Bzip2Archive

Inheritance: java.lang.Object, com.aspose.zip.ILicenseStateProvider

All Implemented Interfaces: com.aspose.zip.IArchive, java.lang.AutoCloseable

public class Bzip2Archive extends ILicenseStateProvider implements IArchive, AutoCloseable

This class represents bzip2 archive file. Use it to compose or extract bzip2 archives.

bzip2 compresses files using the Burrows-Wheeler block sorting text compression algorithm, and Huffman coding. See more: Bzip2

Constructors

Constructor	Description
Bzip2Archive()	Initializes a new instance of the Bzip2Archive class prepared for compressing.
Bzip2Archive(InputStream sourceStream)	Initializes a new instance of the Bzip2Archive class prepared for decompressing.
Bzip2Archive(String path)	Initializes a new instance of the Bzip2Archive class prepared for decompressing.

Methods

Method	Description
close()	{@inheritDoc}
dispose()	Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
extract(OutputStream destination)	Extracts the archive to the stream provided.
extract(String path)	Extracts the archive to the file by path.
extractToDirectory(String destinationDirectory)	Extracts content of the archive to the directory provided.
getFileEntries()	Gets entries of IArchiveFileEntry type constituting the bzip2 archive.
open()	Opens the archive for extraction and provides a stream with archive content.
save(OutputStream outputStream)	Saves archive to the stream provided.
save(OutputStream outputStream, Bzip2SaveOptions saveOptions)	Saves archive to the stream provided.
save(String destinationFileName)	Saves archive to destination file provided.
save(String destinationFileName, Bzip2SaveOptions saveOptions)	Saves archive to destination file provided.
setSource(CpioArchive cpioArchive)	Sets the content to be compressed within the archive.
setSource(CpioArchive cpioArchive, CpioFormat format)	Sets the content to be compressed within the archive.
setSource(TarArchive tarArchive)	Sets the content to be compressed within the archive.
setSource(TarArchive tarArchive, TarFormat format)	Sets the content to be compressed within the archive.
setSource(File file)	Sets the content to be compressed within the archive.
setSource(InputStream source)	Sets the content to be compressed within the archive.
setSource(String path)	Sets the content to be compressed within the archive.

Bzip2Archive()

public Bzip2Archive()

Initializes a new instance of the Bzip2Archive class prepared for compressing.

The following example shows how to compress a file.

     try (Bzip2Archive archive = new Bzip2Archive()) {
         archive.setSource("data.bin");
         archive.save("archive.bz2");
     }
 

Bzip2Archive(InputStream sourceStream)

public Bzip2Archive(InputStream sourceStream)

Initializes a new instance of the Bzip2Archive class prepared for decompressing.

Open an archive from a stream and extract it to a ByteArrayOutputStream

     ByteArrayOutputStream ms = new ByteArrayOutputStream();
     try (Bzip2Archive archive = new Bzip2Archive(new FileInputStream("archive.bz2"))) {
         InputStream decompressed = archive.open();
         byte[] b = new byte[8192];
         int bytesRead;
         while (0 < (bytesRead = decompressed.read(b, 0, b.length))) {
             ms.write(b, 0, bytesRead);
         }
     } catch (IOException ex) {
         System.out.println(ex);
     }
 

This constructor does not decompress. See open() method for decompressing.

Parameters:

Parameter	Type	Description
sourceStream	java.io.InputStream	the source of the archive

Bzip2Archive(String path)

public Bzip2Archive(String path)

Initializes a new instance of the Bzip2Archive class prepared for decompressing.

Open an archive from file by path and extract it to a MemoryStream

     ByteArrayOutputStream ms = new ByteArrayOutputStream();
     try (Bzip2Archive archive = new Bzip2Archive("archive.bz2")) {
         InputStream decompressed = archive.open();
         byte[] b = new byte[8192];
         int bytesRead;
         while (0 < (bytesRead = decompressed.read(b, 0, b.length))) {
             ms.write(b, 0, bytesRead);
         }
     } catch (IOException ex) {
         System.out.println(ex);
     }
 

This constructor does not decompress. See open() method for decompressing.

Parameters:

Parameter	Type	Description
path	java.lang.String	the path to the archive file

close()

public void close()

dispose()

public final void dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

extract(OutputStream destination)

public final void extract(OutputStream destination)

Extracts the archive to the stream provided.

     try (Bzip2Archive archive = new Bzip2Archive("archive.bz2")) {
         archive.extract(httpResponseStream);
     }
 

Parameters:

Parameter	Type	Description
destination	java.io.OutputStream	destination stream. Must be writable

extract(String path)

public final File extract(String path)

Extracts the archive to the file by path.

Parameters:

Parameter	Type	Description
path	java.lang.String	the path to destination file. If the file already exists, it will be overwritten

Returns: java.io.File - Info of extracted file.

extractToDirectory(String destinationDirectory)

public final void extractToDirectory(String destinationDirectory)

Extracts content of the archive to the directory provided.

Parameters:

Parameter	Type	Description
destinationDirectory	java.lang.String	The path to the directory to place the extracted files in.

If the directory does not exist, it will be created. |

getFileEntries()

public final Iterable<IArchiveFileEntry> getFileEntries()

Gets entries of IArchiveFileEntry type constituting the bzip2 archive.

Returns: java.lang.Iterable<com.aspose.zip.IArchiveFileEntry> - entries of IArchiveFileEntry type constituting the bzip2 archive

open()

public final InputStream open()

Opens the archive for extraction and provides a stream with archive content.

Usage:

     try (InputStream decompressed = archive.open()) {
         byte[] buffer = new byte[8192];
         int bytesRead;
         while (0 < (bytesRead = decompressed.read(buffer, 0, buffer.length))) {
             fileStream.write(buffer, 0, bytesRead);
         }
     } catch (IOException ex) {
         System.out.println(ex);
     }
 

Read from the stream to get original content of file. See examples section.

Returns: java.io.InputStream - the stream that represents the contents of the archive

save(OutputStream outputStream)

public final void save(OutputStream outputStream)

Saves archive to the stream provided.

Writes compressed data to an output stream.

     try (Bzip2Archive archive = new Bzip2Archive()) {
         archive.setSource(new File("data.bin"));
         archive.save(outputStream);
     }
 

Parameters:

Parameter	Type	Description
outputStream	java.io.OutputStream	destination stream.

outputStream must be writable |

save(OutputStream outputStream, Bzip2SaveOptions saveOptions)

public final void save(OutputStream outputStream, Bzip2SaveOptions saveOptions)

Saves archive to the stream provided.

Writes compressed data to an output stream.

     try (Bzip2Archive archive = new Bzip2Archive()) {
         archive.setSource(new File("data.bin"));
         archive.save(outputStream);
     }
 

Parameters:

Parameter	Type	Description
outputStream	java.io.OutputStream	destination stream.

outputStream must be writable | | saveOptions | Bzip2SaveOptions | options for saving a bzip2 archive. If not specified, 900 Kb block size would be used |

save(String destinationFileName)

public final void save(String destinationFileName)

Saves archive to destination file provided.

Writes compressed data to file.

     try (Bzip2Archive archive = new Bzip2Archive()) {
         archive.setSource(new File("data.bin"));
         archive.save("data.bz2");
     }
 

Parameters:

Parameter	Type	Description
destinationFileName	java.lang.String	the path of the archive to be created. If the specified file name points to an existing file, it will be overwritten

save(String destinationFileName, Bzip2SaveOptions saveOptions)

public final void save(String destinationFileName, Bzip2SaveOptions saveOptions)

Saves archive to destination file provided.

Writes compressed data to file.

     try (Bzip2Archive archive = new Bzip2Archive()) {
         archive.setSource(new File("data.bin"));
         archive.save("data.bz2");
     }
 

Parameters:

Parameter	Type	Description
destinationFileName	java.lang.String	the path of the archive to be created. If the specified file name points to an existing file, it will be overwritten
saveOptions	Bzip2SaveOptions	options for saving a bzip2 archive. If not specified, 900 Kb block size would be used

setSource(CpioArchive cpioArchive)

public final void setSource(CpioArchive cpioArchive)

Sets the content to be compressed within the archive.

     try (CpioArchive cpioArchive = new CpioArchive()) {
         cpioArchive.createEntry("first.bin", "data1.bin");
         cpioArchive.createEntry("second.bin", "data2.bin");
         try (Bzip2Archive bzippedArchive = new Bzip2Archive()) {
             bzippedArchive.setSource(cpioArchive);
             bzippedArchive.save("archive.cpio.bz2");
         }
     }
 

Use this method to compose joint cpio.bz2 archive.

Parameters:

Parameter	Type	Description
cpioArchive	CpioArchive	cpio archive to be compressed

setSource(CpioArchive cpioArchive, CpioFormat format)

public final void setSource(CpioArchive cpioArchive, CpioFormat format)

Sets the content to be compressed within the archive.

     try (CpioArchive cpioArchive = new CpioArchive()) {
         cpioArchive.createEntry("first.bin", "data1.bin");
         cpioArchive.createEntry("second.bin", "data2.bin");
         try (Bzip2Archive bzippedArchive = new Bzip2Archive()) {
             bzippedArchive.setSource(cpioArchive);
             bzippedArchive.save("archive.cpio.bz2");
         }
     }
 

Use this method to compose joint cpio.bz2 archive.

Parameters:

Parameter	Type	Description
cpioArchive	CpioArchive	cpio archive to be compressed
format	CpioFormat	defines cpio header format

setSource(TarArchive tarArchive)

public final void setSource(TarArchive tarArchive)

Sets the content to be compressed within the archive.

     try (TarArchive tarArchive = new TarArchive()) {
         tarArchive.createEntry("first.bin", "data1.bin");
         tarArchive.createEntry("second.bin", "data2.bin");
         try (Bzip2Archive bzippedArchive = new Bzip2Archive()) {
             bzippedArchive.setSource(tarArchive);
             bzippedArchive.save("archive.tar.bz2");
         }
     }
 

Use this method to compose joint tar.bz2 archive.

Parameters:

Parameter	Type	Description
tarArchive	TarArchive	tar archive to be compressed

setSource(TarArchive tarArchive, TarFormat format)

public final void setSource(TarArchive tarArchive, TarFormat format)

Sets the content to be compressed within the archive.

     try (TarArchive tarArchive = new TarArchive()) {
         tarArchive.createEntry("first.bin", "data1.bin");
         tarArchive.createEntry("second.bin", "data2.bin");
         try (Bzip2Archive bzippedArchive = new Bzip2Archive()) {
             bzippedArchive.setSource(tarArchive);
             bzippedArchive.save("archive.tar.bz2");
         }
     }
 

Use this method to compose joint tar.bz2 archive.

Parameters:

Parameter	Type	Description
tarArchive	TarArchive	tar archive to be compressed
format	TarFormat	defines tar header format

setSource(File file)

public final void setSource(File file)

Sets the content to be compressed within the archive.

     try (Bzip2Archive archive = new Bzip2Archive()) {
         archive.setSource(new File("data.bin"));
         archive.save("archive.bz2");
     }
 

Parameters:

Parameter	Type	Description
file	java.io.File	the reference to a file to be compressed

setSource(InputStream source)

public final void setSource(InputStream source)

Sets the content to be compressed within the archive.

     try (Bzip2Archive archive = new Bzip2Archive()) {
         archive.setSource(new ByteArrayInputStream(new byte[] { 0x00, (byte) 0xFF }));
         archive.save("archive.bz2");
     }
 

Parameters:

Parameter	Type	Description
source	java.io.InputStream	the input stream for the archive

setSource(String path)

public final void setSource(String path)

Sets the content to be compressed within the archive.

     try (Bzip2Archive archive = new Bzip2Archive()) {
         archive.setSource("data.bin");
         archive.save("archive.bz2");
     }
 

Parameters:

Parameter	Type	Description
path	java.lang.String	path to file to be compressed