public class JavaShellNonBlockingInputStreamAdapter extends FilterInputStream implements JavaShellNonBlockingInputStream
in| Constructor and Description |
|---|
JavaShellNonBlockingInputStreamAdapter(String name,
InputStream in) |
| Modifier and Type | Method and Description |
|---|---|
int |
available()
Returns an estimate of the number of bytes that can be readAll (or
skipped over) from this input stream without blocking by the next
invocation of a method for this input stream.
|
void |
close()
Closes this input stream and releases any system resources associated
with the stream.
|
boolean |
hasMoreBytes() |
void |
noMoreBytes() |
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. |
int |
readNonBlocking(byte[] b,
int off,
int len,
long timeout) |
int |
readNonBlocking(byte[] b,
long timeout) |
long |
skip(long n)
Skips over and discards
n bytes of data from this input
stream. |
mark, markSupported, resetclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitmark, markSupported, resetpublic JavaShellNonBlockingInputStreamAdapter(String name, InputStream in)
public int read()
throws IOException
JavaShellNonBlockingInputStreamint 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 interface JavaShellNonBlockingInputStreamread 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
JavaShellNonBlockingInputStreamb. The number of bytes actually readAll 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 readAll and
0 is returned; otherwise, there is an attempt to readAll 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 readAll and stored into b.
The first byte readAll is stored into element b[0], the
next one into b[1], and so on. The number of bytes readAll is,
at most, equal to the length of b. Let k be the
number of bytes actually readAll; these bytes will be stored in elements
b[0] through b[k-1],
leaving elements b[k] through
b[b.length-1] unaffected.
The readAll(b) method for class InputStream
has the same effect as:
readAll(b, 0, b.length) read in interface JavaShellNonBlockingInputStreamread in class FilterInputStreamb - the buffer into which the data is readAll.-1 if there is no more data because the end of
the stream has been reached.IOException - If the first byte cannot be readAll 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
JavaShellNonBlockingInputStreamlen bytes of data from the input stream into
an array of bytes. An attempt is made to readAll as many as
len bytes, but a smaller number may be readAll.
The number of bytes actually readAll 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 readAll and
0 is returned; otherwise, there is an attempt to readAll 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 readAll and stored into b.
The first byte readAll is stored into element b[off], the
next one into b[off+1], and so on. The number of bytes readAll
is, at most, equal to len. Let k be the number of
bytes actually readAll; 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 readAll(b, off, len) method
for class InputStream simply calls the method
readAll() repeatedly. If the first such call results in an
IOException, that exception is returned from the call to
the readAll(b, off, len) method. If
any subsequent call to readAll() results in a
IOException, the exception is caught and treated as if it
were end of file; the bytes readAll up to that point are stored into
b and the number of bytes readAll before the exception
occurred is returned. The default implementation of this method blocks
until the requested amount of input data len has been readAll,
end of file is detected, or an exception is thrown. Subclasses are encouraged
to provide a more efficient implementation of this method.
read in interface JavaShellNonBlockingInputStreamread in class FilterInputStreamb - the buffer into which the data is readAll.off - the start offset in array b
at which the data is written.len - the maximum number of bytes to readAll.-1 if there is no more data because the end of
the stream has been reached.IOException - If the first byte cannot be readAll 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
JavaShellNonBlockingInputStreamn 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, the skip method for class InputStream always
returns 0, and no bytes are skipped. Subclasses may handle the negative
value differently.
The skip method of this class creates a
byte array and then repeatedly reads into it until n bytes
have been readAll 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.
skip in interface JavaShellNonBlockingInputStreamskip 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 int available()
throws IOException
JavaShellNonBlockingInputStream Note that while some implementations of InputStream will return
the total number of bytes in the stream, many will not. It is
never correct to use the return value of this method to allocate
a buffer intended to hold all data in this stream.
A subclass' implementation of this method may choose to throw an
IOException if this input stream has been closed by
invoking the JavaShellNonBlockingInputStream.close() method.
The available method for class InputStream always
returns 0.
This method should be overridden by subclasses.
available in interface JavaShellNonBlockingInputStreamavailable in class FilterInputStream0 when
it reaches the end of the input stream.IOException - if an I/O error occurs.public int readNonBlocking(byte[] b,
long timeout)
throws IOException
readNonBlocking in interface JavaShellNonBlockingInputStreamIOExceptionpublic int readNonBlocking(byte[] b,
int off,
int len,
long timeout)
throws IOException
readNonBlocking in interface JavaShellNonBlockingInputStreamIOExceptionpublic void noMoreBytes()
noMoreBytes in interface JavaShellNonBlockingInputStreampublic boolean hasMoreBytes()
hasMoreBytes in interface JavaShellNonBlockingInputStreampublic void close()
throws IOException
JavaShellNonBlockingInputStream The close method of InputStream does
nothing.
close in interface Closeableclose in interface AutoCloseableclose in interface JavaShellNonBlockingInputStreamclose in class FilterInputStreamIOException - if an I/O error occurs.Copyright © 2022 vpc open source initiative. All rights reserved.