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If you want to use JWAT from any build environment that supports artifacts, the following can be used.

  <dependencies>
    <dependency>
      <groupId>org.jwat</groupId>
      <artifactId>jwat-common</artifactId>
      <version>0<version>1.90.1<4</version>
    </dependency>

    <dependency>
      <groupId>org.jwat</groupId>
      <artifactId>jwat-gzip</artifactId>
      <version>0<version>1.90.1<4</version>
    </dependency>

    <dependency>
      <groupId>org.jwat</groupId>
      <artifactId>jwat-arc</artifactId>
      <version>0<version>1.90.1<4</version>
    </dependency>

    <dependency>
      <groupId>org.jwat</groupId>
      <artifactId>jwat-warc</artifactId>
      <version>1.0.4</version>
    </dependency>

      <version>0.9.1<<dependency>
      <groupId>org.jwat</groupId>
      <artifactId>jwat-archive-common</artifactId>
      <version>1.0.4</version>
    </dependency>
  </dependencies>

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The ARC/WARC factory and reader methods support both compressed and uncompressed files in varying combinations.
Basically you can create a reader for compressed or uncompressed files, but the factory also includes an auto-detection mechanism which can determine the correct reader on a per file basis.

Writing compressed ARC/WARC files is also possible though the use of different methods in the writer factories.

GZip compression is only supported on ARC/WARC files where each record is compressed individually and concatenated into one file and not the case where the whole ARC/WARC file and all it's records are GZip'ed as a whole. The later mostly because this makes random access to individual record highly ineffective.

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