https://issues.apache.org/bugzilla/show_bug.cgi?id=50105
Summary: Violation of JSP-EL spec version 2.1 when coerce Enum
to String
Product: Tomcat 6
Version: 6.0.29
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
AssignedTo: [email protected]
ReportedBy: [email protected]
Section 1.18.2 of the 2.1 JSP-EL spec (Coerce A to String) says "if A is Enum,
return A.name()". This is not always the case in Tomcat 6.0.29. To demonstrate
the bug, I created some custom code (enum, Tag, JSP):
Tag:
public class MyCustomTag implements Tag {
public void setValue(String value) {
System.out.println(value);
}
@Override public void setPageContext(PageContext pc) {}
@Override public void setParent(Tag t) {}
@Override public Tag getParent() { return null; }
@Override public int doStartTag() throws JspException { return SKIP_BODY; }
@Override public int doEndTag() throws JspException { return EVAL_PAGE; }
@Override public void release() {}
}
TLD:
<?xml version="1.0" encoding="UTF-8" ?>
<taglib xsi:schemaLocation="http://java.sun.com/xml/ns/javaeeweb-
jsptaglibrary_2_1.xsd" xmlns="http://java.sun.com/xml/ns/javaee";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; version="2.1">
<tlibversion>1.0</tlibversion>
<uri>http://my-domain.org/customLib</uri>
<tag>
<name>customTag</name>
<tagclass>mypackage.MyCustomTag</tagclass>
<bodycontent>empty</bodycontent>
<attribute>
<name>value</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
</taglib>
Enum:
public enum MyEnum {
APPLE, ORANGE;
@Override
public String toString() {
return "this is a " + name();
}
}
JSP:
<%...@taglib prefix="myLib" uri="http://my-domain.org/customLib"%>
<myLib:customTag value="${myEnum}"/>
<myLib:customTag value="foo.${myEnum}.bar"/>
Because the value myEnum is was set to MyEnum.ORANGE, i would expect, that this
outputs:
ORANGE
foo.ORANGE.bar
But the output in catalina.out instead is:
ORANGE
foo.this is a ORANGE.bar
Which is a violation of the JSP-EL spec (if I understood it right).
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