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:

java.io.Closeable, java.lang.AutoCloseable, ByteInput

public class LimitedByteInput
extends ByteInputStream

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

Field Summary

Fields

Modifier and Type	Field and Description
private long	count
private long	limit

Fields inherited from class org.jboss.marshalling.ByteInputStream

byteInput

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
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

Field Detail

limit

private final long limit

count

private long count

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 java.io.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:

java.io.IOException - if an error occurs

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.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:

java.io.IOException - if an error occurs

skip

public long skip(long n)
          throws java.io.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:

java.io.IOException - if an error occurs