SecurityMetadataSource implementations for securing Java method invocations via different
 AOP libraries.
  | MethodSecurityMetadataSource | Interface for SecurityMetadataSource implementations
 that are designed to perform lookups keyed on Methods.  | 
          
| AbstractFallbackMethodSecurityMetadataSource | Abstract implementation of MethodSecurityMetadataSource that supports both Spring AOP and AspectJ and
 performs attribute resolution from: 1.  | 
          
| AbstractMethodSecurityMetadataSource | Abstract implementation of MethodSecurityMetadataSource which resolves the secured object type to a MethodInvocation. | 
| DelegatingMethodSecurityMetadataSource | Automatically tries a series of method definition sources, relying on the first source of metadata that provides a non-null/non-empty response. | 
| MapBasedMethodSecurityMetadataSource | Stores a list of ConfigAttributes for a method or class signature. |