FilterInputStream JDK 1.6)

public int available () throws IOException [Overrides InputStream]

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream.

public void close () throws IOException [Overrides InputStream]

Closes this input stream and releases any system resources associated with the stream.

Closes this input stream and releases any system resources
associated with the stream.
This
method simply performs in.close().
Throws:
- IOException - if an I/O error occurs.
See Also: FilterInputStream.in,

publicsynchronized void mark (int readlimit) [Overrides InputStream]

Marks the current position in this input stream.

Marks the current position in this input stream. A subsequent call to the reset method repositions this stream at the last marked position so that subsequent reads re-read the same bytes.

The readlimit argument tells this input stream to allow that many bytes to be read before the mark position gets invalidated.

This method simply performs in.mark(readlimit).
Parameters:
- readlimit - the maximum limit of bytes that can be read before the mark position becomes invalid.
See Also: FilterInputStream.in, FilterInputStream.reset(),

public boolean markSupported () [Overrides InputStream]

Tests if this input stream supports the mark and reset methods.

Tests if this input stream supports the mark
and reset methods.
This method
simply performs in.markSupported().
Returns: true if this stream type supports the mark and reset method; false otherwise.
See Also: FilterInputStream.in, InputStream.mark(int), InputStream.reset(),

public int read () throws IOException [Specified in InputStream]

Reads the next byte of data from this input stream.

Reads the next byte of data from this 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.

This method simply performs in.read() and returns the result.
Returns: the next byte of data, or -1 if the end of the stream is reached.
Throws:
- IOException - if an I/O error occurs.
See Also: FilterInputStream.in,

public int read (byte[] b) throws IOException [Overrides InputStream]

Reads up to byte.length bytes of data from this input stream into an array of bytes.

Reads up to byte.length bytes of data from this input stream into an array of bytes. This method blocks until some input is available.

This method simply performs the call read(b, 0, b.length) and returns the result. It is important that it does not do in.read(b) instead; certain subclasses of FilterInputStream depend on the implementation strategy actually used.
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.
Parameters:
- b - the buffer into which the data is read.
Throws:
- IOException - if an I/O error occurs.
See Also: FilterInputStream.read(byte[], int, int),

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

Reads up to len bytes of data from this input stream into an array of bytes.

Reads up to len bytes of data from this input stream into an array of bytes. If len is not zero, the method blocks until some input is available; otherwise, no bytes are read and 0 is returned.

This method simply performs in.read(b, off, len) and returns the result.
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.
Parameters:
- b - the buffer into which the data is read.
- off - the start offset in the destination array b
- len - the maximum number of bytes read.
Throws:
- NullPointerException - If b is null.
- IndexOutOfBoundsException - If off is negative, len is negative, or len is greater than b.length - off
- IOException - if an I/O error occurs.
See Also: FilterInputStream.in,

publicsynchronized void reset () throws IOException [Overrides InputStream]

Repositions this stream to the position at the time the mark method was last called on this input stream.

This method simply performs in.reset().

Stream marks are intended to be used in situations where you need to read ahead a little to see what's in the stream. Often this is most easily done by invoking some general parser. If the stream is of the type handled by the parse, it just chugs along happily. If the stream is not of that type, the parser should toss an exception when it fails. If this happens within readlimit bytes, it allows the outer code to reset the stream and try another parser.
Throws:
- IOException - if the stream has not been marked or if the mark has been invalidated.
See Also: FilterInputStream.in, FilterInputStream.mark(int),

public long skip (long n) throws IOException [Overrides InputStream]

Skips over and discards n bytes of data from this input stream.

Skips over and discards n bytes of data from this input stream. The skip method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly 0. This may result from any of a number of conditions; reaching end of file before n bytes have been skipped is only one possibility. The actual number of bytes skipped is returned. If n is negative, no bytes are skipped.

The skip method of this class creates a byte array and then repeatedly reads into it until n bytes have been read or the end of the stream has been reached. Subclasses are encouraged to provide a more efficient implementation of this method. For instance, the implementation may depend on the ability to seek.

This method simply performs in.skip(n).