java - Empty/Null values from post request are getting assigned to 0 - 


<student> <id>1</id> <badge></badge> <name>matt</name> </student>

this xml post when observe during post.

public class student implements serializable{  long id; integer badge; string name; }

my web service : 

    @path("add")     @post     @consumes({mediatype.xml,mediatype.json})     @produces({mediatype.xml,mediatype.json})     public response add(student student)     {     }

when debug on add method on service layer , variable badge gets assigned value "0", though not provided gui.database field badge integer(postgres).

is related integer variable, assigns default value 0 if not present ?

the type integer reference type. when create instance of class variable of reference type, it's default value null. behavior seeing not java's.

jersey uses jaxb marshall , unmarshall entities. when sees have badge field has empty text element must make decision proper value set is. doesn't make sense give null since there element there. decides initialize 0.


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