Examples of java.io.Reader.reset()

java.io.Reader.reset()
Reset this Readers position to the last mark() location. Invocations of read()/skip() will occur from this new location. If this Reader was not marked, the implementation of reset() is implementation specific. See the comment for the specific Reader subclass for implementation details. The default action is to throw IOException. @throws IOException If a problem occured or the receiver does not support mark()/reset().

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


         reader.reset();
      }


      Object obj = unmarshaller.deserialize(reader);


      if (obj instanceof TransferObject)

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            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;
        } catch (IOException ex) {
            throw new XMLStreamException(ex);
        }
    }

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        chars)), 12);


    in.skip(6);
    in.mark(14);
    in.read(new char[14], 0, 14);
    in.reset();
    assertTrue("Wrong chars", in.read() == (char) 6
        && in.read() == (char) 7);


    in = new BufferedReader(new Support_StringReader(new String(chars)), 12);
    in.skip(6);

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    in = new BufferedReader(new Support_StringReader(new String(chars)), 12);
    in.skip(6);
    in.mark(8);
    in.skip(7);
    in.reset();
    assertTrue("Wrong chars 2", in.read() == (char) 6
        && in.read() == (char) 7);
    
        BufferedReader br = new BufferedReader(new StringReader("01234"), 2);
        br.mark(3);

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        assertTrue("Mark Should be Supported", reader.markSupported());


        // No Mark
        try {
            reader.reset();
            fail("Read limit exceeded, expected IOException ");
        } catch (Exception e) {
            assertEquals("No Mark IOException message",
                         "No position has been marked",
                         e.getMessage());

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        for (int i = 0; i < 3; i++) {
            assertEquals("Read After Mark [" + i +"]",  (position + i), reader.read());
        }


        // Reset
        reader.reset();


        // Read From marked position
        for (int i = 0; i < readlimit + 1; i++) {
            assertEquals("Read After Reset [" + i +"]",  (position + i), reader.read());
        }

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            assertEquals("Read After Reset [" + i +"]",  (position + i), reader.read());
        }


        // Reset after read limit passed
        try {
            reader.reset();
            fail("Read limit exceeded, expected IOException ");
        } catch (Exception e) {
            assertEquals("Read limit IOException message",
                         "Marked position [" + position
                         + "] is no longer valid - passed the read limit ["

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        } catch (UnsupportedOperationException e) {
            assertEquals("mark() error message",  "Mark not supported", e.getMessage());
        }


        try {
            reader.reset();
            fail("reset() should throw UnsupportedOperationException");
        } catch (UnsupportedOperationException e) {
            assertEquals("reset() error message",  "Mark not supported", e.getMessage());
        }
    }

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        chars)), 12);


    in.skip(6);
    in.mark(14);
    in.read(new char[14], 0, 14);
    in.reset();
    assertTrue("Wrong chars", in.read() == (char) 6
        && in.read() == (char) 7);


    in = new BufferedReader(new Support_StringReader(new String(chars)), 12);
    in.skip(6);

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    in = new BufferedReader(new Support_StringReader(new String(chars)), 12);
    in.skip(6);
    in.mark(8);
    in.skip(7);
    in.reset();
    assertTrue("Wrong chars 2", in.read() == (char) 6
        && in.read() == (char) 7);
    
        BufferedReader br = new BufferedReader(new StringReader("01234"), 2);
        br.mark(3);

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