com.vwp.io
Class ByteArrayReader

java.lang.Object
  java.io.Reader
      com.vwp.io.ByteArrayReader

All Implemented Interfaces:

Closeable, Readable

public class ByteArrayReader
extends Reader

Constructor Summary

ByteArrayReader(byte[] buf)
Create an ByteArrayReader from the specified array of bytes.

ByteArrayReader(byte[] buf, int offset, int length)
Create an ByteArrayReader from the specified array of bytes.

Method Summary

void	close() Close the stream.
void	mark(int readAheadLimit) Mark the present position in the stream.
boolean	markSupported() Tell whether this stream supports the mark() operation, which it does.
int	read() Read a single byteacter.
int	read(byte[] b, int off, int len) Read byteacters into a portion of an array.
int	read(char[] b, int off, int len)
String	readLine() Reads all bytes until the next \n
boolean	ready() Tell whether this stream is ready to be read.
void	reset() Reset the stream to the most recent mark, or to the beginning if it has never been marked.
long	skip(long n) Skip bytes.

Methods inherited from class java.io.Reader

read, read

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ByteArrayReader

public ByteArrayReader(byte[] buf)

Create an ByteArrayReader from the specified array of bytes.

Parameters:

buf - Input buffer (not copied)

ByteArrayReader

public ByteArrayReader(byte[] buf,
                       int offset,
                       int length)

Create an ByteArrayReader from the specified array of bytes.

Parameters:

buf - Input buffer (not copied)

offset - Offset of the first byte to read

length - Number of bytes to read

Method Detail

read

public int read()
         throws IOException

Read a single byteacter.

Overrides:

read in class Reader

Throws:

IOException - If an I/O error occurs

readLine

public String readLine()
                throws IOException

Reads all bytes until the next \n

Throws:

IOException - If an I/O error occurs

read

public int read(char[] b,
                int off,
                int len)

Specified by:

read in class Reader

read

public int read(byte[] b,
                int off,
                int len)
         throws IOException

Read byteacters into a portion of an array.

Parameters:

b - Destination buffer

off - Offset at which to start storing byteacters

len - Maximum number of byteacters to read

Returns:

The actual number of byteacters 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 n)
          throws IOException

Skip bytes.

Overrides:

skip in class Reader

Parameters:

n - The number of byteacters to skip

Returns:

The number of byteacters actually skipped

Throws:

IOException - If an I/O error occurs

ready

public boolean ready()
              throws IOException

Tell whether this stream is ready to be read. Bytearray readers are always ready to be read.

Overrides:

ready in class Reader

Throws:

IOException - If an I/O error occurs

markSupported

public boolean markSupported()

Tell whether this stream supports the mark() operation, which it does.

Overrides:

markSupported in class Reader

mark

public void mark(int readAheadLimit)
          throws IOException

Mark the present position in the stream. Subsequent calls to reset() will reposition the stream to this point.

Overrides:

mark in class Reader

Parameters:

readAheadLimit - Limit on the number of byteacters that may be read while still preserving the mark. Because the stream's input comes from a bytearray, there is no actual limit and this argument is ignored.

Throws:

IOException - If an I/O error occurs

reset

public void reset()
           throws IOException

Reset the stream to the most recent mark, or to the beginning if it has never been marked.

Overrides:

reset in class Reader

Throws:

IOException - If an I/O error occurs

close

public void close()

Close the stream.

Specified by:

close in interface Closeable

Specified by:

close in class Reader