问题
Let's say I have classes similar to domain classes in my application with some Long, Double, Date and String fields. These classes extend base class with some common fields and few common methods. Whenever I access class field (though getter) that is String, I want to make some changes to the value returned (for example remove html tags). Is there a better way than making implementations of getters for each fields of String type? What about inherited fields?
回答1:
Don't change default getter/setter implementations created for you by Grails. You would definitely mess up your application in various places. Grails uses convention over configuration so getters/setters should definitely remain unchanged.
Create your own methods that return what you want: for a field title create method getStrippedTitle(). You can add this method to transients too.
回答2:
If you change the value that's set, or return a value that's different from what was set, you'll confuse Hibernate. That's because when you load an instance from the database, Hibernate keeps the original data in its 1st-level cache, and returns a domain object instance to you. When you flush, it compares the current state with the original, and if it changed, it will push the changes to the database. So if you return a different value than what was set, but don't really change the value, Hibernate can't tell the difference.
You're much better off leaving the properties alone and creating methods that return altered data. One convention I've used is that if for example you have a String body field, you can access it via the property name body or the getter getBody(), but you can create a body() method that's unknown to Hibernate and returns whatever you want.
来源：https://stackoverflow.com/questions/9532453/modifying-return-value-of-getters-of-string-fields