Package com.e1c.g5.v8.fastzip

package com.e1c.g5.v8.fastzip

This package provides support for FastZIP archive format.

A FastZIP file consists of a number of chunks and a descriptor.

Chunks are linked to a few disjoint chains. Chunks of each chain have the same size. Each chain is a compressed sequence of bytes provided by entries. Zstandard algorithm is used for compression.

Information about each chain contains in the descriptor. A chain is described by

• Chunk size,
• Array of offsets from the start of the file to the start of each chunk,
• Array of entry descriptors, where an entry is described by
  • Size,
  • Offset in the chain,
  • Arbitrary metadata,
  • Checksum.

The descriptor itself is compressed with GZIP.

Each chain of a FastZIP archive can be processed independently during both compression and decompression. This enables efficient parallel processing.

Unlike ZIP, FastZIP does not enable arbitrary entry access.

Related Packages

Package	Description
com.e1c.g5.v8.fastzip.entry

Class	Description
FzipException	FastZIP format exception.
FzipExceptionsTest	As exception handling in the parallel implementation is tricky, we test that IOExceptions and RuntimeExceptions thrown while reading or writing an entry are preserved.
FzipExceptionsTest.TestIoException
FzipExceptionsTest.TestRuntimeException
FzipIOFactory	A factory for obtaining FastZIP readers and writers with specific properties.
FzipIoTest	Tests for FastZIP reader and writer.
FzipIoTest.MultiReadEntryRegistry
FzipSetupTest	Tests argument constraints of FzipIOFactory.
IFzipReader	FastZIP archive reader.
IFzipWriter	FastZIP archive writer.
IProgressListener	Compression and decompression progress listener.
StaticEntry	Testing FastZIP entry.
StaticEntryRegistry	Testing entry registry which manages a fixed set of FastZIP entries.