All Questions
19 questions
3
votes
4
answers
780
views
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 = ...;
...
- 141
3
votes
2
answers
207
views
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 ...
- 47
4
votes
3
answers
1k
views
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
1
vote
1
answer
746
views
Where and how to connect to external API in my service class?
In my service class I would like to connect to external API. Where and how should I do it?
1) Inject in constructor ExternalClass and assign to private property. Next in other property in constructor ...
- 13
5
votes
2
answers
8k
views
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
3
votes
1
answer
540
views
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
2
votes
3
answers
205
views
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 ...
- 131
1
vote
1
answer
182
views
Better way to organize query methods in Android?
In my Android app I have:
A SQLiteHelper class that extends SQLIteOpenHelper, and takes care of things like table-creation and upgrades.
A SQLiteDatasource class that performs CRUD operations on the ...
- 3,028
3
votes
2
answers
3k
views
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
2
votes
1
answer
274
views
Is it OK to deprecate methods that need to be public due to the packaging model but are not to be used outside the codebase in Java?
I am currently working on a semi-large project that has several packages. There are 3 main packages, a "client" package, a "server" package and a "common" package. There are two jars, one for the ...
- 889
3
votes
3
answers
2k
views
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
4
votes
2
answers
1k
views
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
4
votes
2
answers
194
views
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
4
votes
2
answers
5k
views
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
0
votes
1
answer
83
views
How to record/store edits?
In many programs and web apps (stack exchange included) the program is able to backtrack what edits where made to the piece. My issue is similar: I want to be able to store a "timeline" of edits, ...
- 1,311