Allow to inject enum with package visibility [SPR-16284]

[spring-projects-issues]

Hans Desmet opened SPR-16284 and commented

A class with package visibility can be injected in a bean.
An enum can only be injected if it has public visibility.
Given a class

class MyClass {
  private final String value;
  public MyClass(String value) {
    this.value = value;
  }	
}

an enum

enum MyEnum {
  VALUE
}

a bean class

class MyBean {
  private final MyClass myClass;
  private final MyEnum myEnum;
  public MyBean(MyClass myClass, MyEnum myEnum) {
    this.myClass = myClass;
    this.myEnum = myEnum;
  }
}

and following bean definition:

<bean class='enumproblem.MyBean'>
  <constructor-arg value='value'/>
  <constructor-arg value='VALUE'/>
</bean>

you get an exception:java.lang.IllegalStateException: Cannot convert value of type 'java.lang.String' to required type 'enumproblem.MyEnum': no matching editors or conversion strategy found

When you change the visibility of the enum to public, the exception dissapears.

---

Affects: 5.0.2

Reference URL: https://github.com/desmethans/enumproblem1.git

Issue Links:

• BeanUtils.isSimpleValueType() returns false for enums overriding a method [SPR-16278] #20825 BeanUtils.isSimpleValueType() returns false for enums overriding a method

Referenced from: commits 4bb8375, 9beb978

Backported to: 4.3.14