Today, when I was creating a RESTful service in JavaEE for a dynamic web application to run in IBM® WebSphere Application Server (WAS) an error like this was appearing:
Class has two properties of the same name "userId" this problem is related to the following location: at public java.lang.String com.rest.model.UserProfile.getUserId() at com.rest.model.UserProfile this problem is related to the following location: at private java.lang.String com.rest.model.UserProfile.userId at com.rest.model.UserProfile
After looking for documentation and all related issues, I found a solution that I would like to share with you:
1) My class looked like this:
package com.rest.model;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlType;
/**
* @author Alex Arriaga
*/
@XmlRootElement(name = "profile")
public class UserProfile{
@XmlElement(name="user_id")
private String userId;
// More code here...
public UserProfile(){
}
public UserProfile(String s){
this.test = s;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
// More code here...
}
2) How to fix it
It was really easy after spending time to search this issue. My JAXB was looking at both the getUserId() method and the member userId. I didn’t say which JAXB implementation I was using, the exception was fairly clear but that was the first time that I was working with JABX, at the beginning it is a little complicated to understand that message.
To solve this issue just was necessary to specify to JAXB which implementation I wanted to use using @XmlAccessorType(XmlAccessType.FIELD) annotation after @XmlRootElement(name = “profile”) please, see next code to have a clearer idea.
package com.rest.model;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlType;
/**
* @author Alex Arriaga
*
*/
@XmlRootElement(name = "profile")
@XmlAccessorType(XmlAccessType.FIELD) // This line was added
public class UserProfile{
@XmlElement(name="user_id")
private String userId;
// More code here...
public UserProfile(){
}
public UserProfile(String s){
this.test = s;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
// More code here...
}
That’s it!
Be happy with your code.