Small correction in JndiServiceImpl

After upgrade to 4 Hibernate started crashing when using the JDBC poolmanager I am using. Turns out that it does not implement JNDI getNameParser(). Hibernate does not do a null check there. After a little tweak it was working again.

@Override
public Object locate(String jndiName) {
InitialContext initialContext = buildInitialContext();
Name name = null;
try {
name = parseName( jndiName, initialContext );
}
catch(JndiException je)
{
if(je.getMessage().indexOf("implemented") == -1)
throw je;
}

try {
if(name != null)
return initialContext.lookup(name);
else
return initialContext.lookup(jndiName);
}
catch ( NamingException e ) {
throw new JndiException( "Unable to lookup JNDI name [" + jndiName + "]", e );
}
finally {
cleanUp( initialContext );
}
}

private Name parseName(String jndiName, Context context) {
try {
NameParser np = context.getNameParser( "" );
if(np == null)
throw new JndiException("NameParser not implemented", null);
return np.parse( jndiName );
}
catch ( InvalidNameException e ) {
throw new JndiNameException( "JNDI name [" + jndiName + "] was not valid", e );
}
catch ( NamingException e ) {
throw new JndiException( "Error parsing JNDI name [" + jndiName + "]", e );
}
}

(I could have added an extra Exception, but I did not want to create an extra dependency for me to patch)