Class SaslInputStream

public SaslInputStream(SaslClient client,
                       InputStream source)
            throws IOException

public SaslInputStream(SaslServer server,
                       InputStream source)
            throws IOException

public int available()
            throws IOException

This method returns the number of bytes that can be read from this stream before a read can block. A return of 0 indicates that blocking might (or might not) occur on the very next read attempt.

This method always returns 0 in this class

Overrides:

available in interface InputStream

Returns:

The number of bytes that can be read before blocking could occur

Throws:

IOException - If an error occurs

public void close()
            throws IOException

This method closes the stream. Any futher attempts to read from the stream may generate an IOException

This method does nothing in this class, but subclasses may override this method in order to provide additional functionality.

Specified by:

close in interface Closeable

close in interface AutoCloseable

Overrides:

close in interface InputStream

Throws:

IOException - If an error occurs, which can only happen in a subclass

public int read()
            throws IOException

Reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255. 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.

From a SASL mechanism provider's perspective, if a security layer has been negotiated, the underlying source is expected to contain SASL buffers, as defined in RFC 2222. Four octets in network byte order in the front of each buffer identify the length of the buffer. The provider is responsible for performing any integrity checking or other processing on the buffer before returning the data as a stream of octets. For example, the protocol driver's request for a single octet from the stream might; i.e. an invocation of this method, may result in an entire SASL buffer being read and processed before that single octet can be returned.

Overrides:

read in interface InputStream

Returns:

the next byte of data, or -1 if the end of the stream is reached.

Throws:

IOException - if an I/O error occurs.

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

Reads up to len bytes of data from the underlying source input stream into an array of bytes. An attempt is made to read as many as len bytes, but a smaller number may be read, possibly zero. The number of bytes actually read is returned as an integer.

This method blocks until input data is available, end of file is detected, or an exception is thrown.

If b is null, a NullPointerException is thrown.

If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown.

If len is zero, then no bytes are read and 0 is returned; otherwise, there is an attempt to read at least one byte. If no byte is available because the stream is at end of file, the value -1 is returned; otherwise, at least one byte is read and stored into b.

The first byte read is stored into element b[off], the next one into b[off+1], and so on. The number of bytes read is, at most, equal to len. Let k be the number of bytes actually read; these bytes will be stored in elements b[off] through b[off+k-1], leaving elements b[off+k] through b[off+len-1] unaffected.

In every case, elements b[0] through b[off] and elements b[off+len] through b[b.length-1] are unaffected.

If the first byte cannot be read for any reason other than end of file, then an IOException is thrown. In particular, an IOException is thrown if the input stream has been closed.

From the SASL mechanism provider's perspective, if a security layer has been negotiated, the underlying source is expected to contain SASL buffers, as defined in RFC 2222. Four octets in network byte order in the front of each buffer identify the length of the buffer. The provider is responsible for performing any integrity checking or other processing on the buffer before returning the data as a stream of octets. The protocol driver's request for a single octet from the stream might result in an entire SASL buffer being read and processed before that single octet can be returned.

Overrides:

read in interface InputStream

Parameters:

b - the buffer into which the data is read.

off - the start offset in array b at which the data is wricodeen.

len - the maximum number of bytes to read.

Returns:

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Throws:

IOException - if an I/O error occurs.