Fix ugly hacks in ActionStartEntryParser

[skiwi2]

In the parse method in the ActionStartEntryParser class there currently is this block of code:

        //TODO clean this up
        Set<EntryParser> innerEntryParsers;
        try {
            innerEntryParsers = entryParsers.stream()
                .map(Object::getClass)
                .map(clazz -> {
                    try {
                        if (restrictIndentation) {
                            if (clazz.equals(ActionStartEntryParser.class)) {
                                Method method = clazz.getDeclaredMethod("createForIndentation", int.class, Set.class);
                                return (EntryParser)method.invoke(null, indentation + 4, entryParsers);
                            }
                            Method method = clazz.getDeclaredMethod("createForIndentation", int.class);
                            return (EntryParser)method.invoke(null, indentation + 4);
                        }
                        if (clazz.equals(ActionStartEntryParser.class)) {
                            Method method = clazz.getDeclaredMethod("create", Set.class);
                            return (EntryParser)method.invoke(null, entryParsers);
                        }
                        Method method = clazz.getDeclaredMethod("create");
                        return (EntryParser)method.invoke(null);
                    } catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException ex) {
                        throw new RuntimeException(ex);
                    }
                })
                .collect(Collectors.toSet());
        } catch (RuntimeException ex) {
            throw new NotParsableException(ex);
        }

The goal is to instantiate the supplied set of entry parsers with the correct indentation level.

The best solution may be to use a factory pattern and supply the factories instead.