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org.apache.poi.poifs.nio
Class FileBackedDataSource

java.lang.Object
  extended by org.apache.poi.poifs.nio.DataSource
      extended by org.apache.poi.poifs.nio.FileBackedDataSource

public class FileBackedDataSource
extends DataSource

A POIFS DataSource backed by a File

Constructor Summary
FileBackedDataSource(java.io.File file)
           
FileBackedDataSource(java.io.File file, boolean readOnly)
           
FileBackedDataSource(java.nio.channels.FileChannel channel, boolean readOnly)
           
FileBackedDataSource(java.io.RandomAccessFile srcFile, boolean readOnly)
           
 
Method Summary
 void close()
          Close the underlying stream
 void copyTo(java.io.OutputStream stream)
          Copies the contents to the specified OutputStream
 java.nio.channels.FileChannel getChannel()
           
 boolean isWriteable()
           
 java.nio.ByteBuffer read(int length, long position)
           
 long size()
           
 void write(java.nio.ByteBuffer src, long position)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FileBackedDataSource

public FileBackedDataSource(java.io.File file)
                     throws java.io.FileNotFoundException
Throws:
java.io.FileNotFoundException

FileBackedDataSource

public FileBackedDataSource(java.io.File file,
                            boolean readOnly)
                     throws java.io.FileNotFoundException
Throws:
java.io.FileNotFoundException

FileBackedDataSource

public FileBackedDataSource(java.io.RandomAccessFile srcFile,
                            boolean readOnly)

FileBackedDataSource

public FileBackedDataSource(java.nio.channels.FileChannel channel,
                            boolean readOnly)
Method Detail

isWriteable

public boolean isWriteable()

getChannel

public java.nio.channels.FileChannel getChannel()

read

public java.nio.ByteBuffer read(int length,
                                long position)
                         throws java.io.IOException
Specified by:
read in class DataSource
Throws:
java.io.IOException

write

public void write(java.nio.ByteBuffer src,
                  long position)
           throws java.io.IOException
Specified by:
write in class DataSource
Throws:
java.io.IOException

copyTo

public void copyTo(java.io.OutputStream stream)
            throws java.io.IOException
Description copied from class: DataSource
Copies the contents to the specified OutputStream

Specified by:
copyTo in class DataSource
Throws:
java.io.IOException

size

public long size()
          throws java.io.IOException
Specified by:
size in class DataSource
Throws:
java.io.IOException

close

public void close()
           throws java.io.IOException
Description copied from class: DataSource
Close the underlying stream

Specified by:
close in class DataSource
Throws:
java.io.IOException
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