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

      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      conn.setRequestProperty("Content-Type", "application/mercurial-0.1");
      conn.setRequestProperty("Content-Length", String.valueOf(outputLen));
      conn.connect();
      return new FilterOutputStream(conn.getOutputStream()) {
        public void close() throws IOException {
          super.close();
          if (debug) {
            dumpResponseHeader(u);
          }

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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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                // Get the serializer
                this.serializer = (Serializer) this.selector.select(serializerType);


                // Direct its output to the zip file, filtering calls to close()
                // (we don't want the archive to be closed by the serializer)
                this.serializer.setOutputStream(new FilterOutputStream(this.zipOutput) {
                    public void close() { /*nothing*/
                    }
                });


                // Set it as the current XMLConsumer

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            }


            this.currentPath = pkgName + fileName;
            this.currentBaos = new ByteArrayOutputStream();


            return new FilterOutputStream( this.currentBaos ) {
                public void close() {
                    // don't let this stream close
                }
            };
        }

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        this.encoding = encoding;


        // Intercept flush() downcalls from the writer; our caller
        // will call PGStream.flush() as needed.
        OutputStream interceptor = new FilterOutputStream(pg_output) {
                                       public void flush() throws IOException {
                                       }
                                       public void close() throws IOException {
                                           super.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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    // 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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        while (headersEnum.hasMoreElements()) {
            headersList.add(headersEnum.nextElement().getName().toLowerCase());
        }
        String[] headers = headersList.toArray(new String[0]);
        // Skip first 2 bytes
        OutputStream os = new FilterOutputStream(out) {
            private int nb = 0;
            public void write(int b) throws IOException {
                if (++nb > 2) {
                    super.write(b);
                }

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        try {
            TransientFileFactory fileFactory = TransientFileFactory.getInstance();
            final File tmpFile = fileFactory.createTransientFile("bin", null, null);


            return new FilterOutputStream(new FileOutputStream(tmpFile)) {


                public void close() throws IOException {
                    super.close();


                    PreparedStatement stmt = null;

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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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