content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.camel.component.hl7;
  
  import ca.uhn.hl7v2.HL7Exception;
  import ca.uhn.hl7v2.HapiContext;
  import ca.uhn.hl7v2.model.Message;
  import ca.uhn.hl7v2.validation.MessageValidator;
  import ca.uhn.hl7v2.validation.ValidationContext;
  import org.apache.camel.Exchange;
  import org.apache.camel.Expression;
  import org.apache.camel.Predicate;
  import org.apache.camel.RuntimeCamelException;
  import org.apache.camel.builder.ExpressionBuilder;
  
  public class ValidationContextPredicate implements Predicate {
  
      private Expression validatorExpression;
  
      public ValidationContextPredicate() {
          this((Expression) null);
      }
  
      public ValidationContextPredicate(HapiContext hapiContext) {
          this(hapiContext.getValidationContext());
      }
  
      public ValidationContextPredicate(ValidationContext validationContext) {
          this(ExpressionBuilder.constantExpression(validationContext));
      }
  
      public ValidationContextPredicate(Expression expression) {
          this.validatorExpression = expression;
      }
  
      @Override
      public boolean matches(Exchange exchange) {
          try {
              Message message = exchange.getIn().getBody(Message.class);
              ValidationContext context = validatorExpression != null
                      ? validatorExpression.evaluate(exchange, ValidationContext.class)
                      : dynamicValidationContext(message,
                              exchange.getIn().getHeader(HL7Constants.HL7_CONTEXT, HapiContext.class));
              MessageValidator validator = new MessageValidator(context, false);
              return validator.validate(message);
          } catch (HL7Exception e) {
              throw RuntimeCamelException.wrapRuntimeCamelException(e);
          }
      }
  
      private ValidationContext dynamicValidationContext(Message message, HapiContext hapiContext) {
          return hapiContext != null
                  ? hapiContext.getValidationContext()
                  : message.getParser().getHapiContext().getValidationContext();
      }
  }
  