NB: This project has been discontinued. It remains archived here for historical reasons. For a discussion of other integration solutions, see Interfacing From Non-Java Code.
Jar2Lib is a command line tool for generating C++ wrapper libraries around Java JAR files. It exposes the entire public Java API of the JAR in the corresponding C++ shared library, delegating to Java via JNI. The wrapping is performed using Jace.
Historical note: Jar2Lib was originally developed to integrate Bio-Formats with the Insight Toolkit, for use with the FARSIGHT project. However, we now have a dedicated inter-process solution for ITK integration instead which is easier to build from source, since it has no compile-time dependencies.
We recommend using Jar2Lib via the cppwrap-maven-plugin; see "Installation and usage" below.
If you prefer to use Jar2Lib directly from the command line outside Maven:
- Download the JARs linked above, as well as Apache Velocity 1.7 and its dependencies.
- With all necessary JARs in your current working directory, you can run Jar2Lib on the command line as follows:
$ java -cp '*' loci.jar2lib.Jar2Lib Usage: java loci.jar2lib.Jar2Lib projectId projectName library.jar [library2.jar ...] [-conflicts conflicts.txt] [-header header.txt] [-extras cmake_extras.txt] [-output /path/to/output-project] [-core java_core_classes.txt `
Installation and Usage
The easiest way to use Jar2Lib is via our cppwrap Maven plugin, which takes advantage of the Maven plug-in infrastructure to easily convert a Java library to C++ using Jar2Lib, without requiring any knowledge of Jar2Lib's workings or syntax. For example, it circumvents any need to download transitive dependencies.