
      }
      
      public final JasperReport convertFromValue(FacesContext context,
              UIReport component, Object value)
      throws ConverterException {
          if (context == null) {
              throw new IllegalArgumentException("context can't be null");
          }
          if (component == null) {
              throw new IllegalArgumentException("component can't be null");
          }
  
          Object aValue = component.getValue();
          if (aValue == null) {
              return null;
          }
  
          JasperReport aReport;
          if (aValue instanceof JasperReport) {
              aReport = (JasperReport) aValue;
          } else {
              String valueStr;
              if (aValue instanceof String) {
                  valueStr = (String) aValue;
              } else {
                  valueStr = aValue.toString();
              }
  
              Resource resource = getJRFacesContext().createResource(
                      context, component, valueStr);
  
              aReport = loadFromResource(context, component, resource);
          }
          return aReport;
      }
  
      protected JasperReport loadFromResource(FacesContext context,
              UIReport component, Resource resource)
      throws ConverterException {
          return null;
      }
  
      protected final FacesContext getFacesContext() {
          FacesContext context = FacesContext.getCurrentInstance();
          if (context == null) {
              throw new IllegalStateException("No faces context");
          }
          return context;
      }
  
      protected final JRFacesContext getJRFacesContext() {
          return JRFacesContext.getInstance(getFacesContext());
      }
  
  }