[bs-73] Anonymous classes cannot be used in @Bean definitions in .groovy scripts

* Added a test for each of the classes loaded by the SpringApplication
* If it's an anonymous class or looks like a Groovy closure we ignore it
* The CLI sample job.groovy also modified to take advantage

[Fixes #48718891]

spring-bootstrap/src/main/java/org/springframework/bootstrap/BeanDefinitionLoader.java

@@ -116,8 +116,12 @@ class BeanDefinitionLoader {
 	private int load(Object source) {
 		Assert.notNull(source, "Source must not be null");
 		if (source instanceof Class<?>) {
-			this.annotatedReader.register((Class<?>) source);
-			return 1;
+			Class<?> type = (Class<?>) source;
+			if (isComponent(type)) {
+				this.annotatedReader.register(type);
+				return 1;
+			}
+			return 0;
 		}
 
 		if (source instanceof Resource) {
@@ -149,6 +153,15 @@ class BeanDefinitionLoader {
 		throw new IllegalArgumentException("Invalid source '" + source + "'");
 	}
 
+	private boolean isComponent(Class<?> type) {
+		// Nested anonymous classes are not eligible for registration, nor are groovy
+		// closures
+		if (type.isAnonymousClass() || type.getName().contains("$_closure")) {
+			return false;
+		}
+		return true;
+	}
+
 	/**
 	 * Simple {@link TypeFilter} used to ensure that specified {@link Class} sources are
 	 * not accidentally re-added during scanning.

spring-bootstrap/src/main/java/org/springframework/bootstrap/SpringApplication.java

@@ -297,11 +297,11 @@ public class SpringApplication {
 			}
 		}
 
-		if (context instanceof AbstractApplicationContext) {
+		if (context instanceof AbstractApplicationContext && this.environment != null) {
 			((AbstractApplicationContext) context).setEnvironment(this.environment);
 		}
 
-		if (context instanceof GenericApplicationContext) {
+		if (context instanceof GenericApplicationContext && this.resourceLoader != null) {
 			((GenericApplicationContext) context).setResourceLoader(this.resourceLoader);
 		}
 	}