Jar file for version 0.45.0 is compiled for code coverage

Describe The Bug

The jar file for version 0.45.0 that is deployed Maven central seems to by mistake be compiled for code coverage using the tool Cobertura. The byte-code of the classes in the jar file reference Cobertura classes.

The result is that Fax4J 0.45.0 from Maven central is not usable. Any application using it crashes with a NoClassDefFoundError (if Cobertura is not on the class path).

This seems to be the same issue that was reported here: https://github.com/sagiegurari/fax4j/issues/37

But the reporter of that issue failed to provide any details, so the problem could not be identified.

To Reproduce

Method 1

Run any application that creates a FaxClientFactory, without having Cobertura on the class-path. Observe the stack trace printout.

Method 2

Download the jar from Maven central: https://repo1.maven.org/maven2/net/sf/fax4j/fax4j/0.45.0/fax4j-0.45.0.jar
Unzip the jar.
Run command javap -p -c fax4j-0.45.0/org/fax4j/FaxClientFactory.class
Observe that the byte code printout contain references to Cobertura:

$ javap -p -c fax4j-0.45.0/org/fax4j/FaxClientFactory.class
Compiled from "FaxClientFactory.java"
public final class org.fax4j.FaxClientFactory {
  public static final transient int[] __cobertura_counters;
...
  static {};
    Code:
       0: invokestatic  #27                 // Method __cobertura_init:()V
       3: return

  public static void __cobertura_init();
    Code:
       0: getstatic     #16                 // Field __cobertura_counters:[I
       3: ifnonnull     18
       6: ldc           #132                // int 21
       8: newarray       int
      10: putstatic     #16                 // Field __cobertura_counters:[I
      13: ldc           #133                // String org/fax4j/FaxClientFactory
      15: invokestatic  #139                // Method net/sourceforge/cobertura/coveragedata/TouchCollector.registerClass:(Ljava/lang/String;)V
      18: return
...
}

Error Stack

--- exec:3.0.0:exec (default-cli) @ FaxSender ---
Exception in thread "main" java.lang.NoClassDefFoundError: net/sourceforge/cobertura/coveragedata/TouchCollector
  at org.fax4j.FaxClientFactory.__cobertura_init(FaxClientFactory.java)
  at org.fax4j.FaxClientFactory.<clinit>(FaxClientFactory.java)
  at se.myproject.send.Fax.<init>(Fax.java:73)
  at se.myproject.Main.main(Main.java:73)
Caused by: java.lang.ClassNotFoundException: net.sourceforge.cobertura.coveragedata.TouchCollector
  at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
  at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
  at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
  ... 4 more

Code Sample

Any code that creates a FaxClientFactory will trigger the error.

Other

Thanks for a nice and useful project! :)

sagiegurari / fax4j