Build with gradle

[martinda]

I am attempting to upgrade the build system to use Gradle 6.x. So far so good, but I hit a snag with the constraint solver tests. To run this PR, use Gradle 6.x, and Java 1.8. The sourceCompatibility = '1.5' is set in the build.gradle. To build what I have so far, type:

gradle build

The tests fail with:

> Task :randsolver:test FAILED

com.newisys.randsolver.TestCyclic > testTwoVars FAILED
    java.lang.ExceptionInInitializerError at TestCyclic.java:89
        Caused by: java.lang.ClassCastException at TestCyclic.java:89

com.newisys.randsolver.TestCyclic > testCyclic FAILED
    java.lang.NoClassDefFoundError at TestCyclic.java:63

com.newisys.randsolver.TestMapperFactory > initializationError FAILED
    java.lang.NoClassDefFoundError at TestMapperFactory.java:156
...

Because of the java.lang.ExceptionInInitializerError I suspect this has to do with the static method call in TestCyclic.java. What do you think?

[martinda]

Using

------------------------------------------------------------
Gradle 7.3.3
------------------------------------------------------------

Build time:   2021-12-22 12:37:54 UTC
Revision:     6f556c80f945dc54b50e0be633da6c62dbe8dc71

Kotlin:       1.5.31
Groovy:       3.0.9
Ant:          Apache Ant(TM) version 1.10.11 compiled on July 10 2021
JVM:          17.0.1 (Eclipse Adoptium 17.0.1+12)
OS:           Linux 5.4.0-92-generic amd64

Then run:

cd jove
gradle build

The errors are due to casting, but I don't know how to solve it because I don't understand the intent of the code.

Caused by: java.lang.ClassCastException: class com.newisys.langschema.java.JavaTypeVariable cannot be cast to class com.newisys.langschema.java.JavaClass (com.newisys.langschema.java.JavaTypeVariable and com.newisys.langschema.java.JavaClass are in unnamed module of loader 'app')
	at com.newisys.langschema.java.JavaSchema.buildMethod(JavaSchema.java:644)
...

Looks like the error is in JavaSchema.java.