All Questions
19 questions
8votes
2answers
324views
Low coupling processing big quantities of data
Usually I achieve low coupling by creating classes that exchange lists, sets, and maps between them. Now I am developing a Java batch application and I can't put all the data inside a data structure ...
- 1,368
7votes
3answers
384views
When module calling gets ugly
Has this ever happened to you? You've got a suite of well designed, single-responsibility modules, covered by unit tests. In any higher-level function you code, you are (95% of the code) simply ...
- 736
5votes
2answers
8kviews
Design pattern for processing a huge CSV file -- Java
I am learning design patterns in Java and also working on a problem where I need to handle huge number of requests streaming into my program from a huge CSV file on the disk. Each CSV line is one ...
- 61
4votes
3answers
1kviews
Passing object or using the field
I would like to know what is a more appropriate way to code in Java. Is it generally better to pass entire objects in the method's parameters or just using the fields from the class? Using the field: ...
- 163
4votes
3answers
4kviews
What is the preferred access modifier for instance variables of a data transfer object?
I'm creating a data transfer object and can't decide whether it would be better to just give public access to the instance variables or if there would be a purpose to using getters and setters to ...
- 2,696
4votes
2answers
1kviews
Can classes violate Single Responsibility if they delegate internal tasks?
I have two classes Output and Timeline, neither of which violate SR, but the two of them are linked together. So what I'd like to do is have a class called Elco (there's a reason behind the name) that ...
- 1,311
4votes
2answers
5kviews
How to delete an object when other things reference it (and not making the code full of inter-dependencies)
The situation: In my program, there are a list of cues. To call a cue at a certain time, there are objects called Triggers. Cues have many public methods that allow them, among other things, to be "...
- 1,311
4votes
2answers
194views
Should I write a wrapper within a manager object?
I have three classes that work together to do one function (from the perspective of the rest of my program). There is a little bit of set up between them, so, to make it easier for the rest of my ...
- 1,311
3votes
4answers
780views
Is it a bad practice to have an interface method to tell whether it can handle an object?
interface Resolver { boolean canResolve(SomeInput input); SomeOutput resolve(SomeInput input); } public static void main(String[] args) { List<Resolver> resolvers = ...; ...
3votes
2answers
2kviews
Lazy Processing of Streams
I have the following problem scenario: I have a text file and I have to read it and split it into lines. Some lines might need to be dropped (according to criteria that are not fixed). The lines that ...
- 19.8k
3votes
2answers
3kviews
Using MVC style, where is the best place to put SQL functionality?
I am wondering about best practices here. MVC (Model - View - Controller) patterns involve separating components of your program that model the data, manipulate those models, and display those ...
- 3,028
3votes
2answers
207views
Checking the user in almost all use cases
I have a web application that has Users that belong to Companies. A User can only belong to 1 Company at a time and they can manage their own company information. I'm using java spring and I'm ...
3votes
3answers
2kviews
Parallel Class/Interface Hierarchy with the Facade Design Pattern?
About a third of my code is wrapped inside a Facade class. Note that this isn't a "God" class, but actually represents a single thing (called a Line). Naturally, it delegates responsibilities to the ...
- 1,311
3votes
1answer
540views
Contract interface/class with inner classes/interfaces
Brief description of my project structure. I have some base classes like BaseView, BasePresenter ... . Also my project consists of modules, module represents one complete part of the application. ...
- 1,558
2votes
3answers
205views
Data duplication, can it be an unavoidable practice in this example?
Say I have different employees of type Employee stored in a list inside a class SubCase. public class SubCase{ protected ArrayList<Employee> employees; ... } SubCase represents a part ...
