Add support for handling of RegularExpression definitions for string …

…based properties

Signed-off-by: Kostadin Ivanov (BD/TBC-BG) <[email protected]>

src/vss_tools/exporters/samm/helpers/samm_concepts.py

@@ -53,6 +53,7 @@ class SammConcepts(Enum):
     DESCRIPTION = "description"
     ENTITY = "Entity"
     EVENTS = "events"
+    VALUE = "value"
     EXAMPLE_VALUE = "exampleValue"
     NAME = "name"
     OPERATIONS = "operations"
@@ -92,6 +93,7 @@ class SammCConcepts(Enum):
     MIN_VALUE = "minValue"
     QUANTIFIABLE = "Quantifiable"
     RANGE_CONSTRAINT = "RangeConstraint"
+    REG_EXP_CONSTRAINT = "RegularExpressionConstraint"
     SINGLE_ENTITY = "SingleEntity"
     STATE = "State"
     TIMESTAMP = "Timestamp"

src/vss_tools/exporters/samm/helpers/ttl_builder_helper.py

@@ -330,7 +330,14 @@ def add_node_leaf_constraint(graph: Graph, node_char_name: str, node_char_uri: U
     constraint_name = str_to_uc_first_camel_case(vss_node.ttl_name + "Constraint")
     constraint_node_uri = get_vspec_uri(constraint_name)
 
-    __add_node_tuple(graph, constraint_node_uri, RDF.type, SammCConcepts.RANGE_CONSTRAINT.uri)
+    # Default Constraint URI is for Range (min/max) constraints
+    constraint_uri = SammCConcepts.RANGE_CONSTRAINT.uri
+
+    if hasattr(vss_node.data, "pattern") and vss_node.data.pattern is not None:
+        # Pattern property is used for Regular Expression constraints of STRING based data nodes
+        constraint_uri = SammCConcepts.REG_EXP_CONSTRAINT.uri
+
+    __add_node_tuple(graph, constraint_node_uri, RDF.type, constraint_uri)
     __add_node_tuple(graph, constraint_node_uri, SammConcepts.NAME.uri, Literal(constraint_name))
 
     # Workaround since doubles are serialized as scientific numbers
@@ -354,6 +361,16 @@ def add_node_leaf_constraint(graph: Graph, node_char_name: str, node_char_uri: U
             Literal(vss_node.data.min, datatype=data_type),  # type: ignore
         )
 
+    if vss_node.data.pattern is not None:  # type: ignore
+        __add_node_tuple(
+            graph,
+            constraint_node_uri,
+            SammConcepts.VALUE.uri,
+            Literal(vss_node.data.pattern, datatype=data_type),  # type: ignore
+        )
+
+        # Set the RegExp value for constraint_node_uri
+
     base_c_name = str_to_uc_first_camel_case(vss_node.ttl_name + "BaseCharacteristic")
     base_c_uri = get_vspec_uri(base_c_name)
 

src/vss_tools/exporters/samm/helpers/vss_helper.py

@@ -13,7 +13,7 @@
 from rdflib import URIRef
 from vss_tools import log
 from vss_tools.datatypes import Datatypes
-from vss_tools.model import NodeType, VSSDataBranch
+from vss_tools.model import NodeType, VSSDataBranch, VSSDataDatatype
 from vss_tools.tree import VSSNode
 
 from ..config import config as cfg
@@ -260,15 +260,8 @@ def get_node_description(vss_node: VSSNode) -> str:
 
 
 def has_constraints(vss_node: VSSNode) -> bool:
-    return (
-        hasattr(vss_node.data, "type")
-        and vss_node.data.type in [NodeType.ACTUATOR, NodeType.SENSOR]
-        and (
-            hasattr(vss_node.data, "max")
-            and vss_node.data.max is not None
-            or hasattr(vss_node.data, "min")
-            and vss_node.data.min is not None
-        )
+    return bool(
+        isinstance(vss_node.data, VSSDataDatatype) and (vss_node.data.max or vss_node.data.min or vss_node.data.pattern)
     )
 
 

src/vss_tools/model.py

@@ -178,6 +178,10 @@ class VSSDataDatatype(VSSData):
     arraysize: int | None = None
     min: int | float | None = None
     max: int | float | None = None
+    # Field, used to allow definition of Regular Expression constraints
+    # for string based property nodes.
+    # Example: VSS - VehicleIdentification.VIN property
+    pattern: str | None = None
     unit: str | None = None
     allowed: list[str | int | float | bool] | None = None
     default: list[str | int | float | bool] | str | int | float | bool | None = None
@@ -277,6 +281,31 @@ def check_datatype_matching_allowed_unit_datatypes(self) -> Self:
             ), f"'{self.datatype}' is not allowed for unit '{self.unit}'"
         return self
 
+    @model_validator(mode="after")
+    def check_datatype_pattern(self) -> Self:
+        """
+        Checks that regular expression datatype 'pattern' field is:
+
+        1. string only
+        2. defined only for string typed nodes i.e., STRING and STRING_ARRAY
+        3. if default value is provided it is matching the specified pattern
+        """
+        if self.pattern:
+            assert bool(type(self.pattern) is str), f"Specified pattern: '{self.pattern}' must be a string"
+
+            # Datatypes.TUPLE[0] is the string name of the type.
+            allowed_for = f"It is allowed only for '{Datatypes.STRING[0]}' and '{Datatypes.STRING_ARRAY[0]}' types."
+            assert bool(
+                Datatypes.get_type(self.datatype) in [Datatypes.STRING, Datatypes.STRING_ARRAY]
+            ), f"Field 'pattern' is not allowed for '{self.fqn}' of type: '{self.datatype}'. {allowed_for}"
+
+            if self.default:
+                assert bool(
+                    re.match(self.pattern, self.default)  # type: ignore
+                ), f"Specified default value: '{self.default}' must match defined pattern: '{self.pattern}'"
+
+        return self
+
 
 class VSSDataProperty(VSSDataDatatype):
     pass