Unmarshalling collections in JaxB
java, jaxb, unmarshalling
Solution
thats the way jaxb is handling collections. you have to be sure you have a non null collection when jaxb try to unmarshal.
there is a plugin (never used it myself) but can be helpful: https://jaxb2-commons.dev.java.net/collection-setter-injector/
Problem
suppose I have this class: ``` public class A { private HashMap<String, B> map; @XmlElement private void setB(ArrayList<B> col) { ... } private ArrayList<B> getB() { ... } } ``` When trying to unmarshall an xml document to this class using JaxB I notice that instead of calling the setB() method and sending me the list of B instances JaxB actually calls the getB() and adds the B instances to the returned list. Why? The reason I want the setter to be called is that the list is actually just a temporary storage from which I want to build the map field, so I thought to do it in the setter. Thanks.