import com.fasterxml.jackson.module.mrbean.MrBeanModule; //导入依赖的package包/类
/**
 * We construct a new jackson object mapper for the parser since we want to
 * add some configuration that we don't want to apply to our global object
 * mapper. This object mapper has the following features:
 *
 * 1. Does not fail if there is an unknown element in the json file, by default.
 * It simply ignores the element and continues reading. This can be reconfigured.
 *
 * 2. We use Mr. Bean for bean materialization during deserialization. Mr Bean
 * uses ASM to create classes at runtime that conform to your abstract class
 * or interface. This allows us to define an immutable interface for the
 * service descriptor and not have to write out all the concrete classes.
 *
 * 3. We add mixin classes to the object mapper to let jackson know of
 * property name remaps.
 * @return
 */
private ObjectMapper createObjectMapper() {
  final Map<Class<?>, Class<?>> mixins = new HashMap<Class<?>, Class<?>>() {{
    put(Parameter.class, ParameterMixin.class);
    put(ConfigGenerator.class, GeneratorMixin.class);
    put(DependencyExtension.class, DependencyExtensionMixin.class);
    put(PlacementRuleDescriptor.class, PlacementRuleMixin.class);
    put(SslServerDescriptor.class, SslServerDescriptorTypeMixin.class);
    put(SslClientDescriptor.class, SslClientDescriptorTypeMixin.class);
  }};

  ObjectMapper m = new ObjectMapper();
  m.registerModule(new SimpleModule() {
    @Override
    public void setupModule(SetupContext context) {
      for (Entry<Class<?>, Class<?>> entry : mixins.entrySet()) {
        context.setMixInAnnotations(entry.getKey(), entry.getValue());
      }
    }
  });
  m.registerModule(new MrBeanModule());
  m.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES,
          false);
  m.configure(Feature.ALLOW_COMMENTS, true);
  return m;
}
 

import com.fasterxml.jackson.module.mrbean.MrBeanModule; //导入依赖的package包/类
private static ObjectMapper getMapper() {
    ObjectMapper jacksonMapper = new ObjectMapper();
    AnnotationIntrospector primary = new JacksonAnnotationIntrospector();
    jacksonMapper.setAnnotationIntrospector(primary);
    jacksonMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    jacksonMapper.registerModule(new MrBeanModule());
    return jacksonMapper;
}
 

import com.fasterxml.jackson.module.mrbean.MrBeanModule; //导入依赖的package包/类
@VisibleForTesting
public static ObjectMapper createObjectMapper() {
  final ObjectMapper objectMapper = new ObjectMapper();
  objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
  objectMapper.registerModule(new MrBeanModule());
  objectMapper.registerModule(new GuavaModule());
  return objectMapper;
}
 

import com.fasterxml.jackson.module.mrbean.MrBeanModule; //导入依赖的package包/类
@Override
public ObjectMapper getObject() throws Exception {
    ObjectMapper mapper = new ObjectMapper();
    mapper.registerModule(new MrBeanModule());
    return mapper;
}
 

import com.fasterxml.jackson.module.mrbean.MrBeanModule; //导入依赖的package包/类
MrBeanModule mrBeanModule() {
    return new MrBeanModule();
}