Support immutable datamodels
----------------------------
Key: STS-836
URL: http://www.stripesframework.org/jira/browse/STS-836
Project: Stripes
Issue Type: Improvement
Affects Versions: Release 1.5.6
Reporter: Tim Chen
At the moment Stripes does not support creation of immutable datamodels.
So if you have an actionbean such as:
{code}
public class TestAction implements ActionBean {
private TestUser testUser;
/// -- snipped
public TestUser getTestUser() {
return testUser;
}
public void setTestUser(TestUser testUser) {
this.testUser = testUser;
}
}
{code}
Where TestUser is an immutable class, the current
DefaultActionBeanPropertyBinder will not support creation of TestUser.
While in this example it is easy to implement an ActionBeanPropertyBinder that
could potentially do this for you, it is becomes less trivial when you have
List<TestUser> as your property.
Indexed Property handling is done in DefaultActionBeanPropertyBinder but it is
hard to intercept in order to implement this type of functionality.
This is not an easy problem to solve though as knowing constructor parameter
order is much harder than just finding the right setter.
Other frameworks have different ways of solving this (Jackson uses Constructor
annotations, MyBatis uses mappings).
While this is one possible solution, another slightly easier solution may be to
allow intermediate builders to be used.
Defining a Builder interface (or annotation) with just a single build method
would suffice.
That builder could have the setters required and handle the building
automatically.
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