RE: Underlying File ?

On 04/16/2002 at 10:58:31 AM, java400-l-admin@midrange.com wrote:
That's what I guessed too, but I should have really said the object will be
of class FileInputStream - but that still makes little difference in trying
to determine the underlying file name :(
--- end of excerpt ---


Simply use your own objects that are FileInputStreams to
support this behavior.

public class NameableFileInputStream extends FileInputStream {
   String   savedName = null;
   public NameableFileInputStream(String name) {
      super(name);
      savedName = name;
   }
   public String getName() {
      return savedName;
   }
   public static String getName(InputStream obj) {
      String name = null;
      if (obj instanceof NameableFileInputStream) {
         NameableFileInputStream nObj = (NameableFileInputStream)obj;
         return nObj.getName();
      }
      // Or null, or whatever you feel is appropriate
      return "unknown - " + obj.getClass().getName();
   }
}

...Later, where the code needs the name....
name = NameableFileInputStream.getName(inputStream);




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