com.fasterxml.jackson.annotation.JsonProperty#value ( )源码实例Demo

/**
 * Gets json names from module fields annotations.
 *
 * @param type The Java module type.
 * @return List of json property names.
 */
private static List<ModuleProperty> getFieldAnnotations(Class type) {
    List<ModuleProperty> modelProperties = new ArrayList<ModuleProperty>();
    Field[] fields = type.getDeclaredFields();
     for(Field field : fields) {
        Annotation[] annotations = field.getDeclaredAnnotations();

        for(Annotation annotation : annotations){
            if(annotation instanceof JsonProperty){
                JsonProperty property = (JsonProperty) annotation;
                ModuleProperty moduleProperty = new ModuleProperty();
                moduleProperty.name = field.getName();
                moduleProperty.jsonName = property.value();
                moduleProperty.type = field.getType();
                moduleProperty.isNumeric = isTypeNumeric(field.getType());
                modelProperties.add(moduleProperty);
            }
        }
    }

    return modelProperties;
}
 

private static String propertyName(Method getterMethod) {
    JsonProperty jsonProperty = getterMethod.getAnnotation(JsonProperty.class);
    if (jsonProperty != null
            && !jsonProperty.value().isEmpty()) {
        return jsonProperty.value();
    } else {
        String name = getterMethod.getName();
        if (name.startsWith("get")
                && name.length() > 3) {
            return name.substring(3, 4).toLowerCase(Locale.ENGLISH) + name.substring(4);
        } else if (name.startsWith("is")
                && name.length() > 2
                && getterMethod.getReturnType().equals(boolean.class)) {
            return name.substring(2, 3).toLowerCase(Locale.ENGLISH) + name.substring(3);
        } else {
            return null;
        }
    }
}
 

private void addJacksonAnnotationsToConstructorParameter(Field field, AnnotatedParameter parameter, String name) {
    if (field != null) {
        for (Annotation a : field.getAnnotations()) {
            if (a.annotationType().getName().startsWith("com.fasterxml")) {
                if (a.annotationType() != JsonProperty.class) {
                    parameter.addOrOverride(a);
                } else {
                    JsonProperty jp = (JsonProperty) a;
                    if (!jp.value().equals("")) {
                        name = jp.value();
                    }
                }
            }
        }
    }

    JsonProperty jsonProperty =
            ProxyAnnotation.of(JsonProperty.class, Collections.singletonMap("value", name));
    parameter.addOrOverride(jsonProperty);
}
 

/**
 * Look-up an alternative name as per the following order of priority.
 * <ol>
 * <li>{@link JsonProperty} annotation on the field itself</li>
 * <li>{@link JsonProperty} annotation on the field's getter method</li>
 * </ol>
 *
 * @param field field to look-up alternative property name for
 * @return alternative property name (or {@code null})
 */
protected String getPropertyNameOverrideBasedOnJsonPropertyAnnotation(FieldScope field) {
    JsonProperty annotation = field.getAnnotationConsideringFieldAndGetter(JsonProperty.class);
    if (annotation != null) {
        String nameOverride = annotation.value();
        // check for invalid overrides
        if (nameOverride != null && !nameOverride.isEmpty() && !nameOverride.equals(field.getDeclaredName())) {
            return nameOverride;
        }
    }
    return null;
}
 

@Override
public PropertyName findNameForDeserialization(Annotated annotatedEntity) {
    // This logic relies on the fact that Immutables generates setters annotated with @JsonProperty.
    // It thus becomes obsolete whenever we move away from Immutables and the deserialization target no longer
    // carries those annotations.

    JsonProperty propertyAnnotation = _findAnnotation(annotatedEntity, JsonProperty.class);
    if (propertyAnnotation != null) {
        String jsonFieldName = propertyAnnotation.value();
        Preconditions.checkArgument(
                KEBAB_CASE_PATTERN.matcher(jsonFieldName).matches(),
                "Conjure grammar requires kebab-case field names: %s",
                jsonFieldName);
    }

    if (annotatedEntity instanceof AnnotatedMethod) {
        AnnotatedMethod maybeSetter = (AnnotatedMethod) annotatedEntity;
        if (maybeSetter.getName().startsWith("set")) {
            // As a pre-caution, require that all setters have a JsonProperty annotation.
            Preconditions.checkArgument(
                    _findAnnotation(annotatedEntity, JsonProperty.class) != null,
                    "All setter ({@code set*}) deserialization targets require @JsonProperty annotations: %s",
                    maybeSetter.getName());
        }
    }

    return null; // delegate to the next introspector in an AnnotationIntrospectorPair.
}
 

/**
 * Given a field of a POJO class and JsonNode corresponds to the same POJO class,
 * check field's {@link JsonProperty} has flattening dots in it if so
 * flatten the nested child JsonNode corresponds to the field in the given JsonNode.
 *
 * @param classField the field in a POJO class
 * @param jsonNode the json node corresponds to POJO class that field belongs to
 */
@SuppressWarnings("unchecked")
private static void handleFlatteningForField(Field classField, JsonNode jsonNode) {
    final JsonProperty jsonProperty = classField.getAnnotation(JsonProperty.class);
    if (jsonProperty != null) {
        final String jsonPropValue = jsonProperty.value();
        if (containsFlatteningDots(jsonPropValue)) {
            JsonNode childJsonNode = findNestedNode(jsonNode, jsonPropValue);
            ((ObjectNode) jsonNode).put(jsonPropValue, childJsonNode);
        }
    }
}
 

public static String getPropertyName(AccessibleObject property) {
    JsonProperty jsonProperty = Annotations.get(property, JsonProperty.class);
    if (jsonProperty != null) {
        return jsonProperty.value();
    } else {
        if (property instanceof Field) {
            return ((Field) property).getName();
        } else if (property instanceof Method) {
            return ((Method) property).getName();
        }
        throw new ElepyConfigException("Failed to get the name from AccessibleObject");
    }
}
 

protected String getPropertyName(Element field) {
    JsonProperty annotation = field.getAnnotation(JsonProperty.class);
    if (isNull(annotation) || JsonProperty.USE_DEFAULT_NAME.equals(annotation.value())) {
        return field.getSimpleName().toString();
    } else {
        return annotation.value();
    }
}
 

/**
 * @param field
 * @return the field provided in the {@link JsonProperty} as long as the provided name is not JsonProperty.USE_DEFAULT_NAME otherwise return the field simple name
 */
private String getPropertyName(Element field) {
    JsonProperty annotation = field.getAnnotation(JsonProperty.class);
    if (isNull(annotation) || JsonProperty.USE_DEFAULT_NAME.equals(annotation.value())) {
        return field.getSimpleName().toString();
    } else {
        return annotation.value();
    }
}
 

public String getParameterName() {
    String parameterName = parameter.getSimpleName().toString();
    JsonProperty jsonProperty = parameter.getAnnotation(JsonProperty.class);
    if (nonNull(jsonProperty)) {
        String value = jsonProperty.value();
        parameterName = value.isEmpty() ? parameterName : value;
    }
    return parameterName;
}
 

@SuppressWarnings("deprecation")
@Override
public String findEnumValue(Enum<?> value) {
  try {
    JsonProperty annotation = value.getClass().getField(value.name()).getAnnotation(JsonProperty.class);
    if (null == annotation || StringUtils.isEmpty(annotation.value())) {
      return super.findEnumValue(value);
    }
    return annotation.value();
  } catch (NoSuchFieldException e) {
    return super.findEnumValue(value);
  }
}
 

/**
 * Given a field of a POJO class and JsonNode corresponds to the same POJO class,
 * check field's {@link JsonProperty} has flattening dots in it if so
 * flatten the nested child JsonNode corresponds to the field in the given JsonNode.
 *
 * @param classField the field in a POJO class
 * @param jsonNode the json node corresponds to POJO class that field belongs to
 */
@SuppressWarnings("unchecked")
private static void handleFlatteningForField(Field classField, JsonNode jsonNode) {
    final JsonProperty jsonProperty = classField.getAnnotation(JsonProperty.class);
    if (jsonProperty != null) {
        final String jsonPropValue = jsonProperty.value();
        if (containsFlatteningDots(jsonPropValue)) {
            JsonNode childJsonNode = findNestedNode(jsonNode, jsonPropValue);
            ((ObjectNode) jsonNode).put(jsonPropValue, childJsonNode);
        }
    }
}
 

@Override
public ObjectIdInfo findObjectIdInfo(Annotated annotated) {
    Class<?> rawClass = annotated.getType().getRawClass();
    for (Type<?> type : model.getTypes()) {
        if (type.getClassType() == rawClass && type.getSingleKeyAttribute() != null) {
            Attribute<?, ?> attribute = type.getSingleKeyAttribute();
            String name = removePrefix(attribute.getPropertyName());
            if (useTableNames) {
                name = attribute.getName();
            }

            // if the name is overridden use that
            Class<?> superClass = rawClass.getSuperclass();
            while (superClass != Object.class && superClass != null) {
                try {
                    Field field = superClass.getDeclaredField(attribute.getPropertyName());
                    JsonProperty jsonProperty = field.getAnnotation(JsonProperty.class);
                    if (jsonProperty != null) {
                        name = jsonProperty.value();
                        break;
                    }
                } catch (NoSuchFieldException ignored) {
                }
                superClass = superClass.getSuperclass();
            }

            return new ObjectIdInfo(new PropertyName(name), rawClass,
                    ObjectIdGenerators.PropertyGenerator.class,
                    EntityStoreResolver.class);
        }
    }
    return super.findObjectIdInfo(annotated);
}
 

private String fetchParameterName(Parameter parameter) {
    final JsonProperty jsonAnnotation = parameter.getAnnotation(JsonProperty.class);
    final ParameterName parameterNameAnnotation = parameter.getAnnotation(ParameterName.class);

    if (parameterNameAnnotation != null) {
        return parameterNameAnnotation.value();
    }

    if (jsonAnnotation != null) {
        return jsonAnnotation.value();
    }

    return parameter.getName();
}
 

private String renderName(PropertyDescriptor descriptor) {
    if (descriptor.getReadMethod().isAnnotationPresent(JsonProperty.class)) {
        JsonProperty annotation = descriptor.getReadMethod().getAnnotation(JsonProperty.class);

        if (!JsonProperty.USE_DEFAULT_NAME.equalsIgnoreCase(annotation.value())) {
            return annotation.value();
        }
    }

    return descriptor.getName();
}
 

private String getFieldName(AccessibleProperty property) {
  JsonProperty jsonProperty = getAnnotation(property, JsonProperty.class);
  if(jsonProperty != null && jsonProperty.value().length() > 0) {
    return jsonProperty.value();
  } else {
    return property.name;
  }
}
 

@Override
public String findImplicitPropertyName(AnnotatedMember member) {
    JsonProperty property = member.getAnnotation(JsonProperty.class);
    if (property == null) {
        if (member instanceof AnnotatedMethod) {
            AnnotatedMethod method = (AnnotatedMethod) member;
            String fieldName = BeanUtil.okNameForGetter(method);
            return getJacksonPropertyName(member.getDeclaringClass(), fieldName);
        }
    } else if (!property.value().equals("")) {
        return property.value();
    }

    return null;
}
 

private String getJacksonPropertyName(Class<?> declaringClass, String fieldName) {
    if (fieldName != null) {
        try {
            Field field = declaringClass.getDeclaredField(fieldName);
            if (field != null) {
                JsonProperty fieldProperty = field.getAnnotation(JsonProperty.class);
                if (fieldProperty != null && !fieldProperty.value().equals("")) {
                    return fieldProperty.value();
                }
            }
        } catch (NoSuchFieldException ignored) {
        }
    }
    return null;
}
 

@Override
public String getFieldName(PersistentProperty<?> property) {

    JsonProperty jsonPropertyAnnotation = property.findAnnotation(JsonProperty.class);

    if (jsonPropertyAnnotation != null) {
        return jsonPropertyAnnotation.value();
    }
    else {
        return backingStrategy.getFieldName(property);
    }
}
 

protected String _findExplicitName(AnnotatedElement m) {
    JsonProperty ann = _find(m, JsonProperty.class);
    return (ann == null) ? null : ann.value();
}