[aspectj-users] advising jsp's for i18n (because of problem with hiberna

["Raoul Schmidiger" <Raoul.Schmidiger@xxxxxxxxxxxxx>]

Title: advising jsp's for i18n (because of problem with hibernate property)

Hi aspectj users,

i have a problem with advising jsp's: in our app, we have some "dynamic i18n data". this is not the "static" stuff in the jsp's that can be translated through jsp tags. but instead, it is a buisness object that has multilingual descriptions of some sort.

the idea is to have i18n unaware business objects:

    public String getProductName() {
        return productName;
    }

instead of

    public String getProductName(Locale loc) {
        if(loc.getLanguage().equals("en") {
            return productNameEnglish;
        }
        ...
        return productNameDefault;
    }

So i thought, i would use an aspect:

        String around(): callGetProductName() {
                final I18NInfo info = I18NInfo.get();
                final Locale locale = info.getLocale();
                final String language = locale.getLanguage();
                System.out.println("GETTER: language: " + language);
                if(!language.equals("en")) {
                        return fetchLanguageFromDB(language);
                }
                return proceed();
        }

With a execution pointcut, this workes fine but since this property is mapped also by Hibernate, it doesn't. hibernate thinks, the value english value changed, when i return the french version and afterwards i have my french text in the db where the english should be.

To solve this i did the same with a call pointcut, since hibernate is accessing the method through refelction, it would not be touched by it. So i went on to precompile my JSP's and tried to advise the servlets:

This is what the compiled JSP, the servlet code looks like when accessing :

org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate("${product.productName}", java.lang.String.class, (PageContext)_jspx_page_context, null, false));

so my pointcut is not hooking in here...

pointcut callGetProductName():         
                call(public String com.ip.model.product.IProduct.getProductName());

Any ideas how to solve my problem?

Thanks, raoul