public class ImageInputStreamAdapter extends FilterInputStream
in| Constructor and Description |
|---|
ImageInputStreamAdapter(ImageInputStream iis) |
| Modifier and Type | Method and Description |
|---|---|
int |
available()
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.
|
void |
close()
Closes this input stream and releases any system resources associated
with the stream.
|
void |
mark(int readlimit)
Marks the current position in this input stream.
|
boolean |
markSupported()
Tests if this input stream supports the
mark and
reset methods. |
int |
read()
Reads the next byte of data from this input stream.
|
int |
read(byte[] b,
int off,
int len)
Reads up to
len bytes of data from this input stream into an
array of bytes. |
void |
reset()
Repositions this stream to the position at the time the
mark
method was last called on this input stream. |
long |
skip(long n) |
readpublic ImageInputStreamAdapter(ImageInputStream iis)
public int read()
throws IOException
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.
read in class FilterInputStream-1 if the end of the
stream is reached.IOException - if an I/O error occurs.FilterInputStream.inpublic int read(byte[] b,
int off,
int len)
throws IOException
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.
read in class FilterInputStreamb - the buffer into which the data is read.off - the start offset in the destination array blen - the maximum number of bytes read.-1 if there is no more data because the end of the
stream has been reached.NullPointerException - If b is null.IndexOutOfBoundsException - If off is negative, len is
negative, or len is greater than
b.length - offIOException - if an I/O error occurs.FilterInputStream.inpublic long skip(long n)
throws IOException
This method simply performs in.skip(n).
skip in class FilterInputStreamIOExceptionpublic int available()
throws IOException
This method returns the result of in.available().
available in class FilterInputStreamIOException - if an I/O error occurs.public void close()
throws IOException
in.close().close in interface Closeableclose in interface AutoCloseableclose in class FilterInputStreamIOException - if an I/O error occurs.FilterInputStream.inpublic void mark(int readlimit)
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).
mark in class FilterInputStreamreadlimit - the maximum limit of bytes that can be read before the mark
position becomes invalid.FilterInputStream.in,
FilterInputStream.reset()public void reset()
throws IOException
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.
reset in class FilterInputStreamIOException - if the stream has not been marked or if the mark has been
invalidated.FilterInputStream.in,
FilterInputStream.mark(int)public boolean markSupported()
mark and
reset methods. This method simply performs
in.markSupported().markSupported in class FilterInputStreamtrue if this stream type supports the
mark and reset method;
false otherwise.FilterInputStream.in,
InputStream.mark(int),
InputStream.reset()Copyright © 2011-2014. All Rights Reserved.