Java ant build jsonix

how do i build the following using ant?

http://sourceforge.net/p/jsonix/code/HEAD/tree/trunk/samples/

bash-3.2$ ant -buildfile project-build.xml
Buildfile: /Users/user/Desktop/sandbox/jsonix-code-293-trunk/samples/po/project-build.xml

generate-sources:

BUILD FAILED
/Users/user/Desktop/sandbox/jsonix-code-293-trunk/samples/po/project-build.xml:9: /Users/user/Desktop/sandbox/jsonix-code-293-trunk/samples/po/lib does not exist.

Total time: 0 seconds

Jsonix author here.

Jsonix itselfs built with Maven. So you actually have to do something like:

mvn clean install

This will generate three ZIPs in target directory:

• jsonix-samples-po-VERSION-batch-src.zip - sample batch/command line project
• jsonix-samples-po-VERSION-maven-src.zip - sample Maven project
• jsonix-samples-po-VERSION-ant-src.zip - sample Ant project

(Or just get these ZIP from Sourceforge).

These ZIPs are distrubutions of sample "Purchase Order" project for Ant, Maven and command line.

Apparently you're interested in Ant sample, so unzip the jsonix-samples-po-<VERSION>-ant-src.zip and run ant.