systems-ucum should depend on systems-quantity

[mjog]

I just had cause to add systems-ucum (to access the troy-ounces constant) to an existing project that had only been using Indriya only, using the following:

    <dependency>
      <groupId>systems.uom</groupId>
      <artifactId>systems-ucum</artifactId>
      <version>2.2</version>
      <scope>compile</scope>
    </dependency>

And received the following stack as a result:

Caused by: java.lang.ClassNotFoundException: systems.uom.quantity.Drag
	at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	at systems.uom.ucum.UCUM.<clinit>(UCUM.java:710)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)
	at tech.units.indriya.format.SymbolMap.<init>(SymbolMap.java:116)
	at tech.units.indriya.format.SymbolMap.of(SymbolMap.java:143)
	at systems.uom.ucum.format.UCUMFormat$Parsing.<clinit>(UCUMFormat.java:432)
	at systems.uom.ucum.format.UCUMFormat.getInstance(UCUMFormat.java:110)
	at systems.uom.ucum.spi.UCUMFormatService.<init>(UCUMFormatService.java:82)
	at systems.uom.ucum.spi.UCUMServiceProvider.getFormatService(UCUMServiceProvider.java:61)
[snip]

To resolve this, I also had to add the following:

    <dependency>
      <groupId>systems.uom</groupId>
      <artifactId>systems-quantity</artifactId>
      <version>2.2</version>
      <scope>runtime</scope>
    </dependency>

I would expect that if systems-ucum has a hard dependency on systems-quantity, then it should depend on it.

[keilw]

Thanks for pointing this out. There is a dependency between systems-quantity and the respective system modules, they should be the same, especially if new quantities are supported that were not before.

Normally you should not need the scope "compile", which is most likely why you needed to explicitly add systems-quantity. It is usually included/provided with each system module.

Please try 2.2.1-SNAPSHOT of each module, and let us know here, if the problem still exists if you use 2.2.1-SNAPSHOT for all relevant modules.