at.gv.egiz.pdfas.impl.input
Class FileBasedPdfDataSourceImpl

java.lang.Object
  at.gv.egiz.pdfas.impl.input.FileBasedPdfDataSourceImpl

All Implemented Interfaces:

DataSource, FileBased, PdfDataSource

public class FileBasedPdfDataSourceImpl

extends Object

implements PdfDataSource, FileBased

Author:

wprinz

Field Summary

protected File	inputFile The underlying file.
protected int	length

Constructor Summary

FileBasedPdfDataSourceImpl(File file, int length)
Constructor that creates this PdfDataSource backed by a file in the file system.

Method Summary

protected InputStream	createFileInputStream()
InputStream	createInputStream() Creates a new InputStream that allows to read out the document's binary data from the beginning.
byte[]	getAsByteArray() Returns the data of this DataSource as a byte array.
File	getFile() Returns the underlying data file.
int	getLength() Returns the length (number of bytes) of the stream.

Methods inherited from class java.lang.Object

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

Field Detail

inputFile

protected File inputFile

The underlying file.

length

protected int length

Constructor Detail

FileBasedPdfDataSourceImpl

public FileBasedPdfDataSourceImpl(File file,
                                  int length)
                           throws IOException

Constructor that creates this PdfDataSource backed by a file in the file system.

Parameters:

file - The input File.

length - The length of the InputStream. The is the maximum number of bytes that can be read from the stream.

Throws:

IOException - Thrown if the file cannot be read properly.

Method Detail

getFile

public File getFile()

Description copied from interface: FileBased

Returns the underlying data file.

Specified by:

getFile in interface FileBased

Returns:

Returns the underlying data file.

See Also:

FileBased.getFile()

createInputStream

public InputStream createInputStream()

Description copied from interface: DataSource

Creates a new InputStream that allows to read out the document's binary data from the beginning.

Specified by:

createInputStream in interface DataSource

Returns:

Returns the InputStream with the binary data.

See Also:

DataSource.createInputStream()

createFileInputStream

protected InputStream createFileInputStream()

getLength

public int getLength()

Description copied from interface: DataSource

Returns the length (number of bytes) of the stream.

Specified by:

getLength in interface DataSource

Returns:

Returns the length (number of bytes) of the stream.

See Also:

DataSource.getLength()

getAsByteArray

public byte[] getAsByteArray()

Description copied from interface: DataSource

Returns the data of this DataSource as a byte array.

Calling this method indicates that you need a byte array for random read access. The DataSource implementation should of course cache this byte array to avoid too much memory usage.

Performance analysis has shown that the libraries internally convert the streams to byte arrays and that file system access is very slow.

Specified by:

getAsByteArray in interface DataSource

Returns:

See Also:

DataSource.getAsByteArray()