Entity scan on non-existing data model package silences error (#3197)

* Added a step to model checking.Check if the annotated class collection obtained is empty.

* Added a test to model checking.

Solved some problems.

* Change the screwdriver to GitHub Actions. (#10)

The issue has been solved.

* Fixed the import statement.

* Test

* Test

* Replace ci-cd.yml with screwdriver.yaml.

elide-core/src/main/java/com/yahoo/elide/core/utils/DefaultClassScanner.java

@@ -47,11 +47,17 @@ public Set<Class<?>> getAnnotatedClasses(Package toScan, Class<? extends Annotat
 
     @Override
     public Set<Class<?>> getAnnotatedClasses(String packageName, Class<? extends Annotation> annotation) {
-        return startupCache.get(annotation.getCanonicalName()).stream()
-                .filter(clazz ->
-                        clazz.getPackage().getName().equals(packageName)
-                                || clazz.getPackage().getName().startsWith(packageName + "."))
+        LinkedHashSet<Class<?>> annotatedClasses = startupCache.get(annotation.getCanonicalName()).stream()
+                .filter(clazz -> clazz.getPackage().getName().equals(packageName)
+                        || clazz.getPackage().getName().startsWith(packageName + "."))
                 .collect(Collectors.toCollection(LinkedHashSet::new));
+
+        // Check if the annotated class collection obtained is empty
+        if (annotatedClasses.isEmpty()) {
+            throw new IllegalArgumentException("No annotated classes found in the specified package: " + packageName);
+        }
+
+        return annotatedClasses;
     }
 
     @Override

elide-core/src/test/java/com/yahoo/elide/core/utils/ClassScannerTest.java

@@ -6,6 +6,7 @@
 package com.yahoo.elide.core.utils;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import com.yahoo.elide.annotation.Include;
@@ -53,4 +54,11 @@ public void testGetAnyAnnotatedClasses() {
                     || cls.isAnnotationPresent(Entity.class));
         }
     }
+
+    @Test
+    public void testGetAnnotatedClassesNoClassesFound() {
+        assertThrows(IllegalArgumentException.class, () -> {
+            scanner.getAnnotatedClasses("nonexistent.package", Include.class);
+        }, "No annotated classes found in the specified package: nonexistent.package");
+    }
 }