code: /******************************************************************************
   *
   *	Copyright (c) 2017-2022, INTO-CPS Association,
   *	c/o Professor Peter Gorm Larsen, Department of Engineering
   *	Finlandsgade 22, 8200 Aarhus N.
   *
   *	This file is part of the INTO-CPS toolchain.
   *
   *	xsd2vdm is free software: you can redistribute it and/or modify
   *	it under the terms of the GNU General Public License as published by
   *	the Free Software Foundation, either version 3 of the License, or
   *	(at your option) any later version.
   *
   *	xsd2vdm is distributed in the hope that it will be useful,
   *	but WITHOUT ANY WARRANTY; without even the implied warranty of
   *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *	GNU General Public License for more details.
   *
   *	You should have received a copy of the GNU General Public License
   *	along with xsd2vdm. If not, see <http://www.gnu.org/licenses/>.
   *	SPDX-License-Identifier: GPL-3.0-or-later
   *
   ******************************************************************************/
  package xsd2vdm;
  
  import java.util.HashMap;
  import java.util.Map;
  
  public class Namespaces
  {
  	private Map<String, String> namespaces = new HashMap<String, String>();	// URL -> prefix
  
  	public void addNamespace(String namespace, String prefix)
  	{
  		namespaces.put(namespace, prefix);
  	}
  	
  	public String addNamespaces(Map<String, String> attributes)
  	{
  		String targetNamespace = null;
  		
  		for (String attr: attributes.keySet())
  		{
  			switch (attr)
  			{
  				case "targetNamespace":
  					targetNamespace = attributes.get(attr);
  					break;
  					
  				default:
  					if (attr.startsWith("xmlns:"))
  					{
  						String prefix = attr.substring(6);	// eg. "xs"
  						String namespace = attributes.get(attr);
  						addNamespace(namespace, prefix);
  					}
  					break;	// else ignore
  			}
  		}
  		
  		return getPrefix(targetNamespace);
  	}
  
  	public String getPrefix(String namespace)
  	{
  		String prefix = namespaces.get(namespace);
  		return prefix == null ? "" : prefix;
  	}
  
  	public boolean contains(String namespace)
  	{
  		return namespaces.containsKey(namespace);
  	}
  
  	public void clear()
  	{
  		namespaces.clear();
  	}
  }
  