Package org.python.core.io
Class BufferedWriter
- java.lang.Object
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- org.python.core.io.IOBase
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- org.python.core.io.BufferedIOBase
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- org.python.core.io.BufferedIOMixin
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- org.python.core.io.BufferedWriter
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- Direct Known Subclasses:
LineBufferedWriter
public class BufferedWriter extends BufferedIOMixin
Buffer for a writable sequential RawIO object.- Author:
- Philip Jenvey
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Field Summary
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Fields inherited from class org.python.core.io.IOBase
DEFAULT_BUFFER_SIZE
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Constructor Summary
Constructors Constructor Description BufferedWriter(RawIOBase rawIO, int bufferSize)
Construct a BufferedWriter of bufferSize, wrapping the given RawIOBase.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
buffered()
Return true if this objects buffer contains any data.void
flush()
Flushes write buffers, if applicable.int
read1(java.nio.ByteBuffer bytes)
Reads up to bytes.remaining() bytes.boolean
readable()
Return whether this file was opened for reading.java.nio.ByteBuffer
readall()
Read until EOF.int
readinto(java.nio.ByteBuffer bytes)
Read up to bytes.remaining() bytes into the given ByteBuffer.long
seek(long pos, int whence)
Seek to byte offset pos relative to position indicated by whence: 0 Start of stream (the default). pos should be >= 0; 1 Current position - whence may be negative; 2 End of stream - whence usually negative.long
tell()
Return the current stream position.int
write(java.nio.ByteBuffer bytes)
Write the given ByteBuffer to the IO stream.-
Methods inherited from class org.python.core.io.BufferedIOMixin
asInputStream, asOutputStream, close, closed, fileno, isatty, truncate, writable
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Methods inherited from class org.python.core.io.BufferedIOBase
clear, peek, read
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Methods inherited from class org.python.core.io.IOBase
checkClosed, checkReadable, checkWritable, seek
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Constructor Detail
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BufferedWriter
public BufferedWriter(RawIOBase rawIO, int bufferSize)
Construct a BufferedWriter of bufferSize, wrapping the given RawIOBase.- Parameters:
rawIO
-bufferSize
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Method Detail
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write
public int write(java.nio.ByteBuffer bytes)
Description copied from class:BufferedIOBase
Write the given ByteBuffer to the IO stream. Returns the number of bytes written, which may be less than bytes.remaining().- Overrides:
write
in classBufferedIOBase
- Parameters:
bytes
- a ByteBuffer value- Returns:
- the number of bytes written as an int
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flush
public void flush()
Description copied from class:IOBase
Flushes write buffers, if applicable. This is a no-op for read-only and non-blocking streams.- Overrides:
flush
in classBufferedIOMixin
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tell
public long tell()
Description copied from class:IOBase
Return the current stream position.- Overrides:
tell
in classBufferedIOMixin
- Returns:
- a long position value
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seek
public long seek(long pos, int whence)
Description copied from class:IOBase
Seek to byte offset pos relative to position indicated by whence: 0 Start of stream (the default). pos should be >= 0; 1 Current position - whence may be negative; 2 End of stream - whence usually negative. Returns the new absolute position.- Overrides:
seek
in classBufferedIOMixin
- Parameters:
pos
- a long position valuewhence
- an int whence value- Returns:
- a long position value seeked to
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buffered
public boolean buffered()
Description copied from class:BufferedIOBase
Return true if this objects buffer contains any data.- Overrides:
buffered
in classBufferedIOBase
- Returns:
- boolean whether or not any data is currently buffered
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readall
public java.nio.ByteBuffer readall()
Description copied from class:BufferedIOBase
Read until EOF.- Overrides:
readall
in classBufferedIOBase
- Returns:
- a ByteBuffer containing the bytes read
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readinto
public int readinto(java.nio.ByteBuffer bytes)
Description copied from class:BufferedIOBase
Read up to bytes.remaining() bytes into the given ByteBuffer. Returns number of bytes read (0 for EOF).- Overrides:
readinto
in classBufferedIOBase
- Parameters:
bytes
- a ByteBuffer to read bytes into- Returns:
- the amount of data read as an int
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read1
public int read1(java.nio.ByteBuffer bytes)
Description copied from class:BufferedIOBase
Reads up to bytes.remaining() bytes. Returns up to bytes.remaining() bytes. If at least one byte is buffered, we only return buffered bytes. Otherwise, we do one raw read.- Overrides:
read1
in classBufferedIOBase
- Parameters:
bytes
- a ByteBuffer to read bytes into- Returns:
- the amount of data read as an int
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readable
public boolean readable()
Description copied from class:IOBase
Return whether this file was opened for reading.- Overrides:
readable
in classBufferedIOMixin
- Returns:
- true if the file was opened for reading
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