org.jboss.marshalling
Class LimitedByteInput

java.lang.Object
  java.io.InputStream
      org.jboss.marshalling.SimpleByteInput
          org.jboss.marshalling.ByteInputStream
              org.jboss.marshalling.LimitedByteInput

All Implemented Interfaces:

Closeable, ByteInput

public class LimitedByteInput
extends ByteInputStream

A limited byte input stream. Throws an exception if too many bytes are read.

Field Summary

Fields inherited from class org.jboss.marshalling.ByteInputStream

byteInput

Constructor Summary

LimitedByteInput(ByteInput byteInput, long limit)
Create a new instance.

Method Summary

int	read() Reads the next byte of data from the input stream.
int	read(byte[] b, int off, int len) Read some bytes from the input stream into the given array.
long	skip(long n) Skips over and discards up to n bytes of data from this input stream.

Methods inherited from class org.jboss.marshalling.ByteInputStream

available, close, read

Methods inherited from class java.io.InputStream

mark, markSupported, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

LimitedByteInput

public LimitedByteInput(ByteInput byteInput,
                        long limit)

Create a new instance.

Parameters:

byteInput - the byte input to read from

limit - the maximum number of bytes to read

Method Detail

read

public int read()
         throws IOException

Reads the next byte of data from the input stream. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

Specified by:

read in interface ByteInput

Overrides:

read in class ByteInputStream

Returns:

the next byte, or -1 if the end of stream has been reached

Throws:

IOException - if an error occurs

read

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

Read some bytes from the input stream into the given array. Returns the number of bytes actually read (possibly zero), or -1 if the end of stream has been reached.

Specified by:

read in interface ByteInput

Overrides:

read in class ByteInputStream

Parameters:

b - the destination array

off - the offset into the array into which data should be read

len - the number of bytes to attempt to fill in the destination array

Returns:

the number of bytes read (possibly zero), or -1 if the end of stream has been reached

Throws:

IOException - if an error occurs

skip

public long skip(long n)
          throws IOException

Skips over and discards up to n bytes of data from this input stream. If the end of stream is reached, this method returns 0 in order to be consistent with InputStream.skip(long).

Specified by:

skip in interface ByteInput

Overrides:

skip in class ByteInputStream

Parameters:

n - the number of bytes to attempt to skip

Returns:

the number of bytes skipped

Throws:

IOException - if an error occurs