public class BulkInputStreamWrapper extends FilterInputStream
in| Constructor and Description |
|---|
BulkInputStreamWrapper(InputStream s)
Creates a new instance of this input stream that wraps the provided
stream.
|
| Modifier and Type | Method and Description |
|---|---|
long |
getBytesRead()
Retrieves the number of bytes read through this input stream.
|
int |
read()
Reads the next byte of data from the input stream.
|
int |
read(byte[] b)
Reads some number of bytes from the input stream and stores them into the
buffer array
b. |
int |
read(byte[] b,
int off,
int len)
Reads up to
len bytes of data from the input stream into an
array of bytes. |
long |
skip(long n)
Skips over and discards
n bytes of data from this input
stream. |
available, close, mark, markSupported, resetpublic BulkInputStreamWrapper(InputStream s)
s - The input stream to be wrapped.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.
A subclass must provide an implementation of this method.
read in class FilterInputStream-1 if the end of the stream
is reached.IOException - if an I/O error occurs.public int read(byte[] b) throws IOException
b. 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 the length of b 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 the end of the
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[0], the next
one into b[1], and so on. The number of bytes read is, at
most, equal to the length of b. Let k be the number of
bytes actually read; these bytes will be stored in elements
b[0] through b[k-1], leaving
elements b[k] through
b[b.length-1] unaffected.
The read(b) method for class InputStream
has the same effect as:
read(b, 0, b.length) read in class FilterInputStreamb - the buffer into which the data is read.-1
is there is no more data because the end of the stream has been
reached.IOException - If the first byte cannot be read for any
reason other than the end of the file, if the
input stream has been closed, or if some other
I/O error occurs.InputStream.read(byte[], int, int)public int read(byte[] b, int off, int len) throws IOException
len bytes of data from the 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. 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 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.
The read(b, off, len) method for
class InputStream simply calls the method read()
repeatedly. If the first such call results in an IOException,
that exception is returned from the call to the read(b,
off, len) method. If any subsequent call to
read() results in a IOException, the exception is
caught and treated as if it were end of file; the bytes read up to that
point are stored into b and the number of bytes read before
the exception occurred is returned. The default implementation of this
method blocks until the requested amount of input data len has
been read, end of file is detected, or an exception is thrown. Subclasses
are encouraged to provide a more efficient implementation of this method.
read in class FilterInputStreamb - the buffer into which the data is read.off - the start offset in array b at which the data is
written.len - the maximum number of bytes to read.-1
if there is no more data because the end of the stream has been
reached.IOException - If the first byte cannot be read for any
reason other than end of file, or if the
input stream has been closed, or if some
other I/O error occurs.InputStream.read()public long skip(long n) throws IOException
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.skip in class FilterInputStreamn - the number of bytes to be skipped.IOException - if the stream does not support seek, or if some
other I/O error occurs.public long getBytesRead()
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