Package org.apache.poi.poifs.nio

Class DataSource

java.lang.Object

org.apache.poi.poifs.nio.DataSource

Direct Known Subclasses:

ByteArrayBackedDataSource, FileBackedDataSource

public abstract class DataSource
extends Object

Common definition of how we read and write bytes

Constructor Summary

Constructors

Constructor	Description
DataSource()

Method Summary

Modifier and Type	Method	Description
abstract void	close()	Close the underlying stream
abstract void	copyTo(OutputStream stream)	Copies the contents to the specified OutputStream
abstract ByteBuffer	read(int length, long position)
abstract long	size()
abstract void	write(ByteBuffer src, long position)

Methods inherited from class java.lang.Object

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

Constructor Detail

DataSource

public DataSource()

Method Detail

read

public abstract ByteBuffer read(int length,
                                long position)
                         throws IOException

Throws:

IOException

write

public abstract void write(ByteBuffer src,
                           long position)
                    throws IOException

Throws:

IOException

size

public abstract long size()
                   throws IOException

Throws:

IOException

close

public abstract void close()
                    throws IOException

Close the underlying stream

Throws:

IOException

copyTo

public abstract void copyTo(OutputStream stream)
                     throws IOException

Copies the contents to the specified OutputStream

Throws:

IOException