content: //  Copyright 2006, Clark N. Hobbie
  //
  //  This file is part of the util library.
  //
  //  The util library is free software; you can redistribute it and/or modify it
  //  under the terms of the Lesser GNU General Public License as published by
  //  the Free Software Foundation; either version 2.1 of the License, or (at
  //  your option) any later version.
  //
  //  The util library 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 Lesser GNU General Public
  //  License for more details.
  //
  //  You should have received a copy of the Lesser GNU General Public License
  //  along with the util library; if not, write to the Free Software Foundation,
  //  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  //
  package com.lts.xmlser.tags;
  
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  import org.w3c.dom.Element;
  
  import com.lts.LTSException;
  import com.lts.io.IndentingPrintWriter;
  import com.lts.xml.XMLUtils;
  import com.lts.xmlser.AbstractTag;
  import com.lts.xmlser.XmlSerializer;
  
  public class MapTag extends AbstractTag
  {
  	public static final String STR_TAG_NAME = "map";
  	
  	public void write(
  		XmlSerializer xser,
  		IndentingPrintWriter out,
  		String name,
  		Object value,
  		boolean printClassName
  	)
  		throws LTSException
  	{
  		int id = xser.addObject(value);
  		Map m = (Map) value;
  		
  		String[] attrs = {
  			STR_ATTR_ID, Integer.toString(id),
  			STR_ATTR_CLASS, value.getClass().getName()
  		};
  		
  		printElement(out, name, attrs, false, true);
  		
  		out.increaseIndent();
  		
  		for (Iterator i = m.keySet().iterator(); i.hasNext();)
  		{
  			Object key = i.next();
  			Object theValue = m.get(key);
  			writeMapping (xser, out, key, theValue);
  		}
  		
  		out.decreaseIndent();
  		
  		this.printClosingElement(out, name);
  	}
  
  	
  	public void writeMapping(
  		XmlSerializer xser, 
  		IndentingPrintWriter out,
  		Object key,
  		Object value
  	) 
  		throws LTSException
  	{
  		printElement(out, "mapping", null, false, true);
  		
  		out.increaseIndent();
  		xser.printValue(out, key, "key", true);		
  		xser.printValue(out, value, "value", true);
  		out.decreaseIndent();
  		
  		printClosingElement(out, "mapping", true);
  	}
  
  
  	public void processMapping (XmlSerializer xser, Element node, Map m)
  		throws LTSException
  	{
  		Element keyElement = XMLUtils.getChild("key", node);
  		Object key = xser.readValue(keyElement);
  		Element valueElement = XMLUtils.getChild("value", node);
  		Object value = xser.readValue(valueElement);
  		
  		m.put(key, value);
  	}
  	
  	
  	public Object read(XmlSerializer xser, Element node, boolean forgiving) 
  		throws LTSException
  	{
  		try
  		{
  			String s = getRequiredAttr(node, STR_ATTR_CLASS);
  			Class c = Class.forName(s);
  			Map m = (Map) c.newInstance();
  			
  			List children = XMLUtils.getChildElements(node);
  			for (Iterator i = children.iterator(); i.hasNext();)
  			{
  				Element el = (Element) i.next();
  				if (el.getNodeName().equalsIgnoreCase("mapping"))
  				{
  					processMapping(xser, el, m);
  				}
  			}
  			return m;
  		}
  		catch (RuntimeException e)
  		{
  			throw e;
  		}
  		catch (Exception e)
  		{
  			throw new LTSException(e);
  		}
  	}
  
  	public String getTagName(Object o)
  	{
  		return "map";
  	}
  
  }
  