feat(BA-2847): Add base class for minilang filter and ordering converter implementations

changes/6492.feature.md

@@ -0,0 +1 @@
+Introduce `BaseMinilangFilterConverter` and `BaseMinilangOrderParser` abstract base classes for converting minilang filter expressions and order strings to domain-specific Filter and OrderingOption objects

src/ai/backend/common/exception.py

@@ -790,3 +790,55 @@ def error_code(cls) -> ErrorCode:
             operation=ErrorOperation.READ,
             error_detail=ErrorDetail.NOT_FOUND,
         )
+
+
+class InvalidParameter(BackendAIError, web.HTTPBadRequest):
+    error_type = "https://api.backend.ai/probs/invalid-parameter"
+    error_title = "Invalid Parameter"
+
+    @classmethod
+    def error_code(cls) -> ErrorCode:
+        return ErrorCode(
+            domain=ErrorDomain.BACKENDAI,
+            operation=ErrorOperation.REQUEST,
+            error_detail=ErrorDetail.BAD_REQUEST,
+        )
+
+
+class ASTParsingFailed(BackendAIError, web.HTTPBadRequest):
+    error_type = "https://api.backend.ai/probs/ast-parsing-failed"
+    error_title = "AST Parsing Failed"
+
+    @classmethod
+    def error_code(cls) -> ErrorCode:
+        return ErrorCode(
+            domain=ErrorDomain.BACKENDAI,
+            operation=ErrorOperation.PARSING,
+            error_detail=ErrorDetail.BAD_REQUEST,
+        )
+
+
+class UnsupportedOperation(BackendAIError, web.HTTPBadRequest):
+    error_type = "https://api.backend.ai/probs/unsupported-operation"
+    error_title = "Unsupported Operation"
+
+    @classmethod
+    def error_code(cls) -> ErrorCode:
+        return ErrorCode(
+            domain=ErrorDomain.BACKENDAI,
+            operation=ErrorOperation.REQUEST,
+            error_detail=ErrorDetail.BAD_REQUEST,
+        )
+
+
+class UnsupportedFieldType(BackendAIError, web.HTTPBadRequest):
+    error_type = "https://api.backend.ai/probs/unsupported-field-type"
+    error_title = "Unsupported Field Type"
+
+    @classmethod
+    def error_code(cls) -> ErrorCode:
+        return ErrorCode(
+            domain=ErrorDomain.BACKENDAI,
+            operation=ErrorOperation.REQUEST,
+            error_detail=ErrorDetail.BAD_REQUEST,
+        )