Re: Formatting a date

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On Mon 27 March 2006 19:12, Keats Kirsch wrote:
> Alex Twisleton-Wykeham-Fiennes wrote:
> >Why not make it so that the wrapper class extends Date so that you can
> > then also used the wrapped class as a drop-in replacement for Date in
> > other methods.
> >
> >Also, why not make the wrapper include a hashtable accessor that enables
> > you to extend the number of registered formats on it?
>
> Exactly what I was thinking.  Don't know when I'll find the time, but it
> should be a fun little project.

the attached should be roughly what you are looking for.  I'm not sure what 
the correct way of wrapping it up should be to drop it into a context though 
as I have my own framework of utilities and I don't use the conventional 
context tools that much.

Alex

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import java.util.*;
import java.text.*;

public class DateFactory 
{
  private final Map __simpleDateFormats = new HashMap();

  public void registerFormat(String name,
                             SimpleDateFormat sdf) 
  {
    synchronized (__simpleDateFormats) {
      __simpleDateFormats.put(name, sdf);
    }
  }

  public void registerFormat(String name,
                             String format) 
  {
    registerFormat(name, new SimpleDateFormat(format));
  }

  public SimpleDateFormat getFormat(String name) 
  {
    synchronized (__simpleDateFormats) {
      return (SimpleDateFormat) __simpleDateFormats.get(name);
    }
  }

  public DateWrapper parse(String date,
                           String formatName) 
    throws ParseException
  {
    SimpleDateFormat sdf = getFormat(formatName);
    return new DateWrapper(sdf.parse(date));
  }

  public DateWrapper wrap(Date date) 
  {
    return new DateWrapper(date);
  }

  public class DateWrapper
    extends Date 
  {
    private DateWrapper(Date date) 
    {
      super(date.getTime());
    }

    public Object get(Object key) 
    {
      return getFormat(key.toString()).format(this);
    }
  }
}
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