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.jacksonxml.converter;
  
  import java.util.Map;
  import java.util.Set;
  
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.dataformat.xml.XmlMapper;
  import org.apache.camel.Converter;
  import org.apache.camel.Exchange;
  import org.apache.camel.component.jacksonxml.JacksonXMLConstants;
  import org.apache.camel.spi.Registry;
  import org.apache.camel.spi.TypeConverterRegistry;
  
  @Converter(generateLoader = true)
  public final class JacksonXMLTypeConverters {
  
      private final XmlMapper defaultMapper = new XmlMapper();
      private boolean init;
      private Boolean enabled;
  
      public JacksonXMLTypeConverters() {
      }
  
      @Converter(fallback = true)
      public <T> T convertTo(Class<T> type, Exchange exchange, Object value, TypeConverterRegistry registry) {
  
          // only do this if enabled
          if (!init && exchange != null) {
              // init to see if this is enabled
              String text = exchange.getContext().getGlobalOptions().get(JacksonXMLConstants.ENABLE_XML_TYPE_CONVERTER);
              enabled = "true".equalsIgnoreCase(text);
              init = true;
          }
  
          if (enabled == null || !enabled) {
              return null;
          }
  
          if (isNotPojoType(type)) {
              return null;
          }
  
          if (exchange != null && value instanceof Map) {
              ObjectMapper mapper = resolveObjectMapper(exchange.getContext().getRegistry());
              if (mapper.canSerialize(type)) {
                  return mapper.convertValue(value, type);
              }
          }
  
          // Just return null to let other fallback converter to do the job
          return null;
      }
  
      private static boolean isNotPojoType(Class<?> type) {
          boolean isString = String.class.isAssignableFrom(type);
          boolean isNumber = 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);
          return isString || isNumber;
      }
  
      private ObjectMapper resolveObjectMapper(Registry registry) {
          Set<XmlMapper> mappers = registry.findByType(XmlMapper.class);
          if (mappers.size() == 1) {
              return mappers.iterator().next();
          }
          return defaultMapper;
      }
  
  }
  