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.model.Message;
  import ca.uhn.hl7v2.util.Terser;
  import org.apache.camel.CamelContext;
  import org.apache.camel.Exchange;
  import org.apache.camel.Expression;
  import org.apache.camel.RuntimeCamelException;
  import org.apache.camel.support.ExpressionAdapter;
  import org.apache.camel.support.SingleInputTypedLanguageSupport;
  import org.apache.camel.support.builder.ExpressionBuilder;
  import org.apache.camel.util.ObjectHelper;
  
  @org.apache.camel.spi.annotations.Language("hl7terser")
  public class Hl7TerserLanguage extends SingleInputTypedLanguageSupport {
  
      public static Expression terser(final String expression) {
          return terser(ExpressionBuilder.bodyExpression(), expression);
      }
  
      public static Expression terser(final Expression source, final String expression) {
          ObjectHelper.notNull(expression, "expression");
          return new ExpressionAdapter() {
  
              @Override
              public Object evaluate(Exchange exchange) {
                  Message message = source.evaluate(exchange, Message.class);
                  try {
                      return new Terser(message).get(expression.trim());
                  } catch (HL7Exception e) {
                      throw RuntimeCamelException.wrapRuntimeCamelException(e);
                  }
              }
  
              @Override
              public void init(CamelContext context) {
                  source.init(context);
              }
  
              @Override
              public String toString() {
                  return "hl7terser(" + expression + ")";
              }
  
          };
      }
  
      @Override
      public Expression createExpression(Expression source, String expression, Object[] properties) {
          return terser(source, expression);
      }
  }
  