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## com.tangosol.io
Class Utf8Reader

`java.lang.Object
java.io.Reader
com.tangosol.io.Utf8Reader`

All Implemented Interfaces:
  Closeable, Readable

      public class Utf8Reader

extends Reader

A Utf8Reader is used to read character data from an underlying stream.

Author:
  cp 2002.01.04

Field Summary

Fields inherited from class java.io.Reader
`lock`

Constructor Summary
`Utf8Reader(byte[] ab)` Construct a Utf8Reader that reads the input from a byte array.
`Utf8Reader(InputStream stream)` Construct a Utf8Reader that reads the input from an InputStream.

Method Summary
`void` | `close()` Close the stream.
`void` | `mark(int cchLimit)` Mark the present position in the stream.
`boolean` | `markSupported()` Tell whether this stream supports the mark() operation.
`int` | `read()` Read a single character.
`int` | `read(char[] ach)` Read characters into an array.
`int` | `read(char[] ach, int of, int cch)` Read characters into a portion of an array.
`boolean` | `ready()` Tell whether this stream is ready to be read.
`void` | `reset()` Reset the stream.
`long` | `skip(long cch)` Skip characters.

Methods inherited from class java.io.Reader
`read`

Constructor Detail

### Utf8Reader

    public Utf8Reader(byte[] ab)

  Construct a Utf8Reader that reads the input from a byte array.

### Utf8Reader

    public Utf8Reader(InputStream stream)

  Construct a Utf8Reader that reads the input from an InputStream.
  Parameters:
    `stream` - the underlying stream to write to

Method Detail

### read

    public int read()
             throws IOException

  Read a single character. This method will block until a character is available, an I/O error occurs, or the end of the stream is reached.

  Subclasses that intend to support efficient single-character input should override this method.

  Overrides:
    `read` in class `Reader`
  Returns:
    The character read, as an integer in the range 0 to 65535 (`0x00-0xffff`), or -1 if the end of the stream has been reached
  Throws:
    `IOException` - If an I/O error occurs

### read

    public int read(char[] ach)
             throws IOException

  Read characters into an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.
  Overrides:
    `read` in class `Reader`
  Parameters:
    `ach` - Destination buffer
  Returns:
    The number of bytes read, or -1 if the end of the stream has been reached
  Throws:
    `IOException` - If an I/O error occurs

### read

    public int read(char[] ach,
                    int of,
                    int cch)
             throws IOException

  Read characters into a portion of an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.
  Specified by:
    `read` in class `Reader`
  Parameters:
    `ach` - array of characters to read into
    `of` - offset into the array at which to start storing characters
    `cch` - maximum number of characters to read
  Returns:
    the number of characters read, or -1 if the end of the stream has been reached
  Throws:
    `IOException` - If an I/O error occurs

### skip

    public long skip(long cch)
              throws IOException

  Skip characters. This method will block until some characters are available, an I/O error occurs, or the end of the stream is reached.
  Overrides:
    `skip` in class `Reader`
  Parameters:
    `cch` - The number of characters to skip
  Returns:
    The number of characters actually skipped
  Throws:
    `IllegalArgumentException` - If `n` is negative.
    `IOException` - If an I/O error occurs

### ready

    public boolean ready()
                  throws IOException

  Tell whether this stream is ready to be read.
  Overrides:
    `ready` in class `Reader`
  Returns:
    True if the next read() is guaranteed not to block for input, false otherwise. Note that returning false does not guarantee that the next read will block.
  Throws:
    `IOException` - If an I/O error occurs

### markSupported

    public boolean markSupported()

  Tell whether this stream supports the mark() operation. The default implementation always returns false. Subclasses should override this method.
  Overrides:
    `markSupported` in class `Reader`
  Returns:
    true if and only if this stream supports the mark operation.

### mark

    public void mark(int cchLimit)
              throws IOException

  Mark the present position in the stream. Subsequent calls to reset() will attempt to reposition the stream to this point. Not all character-input streams support the mark() operation.
  Overrides:
    `mark` in class `Reader`
  Parameters:
    `cchLimit` - Limit on the number of characters that may be read while still preserving the mark. After reading this many characters, attempting to reset the stream may fail.
  Throws:
    `IOException` - If the stream does not support mark(), or if some other I/O error occurs

### reset

    public void reset()
               throws IOException

  Reset the stream. If the stream has been marked, then attempt to reposition it at the mark. If the stream has not been marked, then attempt to reset it in some way appropriate to the particular stream, for example by repositioning it to its starting point. Not all character-input streams support the reset() operation, and some support reset() without supporting mark().
  Overrides:
    `reset` in class `Reader`
  Throws:
    `IOException` - If the stream has not been marked, or if the mark has been invalidated, or if the stream does not support reset(), or if some other I/O error occurs

### close

    public void close()
               throws IOException

  Close the stream. Once a stream has been closed, further read(), ready(), mark(), or reset() invocations will throw an IOException. Closing a previously-closed stream, however, has no effect.
  Specified by:
    `close` in interface `Closeable`
  Specified by:
    `close` in class `Reader`
  Throws:
    `IOException` - If an I/O error occurs

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