org.hd.d.pg2k.svrCore
Class GenUtils.LengthLimitedOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          org.hd.d.pg2k.svrCore.GenUtils.LengthLimitedOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable

Enclosing class:

GenUtils

public static final class GenUtils.LengthLimitedOutputStream
extends java.io.FilterOutputStream

Prevents more than a specified number of bytes being written to the output stream. Attempting to exceed the limit will result in an IOException being thrown.

Specifically, this will veto the first write that would exceed the limit and all subsequent (non-zero) writes.

Data up until the limit will be written.

Thread-safe.

limit

private final int limit

The maximum number of bytes to be written; non-negative.

bytesWritten

private int bytesWritten

The number of bytes written so far; non-negative. Advances monotonically.

Accessed under the instance lock only.

GenUtils.LengthLimitedOutputStream

public GenUtils.LengthLimitedOutputStream(java.io.OutputStream out,
                                          int limit)

Creates an output stream with the specified write limit.

Parameters:

out - the output stream

limit - maximum number of bytes to be allowed; non-negative

getBytesWritten

public int getBytesWritten()

Retrieve the number of bytes written so far; non-negative.

write

public void write(int b)
           throws java.io.IOException

Overrides:

write in class java.io.FilterOutputStream

Throws:

java.io.IOException

write

public void write(byte[] b,
                  int off,
                  int len)
           throws java.io.IOException

Overrides:

write in class java.io.FilterOutputStream

Throws:

java.io.IOException