#!/usr/bin/env python 
#------------------------------------------------------------------------------
# 
#   XML utilities 
#
# Project: XML Metadata Handling 
# Authors: Martin Paces <martin.paces@eox.at>
#
#-------------------------------------------------------------------------------
# Copyright (C) 2013 EOX IT Services GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
# copies of the Software, and to permit persons to whom the Software is 
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies of this Software or works derived from this Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#-------------------------------------------------------------------------------

# generate namespace aware name 

def nn( ns = None , name = None ) : 
    """ generate name-space ware entity name """ 

    # namespace + name given
    if ( ns is not None ) and ( name is not None ) : 
        return "{%s}%s"%(ns,name) 

    # single parameter input -> assuming a name without namespace 
    if ( ns is not None ) and ( name is None ) : 
        name = ns ; 
        ns   = name ; 

    # name without name-space 
    if ( ns is None ) and ( name is not None ) : 
        return "%s"%(name) 

    #invalid input  
    raise ValueError("Missing the requred input name!") 

