#3 Custom validation messages

[Jose Miguel Samper]

As suggested in Thymeleaf forum
http://forum.thymeleaf.org/New-HTML5-validation-dialect-td4025633.html

provided custom validation messages.

For example, for annotation

@Pattern(regexp = "^[a-zA-Z0-9_-]{3,15}$",
     message =  "{com.web.error.incorrect.user.password}")
private String password;

generate the following HTML

<input ... oninvalid="setCustomValidity('Incorrect password')" />

[globalbus]

That's solved by me in my fork on branch "CustomValidationMessage"
https://bitbucket.org/globalbus/html5-validator-dialect-fork

Code is ugly, but right now it's only one possible solution to do that properly.

Message resolution works by Spring internals, but default messages are also resolvable by javax.validation.MessageInterpolator.

All messages are dot terminated and finally merged to one string. Sadly, custom formatting, like new line characters, not working on "setCustomValidity".

That solution needs more testing, but right now working in my production enviroment without problems.