Examples of java.io.FilterOutputStream

java.io.FilterOutputStream
This class is the superclass of all classes that filter output streams. These streams sit on top of an already existing output stream (the underlying output stream) which it uses as its basic sink of data, but possibly transforming the data along the way or providing additional functionality.
The class FilterOutputStream itself simply overrides all methods of OutputStream with versions that pass all requests to the underlying output stream. Subclasses of FilterOutputStream may further override some of these methods as well as provide additional methods and fields. @author Jonathan Payne @version 1.32, 11/17/05 @since JDK1.0

      RandomAccessFile raf = null;
      PrintStream ps = System.out;
      if (args.length == 3) {  // input file, output file, get data for dump
        raf = new RandomAccessFile(args[0], "r");
        ps = new PrintStream(
                new FilterOutputStream(
                        new FileOutputStream(args[1], false)));
        displayData = args[2].equalsIgnoreCase("true");
      } else if (args.length == 2) {  // input file and output file for dump
        raf = new RandomAccessFile(args[0], "r");
        if (args[1].equalsIgnoreCase("true")
                || args[1].equalsIgnoreCase("false")) {
          displayData = args[1].equalsIgnoreCase("true");
        } else {
          ps = new PrintStream(
                  new FilterOutputStream(
                          new FileOutputStream(args[1], false)));
        }
      } else if (args.length == 1) {
        raf = new RandomAccessFile(args[0], "r");
      } else {

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    // need a quiet ping so temporarily disable the logwriter
    PrintWriter savWriter = logWriter;
    // DERBY-1571: If logWriter is null, stack traces are printed to
    // System.err. Set logWriter to a silent stream to suppress stack
    // traces too.
    FilterOutputStream silentStream = new FilterOutputStream(null) {
        public void write(int b) { }
        public void flush() { }
        public void close() { }
      };
    setLogWriter(new PrintWriter(silentStream));

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            readResult();
            savWriter = logWriter;
            // DERBY-1571: If logWriter is null, stack traces are printed to
            // System.err. Set logWriter to a silent stream to suppress stack
            // traces too.
            FilterOutputStream silentStream = new FilterOutputStream(null) {
                public void write(int b) {
                }


                public void flush() {
                }

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    }


    private static void writeBinary(File outputFile, Printable printable) throws IOException {
        OutputStream outputStream = null;
        if(outputFile == null) {
            outputStream = new FilterOutputStream(System.out) {


                @Override
                public void close() throws IOException {
                    flush();
                }

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    }


    private static void writeAscii(File outputFile, Writable writable) throws IOException {
        Writer writer = null;
        if(outputFile == null) {
            writer = new OutputStreamWriter(new FilterOutputStream(System.out) {


                @Override
                public void close() throws IOException {
                    flush();
                }

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               return value;
             }
          }));
      this.out = new DataOutputStream
        (new BufferedOutputStream
         (new FilterOutputStream(socket.getOutputStream()) {
             public void write(byte[] buf, int o, int len) throws IOException {
               out.write(buf, o, len);
               if (writingCall != null) {
                 writingCall.touch();
               }

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     * @return
     */
    OutputStream writeChecksummedTo(final long fileOffset, final int length) {
        final ByteArrayOutputStream baos = new ByteArrayOutputStream(length);
        OutputStream cos = checksumOutputStream(baos);
        return new FilterOutputStream(cos) {
            
            public void close() throws IOException {
                out.close();
                byte[] buf = baos.toByteArray();
                if(buf.length != length)

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     * @return
     */
    OutputStream writeChecksummedTo(final long fileOffset, final int length) {
        final ByteArrayOutputStream baos = new ByteArrayOutputStream(length);
        OutputStream cos = checker.checksumWriter(baos);
        return new FilterOutputStream(cos) {


            public void close() throws IOException {
                out.close();
                byte[] buf = baos.toByteArray();
                if (buf.length != length)

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  **
  ** The {@code write} methods will throw {@link IOException} if bytes
  ** different from the header are written.
  */
  public static OutputStream dimOutput(final byte[] hd, OutputStream s) {
    return new FilterOutputStream(s) {
      private int i = 0;


      @Override public void write(int b) throws IOException {
        if (i < hd.length) {
          if ((byte)b != hd[i]) { throw new IOException("byte " + i + ": expected '" + hd[i] + "'; got '" + b + "'."); }

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      consume(remoteErr);
      remoteIn.write(CMD_UNBUNDLE.getBytes());
      remoteIn.write('\n');
      writeParameters(Collections.singletonList(new Parameter("heads", l)));
      checkError();
      return new FilterOutputStream(remoteIn) {
        @Override
        public void close() throws IOException {
          out.flush();
          @SuppressWarnings("unused")
          int responseLen = readResponseLength();

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