org.cdlib.xtf.saxonExt.pipe

Class BufferedRandomAccessFile

Object

RandomAccessFileOrArray

BufferedRandomAccessFile

All Implemented Interfaces:

DataInput

class BufferedRandomAccessFile
extends RandomAccessFileOrArray

Class to provide buffered, random access to a PDF file. Useful for when we can't realistically fit a PDF file into memory.

Author:

Martin Haye

Field Summary

Fields

Modifier and Type	Field and Description
(package private) RandomAccessFile	baseFile
(package private) byte[]	buffer
(package private) int	BUFFER_SIZE
(package private) int	bufferFilePointer
(package private) int	bufferLength
(package private) int	bufferPos
(package private) String	filename
(package private) boolean	havePrevByte
(package private) byte	prevByte
(package private) int	startOffset

Constructor Summary

Constructors

Constructor and Description
BufferedRandomAccessFile(String filename)

Method Summary

Modifier and Type	Method and Description
void	close()
private void	fillBuffer() Fill our buffer with data at the current file pointer.
int	getFilePointer()
ByteBuffer	getNioByteBuffer()
int	getStartOffset()
protected void	insureOpen()
boolean	isOpen()
int	length()
void	pushBack(byte b)
int	read()
int	read(byte[] b, int off, int len)
void	reOpen()
void	seek(int pos)
void	seek(long pos)
void	setStartOffset(int off)
int	skipBytes(int n)

Methods inherited from class RandomAccessFileOrArray

InputStreamToArray, read, readBoolean, readByte, readChar, readCharLE, readDouble, readDoubleLE, readFloat, readFloatLE, readFully, readFully, readInt, readIntLE, readLine, readLong, readLongLE, readShort, readShortLE, readUnsignedByte, readUnsignedInt, readUnsignedIntLE, readUnsignedShort, readUnsignedShortLE, readUTF, skip

Methods inherited from class Object

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

Field Detail

baseFile

RandomAccessFile baseFile

prevByte

byte prevByte

havePrevByte

boolean havePrevByte

BUFFER_SIZE

final int BUFFER_SIZE

See Also:

Constant Field Values

buffer

byte[] buffer

startOffset

int startOffset

bufferLength

int bufferLength

bufferPos

int bufferPos

bufferFilePointer

int bufferFilePointer

filename

String filename

Constructor Detail

BufferedRandomAccessFile

public BufferedRandomAccessFile(String filename)
                         throws IOException

Throws:

IOException

Method Detail

pushBack

public void pushBack(byte b)

Overrides:

pushBack in class RandomAccessFileOrArray

fillBuffer

private void fillBuffer()
                 throws IOException

Fill our buffer with data at the current file pointer.

Throws:

IOException

read

public int read()
         throws IOException

Overrides:

read in class RandomAccessFileOrArray

Throws:

IOException

read

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

Overrides:

read in class RandomAccessFileOrArray

Throws:

IOException

skipBytes

public int skipBytes(int n)
              throws IOException

Specified by:

skipBytes in interface DataInput

Overrides:

skipBytes in class RandomAccessFileOrArray

Throws:

IOException

reOpen

public void reOpen()
            throws IOException

Overrides:

reOpen in class RandomAccessFileOrArray

Throws:

IOException

insureOpen

protected void insureOpen()
                   throws IOException

Overrides:

insureOpen in class RandomAccessFileOrArray

Throws:

IOException

isOpen

public boolean isOpen()

Overrides:

isOpen in class RandomAccessFileOrArray

close

public void close()
           throws IOException

Overrides:

close in class RandomAccessFileOrArray

Throws:

IOException

setStartOffset

public void setStartOffset(int off)

Overrides:

setStartOffset in class RandomAccessFileOrArray

getStartOffset

public int getStartOffset()

Overrides:

getStartOffset in class RandomAccessFileOrArray

length

public int length()
           throws IOException

Overrides:

length in class RandomAccessFileOrArray

Throws:

IOException

seek

public void seek(int pos)
          throws IOException

Overrides:

seek in class RandomAccessFileOrArray

Throws:

IOException

seek

public void seek(long pos)
          throws IOException

Overrides:

seek in class RandomAccessFileOrArray

Throws:

IOException

getFilePointer

public int getFilePointer()
                   throws IOException

Overrides:

getFilePointer in class RandomAccessFileOrArray

Throws:

IOException

getNioByteBuffer

public ByteBuffer getNioByteBuffer()
                            throws IOException

Overrides:

getNioByteBuffer in class RandomAccessFileOrArray

Throws:

IOException