Add license_matches property for strucutred files

Adds license_matches property to get the LicenseMatch objects
out of LicenseDetection objects directly as a property.

Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>

Author: AyanSinhaMahapatra

src/packagedcode/debian_copyright.py

@@ -11,6 +11,7 @@
 import sys
 from os import environ
 from os import path
+from itertools import chain
 
 import attr
 
@@ -200,6 +201,15 @@ def from_file(cls, location, check_consistency=False):
 
         return dc
 
+    @property
+    def license_matches(self):
+        matches = (
+            ld.license_matches
+            for ld in self.license_detections
+            if ld.license_matches
+        )
+        return chain.from_iterable(matches)
+
     def get_declared_license(
         self, filter_licenses=False, skip_debian_packaging=False, *args, **kwargs
     ):

tests/packagedcode/test_debian_copyright.py

@@ -18,7 +18,6 @@
 import saneyaml
 
 from packagedcode import debian_copyright
-from itertools import chain
 
 
 def check_expected_parse_copyright_file(
@@ -59,18 +58,8 @@ def check_expected_parse_copyright_file(
     )
 
     parsed = declared_license, license_expression, copyright
-    
-    if isinstance(dc, debian_copyright.UnstructuredCopyrightProcessor):
-        matches = dc.license_matches
-
-    elif isinstance(dc, debian_copyright.StructuredCopyrightProcessor):
-        matches = (
-            ld.license_matches
-            for ld in dc.license_detections
-            if ld.license_matches
-        )
-        matches = chain.from_iterable(matches)
 
+    matches = dc.license_matches
     matches = [lm for lm in matches if 'unknown-license-reference' == lm.rule.license_expression]
     match_details = list(map(get_match_details, matches))