Use schema_salad.avro.schema.Name according to docs (#1281)

Author: rupertnash

cwltool/builder.py

@@ -254,14 +254,14 @@ def bind_input(
             bound_input = False
             for t in schema["type"]:
                 avsc = None  # type: Optional[Schema]
-                if isinstance(t, str) and self.names.has_name(t, ""):
-                    avsc = self.names.get_name(t, "")
+                if isinstance(t, str) and self.names.has_name(t, None):
+                    avsc = self.names.get_name(t, None)
                 elif (
                     isinstance(t, MutableMapping)
                     and "name" in t
-                    and self.names.has_name(t["name"], "")
+                    and self.names.has_name(t["name"], None)
                 ):
-                    avsc = self.names.get_name(t["name"], "")
+                    avsc = self.names.get_name(t["name"], None)
                 if not avsc:
                     avsc = make_avsc_object(convert_to_dict(t), self.names)
                 if validate.validate(avsc, datum):

cwltool/command_line_tool.py

@@ -851,7 +851,7 @@ def __init__(self, msg, **kwargs):  # type: (str, **Any) -> None
                 if compute_checksum:
                     adjustFileObjs(ret, partial(compute_checksums, fs_access))
             expected_schema = cast(
-                Schema, self.names.get_name("outputs_record_schema", "")
+                Schema, self.names.get_name("outputs_record_schema", None)
             )
             validate.validate_ex(
                 expected_schema, ret, strict=False, logger=_logger_validation_warnings

cwltool/process.py

@@ -729,7 +729,7 @@ def _init_job(self, joborder, runtime_context):
             fill_in_defaults(self.tool["inputs"], job, fs_access)
 
             normalizeFilesDirs(job)
-            schema = self.names.get_name("input_record_schema", "")
+            schema = self.names.get_name("input_record_schema", None)
             if schema is None:
                 raise WorkflowException(
                     "Missing input record schema: " "{}".format(self.names)
@@ -964,7 +964,7 @@ def validate_hints(self, avsc_names, hints, strict):
             sl = SourceLine(hints, i, validate.ValidationException)
             with sl:
                 if (
-                    avsc_names.get_name(r["class"], "") is not None
+                    avsc_names.get_name(r["class"], None) is not None
                     and self.doc_loader is not None
                 ):
                     plain_hint = dict(
@@ -973,7 +973,7 @@ def validate_hints(self, avsc_names, hints, strict):
                         if key not in self.doc_loader.identifiers
                     )  # strip identifiers
                     validate.validate_ex(
-                        avsc_names.get_name(plain_hint["class"], ""),
+                        avsc_names.get_name(plain_hint["class"], None),
                         plain_hint,
                         strict=strict,
                     )