Add permissive parsing for TypeDefinition

Before it was not possible to skip parsing of invalid
TypeDefinition node.

Author: mamiksik

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Support for TypeDefinition in OData v4 - Martin Miksik
 - Support for TypeDefinition in OData v4 - Martin Miksik
 - Add V4 to pyodata cmd interface - Martin Miksik
+- Permissive parsing for TypeDefinition
 
 ### Changed
 - Implementation and naming schema of `from_etree` - Martin Miksik

pyodata/policies.py

@@ -17,6 +17,7 @@ class ParserError(Enum):
     ANNOTATION = auto()
     ASSOCIATION = auto()
 
+    TYPE_DEFINITION = auto()
     ENUM_TYPE = auto()
     ENTITY_TYPE = auto()
     ENTITY_SET = auto()

pyodata/v4/build_functions.py

@@ -149,13 +149,17 @@ def build_unit_annotation(config: Config, target: Typ, annotation_node):
 
 
 def build_type_definition(config: Config, node):
-    typ = copy.deepcopy(Types.from_name(node.get('UnderlyingType'), config))
-    typ.name = node.get('Name')
-
-    annotation_nodes = node.xpath('edm:Annotation', namespaces=config.namespaces)
-    if annotation_nodes:
-        annotation_node = annotation_nodes[0]
-        build_annotation(annotation_node.get('Term'), config, target=typ, annotation_node=annotation_node)
+    try:
+        typ = copy.deepcopy(Types.from_name(node.get('UnderlyingType'), config))
+        typ.name = node.get('Name')
+
+        annotation_nodes = node.xpath('edm:Annotation', namespaces=config.namespaces)
+        if annotation_nodes:
+            annotation_node = annotation_nodes[0]
+            build_annotation(annotation_node.get('Term'), config, target=typ, annotation_node=annotation_node)
+    except KeyError as ex:
+        config.err_policy(ParserError.TYPE_DEFINITION).resolve(ex)
+        typ = NullType(node.get('Name'))
 
     return typ