A Java port of Google's open-vcdiff vcdiff (RFC3284) implementation. It's currently synced with open-vcdiff 0.8.4.
Maven:
<dependency>
<groupId>com.davidehrmann.vcdiff</groupId>
<artifactId>vcdiff-core</artifactId>
<version>0.1.1</version>
</dependency>Gradle:
compile 'com.davidehrmann.vcdiff:vcdiff-core:0.1.1'
byte[] dictionary = ...;
byte[] uncompressedData = ...;
OutputStream compressedData = ...;
// OutputStream (like GZIPOutputStream) and stream-based encoders are
// also available from the builder.
VCDiffEncoder<OutputStream> encoder = VCDiffEncoderBuilder.builder()
.withDictionary(dictionary)
.buildSimple();
encoder.encode(uncompressedData, compressedData);byte[] dictionary = ...;
byte[] compressedData = ...;
OutputStream uncompressedData = ...;
// InputStream (like GZIPInputStream) and stream-based decoders are
// also available from the builder.
VCDiffDecoder decoder = VCDiffDecoderBuilder.builder().buildSimple();
decoder.decode(dictionary, compressedData, uncompressedData);The command line wrapper for java-vcdiff is generally compatble with the open-vcdiff implementation:
# Compress original with dictionary dict to compressed.vcdiff
java com.davidehrmann.vcdiff.VCDiffFileBasedCoder encode -dictionary dict -delta compressed.vcdiff -target original
# Decompress compressed.vcdiff with dictionary dict to decompressed
java com.davidehrmann.vcdiff.VCDiffFileBasedCoder decode -dictionary dict -delta compressed.vcdiff -target decompressed
# Usage details
java com.davidehrmann.vcdiff.VCDiffFileBasedCoder helpThe command line tool is available in the Central Repository
Maven:
<dependency>
<groupId>com.davidehrmann.vcdiff</groupId>
<artifactId>vcdiff-cli</artifactId>
<version>0.1.1</version>
</dependency>Gradle:
compile 'com.davidehrmann.vcdiff:vcdiff-cli:0.1.1'
xdelta3 has extensions that aren't currently supported by vcdiff-java: the application header, adler32 checksum,
and secondary compression. When encoding, passing -S -A -n to xdelta3 will disable these features.