Added metadata read parsers (pending Representation, DSD and DataFlow)

src/pysdmx/io/xml/sdmx21/reader/__init__.py

@@ -1,4 +1,4 @@
-"""SDMX 2.1 reader package."""
+"""SDMX 2.1 XML reader package."""
 
 from typing import Any, Dict, Optional
 
@@ -15,9 +15,11 @@
     REG_INTERFACE,
     STRSPE,
     STRUCTURE,
+    STRUCTURES,
     XML_OPTIONS,
 )
 from pysdmx.io.xml.sdmx21.doc_validation import validate_doc
+from pysdmx.io.xml.sdmx21.reader.metadata_read import StructureParser
 from pysdmx.io.xml.sdmx21.reader.submission_reader import (
     handle_registry_interface,
 )
@@ -91,9 +93,10 @@ def __generate_sdmx_objects_from_xml(
         code = dict_info[ERROR][ERROR_MESSAGE][ERROR_CODE]
         text = dict_info[ERROR][ERROR_MESSAGE][ERROR_TEXT]
         raise ClientError(int(code), text)
-    # Leaving this commented for metadata read (#39)
-    # if STRUCTURE in dict_info:
-    #     return create_structures(dict_info[STRUCTURE][STRUCTURES])
+    if STRUCTURE in dict_info:
+        return StructureParser().format_structures(
+            dict_info[STRUCTURE][STRUCTURES]
+        )
     if REG_INTERFACE in dict_info:
         return handle_registry_interface(dict_info)
     raise ValueError("Cannot parse this sdmx data")

src/pysdmx/io/xml/sdmx21/reader/__utils.py

@@ -0,0 +1,141 @@
+"""Utility functions and constants for the parsers module."""
+
+from typing import Any, Dict, List
+
+# Common
+ID = "id"
+AGENCY_ID = "agencyID"
+XMLNS = "xmlns"
+VERSION = "version"
+
+# Structure Specific
+VALUE = "Value"
+
+# Header
+REF = "Ref"
+
+# Structures
+# Common
+NAME = "Name"
+DESC = "Description"
+STR_URL = "structureURL"
+STR_URL_LOW = "structure_url"
+SER_URL = "serviceURL"
+SER_URL_LOW = "service_url"
+IS_EXTERNAL_REF = "isExternalReference"
+IS_EXTERNAL_REF_LOW = "is_external_reference"
+IS_FINAL = "isFinal"
+IS_FINAL_LOW = "is_final"
+IS_PARTIAL = "isPartial"
+IS_PARTIAL_LOW = "is_partial"
+# General
+ANNOTATIONS = "Annotations"
+
+# Individual
+CL = "Codelist"
+CON = "Concept"
+
+# Dimension
+DIM = "Dimension"
+
+# Measure
+PRIM_MEASURE = "PrimaryMeasure"
+
+# Group Dimension
+GROUP = "Group"
+DIM_REF = "DimensionReference"
+
+# Constraints
+KEY_VALUE = "KeyValue"
+
+# Annotation
+ANNOTATION = "Annotation"
+ANNOTATION_TITLE = "AnnotationTitle"
+ANNOTATION_TYPE = "AnnotationType"
+ANNOTATION_TEXT = "AnnotationText"
+ANNOTATION_URL = "AnnotationURL"
+
+TITLE = "title"
+TEXT = "text"
+TYPE = "type"
+URL = "url"
+
+# Facets
+FACETS = "facets"
+TEXT_TYPE = "textType"
+TEXT_TYPE_LOW = "text_type"
+
+# Contact
+CONTACT = "Contact"
+DEPARTMENT = "Department"
+ROLE = "Role"
+URIS = "uris"
+EMAILS = "emails"
+TELEPHONES = "telephones"
+FAXES = "faxes"
+URI = "URI"
+EMAIL = "Email"
+X400 = "X400"
+TELEPHONE = "Telephone"
+FAX = "Fax"
+
+# Extras
+AGENCY = "Agency"
+PAR_ID = "maintainableParentID"
+PAR_VER = "maintainableParentVersion"
+
+# Errors
+missing_rep: Dict[str, List[Any]] = {"CON": [], "CS": [], "CL": []}
+dsd_id: str = ""
+
+# Structure types
+AGENCIES = "AgencyScheme"
+ORGS = "OrganisationSchemes"
+CLS = "Codelists"
+CONCEPTS = "ConceptSchemes"
+CS = "ConceptScheme"
+CODE = "Code"
+
+FacetType = {
+    "minLength": "min_length",
+    "maxLength": "max_length",
+    "minValue": "min_value",
+    "maxValue": "max_value",
+    "startValue": "start_value",
+    "endValue": "end_value",
+    "interval": "interval",
+    "timeInterval": "time_interval",
+    "decimals": "decimals",
+    "pattern": "pattern",
+    "startTime": "start_time",
+    "endTime": "end_time",
+    "isSequence": "is_sequence",
+}
+
+
+def unique_id(agencyID: str, id_: str, version: str) -> str:
+    """Create a unique ID for an object.
+
+    Args:
+        agencyID: The agency ID
+        id_: The ID of the object
+        version: The version of the object
+
+    Returns:
+        A string with the unique ID
+    """
+    return f"{agencyID}:{id_}({version})"
+
+
+def add_list(element: Any) -> List[Any]:
+    """Make sure an element is a list and convert it if it is not.
+
+    Args:
+        element: The element to be converted
+
+    Returns:
+        A list with the element
+    """
+    if not isinstance(element, list):
+        element = [element]
+    return element