DefaultPartitionManager->getStoreForCredentialOperation handle null identityStore

if (cls.isAssignableFrom(credentialClass)) {
IdentityStore<?> identityStore = null;
try

{ store = getIdentityStoreAndInitializeContext(context, identityConfiguration, storeConfig); }

catch (ClassCastException cce)

{ throw MESSAGES.storeUnexpectedType(identityStore.getClass(), CredentialStore.class); }

// if we found a specific handler for the credential, immediately return.
if (cls.equals(credentialClass))

{ return store; }

}