Method toJavaTypes

packages/jsii-pacmak/lib/targets/java.ts:3036–3074

* Convert a jsii type to a union of Java types

(
    typeref: spec.TypeReference,
    { typeSymGen = undefined as SymGen | undefined } = {},
  )

   * Convert a jsii type to a union of Java types
   */
  private toJavaTypes(
    typeref: spec.TypeReference,
    { typeSymGen = undefined as SymGen | undefined } = {},
  ): JavaType[] {
    typeSymGen = typeSymGen ?? newTypeSymGen();

    if (spec.isPrimitiveTypeReference(typeref)) {
      return [this.toJavaPrimitive(typeref.primitive)];
    } else if (spec.isCollectionTypeReference(typeref)) {
      return [
        this.toJavaCollection(typeref, {
          typeSymGen,
        }),
      ];
    } else if (spec.isNamedTypeReference(typeref)) {
      const literal = literalTypeReference(typeref);
      return literal
        ? [mkStatic(literal)]
        : [mkStatic(this.toNativeFqn(typeref.fqn))];
    } else if (spec.isUnionTypeReference(typeref)) {
      return typeref.union.types.flatMap((subtype) =>
        this.toJavaTypes(subtype, { typeSymGen }),
      );
    } else if (spec.isIntersectionTypeReference(typeref)) {
      const typeVariable = typeSymGen();

      return [
        mkParam(
          typeVariable,
          `${typeVariable} extends ${typeref.intersection.types
            // Take the first type of any given union (an intersect-of-union
            // would have been rejected by jsii-compiler anyway)
            .map((t) => displayStatic(this.toJavaTypes(t)[0]))
            .join(' & ')}`,
        ),
      ];
    }
    throw new Error(`Unrenderable type reference: ${JSON.stringify(typeref)}`);
  }

  private toJavaCollection(
    ref: spec.CollectionTypeReference,