Method namedTypeToNameForTopLevel

src/Language/Java.ts:208–224

(type: Type)

    // FIXME: This is the same as for C#.
    protected namedTypeToNameForTopLevel(type: Type): NamedType | null {
        const definedTypes = type.directlyReachableTypes(t => {
            if ((!(t instanceof UnionType) && t.isNamedType()) || (t instanceof UnionType && !nullableFromUnion(t))) {
                return OrderedSet([t]);
            }
            return null;
        });
        assert(definedTypes.size <= 1, "Cannot have more than one defined type per top-level");

        // If the top-level type doesn't contain any classes or unions
        // we have to define a class just for the `FromJson` method, in
        // emitFromJsonForTopLevel.

        const first = definedTypes.first();
        if (first === undefined) return null;
        return first;
    }

    fieldOrMethodName = (methodName: string, topLevelName: Name): Sourcelike => {
        if (this.topLevels.size === 1) {