[Geotools-gt2-users] A problem with ImageN in a modularized project

[Viatcheslav S. <Via...@h-...>]

Hi everyone,

does anybody use geotools in java9-modularized project (former project jigsaw)? I get a problem updating from geotools-33.0 to 34.1 in regard to ImageN migration.

Short about my project: it is gradle based and uses java modules. I could patch JAI using https://github.com/gradlex-org/extra-java-module-info, but fail so far doing it for ImageN. The test case is rather minimal and does not even use Geotools (but uses java modules):

public static void main(String[] args) {
       ImageN.getDefaultInstance();
       ...
}

I get exception:

Caused by: java.lang.ExceptionInInitializerError
      at java.base/java.lang.Class.forName0(Native Method)
      at java.base/java.lang.Class.forName(Class.java:467)
      at java.base/java.lang.Class.forName(Class.java:458)
      at imagen.core@0.9.1-module/org.eclipse.imagen.RegistryFileParser.getInstance(RegistryFileParser.java:187)
      at imagen.core@0.9.1-module/org.eclipse.imagen.RegistryFileParser.registerDescriptor(RegistryFileParser.java:312)
      at imagen.core@0.9.1-module/org.eclipse.imagen.RegistryFileParser.parseFile(RegistryFileParser.java:251)
      at imagen.core@0.9.1-module/org.eclipse.imagen.RegistryFileParser.loadOperationRegistry(RegistryFileParser.java:55)
      at imagen.core@0.9.1-module/org.eclipse.imagen.OperationRegistry.registerServices(OperationRegistry.java:1543)
      at imagen.core@0.9.1-module/org.eclipse.imagen.ThreadSafeOperationRegistry.registerServices(ThreadSafeOperationRegistry.java:529)
      at imagen.core@0.9.1-module/org.eclipse.imagen.OperationRegistry.initializeRegistry(OperationRegistry.java:311)
      at imagen.core@0.9.1-module/org.eclipse.imagen.ImageN.<clinit>(ImageN.java:351)
      at SSV9GUIKomponents/de.oowv.application.SSVMainWindow.main(SSVMainWindow.java:51)
      at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
      ... 6 more
Caused by: java.lang.NullPointerException: Cannot invoke "java.util.ResourceBundle.getString(String)" because "b" is null
      at imagen.core@0.9.1-module/org.eclipse.imagen.media.util.PropertyUtil.getString(PropertyUtil.java:159)
      at org.eclipse.imagen.media.affine.JaiI18N.getString(JaiI18N.java:26)
      at org.eclipse.imagen.media.affine.AffineDescriptor.<clinit>(AffineDescriptor.java:254)
      ... 19 more

The way JaiI18N reads the resources is not compatible with modules, it has to use classloader of the class for which the properties are being loaded. I submit an issue to ImageN tomorrow, but not sure how to proceed with planned Geotools version update so far. Any ideas for me / experience in regard to the issue?

With best regards

Viatcheslav Sysoltsev / Slava