[keycloak-user] Enabling comments in a JSON file?

[Eric B]

I'd like to add comments to an adapter JSON configuration file to help
document my configuration.  However, Keycloak throws an exception when
trying to parse the file:

14:11:53,804 DEBUG [org.keycloak.adapters.jaas.BearerTokenLoginModule]
(default task-15) Unable to find or parse file classpath:/keycloak.json due
to com.fasterxml.jackson.core.JsonParseException: Unexpected character ('/'
(code 47)): maybe a (non-standard) comment? (not recognized as one since
Feature 'ALLOW_COMMENTS' not enabled for parser)
 at [Source: java.util.zip.ZipFile$ZipFileInflaterInputStream at 3f9359f3;
line: 1, column: 2]: java.lang.RuntimeException:
com.fasterxml.jackson.core.JsonParseException: Unexpected character ('/'
(code 47)): maybe a (non-standard) comment? (not recognized as one since
Feature 'ALLOW_COMMENTS' not enabled for parser)
 at [Source: java.util.zip.ZipFile$ZipFileInflaterInputStream at 3f9359f3;
line: 1, column: 2]
at
org.keycloak.adapters.KeycloakDeploymentBuilder.loadAdapterConfig(KeycloakDeploymentBuilder.java:162)
at
org.keycloak.adapters.KeycloakDeploymentBuilder.build(KeycloakDeploymentBuilder.java:151)
at
org.keycloak.adapters.jaas.AbstractKeycloakLoginModule.resolveDeployment(AbstractKeycloakLoginModule.java:103)
at
org.keycloak.adapters.jaas.AbstractKeycloakLoginModule.initialize(AbstractKeycloakLoginModule.java:83)


Looking through the code, I see that the Keycloak JSON parser is
created/defined as:

org.keycloak.adapters.KeycloakDeploymentBuilder:

public static AdapterConfig loadAdapterConfig(InputStream is) {
    ObjectMapper mapper = new ObjectMapper(new
SystemPropertiesJsonParserFactory());
    mapper.setSerializationInclusion(JsonInclude.Include.NON_DEFAULT);
    AdapterConfig adapterConfig;
    try {
        adapterConfig = mapper.readValue(is, AdapterConfig.class);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    return adapterConfig;
}



Is there anyway I can configure the mapper to allow comments?  ie: I'm
looking to set:
   SystemPropertiesJsonParserFactory:enable(JsonParser.Feature.
ALLOW_COMMENTS);


But without DependencyInjection, I'm not sure how I can override the
factory definition cleanly, without having to resort to some ugly hacks
(ex: AspectJ, etc).

I'm guessing there might be a way to define a custom
KeycloakDeploymentBuilder, but I can't figure out how to configure that (if
it even exists).

Is there any chance to override/modify these settings?

Thanks,

Eric