jaxb @XmlIDREF @XmlID work amazingly

Question

my xml input is

my java class for element: offering

import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
public class Offering {
    @XmlAttribute
    @XmlID
    private String id;
    @XmlAttribute
    @XmlIDREF
    private Prof prof;
    @XmlAttribute
    @XmlIDREF
    private Course course;
    @XmlAttribute
    private String section;
    @XmlAttribute
    private String time;
    @XmlAttribute
    private int capacity;

    public void setCapacity(int capacity) {
        this.capacity = capacity;
    }

    public int getCapacity() {
        return capacity;
    }

    public void setCourse(Course course) {
        this.course = course;
    }

    public Course getCourse() {
        return course;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getId() {
        return id;
    }

    public void setProf(Prof prof) {
        this.prof = prof;
    }

    public Prof getProf() {
        return prof;
    }

    public void setSection(String section) {
        this.section = section;
    }

    public String getSection() {
        return section;
    }

    public void setTime(String time) {
        this.time = time;
    }

    public String getTime() {
        return time;
    }    

    @Override
    public boolean equals(Object t) {
        if (t instanceof Offering) {
            if(((Offering)t).getId().equals(this.id)) {
                return true;
            }
        }
        return false;
    }

}

my java class for element: Prof

import javax.xml.bind.annotation.*;
@XmlAccessorType(XmlAccessType.FIELD)
public class Prof {
    @XmlAttribute
    private String firstName;   
    @XmlAttribute
    @XmlID
    private String id;

    public void setId(String id) {
        this.id = id;
    }

    public void setFirstname(String firstname) {
        this.firstName = firstname;
    }

    public String getFirstname() {
        return firstName;
    }

    public String getId() {
        return id;
    }

}

so if i simply load and save the input file to another file i amazingly see this: in offering elements which the prof id is less than 6, the prog attribute is not shown and are null in java context but offerings with prof id of 6 or more have the prof attribute properly

this event also occurs for course attribute of offering but for 9 instead of 6 as you see part of my output below:

...
 
 
 
 
 
...

it has no rule for example jaxb works properly for this input xml not just for id greater than 6:

abozar · Accepted Answer

my problem resolved by implementing an IDResolver

jaxb @XmlIDREF @XmlID work amazingly

Answers (1)

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