[ARIES-2051] Blueprint Spring SpringApplicationContext ClassLoader implementation not working for loadClass(name, resolve) operation

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: blueprint-spring-1.0.0
• Component/s: Blueprint
• Assignee: Unassigned
• Reporter: Piotr Klimczak
• Created: 11/Jun/21 22:24
• Updated: 11/Jun/21 22:24

Description

Blueprint Spring SpringApplicationContext uses its own ClassLoader.

This class loader implementation however is not handling calls to loadClass(String name, boolean resolve), which is used by other class loaders.
Therefore if we obtain class loader for app context and use it for example with Groovy, it will fail as 

@Override
public Class<?> loadClass(String name) throws ClassNotFoundException...

Will not be called at all.

Proper implementation should be:

@Override
public Class<?> loadClass(String name) throws ClassNotFoundException {
    return loadClass(name, false);
}

@Override
public Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
    for (ClassLoader cl : parentClassLoaders) {
        try {
            Class<?> c = cl.loadClass(name);
            if (resolve) {
                resolveClass(c);
            }
            return c;
        } catch (ClassNotFoundException e) {
            // Ignore
        }
    }
    throw new ClassNotFoundException(name);
}