TrueZIP API
Version 6.8.1

TrueZIP is a Java based Virtual File System (VFS) to enable transparent, multi-threaded read/write access to archive files (ZIP, TAR, etc) as if they were directories.

See:
Description

High Level API For Accessing Archive Files

de.schlichtherle.io	Provides transparent, multi-threaded read/write access to archive files (ZIP, TAR, etc) and their entries as if they were (virtual) directories and files.
de.schlichtherle.io.samples	Provides sample main classes for various archive file operation utilities (zip, unzip, encrypt, decrypt etc.).

GUI For Accessing Archive Files

de.schlichtherle.awt	Provides custom AWT GUI classes.
de.schlichtherle.io.swing	Provides random read only access to files (as opposed to the random read/write access provided by RandomAccessFile).
de.schlichtherle.io.swing.tree	Support classes for the package de.schlichtherle.io.swing.
de.schlichtherle.swing	Provides custom Swing GUI classes.
de.schlichtherle.swing.event	Support classes for the package de.schlichtherle.io.swing.

Low Level API For Accessing ZIP Files

de.schlichtherle.util.zip

A drop-in replacement for the classes in the package java.util.zip which read and write ZIP files.

Low Level API For Accessing RAES Files

de.schlichtherle.crypto.io.raes	Reads and writes files according to the Random Access Encryption Specification (RAES).
de.schlichtherle.key	An extensible, generalized manager for keys of arbitrary type required to create or open protected resources.
de.schlichtherle.key.passwd.console	The console I/O based implementation of the abstract base class KeyManager.
de.schlichtherle.key.passwd.swing	The Swing GUI based implementation of the abstract base class KeyManager.

SPI With Implementations For Pluggable Archive Drivers

de.schlichtherle.io.archive	Essential classes required to work with archive files.
de.schlichtherle.io.archive.spi	The Service Provider Interface (SPI) for pluggable ArchiveDrivers.
de.schlichtherle.io.archive.tar	Provides the ArchiveDriver family for TAR files.
de.schlichtherle.io.archive.zip	Provides the ArchiveDriver family for ZIP files.
de.schlichtherle.io.archive.zip.raes	Provides the ArchiveDriver family for RAES encrypted ZIP files.

Other Packages

de.schlichtherle.crypto	Provides utility classes for general cryptograpic purposes.
de.schlichtherle.crypto.generators	Provides Pseudo Random Number Generators (PRNG).
de.schlichtherle.crypto.io	Provides utility classes for encryption and decryption.
de.schlichtherle.crypto.modes	Provides block cipher modes.
de.schlichtherle.io.rof	Provides random read only access to files (as opposed to the random read/write access provided by RandomAccessFile).
de.schlichtherle.io.util	Provides utility classes for I/O.
de.schlichtherle.nio.charset	Provides an implementation of the IBM437 character set.
de.schlichtherle.nio.charset.spi	Provides a CharsetProvider which solely provides the IBM437 character set.
de.schlichtherle.util	General utility classes.
de.schlichtherle.util.regex	Provides regular expression services as an amendment to the JSE 5 API.

TrueZIP is a Java based Virtual File System (VFS) to enable transparent, multi-threaded read/write access to archive files (ZIP, TAR, etc) as if they were directories. Archive files may be arbitrarily nested and the nesting level is only limited by heap and file system size.

TrueZIP's design strategy is to "make simple things easy and complex things possible". For example, when using the default configuration, the instance new File("app.ear/web.war/WEB-INF/lib/lib.jar/META-INF/MANIFEST.MF") would refer to the text file entry META-INF/MANIFEST.MF within the JAR file entry WEB-INF/lib/lib.jar within the WAR file entry web.war within the EAR file app.ear. The same applies for any other supported and configured archive type.

Limitation: TrueZIP works on files only. If an archive is just available as an InputStream, it needs to be saved to a (temporary) file first. If this is not an option, TrueZIP can't be used.

TrueZIP provides a pluggable archive driver architecture to support virtually any archive type: Out of the box, TrueZIP supports ZIP, SFX/EXE, JAR, TZP, TAR, TAR.BZ2 and TAR.GZ. This list will be extended in future releases. Note that some of these archive types require additional JARs on the runtime class path.

To be minimal intrusive, TrueZIP provides drop-in replacements for many classes in the java.io package. This reduces the learning curve to the essential minimum and allows to introduce TrueZIP's functionality gradually within legacy applications or even other VFS solutions which are currently built on top of java.io.File*.

TrueZIP 6 requires only a J2SE 1.4.2 compatible Java Runtime Environment, but some rarely used features (e.g. prompting for a password on the console) are available only when running under JSE 6.

TrueZIP is covered under the Apache License, Version 2.0.

Default Configuration

The following archive types and access parameters are defined by the default configuration resource file in truezip.jar/META-INF/services/de.schlichtherle.io.registry.properties. Note that only the archive file suffixes "ear|jar|war|zip" are recognized in file paths by default.

Type	Canonical Suffixes0	DEFAULT1	ALL2	Charset3	Dependencies4	Description
ZIP	zip	Yes	Yes	IBM4375		ZIP file: Archive file with central directory and compressible entries
JAR	ear|jar|war	Yes	Yes	UTF-8		Java Archive: ZIP with custom directory tree layout
ODF	odb|odf|odg|odm|odp|ods|odt|otg|oth|otp|ots|ott	No	Yes	UTF-8		OpenDocument Format: If present, the mimetype entry is written first with STORED method.
TZP	tzp|zip.rae|zip.raes	No	Yes	UTF-8	lcrypto.jar6	RAES encrypted ZIP file.
SFX/EXE	exe	No	Yes	system specific		ZIP file with a code preamble for self extraction. This driver is pretty slow.
TAR	tar	No	Yes	US-ASCII7	ant.jar8	TAR: Uncompressed tape archive file.
TAR.BZ2	tbz2|tar.bz2	No	Yes	US-ASCII7	ant.jar8	TAR file wrapped in BZIP2 compression format.
TAR.GZ	tar.gz|tgz	No	Yes	US-ASCII7	ant.jar8	TAR file wrapped in GZIP compression format.

⁰ Suffix recognition is case insensitive with the DefaultArchiveDetector class.
¹ Recognized by the predefined instance ArchiveDetector.DEFAULT? Note that this may be extended (but not restricted) in future releases.
² Recognized by the predefined instance ArchiveDetector.ALL? Note that this may be extended (but not restricted) in future releases.
³ The code page to use for entry names and other entry meta data. This access parameter is determined by the archive driver (not the archive detector) and can be customized by subclassing it.
⁴ This needs to be on the runtime class path.
⁵ The charset for ZIP files is not specified. This is a heuristic value which is based on the fact that IBM437 is the original PC character set for the USA and the ZIP file format has been invented there. Do not rely on this!
⁶ Bouncy Castle's Lightweight Crypto API for JDK 1.4, version 1.45 or higher. Available at http://www.bouncycastle.org/latest_releases.html.
⁷ The charset for TAR files is not specified. This is a heuristic value which is based on the fact that the TAR file format stems from UNIX implementations of the seventies.
⁸ Apache's Ant, version 1.8.1 or higher. Available at http://ant.apache.org.