org.armedbear.lisp.util

Class RandomAccessCharacterFile

java.lang.Object

org.armedbear.lisp.util.RandomAccessCharacterFile

public class RandomAccessCharacterFile
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	RandomAccessCharacterFile.RandomAccessInputStream
private class	RandomAccessCharacterFile.RandomAccessOutputStream
private class	RandomAccessCharacterFile.RandomAccessReader
private class	RandomAccessCharacterFile.RandomAccessWriter

Field Summary

Fields

Modifier and Type	Field and Description
private ByteBuffer	bbuf bbuf is treated as a cache of the file content.
private boolean	bbufIsDirty
private boolean	bbufIsReadable
private long	bbufpos
(package private) static int	BUFSIZ
private CharsetDecoder	cdec
private CharsetEncoder	cenc
private Charset	cset
private FileChannel	fcn
private RandomAccessCharacterFile.RandomAccessInputStream	inputStream
private RandomAccessCharacterFile.RandomAccessOutputStream	outputStream
private RandomAccessCharacterFile.RandomAccessReader	reader
private ByteBuffer	shortByteBuf
private CharBuffer	singleCharBuf
(package private) static Reader	staticReader
private RandomAccessCharacterFile.RandomAccessWriter	writer

Constructor Summary

Constructors

Constructor and Description
RandomAccessCharacterFile(RandomAccessFile raf, String encoding)

Method Summary

Modifier and Type	Method and Description
void	close()
private void	encodeAndWrite(CharBuffer cbuf, boolean flush, boolean endOfFile)
private boolean	ensureReadBbuf(boolean force)
void	flush()
private void	flushBbuf(boolean commitOnly)
PushbackInputStream	getInputStream()
OutputStream	getOutputStream()
PushbackReader	getReader()
Writer	getWriter()
private void	internalFlush(boolean endOfFile)
long	length()
long	position()
void	position(long newPosition)
int	read(byte[] b, int off, int len)
(package private) int	read(char[] cb, int off, int len)
void	setEncoding(String encoding)
void	unreadByte(byte b)
void	unreadChar(char c)
(package private) void	write(byte[] b, int off, int len)
(package private) void	write(char[] cb, int off, int len)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

staticReader

static Reader staticReader

BUFSIZ

static final int BUFSIZ

See Also:

Constant Field Values

writer

private RandomAccessCharacterFile.RandomAccessWriter writer

reader

private RandomAccessCharacterFile.RandomAccessReader reader

inputStream

private RandomAccessCharacterFile.RandomAccessInputStream inputStream

outputStream

private RandomAccessCharacterFile.RandomAccessOutputStream outputStream

fcn

private FileChannel fcn

cset

private Charset cset

cenc

private CharsetEncoder cenc

cdec

private CharsetDecoder cdec

bbuf

private ByteBuffer bbuf

bbuf is treated as a cache of the file content. If it points to somewhere in the middle of the file, it holds the copy of the file content, even when you are writing a large chunk of data. If you write in the middle of a file, bbuf first gets filled with contents of the data, and only after that any new data is written on bbuf. The exception is when you are appending data at the end of the file.

bbufIsDirty

private boolean bbufIsDirty

bbufIsReadable

private boolean bbufIsReadable

bbufpos

private long bbufpos

singleCharBuf

private CharBuffer singleCharBuf

shortByteBuf

private ByteBuffer shortByteBuf

Constructor Detail

RandomAccessCharacterFile

public RandomAccessCharacterFile(RandomAccessFile raf,
                                 String encoding)
                          throws IOException

Throws:

IOException

Method Detail

setEncoding

public void setEncoding(String encoding)

getWriter

public Writer getWriter()

getReader

public PushbackReader getReader()

getInputStream

public PushbackInputStream getInputStream()

getOutputStream

public OutputStream getOutputStream()

close

public final void close()
                 throws IOException

Throws:

IOException

flush

public final void flush()
                 throws IOException

Throws:

IOException

ensureReadBbuf

private final boolean ensureReadBbuf(boolean force)
                              throws IOException

Throws:

IOException

read

final int read(char[] cb,
               int off,
               int len)
        throws IOException

Throws:

IOException

write

final void write(char[] cb,
                 int off,
                 int len)
          throws IOException

Throws:

IOException

internalFlush

private final void internalFlush(boolean endOfFile)
                          throws IOException

Throws:

IOException

encodeAndWrite

private final void encodeAndWrite(CharBuffer cbuf,
                                  boolean flush,
                                  boolean endOfFile)
                           throws IOException

Throws:

IOException

position

public final void position(long newPosition)
                    throws IOException

Throws:

IOException

position

public final long position()
                    throws IOException

Throws:

IOException

length

public final long length()
                  throws IOException

Throws:

IOException

flushBbuf

private final void flushBbuf(boolean commitOnly)
                      throws IOException

Throws:

IOException

read

public final int read(byte[] b,
                      int off,
                      int len)
               throws IOException

Throws:

IOException

unreadChar

public final void unreadChar(char c)
                      throws IOException

Throws:

IOException

unreadByte

public final void unreadByte(byte b)
                      throws IOException

Throws:

IOException

write

final void write(byte[] b,
                 int off,
                 int len)
          throws IOException

Throws:

IOException