[LANG-1542] ToStringBuilder.reflectionToString - Wrong JSON format when object has a List/Array of Enum

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.9, 3.10
• Fix Version/s: 3.11
• Component/s: lang.*

Environment

Open JDK 1.8

Docs Text

    /**
     * <p>Uses <code>ReflectionToStringBuilder</code> to generate a
     * <code>toString</code> for the specified object.</p>
     *
     * @param object the Object to be output
     * @param style the style of the <code>toString</code> to create, may be <code>null</code>
     * @return the String result
     * @see ReflectionToStringBuilder#toString(Object,ToStringStyle)
     */
    public static String reflectionToString(final Object object, final ToStringStyle style) {
        return ReflectionToStringBuilder.toString(object, style);
    }

• Assignee: Unassigned
• Reporter: Trần Ngọc Khoa
• Created: 15/May/20 07:59
• Updated: 04/Sep/20 18:53
• Resolved: 24/Jun/20 13:27

Description

I'm trying to log an object to console with JSON style using ToStringBuilder.reflectionToString from commons-lang3:3.10 but it seems generated a wrong JSON format.

Problem happening when I have a list of enums in my field list.

 

This is the class:
     public class Person {
     private long id;
     private String name;
     private List<MyEnum> listEnums;
    //getter and setter
    public String toString(){
     return ToStringBuilder.reflectionToString(this, ToStringStyle.JSON_STYLE); 
    }
}

 

And MyEnum:

 public enum MyEnum {
     FOOD,
     SPORT,
     BOOK,
     MUSIC
 }

When I call toString() of Person object. It shows like this

 {
     "id": 1,
     "name": "Karl",
     "listEnums": [FRIDAY, MONDAY, TUESDAY]
 }

 

What I expected is:

 {
     "id": 1,
     "name": "Karl",
     "listEnums": ["FRIDAY", "MONDAY", "TUESDAY"]
 }