Allowed Characters in a Cache Name

[cruftex]

CacheManager.createCache should have information about characters in the cache name.

The Spec says on page 113:

11.2.1. Cache Name
If no cache name is specified either on the method level annotation or at the class level with the
@CacheDefaults annotation then the name is generated as the following:
package.name.ClassName.methodName(package.ParameterType,package.ParameterType)

This means a cache implementation must allow at least the special characters for a cache name: .(),
This is in the annotations sections. Legal/illegal characters in the cache name are not mentioned anywhere else.

On Spec page 132:

Caches do not use forward slashes (/) or colons (:) as part of their names. Additionally it is
recommended that cache names starting with java. or javax.should not be used.

It in the section 'Portability Recommendations', so not mandatoriy.