import java.io.*;  // for InputStream, ByteArrayInputStream, and IOException
import java.net.*; // for DatagramPacket

public class ItemQuoteDecoderText implements ItemQuoteDecoder, ItemQuoteTextConst {

  private String encoding;  // Character encoding

  public ItemQuoteDecoderText() {
    encoding = DEFAULT_ENCODING;
  }

  public ItemQuoteDecoderText(String encoding) {
    this.encoding = encoding;
  }

  public ItemQuote decode(InputStream wire) throws IOException {
    String itemNo, description, quant, price, flags;
    byte[] space = " ".getBytes(encoding);
    byte[] newline = "\n".getBytes(encoding);
    itemNo = new String(Framer.nextToken(wire, space), encoding);
    description = new String(Framer.nextToken(wire, newline), encoding);
    quant = new String(Framer.nextToken(wire, space), encoding);
    price = new String(Framer.nextToken(wire, space), encoding);
    flags = new String(Framer.nextToken(wire, newline), encoding);
    return new ItemQuote(Long.parseLong(itemNo), description,
                         Integer.parseInt(quant),
                         Integer.parseInt(price),
                         (flags.indexOf('d') != -1),
                         (flags.indexOf('s') != -1));
  }

  public ItemQuote decode(DatagramPacket p) throws IOException {
    ByteArrayInputStream payload =
      new ByteArrayInputStream(p.getData(), p.getOffset(), p.getLength());
    return decode(payload);
  }
}