Trait ProtoTypeResolver 

pub trait ProtoTypeResolver:
    Debug
    + Send
    + Sync {
    // Required methods
    fn get_field_type(&self, message: &str, field: &str) -> Option<CelType>;
    fn has_message(&self, message: &str) -> bool;
    fn is_extension(&self, message: &str, ext_name: &str) -> bool;
    fn get_enum_value(&self, enum_name: &str, value_name: &str) -> Option<i32>;
    fn resolve_qualified(
        &self,
        parts: &[&str],
        container: &str,
    ) -> Option<ResolvedProtoType>;
    fn resolve_message_name(
        &self,
        name: &str,
        container: &str,
    ) -> Option<String>;
    fn as_any(&self) -> &dyn Any;

    // Provided method
    fn message_field_names(&self, _message: &str) -> Option<Vec<String>> { ... }
}

Trait for protobuf descriptor pool access (checker operations).

This trait provides type information needed during type checking, without requiring the ability to construct or manipulate proto messages.

Object Safety

This trait is object-safe and can be used with dyn ProtoTypeResolver.

Downcasting

The as_any() method enables downcasting to concrete types. Note that downcasting only works with the exact concrete type - wrapped or newtype implementations will not match.

Required Methods

fn get_field_type(&self, message: &str, field: &str) -> Option<CelType>

Get the CEL type of a message field.

fn has_message(&self, message: &str) -> bool

Check whether a message type is known to this registry.

fn is_extension(&self, message: &str, ext_name: &str) -> bool

Check whether ext_name is a known extension field on message.

fn get_enum_value(&self, enum_name: &str, value_name: &str) -> Option<i32>

Get the numeric value of an enum constant by name.

fn resolve_qualified( &self, parts: &[&str], container: &str, ) -> Option<ResolvedProtoType>

Resolve a qualified name (dot-separated parts) within a container namespace.

Returns the resolved proto type (Message, Enum, or EnumValue).

fn resolve_message_name(&self, name: &str, container: &str) -> Option<String>

Resolve a message name within a container namespace using C++ namespace rules.

Returns the fully qualified message name if found.

fn as_any(&self) -> &dyn Any

Downcast to a concrete type via Any.

Provided Methods

fn message_field_names(&self, _message: &str) -> Option<Vec<String>>

List all field names of a message type.

Returns None if the message type is unknown to this registry. Default implementation returns None.

Implementors