public static AutowireCandidateResolver createAutowireCandidateResolver() 
{
		if (JdkVersion.isAtLeastJava15()) {
			try {
				Class resolverClass = ClassUtils.forName(
						QUALIFIED_ANNOTATION_AUTOWIRE_CANDIDATE_RESOLVER_CLASS_NAME, AutowireUtils.class.getClassLoader());
				return (AutowireCandidateResolver) resolverClass.newInstance();
			}
			catch (Throwable ex) {
				throw new IllegalStateException("Unable to load Java 1.5 dependent class [" +
						QUALIFIED_ANNOTATION_AUTOWIRE_CANDIDATE_RESOLVER_CLASS_NAME + "]", ex);
			}
		}
		else {
			return new SimpleAutowireCandidateResolver();
		}
}

If at least Java 1.5, this will return an annotation-aware resolver. Otherwise it returns a resolver that checks the bean definition only.

 public static boolean isExcludedFromDependencyCheck(PropertyDescriptor pd) 
{
		Method wm = pd.getWriteMethod();
		if (wm == null) {
			return false;
		}
		if (wm.getDeclaringClass().getName().indexOf("$$") == -1) {
			// Not a CGLIB method so it's OK.
			return false;
		}
		// It was declared by CGLIB, but we might still want to autowire it
		// if it was actually declared by the superclass.
		Class superclass = wm.getDeclaringClass().getSuperclass();
		return !ClassUtils.hasMethod(superclass, wm.getName(), wm.getParameterTypes());
}

Determine whether the given bean property is excluded from dependency checks.

This implementation excludes properties defined by CGLIB.

 public static boolean isSetterDefinedInInterface(PropertyDescriptor pd,
    Set interfaces) 
{
		Method setter = pd.getWriteMethod();
		if (setter != null) {
			Class targetClass = setter.getDeclaringClass();
			for (Iterator it = interfaces.iterator(); it.hasNext();) {
				Class ifc = (Class) it.next();
				if (ifc.isAssignableFrom(targetClass) &&
						ClassUtils.hasMethod(ifc, setter.getName(), setter.getParameterTypes())) {
					return true;
				}
			}
		}
		return false;
}

Return whether the setter method of the given bean property is defined in any of the given interfaces.

 public static  void sortConstructors(Constructor[] constructors) 
{
	                                           	 
		Arrays.sort(constructors, new Comparator() {
			public int compare(Object o1, Object o2) {
				Constructor c1 = (Constructor) o1;
				Constructor c2 = (Constructor) o2;
				boolean p1 = Modifier.isPublic(c1.getModifiers());
				boolean p2 = Modifier.isPublic(c2.getModifiers());
				if (p1 != p2) {
					return (p1 ? -1 : 1);
				}
				int c1pl = c1.getParameterTypes().length;
				int c2pl = c2.getParameterTypes().length;
				return (new Integer(c1pl)).compareTo(new Integer(c2pl)) * -1;
			}
		});
}

Sort the given constructors, preferring public constructors and "greedy" ones with a maximum of arguments. The result will contain public constructors first, with decreasing number of arguments, then non-public constructors, again with decreasing number of arguments.