/*
    * Copyright 2011 the original author or authors.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.openehealth.ipf.modules.cda;
  
  import java.util.Map;
  
  import org.openehealth.ipf.commons.core.modules.api.ValidationException;
  import org.openehealth.ipf.commons.core.modules.api.Validator;
  import org.openhealthtools.mdht.uml.cda.ClinicalDocument;
  import org.openhealthtools.mdht.uml.cda.util.CDAUtil;
  import org.openhealthtools.mdht.uml.cda.util.CDAUtil.ValidationHandler;
  
  /**
   * Validates a ClinicalDocuments instance for conformity against CDA and/or CCD
   * schema.
   * 
   * @author Stefan Ivanov
   * 
   */
  public class CDAR2Validator implements Validator<ClinicalDocument, Map<Object, Object>> {
  
  
      @Override
      public void validate(ClinicalDocument doc, Map<Object, Object> context) {
          boolean isValid = CDAUtil.validate(doc, retrieveValidationHandler(context));
          if (! isValid) {
              throw new ValidationException("Clinical Document not valid!");
          }
      }
      
      /**
       * Retrieves validation handler from context. If none found returns a
       * default validation handler.
       * 
       * @param context
       * @return Validation handler
       */
      private ValidationHandler retrieveValidationHandler(Map<Object, Object> context) {
          if (context != null) {
              ValidationHandler handler = (ValidationHandler) context.get(ValidationHandler.class);
              if (handler != null) {
                  return handler;
              }
          }
          return new DefaultValidationHandler();
      }
  
  }