[jira] [Created] (LANG-1159) SerializationUtils.clone cannot be used with java.util.List and "type safety"

["Stefan Cordes (JIRA)" <ji...@apache.org>]

Stefan Cordes created LANG-1159:
-----------------------------------

             Summary: SerializationUtils.clone cannot be used with java.util.List and "type safety"
                 Key: LANG-1159
                 URL: https://issues.apache.org/jira/browse/LANG-1159
             Project: Commons Lang
          Issue Type: Improvement
    Affects Versions: 3.3.2
            Reporter: Stefan Cordes
            Priority: Minor


Having a 
java.util.List<Integer> someElements;
and wanting to clone with
deepClone = SerializationUtils.clone(someElements);
gives error
"is not a valid substitute for the bounded parameter <T extends Serializable>	"

Casting to Serializable:
deepClone = SerializationUtils.clone((Serializable)someElements);
gives error
"Type mismatch: cannot convert from Serializable to List<Integer>"

and finally 
deepClone = (java.util.List<Integer>) SerializationUtils.clone((Serializable)someElements);
gives warning
"Type safety: Unchecked cast from Serializable to List<Integer>"

Please add a Method to clone Collections in SerializationUtils:

@SuppressWarnings("unchecked")
public static <T extends Collection<S>, S extends Serializable> T cloneCollection(T aCollection) {
	// Assuming Serializable implementation of Collection is used (e.g. ArrayList)
	return (T) clone((Serializable) aCollection);
}








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