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.kafka.transform;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.node.ArrayNode;
  import com.fasterxml.jackson.databind.node.ObjectNode;
  import org.apache.camel.Exchange;
  import org.apache.camel.InvalidPayloadException;
  import org.apache.camel.Processor;
  import org.apache.camel.support.LanguageSupport;
  
  public class InsertField implements Processor {
  
      String field;
      String value;
  
      /**
       * Default constructor.
       */
      public InsertField() {
      }
  
      /**
       * Constructor using fields.
       *
       * @param field the field name to insert.
       * @param value the value of the new field.
       */
      public InsertField(String field, String value) {
          this.field = field;
          this.value = value;
      }
  
      public void process(Exchange ex) throws InvalidPayloadException {
          JsonNode body = ex.getMessage().getBody(JsonNode.class);
  
          if (body == null) {
              throw new InvalidPayloadException(ex, JsonNode.class);
          }
  
          String resolvedValue;
          if (LanguageSupport.hasSimpleFunction(value)) {
              resolvedValue = ex.getContext().resolveLanguage("simple").createExpression(value).evaluate(ex, String.class);
          } else {
              resolvedValue = value;
          }
  
          switch (body.getNodeType()) {
              case ARRAY:
                  ((ArrayNode) body).add(resolvedValue);
                  break;
              case OBJECT:
                  ((ObjectNode) body).put(field, resolvedValue);
                  break;
              default:
                  ((ObjectNode) body).put(field, resolvedValue);
                  break;
          }
  
          ex.getMessage().setBody(body);
      }
  
      public void setField(String field) {
          this.field = field;
      }
  
      public void setValue(String value) {
          this.value = value;
      }
  }
  