package wox.serial;

import java.lang.reflect.*;

/**
 * Version: 1.0
 * Author: Carlos R. Jaimez Gonzalez
 * Author: Simon M. Lucas
 * Site: http://woxserializer.sourceforge.net/
 *
 * Version: 1.5
 * Author: Steven M Lewis
 *
 * Version: 2.0
 * Author: George Smith
 * SVN: http://svn.xp-dev.com/svn/WOX2/
 * Note: XML form for vs 2 is more compact and therefor incompatible with vs 1
 */

public abstract class AbstractStringableHandler extends AbstractHandler implements WoxIsAHandler
{
    @Override
    public Object readObject( WoxHandlers pWoxHandlers, WoxReader pWoxReader, XMLreader pReader )
    {
        try
        {
            String zValue = pReader.getAttribute( Serial.VALUE );
            return createInstance( zValue );
        }
        catch ( Exception e )
        {
            throw new ApplicationException( getClass().getSimpleName() + " Exception is: " + e.getMessage(), e );
        }
    }

    @Override
    public void writeObject( WoxHandlers pWoxHandlers, WoxWriter pWoxWriter, Object pObject, Field pField, XMLwriter pWriter, boolean pJustType )
    {
        pWriter.writeStartElement( Serial.OBJECT );
        pWriter.writeAttributeString( Serial.TYPE, getWoxTypeFor( pWoxHandlers, pObject.getClass(), pField, pJustType ) );
        pWriter.writeAttributeString( Serial.VALUE, stringify( pObject ) );

        pWriter.writeEndElement();
    }

    @Override
    public Object parseFieldValue( String pFieldValue )
    {
        return createInstance( pFieldValue );
    }

    @Override
    public String createFieldValue( Object pFieldValue )
    {
        return stringify( pFieldValue );
    }

    abstract protected Object createInstance( String pValue );

    protected String stringify( Object pObject )
    {
        return (pObject == null) ? Serial.NULL : pObject.toString();
    }
}