https://issues.apache.org/bugzilla/show_bug.cgi?id=57135
Bug ID: 57135
Summary: ImportHandler shall ignore non-public classes
Product: Tomcat 8
Version: 8.0.14
Hardware: PC
Status: NEW
Severity: minor
Priority: P2
Component: EL
Assignee: [email protected]
Reporter: [email protected]
EL 3.0 specification says in 1.22.2 "Imports of Packages, Classes, and Static
Fields" that "Importing a package imports all the classes in the package."
I think that that is wrong and it shall actually say that it imports all
*public* classes in the package.
It may result in spirituous conflicts during resolveClass() -- see the example
below.
Consider the following example:
================================
Mr.Cameron has class com.cameron.Terminator and uses package import to make it
accessible.
ImportHandler handler = new ImportHandler();
handler.importPackage("com.cameron");
handler.resolveClass("Terminator");
If it really were importing all classes from a package, the above code will run
successfully on some JRE, but will fail on Oracle Java 7 JRE that has
"java.lang.Terminator" class, due to ambiguity between the two classes.
The "java.lang.Terminator" class is not part of public API of a JRE. A JRE
vendor is free to add such classes. It should not cause such spiritual
failures.
Javadoc for javax.el.ImportHandler in JavaEE 7 [1] says that
resolveClass(String) throws ELException - if the class is <...> not public.
If resolveClass(String) method were changed to return 'null' for non-public
classes instead of throwing an ELException, it would be a bit easier to
implement.
[1] http://docs.oracle.com/javaee/7/api/javax/el/ImportHandler.html
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