Examples of java.io.Reader.mark()

java.io.Reader.mark()
Set a Mark position in this Reader. The parameter readLimit indicates how many characters can be read before a mark is invalidated. Sending reset() will reposition the reader back to the marked position provided readLimit has not been surpassed.
This default implementation simply throws IOException and concrete subclasses must provide their own implementations. @param readLimit an int representing how many characters must be read before invalidating the mark. @throws IOException If an error occurs attempting mark this Reader.

                    iri = null; // Don't bother user with generic IRI syntax
                    Reader reader = new BufferedReader(
                            new Utf8PercentDecodingReader(new StringReader(
                                    "function(event){" + tail.toString() + "}")));
                    // XXX CharSequenceReader
                    reader.mark(1);
                    int c = reader.read();
                    if (c != 0xFEFF) {
                        reader.reset();
                    }
                    try {

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      reader = new UnlimitedMarkReader(srcReader);




      // Mark it all, read, reset, read
      chArray = new char[32];
      reader.mark(1);
      assertEquals(16, reader.read(chArray));
      assertEquals(-1, reader.read());
      assertEquals(sData, new String(chArray, 0, 16));
      reader.reset();
      assertEquals(16, reader.read(chArray));

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      reader = new UnlimitedMarkReader(srcReader);




      // Mark, read half, reset, read all
      chArray = new char[32];
      reader.mark(1);
      assertEquals(8, reader.read(chArray, 0, 8));
      assertEquals("01234567", new String(chArray, 0, 8));
      reader.reset();
      assertEquals(16, reader.read(chArray));
      assertEquals(sData, new String(chArray, 0, 16));

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      // Mark at EOF
      chArray = new char[32];
      assertEquals(16, reader.read(chArray));
      assertEquals(-1, reader.read());
      assertEquals(sData, new String(chArray, 0, 16));
      reader.mark(10);
      assertEquals(-1, reader.read());
      reader.reset();
      assertEquals(-1, reader.read());


      srcReader.reset();

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      // Tests the skip method
      assertEquals('0', reader.read());
      assertEquals(1, reader.skip(1));
      assertEquals(0, reader.skip(0));
      assertEquals('2', reader.read());
      reader.mark(1);
      assertEquals('3', reader.read());
      assertEquals(2, reader.skip(2));
      assertEquals('6', reader.read());
      reader.reset();
      assertEquals('3', reader.read());

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      assertEquals('3', reader.read());
      assertEquals('4', reader.read());
      assertEquals('5', reader.read());
      assertEquals(2, reader.skip(2));  // skips across buffer boundary
      assertEquals('8', reader.read());
      reader.mark(1);
      assertEquals(7, reader.skip(10));
      assertEquals(-1, reader.read());
      reader.reset();
      assertEquals('9', reader.read());
   }

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         reader = new NoCloseReader(reader);
         initParse(rootPart, tobj, nEnvelope);


         if (bRestartable)
         {
            reader.mark(1024);
         }


         XMLUtil.parse(reader, this, schemaResourceMap);


         if (m_bRestart)

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            char[] cbuf = new char[512]; // arbitrary sized header to examine for MIME type
            int nLength;


            try
            {
               reader.mark(cbuf.length);
               nLength = reader.read(cbuf);
               reader.reset();
            }
            catch (IOException e)
            {

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      Reader reader = getReader();


      if (sMethod.equals(HTTP.METHOD_DELETE))
      {
         reader.mark(1);


         if (reader.read() < 0)
         {
            return new XMLChange1Request(new TransferObject(oid, metaclass.getName(), "delete", 0), null);
         }

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    }


    private static Reader ensureNonEmptyReader(Reader reader) throws XMLStreamException {
        try {
            Reader mr = reader.markSupported() ? reader : new BufferedReader(reader);
            mr.mark(1);
            if (mr.read() == -1) {
                throw new XMLStreamException("JSON expression can not be empty!");
            }
            mr.reset();
            return mr;

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