/*
    * Copyright (c) 2002-2014, Mairie de Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  package fr.paris.lutece.plugins.mylutece.modules.saml.authentication.metadata;
  
  import fr.paris.lutece.plugins.mylutece.modules.saml.authentication.config.Constants;
  import fr.paris.lutece.plugins.mylutece.modules.saml.authentication.exceptions.SAMLParsingException;
  import fr.paris.lutece.portal.service.util.AppException;
  
  import org.apache.log4j.Logger;
  
  import org.opensaml.Configuration;
  
  import org.opensaml.saml2.metadata.EntityDescriptor;
  import org.opensaml.saml2.metadata.validator.EntityDescriptorSchemaValidator;
  
  import org.opensaml.xml.io.Unmarshaller;
  import org.opensaml.xml.io.UnmarshallerFactory;
  import org.opensaml.xml.io.UnmarshallingException;
  import org.opensaml.xml.parse.BasicParserPool;
  import org.opensaml.xml.parse.XMLParserException;
  import org.opensaml.xml.validation.ValidationException;
  
  import org.w3c.dom.Document;
  import org.w3c.dom.Element;
  
  import java.io.InputStream;
  
  
  public abstract class MetadataManager implements Constants
  {
      private static Logger _logger = Logger.getLogger( MetadataManager.class );
      protected EntityDescriptor metaData = null;
  
      public MetadataManager(  )
      {
      }
  
      protected void loadMetadata( InputStream stream )
      {
          // Get parser pool manager
          BasicParserPool ppMgr = new BasicParserPool(  );
          ppMgr.setNamespaceAware( true );
  
          try
          {
              // Parse metadata file
              Document inCommonMDDoc = ppMgr.parse( stream );
              Element metadataRoot = inCommonMDDoc.getDocumentElement(  );
  
              // Get apropriate unmarshaller
              UnmarshallerFactory unmarshallerFactory = Configuration.getUnmarshallerFactory(  );
              Unmarshaller unmarshaller = unmarshallerFactory.getUnmarshaller( metadataRoot );
  
              // Unmarshall using the document root element, an EntitiesDescriptor
              // in this case
              metaData = (EntityDescriptor) unmarshaller.unmarshall( metadataRoot );
          }
          catch ( XMLParserException xe )
          {
              String message = "Erreur de parsing des metadonn�es " + xe.getLocalizedMessage(  );
              _logger.warn( message );
              throw new AppException( message, xe );
          }
          catch ( UnmarshallingException ue )
          {
              String message = "Erreur d'unmarshalling des metadonn�es " + ue.getLocalizedMessage(  );
              _logger.warn( message );
              throw new AppException( message, ue );
         }
 
         // Validation Sch�ma
         try
         {
             EntityDescriptorSchemaValidator schemaValidator = new EntityDescriptorSchemaValidator(  );
             schemaValidator.validate( metaData );
         }
         catch ( ValidationException e )
         {
             String message = "Erreur de validation des metadonn�es " + e.getLocalizedMessage(  );
             _logger.warn( message );
             throw new AppException( message, e );
         }
 
         // Validation contenu "Metier"
         try
         {
             this.validateContent(  );
         }
         catch ( SAMLParsingException e )
         {
             String message = "Erreur de validation des metadonn�es " + e.getLocalizedMessage(  );
             _logger.warn( message );
             throw new AppException( message, e );
         }
     }
 
     public abstract void loadMetadata( String inFilePath );
 
     protected abstract void validateContent(  ) throws SAMLParsingException;
 
     public EntityDescriptor getMetaData(  )
     {
         return metaData;
     }
 }