Method discoverClassName

java/jakarta/el/ExpressionFactory.java:321–337

Discover the name of class that implements ExpressionFactory. @param tccl ClassLoader @return Class name. There is default, so it is never null.

(ClassLoader tccl)

     * @return Class name. There is default, so it is never {@code null}.
     */
    private static String discoverClassName(ClassLoader tccl) {
        // First services API
        String className = getClassNameServices(tccl);
        if (className == null) {
            // Second el.properties file
            className = getClassNameJreDir();
        }
        if (className == null) {
            // Third system property
            className = getClassNameSysProp();
        }
        if (className == null) {
            // Fourth - default
            className = "org.apache.el.ExpressionFactoryImpl";
        }
        return className;
    }

    private static String getClassNameServices(ClassLoader tccl) {