Using withDefaultResolver() or withEnumResolver() in groovy code results in error

[eyammer]

When I use either withDefaultResolver() or withEnumResolver() I get the following error:

Exception in thread "main" java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.codehaus.groovy.vmplugin.v9.Java9.of(Java9.java:163)
	at org.codehaus.groovy.vmplugin.v9.Java9.getInvokeSpecialHandle(Java9.java:177)
	at org.codehaus.groovy.runtime.ConversionHandler.lambda$invoke$0(ConversionHandler.java:97)
	at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
	at org.codehaus.groovy.runtime.ConversionHandler.invoke(ConversionHandler.java:96)
	at jdk.proxy2/jdk.proxy2.$Proxy9.resetAfterSchemaGenerationFinished(Unknown Source)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
	at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
	at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
	at com.github.victools.jsonschema.generator.SchemaGeneratorTypeConfigPart.resetAfterSchemaGenerationFinished(SchemaGeneratorTypeConfigPart.java:538)
	at com.github.victools.jsonschema.generator.SchemaGeneratorConfigPart.resetAfterSchemaGenerationFinished(SchemaGeneratorConfigPart.java:422)
	at com.github.victools.jsonschema.generator.impl.SchemaGeneratorConfigImpl.resetAfterSchemaGenerationFinished(SchemaGeneratorConfigImpl.java:92)
	at com.github.victools.jsonschema.generator.SchemaBuilder.createSchemaForSingleType(SchemaBuilder.java:133)
	at com.github.victools.jsonschema.generator.SchemaBuilder.createSingleTypeSchema(SchemaBuilder.java:57)
	at com.github.victools.jsonschema.generator.SchemaGenerator.generateSchema(SchemaGenerator.java:60)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.codehaus.groovy.runtime.callsite.PlainObjectMetaMethodSite.doInvoke(PlainObjectMetaMethodSite.java:43)
	at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSite.invoke(PojoMetaMethodSite.java:191)
	at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:56)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:139)
	at com.crb.devops.jenkins.utils.CreatePipelineJsonSchema.main(CreatePipelineJsonSchema.groovy:35)
Caused by: java.lang.IllegalAccessException: module jdk.proxy2 does not open jdk.proxy2 to unnamed module @19e4653c
	at java.base/java.lang.invoke.MethodHandles.privateLookupIn(MethodHandles.java:259)
	... 38 more

Below is my code:

class CreatePipelineJsonSchema {
    static void main(String[] args) {
        SchemaGeneratorConfigBuilder configBuilder = new SchemaGeneratorConfigBuilder(SchemaVersion.DRAFT_7, OptionPreset.PLAIN_JSON);
        configBuilder.forFields()
                .withRequiredCheck(field ->  field.getAnnotationConsideringFieldAndGetter(Required.class)!= null);


        configBuilder.forFields().withDefaultResolver(field -> {
            JsonProperty annotation = field.getAnnotationConsideringFieldAndGetter(JsonProperty.class);
            return annotation == null || annotation.defaultValue().isEmpty() ? null : annotation.defaultValue();
        });


        SchemaGeneratorConfig config = configBuilder.with(Option.EXTRA_OPEN_API_FORMAT_VALUES).build();

        SchemaGenerator generator = new SchemaGenerator(config);
        JsonNode jsonSchema = generator.generateSchema(ConfigurationForSchema.class);

        Gson gson = new GsonBuilder().setPrettyPrinting().create()

       def sdf = gson.fromJson(jsonSchema.toString(), JsonObject.class)
         gson.toJson(sdf)

        File schemaFile = new File("pipeline-schema.json")
        schemaFile.createNewFile()
        CommonUtils.writeToFile(schemaFile.getAbsolutePath(), gson.toJson(sdf))
    }
}

This is my annotated field

@Required
@JsonProperty(defaultValue = "BuildKit")
private String tool

I am seeing the same behavior when using withEnumResolver().

How can I implement defaults and enumerate values for a string?

[CarstenWickner]

Hi @eyammer,

This looks like a Groovy specific issue: your arrow/lambda functions are being instantiated as a "proxy" – or rather the default implementation of the StatefulConfig interface's resetAfterSchemaGeneration() method – and that "proxy" is then rejected by the Java module system.

The StatefulConfig interface was introduced with version 4.29.0.
Can you please try your code against version 4.28.0 of the schema generator, to confirm that this is to blame?

[eyammer]

Yes, this is the issue!!! Thank you so much for taking the time to help with this.