SelectTag fails when items is an Enumeration [SPR-7112]

[spring-projects-issues]

Ed Belisle opened SPR-7112 and commented

Using an Enumeration class as items in a select tag throws an exception:

org.apache.jasper.JasperException: javax.servlet.ServletException: javax.servlet.jsp.JspException: Type [java.lang.Class] is not valid for option items
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    ...     

This is caused by a bug at Line 138 in class org.springframework.web.servlet.tags.form.OptionWriter:

Current line with error:

else if (this.optionSource instanceof Class && this.optionSource.getClass().isEnum()) { 

Suggested Correction:

else if (this.optionSource instanceof Class && ((Class)this.optionSource).isEnum()) { 

---

Affects: 3.0.2

[spring-projects-issues]

Ed Belisle commented

For a workaround, instead of

selectTag.setItems(MyEnum.class)

use

selectTag.setItems(MyEnum.class.getEnumConstants())

[spring-projects-issues]

Juergen Hoeller commented

Good catch! Fixed for 3.0.3.

This will be available in tonight's 3.0.3 snapshot. Feel free to give it an early try!

Juergen