fix: ApigeeLLM support for Built-in tools like GoogleSearch, BuiltInCodeExecutor when calling Gemini models through Apigee

PiperOrigin-RevId: 840459113

src/google/adk/utils/model_name_utils.py

@@ -34,12 +34,17 @@ def extract_model_name(model_string: str) -> str:
     The extracted model name (e.g., "gemini-2.5-pro")
   """
   # Pattern for path-based model names
-  path_pattern = (
-      r'^projects/[^/]+/locations/[^/]+/publishers/[^/]+/models/(.+)$'
+  # Need to support both Vertex/Gemini and Apigee model paths.
+  path_patterns = (
+      r'^projects/[^/]+/locations/[^/]+/publishers/[^/]+/models/(.+)$',
+      r'^apigee/(?:[^/]+/)?(?:[^/]+/)?(.+)$',
   )
-  match = re.match(path_pattern, model_string)
-  if match:
-    return match.group(1)
+  # Check against all path-based patterns
+  for pattern in path_patterns:
+    match = re.match(pattern, model_string)
+    if match:
+      # Return the captured group (the model name)
+      return match.group(1)
 
   # Handle 'models/' prefixed names like "models/gemini-2.5-pro"
   if model_string.startswith('models/'):

tests/unittests/utils/test_model_name_utils.py

@@ -42,6 +42,24 @@ class TestExtractModelName:
     path_model_3 = 'projects/test-project/locations/europe-west1/publishers/google/models/claude-3-sonnet'
     assert extract_model_name(path_model_3) == 'claude-3-sonnet'
 
+    path_model_4 = 'apigee/gemini-2.5-flash'
+    assert extract_model_name(path_model_4) == 'gemini-2.5-flash'
+
+    path_model_5 = 'apigee/v1/gemini-2.5-flash'
+    assert extract_model_name(path_model_5) == 'gemini-2.5-flash'
+
+    path_model_6 = 'apigee/gemini/gemini-2.5-flash'
+    assert extract_model_name(path_model_6) == 'gemini-2.5-flash'
+
+    path_model_7 = 'apigee/vertex_ai/gemini-2.5-flash'
+    assert extract_model_name(path_model_7) == 'gemini-2.5-flash'
+
+    path_model_8 = 'apigee/gemini/v1/gemini-2.5-flash'
+    assert extract_model_name(path_model_8) == 'gemini-2.5-flash'
+
+    path_model_9 = 'apigee/vertex_ai/v1beta/gemini-2.5-flash'
+    assert extract_model_name(path_model_9) == 'gemini-2.5-flash'
+
   def test_extract_model_name_with_models_prefix(self):
     """Test extraction of model names with 'models/' prefix."""
     assert extract_model_name('models/gemini-2.5-pro') == 'gemini-2.5-pro'