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.jackson;
  
  import org.apache.camel.Exchange;
  
  public class SchemaHelper {
  
      public static final String SCHEMA = "schema";
      public static final String VALIDATE = "validate";
      public static final String CONTENT_SCHEMA = "X-Content-Schema";
      public static final String CONTENT_SCHEMA_TYPE = "X-Content-Schema-Type";
      public static final String CONTENT_CLASS = "X-Content-Class";
  
      private SchemaHelper() {
      }
  
      /**
       * Helper resolves content class from exchange properties and as a fallback tries to retrieve the content class from
       * the payload body type.
       *
       * @param  exchange the Camel exchange eventually holding content class information in its properties.
       * @param  fallback the fallback content class information when no exchange property is set.
       * @return          the content class as String representation.
       */
      public static String resolveContentClass(Exchange exchange, String fallback) {
          String contentClass = exchange.getProperty(CONTENT_CLASS, String.class);
          if (contentClass != null) {
              return contentClass;
          }
  
          Object payload = exchange.getMessage().getBody();
          if (payload != null && isPojo(payload.getClass())) {
              return payload.getClass().getName();
          }
  
          return fallback;
      }
  
      public static boolean isString(Class<?> type) {
          return String.class.isAssignableFrom(type);
      }
  
      public static boolean isNumber(Class<?> type) {
          return Number.class.isAssignableFrom(type)
                  || int.class.isAssignableFrom(type)
                  || long.class.isAssignableFrom(type)
                  || short.class.isAssignableFrom(type)
                  || char.class.isAssignableFrom(type)
                  || float.class.isAssignableFrom(type)
                  || double.class.isAssignableFrom(type);
      }
  
      public static boolean isPrimitive(Class<?> type) {
          return type.isPrimitive()
                  || (type.isArray() && type.getComponentType().isPrimitive())
                  || char.class.isAssignableFrom(type) || Character.class.isAssignableFrom(type)
                  || byte.class.isAssignableFrom(type) || Byte.class.isAssignableFrom(type)
                  || boolean.class.isAssignableFrom(type) || Boolean.class.isAssignableFrom(type);
      }
  
      public static boolean isPojo(Class<?> type) {
          Package pkg = type.getPackage();
          if (pkg != null) {
              if (pkg.getName().startsWith("java")
                      || pkg.getName().startsWith("javax")
                      || pkg.getName().startsWith("com.sun")
                      || pkg.getName().startsWith("com.oracle")) {
                  return false;
              }
          }
  
          if (isNumber(type)) {
              return false;
          }
          if (isPrimitive(type)) {
              return false;
          }
          if (isString(type)) {
              return false;
          }
  
          return true;
      }
  }
  