Now what I'm looking for is one or multiple people that would be willing to fulfill a tutoring / teaching role. And often do I come to realisation that these widgets don't do what I need them to do, so then I'm back to the documentation trying to figure out what elements to put together.
Iban validator java code#
Now I'm sure that if i spend enough hours into reading / studying their code I will eventually learn how it works or what it does.īut in general it takes a lot of time/energy as a majority of the widgets is just very poorly written, where function names aren't descriptive of what they actually do etc, poor choice of variable names. So I've tried looking at other widget's source code and trying to learn from those.īut pretty much all widget packages and code written by others are uncommented. The fact that it is also extending dojo/dijit in many cases does my head in when I'm trying to look for what certain functions do. Just some simple use-case scenarios would be lovely additions to this documentation. The client documentation often includes one variation which often is the bare minimum code example to display where & how the functionality is used.īut often excludes / avoids complex functionality. I constantly run into the issue having new widget ideas or functional requirements.īut each time I decide to dive into it just feels like I run into the same issue.
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In addition, we can test the REST controller API using a free API life cycle testing application, such as Postman. contentType(MediaType.APPLICATION_JSON_UTF8)) andExpect(MockMvcResultMatchers.jsonPath("$.name", Is.is("Name is mandatory"))) andExpect(MockMvcResultMatchers.status().isBadRequest()) MockMvc.perform(MockMvcRequestBuilders.post("/users") Let's look at the REST controller implementation: class UserController User user) "
Spring Boot makes this seemingly complex process really simple through the implementation of a REST controller. Therefore, we can validate them and perform a few further tasks, depending on the validation results.
Of course, we need to implement a layer that allows us to get the values assigned to our User object's constrained fields.
Since we'll use Spring Data JPA for saving users to the in-memory H2 database, we also need to define a simple repository interface for having basic CRUD functionality on User objects: For further information, please read the official bean validation docs. Therefore, when Spring Boot validates the class instance, the constrained fields must be not null and their trimmed length must be greater than zero.Īdditionally, Bean Validation provides many other handy constraints besides This allows us to apply and combine different validation rules to the constrained classes. Also, we specified the error messages with the message attribute. The implementation of our User entity class is pretty anemic indeed, but it shows in a nutshell how to use Bean Validation's constraints to constrain the name and email fields.įor simplicity's sake, we constrained the target fields using only the constraint. standard constructors / setters / getters / toString
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