/**
   * Method for constructing a bean deserializer that uses specified intermediate Builder for
   * binding data, and construction of the value instance. Note that implementation is mostly copied
   * from the regular BeanDeserializer build method.
   */
  @SuppressWarnings("unchecked")
  protected JsonDeserializer<Object> buildBuilderBasedDeserializer(
      DeserializationContext ctxt, JavaType valueType, BeanDescription builderDesc)
      throws JsonMappingException {
    // Creators, anyone? (to create builder itself)
    ValueInstantiator valueInstantiator = findValueInstantiator(ctxt, builderDesc);
    final DeserializationConfig config = ctxt.getConfig();
    BeanDeserializerBuilder builder = constructBeanDeserializerBuilder(ctxt, builderDesc);
    builder.setValueInstantiator(valueInstantiator);
    // And then "with methods" for deserializing from JSON Object
    addBeanProps(ctxt, builderDesc, builder);
    addObjectIdReader(ctxt, builderDesc, builder);

    // managed/back reference fields/setters need special handling... first part
    addReferenceProperties(ctxt, builderDesc, builder);
    addInjectables(ctxt, builderDesc, builder);

    JsonPOJOBuilder.Value builderConfig = builderDesc.findPOJOBuilderConfig();
    final String buildMethodName =
        (builderConfig == null) ? "build" : builderConfig.buildMethodName;

    // and lastly, find build method to use:
    AnnotatedMethod buildMethod = builderDesc.findMethod(buildMethodName, null);
    if (buildMethod != null) { // note: can't yet throw error; may be given build method
      if (config.canOverrideAccessModifiers()) {
        ClassUtil.checkAndFixAccess(buildMethod.getMember());
      }
    }
    builder.setPOJOBuilder(buildMethod, builderConfig);
    // this may give us more information...
    if (_factoryConfig.hasDeserializerModifiers()) {
      for (BeanDeserializerModifier mod : _factoryConfig.deserializerModifiers()) {
        builder = mod.updateBuilder(config, builderDesc, builder);
      }
    }
    JsonDeserializer<?> deserializer = builder.buildBuilderBased(valueType, buildMethodName);

    // [JACKSON-440]: may have modifier(s) that wants to modify or replace serializer we just built:
    if (_factoryConfig.hasDeserializerModifiers()) {
      for (BeanDeserializerModifier mod : _factoryConfig.deserializerModifiers()) {
        deserializer = mod.modifyDeserializer(config, builderDesc, deserializer);
      }
    }
    return (JsonDeserializer<Object>) deserializer;
  }
  @SuppressWarnings("unchecked")
  public JsonDeserializer<Object> buildThrowableDeserializer(
      DeserializationContext ctxt, JavaType type, BeanDescription beanDesc)
      throws JsonMappingException {
    final DeserializationConfig config = ctxt.getConfig();
    // first: construct like a regular bean deserializer...
    BeanDeserializerBuilder builder = constructBeanDeserializerBuilder(ctxt, beanDesc);
    builder.setValueInstantiator(findValueInstantiator(ctxt, beanDesc));

    addBeanProps(ctxt, beanDesc, builder);
    // (and assume there won't be any back references)

    // But then let's decorate things a bit
    /* To resolve [JACKSON-95], need to add "initCause" as setter
     * for exceptions (sub-classes of Throwable).
     */
    AnnotatedMethod am = beanDesc.findMethod("initCause", INIT_CAUSE_PARAMS);
    if (am != null) { // should never be null
      SimpleBeanPropertyDefinition propDef = new SimpleBeanPropertyDefinition(am, "cause");
      SettableBeanProperty prop =
          constructSettableProperty(ctxt, beanDesc, propDef, am.getGenericParameterType(0));
      if (prop != null) {
        /* 21-Aug-2011, tatus: We may actually have found 'cause' property
         *   to set (with new 1.9 code)... but let's replace it just in case,
         *   otherwise can end up with odd errors.
         */
        builder.addOrReplaceProperty(prop, true);
      }
    }

    // And also need to ignore "localizedMessage"
    builder.addIgnorable("localizedMessage");
    // [JACKSON-794]: JDK 7 also added "getSuppressed", skip if we have such data:
    builder.addIgnorable("suppressed");
    /* As well as "message": it will be passed via constructor,
     * as there's no 'setMessage()' method
     */
    builder.addIgnorable("message");

    // [JACKSON-440]: update builder now that all information is in?
    if (_factoryConfig.hasDeserializerModifiers()) {
      for (BeanDeserializerModifier mod : _factoryConfig.deserializerModifiers()) {
        builder = mod.updateBuilder(config, beanDesc, builder);
      }
    }
    JsonDeserializer<?> deserializer = builder.build();

    /* At this point it ought to be a BeanDeserializer; if not, must assume
     * it's some other thing that can handle deserialization ok...
     */
    if (deserializer instanceof BeanDeserializer) {
      deserializer = new ThrowableDeserializer((BeanDeserializer) deserializer);
    }

    // [JACKSON-440]: may have modifier(s) that wants to modify or replace serializer we just built:
    if (_factoryConfig.hasDeserializerModifiers()) {
      for (BeanDeserializerModifier mod : _factoryConfig.deserializerModifiers()) {
        deserializer = mod.modifyDeserializer(config, beanDesc, deserializer);
      }
    }
    return (JsonDeserializer<Object>) deserializer;
  }