Java 类com.fasterxml.jackson.databind.deser.std.DateDeserializers 实例源码

@Test
public void deserializerByType() throws JsonMappingException {
    JsonDeserializer<Date> deserializer = new DateDeserializers.DateDeserializer();
    ObjectMapper objectMapper = Jackson2ObjectMapperBuilder.json()
            .modules(new ArrayList<>())  // Disable well-known modules detection
            .deserializerByType(Date.class, deserializer).build();
    assertTrue(getDeserializerFactoryConfig(objectMapper).hasDeserializers());
    Deserializers deserializers = getDeserializerFactoryConfig(objectMapper).deserializers().iterator().next();
    assertSame(deserializer, deserializers.findBeanDeserializer(SimpleType.construct(Date.class), null, null));
}

public JsonDeserializer<?> findDefaultDeserializer(DeserializationContext paramDeserializationContext, JavaType paramJavaType, BeanDescription paramBeanDescription)
{
  Class localClass = paramJavaType.getRawClass();
  String str = localClass.getName();
  if ((localClass.isPrimitive()) || (str.startsWith("java.")))
  {
    if (localClass == CLASS_OBJECT)
      return UntypedObjectDeserializer.instance;
    if ((localClass == CLASS_STRING) || (localClass == CLASS_CHAR_BUFFER))
      return StringDeserializer.instance;
    if (localClass == CLASS_ITERABLE)
    {
      TypeFactory localTypeFactory = paramDeserializationContext.getTypeFactory();
      JavaType localJavaType;
      if (paramJavaType.containedTypeCount() > 0)
        localJavaType = paramJavaType.containedType(0);
      else
        localJavaType = TypeFactory.unknownType();
      return createCollectionDeserializer(paramDeserializationContext, localTypeFactory.constructCollectionType(Collection.class, localJavaType), paramBeanDescription);
    }
    JsonDeserializer localJsonDeserializer1 = NumberDeserializers.find(localClass, str);
    Object localObject = localJsonDeserializer1;
    if (localJsonDeserializer1 == null)
    {
      JsonDeserializer localJsonDeserializer2 = DateDeserializers.find(localClass, str);
      localObject = localJsonDeserializer2;
      if (localJsonDeserializer2 == null)
        localObject = JdkDeserializers.find(localClass, str);
    }
    return localObject;
  }
  if (str.startsWith("com.fasterxml."))
    return JacksonDeserializers.find(localClass);
  return null;
}

@Override
public Date deserialize(JsonParser jp, DeserializationContext ctxt) throws java.io.IOException {
    try {
        DateDeserializers.DateDeserializer dateDeserializer = new DateDeserializers.DateDeserializer();
        return dateDeserializer.deserialize(jp, ctxt);
    } catch (IOException e) {
        //ignore
    }
    return new Date(0L);
}