public final class PrivateInputStream extends InputStream
Constructor and Description |
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PrivateInputStream(BaseStream p)
Creates an input stream for the
Operation to read from |
Modifier and Type | Method and Description |
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int |
available()
Returns 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 the 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 offset,
int length)
Reads up to
len bytes of data from the input stream into
an array of bytes. |
void |
writeBytes(byte[] body,
int start)
Allows the
OperationImpl thread to add body data to the
input stream. |
mark, markSupported, reset, skip
public PrivateInputStream(BaseStream p)
Operation
to read fromp
- the connection this input stream is forpublic int available() throws IOException
available
in class InputStream
IOException
- if an I/O error occurspublic int read() throws IOException
read
in class InputStream
IOException
- if an I/O error occurspublic int read(byte[] b) throws IOException
InputStream
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 InputStream
b
- the buffer into which the data is 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 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 offset, int length) throws IOException
InputStream
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 InputStream
b
- the buffer into which the data is read.offset
- the start offset in array b
at which the data is written.length
- 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 void writeBytes(byte[] body, int start)
OperationImpl
thread to add body data to the
input stream.body
- the data to add to the streamstart
- the start of the body to array to copypublic void close() throws IOException
close
in interface Closeable
close
in interface AutoCloseable
close
in class InputStream
IOException
- this will never happen