Add primitive_or_expr() back to conditions

Author: Ao Guo

src/sagemaker/workflow/conditions.py

@@ -20,13 +20,15 @@
 import abc
 
 from enum import Enum
-from typing import List, Union
+from typing import Dict, List, Union
 
 import attr
 
+from sagemaker.workflow import is_pipeline_variable
 from sagemaker.workflow.entities import (
     DefaultEnumMeta,
     Entity,
+    Expression,
     PrimitiveType,
     RequestType,
 )
@@ -289,3 +291,17 @@ def _referenced_steps(self) -> List[str]:
         for condition in self.conditions:
             steps.extend(condition._referenced_steps)
         return steps
+
+
+def primitive_or_expr(
+    value: Union[ExecutionVariable, Expression, PrimitiveType, Parameter, Properties]
+) -> Union[Dict[str, str], PrimitiveType]:
+    """Provide the expression of the value or return value if it is a primitive.
+    Args:
+        value (Union[ConditionValueType, PrimitiveType]): The value to evaluate.
+    Returns:
+        Either the expression of the value or the primitive value.
+    """
+    if is_pipeline_variable(value):
+        return value.expr
+    return value