Custom Scalar in Graphql-java

Question

We are planning use Graphql as backend server in our application. We choose Graphql-Java to develop our POC. We came across a stituation to create our own scalartype to han

Answer 1

In code first approach (SPQR v0.9.6) adding @GraphQLScalar is enough. Or, as alternative, add scalar definition to GraphQLSchemaGenerator:

new GraphQLSchemaGenerator()
.withScalarMappingStrategy(new MyScalarStrategy())

And define MyScalarStrategy:

class MyScalarStrategy extends DefaultScalarStrategy {

@Override
public boolean supports(AnnotatedType type) {
  return super.supports(type) || GenericTypeReflector.isSuperType(MyScalarStrategy.class, type.getType());
}
}