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.lang.reflect.Constructor;
  
  import org.w3c.dom.Element;
  
  import com.lts.LTSException;
  import com.lts.io.IndentingPrintWriter;
  import com.lts.xmlser.AbstractTag;
  import com.lts.xmlser.XmlSerializer;
  
  /**
   * A tag for an arbitrary class that can be serialized via the toString method 
   * and reconstituted via a string constructor.
   * 
   */
  public class StringSerializedTag extends AbstractTag
  {
  	public static final String STR_TAG_NAME = "stringSerialized";
  	
  	public void write(
  		XmlSerializer xser,
  		IndentingPrintWriter out,
  		String name,
  		Object value,
  		boolean printClassName
  	)
  		throws LTSException
  	{
  		int id = xser.addObject(value);
  		String[] attrs = null;
  		
  		
  		if (!printClassName && name.equals(value.getClass().getName()))
  		{
  			attrs = new String[] { STR_ATTR_ID, Integer.toString(id) };
  		}
  		else 
  		{
  			attrs = new String[] {
  			   STR_ATTR_ID, Integer.toString(id),
  			   STR_ATTR_CLASS, value.getClass().getName(),
  			};
  		}
  		
  		printElement(out, name, attrs, false, false);
  		
  		String s = escapeCharacters(value.toString());
  		out.print(s);
  		
  		printClosingElement(out, name);
  		
  	}
  
  	
  	public static Object createInstance (Class c, String value)
  		throws LTSException
  	{
  		try
  		{
  			Class[] formalParams = { String.class };
  			Constructor cons = c.getConstructor(formalParams);
  			
  			Object[] actualParams = { value };
  			Object o = cons.newInstance(actualParams);
  			return o;
  		}
  		catch (RuntimeException e)
  		{
  			throw e;
  		}
  		catch (Exception e)
  		{
  			throw new LTSException (
  				"Error trying to create instance of " + c
  				+ ", using a string constructor with value " + value,
  				e
  			);
  		}
  	}
  	
  	
  	public static Object createInstance (String className, String value)
  		throws LTSException
  	{
  		try
  		{
  			Class c = Class.forName(className);
  			return createInstance(c, value);
  		}
  		catch (ClassNotFoundException e)
  		{
  			throw new LTSException (e);
  		}
  	}
  	
  	
  	public Object read(XmlSerializer xser, Element node, boolean forgiving) 
  		throws LTSException
  	{
  		String className = node.getAttribute(STR_ATTR_CLASS);
  		if (null == className || "".equals(className))
  			className = node.getNodeName();
  		
  		String strValue = stringChildValue(node);
  		
  		return createInstance(className, strValue);
  	}
  	
  	
  
  	public String getTagName(Object o)
  	{
  		return o.getClass().getName();
  	}
  
  }
  