Examples of java.io.PushbackInputStream.unread()

java.io.PushbackInputStream.unread()
Pushes back a byte by copying it to the front of the pushback buffer. After this method returns, the next byte to be read will have the value (byte)b. @param b the int value whose low-order byte is to be pushed back. @exception IOException If there is not enough room in the pushbackbuffer for the byte, or this input stream has been closed by invoking its {@link #close()} method.

        try {
            PushbackInputStream pin = 
                new PushbackInputStream(connection.getInputStream());
            int c = pin.read();
            if (c != -1) {
                pin.unread((byte)c);
                in = pin;
            }
        } catch (IOException ioe) {
            // ignore
        }

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        LongField signature = new LongField(HeaderBlockConstants._signature_offset, header);


        // Wind back those 8 bytes
        if(inp instanceof PushbackInputStream) {
            PushbackInputStream pin = (PushbackInputStream)inp;
            pin.unread(header);
        } else {
            inp.reset();
        }
        
        // Did it match the signature?

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    throw new IllegalArgumentException("The document is really a RTF file");
  }


  // OK, so it's not RTF
  // Open a POIFSFileSystem on the (pushed back) stream
  pis.unread(first6);
  return new POIFSFileSystem(pis);
  }


  /**
   * This constructor loads a Word document from an InputStream.

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                } else {
                    unread = n;
                }


                if (unread > 0) {
                    pushbackInputStream.unread(bom, (n - unread), unread);
                } else if (unread < -1) {
                    pushbackInputStream.unread(bom, 0, 0);
                }


                inputStream = pushbackInputStream;

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                }


                if (unread > 0) {
                    pushbackInputStream.unread(bom, (n - unread), unread);
                } else if (unread < -1) {
                    pushbackInputStream.unread(bom, 0, 0);
                }


                inputStream = pushbackInputStream;
            }

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        LongField signature = new LongField(HeaderBlockConstants._signature_offset, header);


        // Wind back those 8 bytes
        if(inp instanceof PushbackInputStream) {
            PushbackInputStream pin = (PushbackInputStream)inp;
            pin.unread(header);
        } else {
            inp.reset();
        }


        // Did it match the signature?

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                        break;
                    case 92:
                        decoded.write(Stomp.ESCAPE);
                        break;
                    default:
                        stream.unread(next);
                        decoded.write(value);
                    }
                } else {
                    decoded.write(value);
                }

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            /*
             * We read something without a problem, so it's a valid zlib stream. Just need to reset 
             * and return an unused InputStream now.
             */
            pushback.unread(peeked, 0, headerLength);
            return new InflaterInputStream(pushback);
        } catch (DataFormatException e) {


            /* Presume that it's an RFC1951 deflate stream rather than RFC1950 zlib stream and try 
             * again. */

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            return new InflaterInputStream(pushback);
        } catch (DataFormatException e) {


            /* Presume that it's an RFC1951 deflate stream rather than RFC1950 zlib stream and try 
             * again. */
            pushback.unread(peeked, 0, headerLength);
            return new InflaterInputStream(pushback, new Inflater(true));
        }
    }


    /**

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        try {
            PushbackInputStream pin = 
                new PushbackInputStream(connection.getInputStream());
            int c = pin.read();
            if (c != -1) {
                pin.unread((byte)c);
                in = pin;
            }
        } catch (IOException ioe) {
            // ignore
        }

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