org.htmlparser.lexer
Class Stream
InputStream
org.htmlparser.lexer.Stream
- Runnable
public class Stream
extends InputStream
implements Runnable
Provides for asynchronous fetching from a stream.
protected static int | BUFFER_SIZE - An initial buffer size.
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protected static int | EOF - Return value when no more characters are left.
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int | fills - The number of calls to fill.
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byte[] | mBuffer - The bytes read so far.
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protected int | mContentLength - The content length from the HTTP header.
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protected InputStream | mIn - The underlying stream.
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int | mLevel - The number of valid bytes in the buffer.
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protected int | mMark - The bookmark.
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protected int | mOffset - The offset of the next byte returned by read().
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int | reallocations - The number of reallocations.
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int | synchronous - The number of synchronous (blocking) fills.
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Stream(InputStream in) - Construct a stream with no assumptions about the number of bytes available.
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Stream(InputStream in, int bytes) - Construct a stream to read the given number of bytes.
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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.
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void | close() - Closes this input stream and releases any system resources associated
with the stream.
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protected boolean | fill(boolean force) - Fetch more bytes from the underlying stream.
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void | mark(int readlimit) - Marks the current position in this input stream.
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boolean | markSupported() - Tests if this input stream supports the
mark and
reset methods.
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int | read() - Reads the next byte of data from the input stream.
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void | reset() - Repositions this stream to the position at the time the
mark method was last called on this input stream.
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void | run() - Continually read the underlying stream untill exhausted.
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BUFFER_SIZE
protected static final int BUFFER_SIZE
An initial buffer size.
EOF
protected static final int EOF
Return value when no more characters are left.
fills
public int fills
The number of calls to fill.
Note: to be removed.
mBuffer
public byte[] mBuffer
The bytes read so far.
mContentLength
protected int mContentLength
The content length from the HTTP header.
mIn
protected InputStream mIn
The underlying stream.
mLevel
public int mLevel
The number of valid bytes in the buffer.
mMark
protected int mMark
The bookmark.
mOffset
protected int mOffset
The offset of the next byte returned by read().
reallocations
public int reallocations
The number of reallocations.
Note: to be removed.
synchronous
public int synchronous
The number of synchronous (blocking) fills.
Note: to be removed.
Stream
public Stream(InputStream in)
Construct a stream with no assumptions about the number of bytes available.
in
- The input stream to use.
Stream
public Stream(InputStream in,
int bytes)
Construct a stream to read the given number of bytes.
in
- The input stream to use.bytes
- The maximum number of bytes to read.
This should be set to the ContentLength from the HTTP header.
A negative or zero value indicates an unknown number of bytes.
available
public int available()
throws IOException
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. The next caller might be the same thread or or
another thread.
- The number of bytes that can be read from this input stream
without blocking.
close
public void close()
throws IOException
Closes this input stream and releases any system resources associated
with the stream.
fill
protected boolean fill(boolean force)
throws IOException
Fetch more bytes from the underlying stream.
Has no effect if the underlying stream has been drained.
force
- If true
, an attempt is made to read from the
underlying stream, even if bytes are available, If false
,
a read of the underlying stream will not occur if there are already
bytes available.
true
if not at the end of the input stream.
mark
public void mark(int readlimit)
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
arguments tells this input stream to
allow that many bytes to be read before the mark position gets
invalidated.
The general contract of
mark
is that, if the method
markSupported
returns
true
, the stream somehow
remembers all the bytes read after the call to
mark
and
stands ready to supply those same bytes again if and whenever the method
reset
is called. However, the stream is not required to
remember any data at all if more than
readlimit
bytes are
read from the stream before
reset
is called.
markSupported
public boolean markSupported()
Tests if this input stream supports the mark
and
reset
methods. Whether or not mark
and
reset
are supported is an invariant property of a
particular input stream instance. The markSupported
method
of InputStream
returns false
.
read
public int read()
throws IOException
Reads the next byte of data from the 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.
- The next byte of data, or
-1
if the end of the
stream is reached.
reset
public void reset()
throws IOException
Repositions this stream to the position at the time the
mark
method was last called on this input stream.
The general contract of
reset
is:
- If the method
markSupported
returns
true
, then:
- If the method
mark
has not been called since
the stream was created, or the number of bytes read from the stream
since mark
was last called is larger than the argument
to mark
at that last call, then an
IOException
might be thrown.
- If such an
IOException
is not thrown, then the
stream is reset to a state such that all the bytes read since the
most recent call to mark
(or since the start of the
file, if mark
has not been called) will be resupplied
to subsequent callers of the read
method, followed by
any bytes that otherwise would have been the next input data as of
the time of the call to reset
.
If the method markSupported
returns
false
, then:
- The call to
reset
may throw an
IOException
.
- If an
IOException
is not thrown, then the stream
is reset to a fixed state that depends on the particular type of the
input stream and how it was created. The bytes that will be supplied
to subsequent callers of the read
method depend on the
particular type of the input stream.
run
public void run()
Continually read the underlying stream untill exhausted.
| © 2005 Derrick Oswald Mai 08, 2008 |
HTML Parser is an open source library released under LGPL. |  |