All Questions
8 questions
6
votes
4
answers
35k
views
A DTO class having an ArrayList of its own type - is this considered a good design?
I came across a DTO class like the below one.
class PersonDTO {
private String firstName;
private String middleName;
private String lastName;
private String dob;
// some 50 fields ...
- 127
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
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
4
votes
2
answers
3k
views
Separating Read / Write Responsibilities of a DB
We're working on a reporting system which has a clear write and a read path. For example writes will only happen after consuming events from a queue and reads will only happen when serving requests ...
- 149
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
2
votes
5
answers
1k
views
What should a constructor contain?
What should a constructor contain?
In both cases, all three arguments are needed for the class to work.
Which approach is better and why?
1)
class Language {
LanguageRepository ...
- 31
1
vote
1
answer
333
views
Creating Set Subclasses or Allowing Outside Configuration
I have a TriggerCaller and a TriggerAction class. The Caller "calls" the do() method on the action, which is set with the TriggerCallers setAction() method. The rest of the program should deal with ...
- 1,311
0
votes
3
answers
3k
views
Wrapping a map with instance or static method
I have a java.util.Map<String, Object> object which different types of values in it. I don't want to cast whereever I do a get operation over this. To do this, I created different classes ...
- 109