extensions/el/src/main/java/org/trimou/el/Expressions.java
static Object eval(String expression, Options options, Configuration configuration) {
        ELProcessorFactory elpFactory = (ELProcessorFactory) configuration
                .getPropertyValue(ELProcessorFactory.EL_PROCESSOR_FACTORY_KEY);
        ELProcessor elp = elpFactory.createELProcessor(configuration);
        elp.getELManager().addELResolver(new OptionsELResolver(options));
        return elp.eval(expression);
    }
static Object eval(String expression, Options options, Configuration configuration) {
        ELProcessorFactory elpFactory = (ELProcessorFactory) configuration
                .getPropertyValue(ELProcessorFactory.EL_PROCESSOR_FACTORY_KEY);
        ELProcessor elp = elpFactory.createELProcessor(configuration);
        elp.getELManager().addELResolver(new OptionsELResolver(options));
        return elp.eval(expression);
    }
Note that we have to use a separate {@link ELProcessor} for each evaluation
as the {@link OptionsELResolver} may not be reused.

@param expression
@param options
@param configuration
@return the result of the expression evaluation