Hi,
The truth is that there isn't a 'for-free' solution, but you can come up with
something moderately elegant if you think about it.
The first thing I did was to write a simple JSP function that replaces the
ternary operator in JSP el - nothing wrong with that, it just takes a lot of
typing each time:
public class DisplayFunctions {
public static String printIfMatches(String s1, String s2, String value) {
if(s1 == null || s2 == null) return "";
if(s1.matches(s2)) return value;
return "";
}
}
I then use this function to control the output of the 'active' class on my
menus.
Assuming I have a 'top' menu, which when clicked brings up a contextual
sub-menu, I group my ActionBeans by package so that I can do something like:
<li class="${df:printIfMatches(actionBean.class.package.name,
'com.myapp.action.admin', 'active')}">
<fmt:message key="link.admin" var="admin"/>
<s:link beanclass="com.myapp.action.admin.AdminHomeActionBean"
rel="${admin}">${admin}</s:link>
</li>
<li class="${df:printIfMatches(actionBean.class.package.name,
'com.myapp.action.ordering', 'active')}">
<fmt:message key="link.ordering" var="ordering"/>
<s:link beanclass="com.myapp.action.ordering.OrderingHomeActionBean"
rel="${ordering}">${ordering}</s:link>
</li>
Then in the sub-menus (use a separate JSP file - better still a tag file - to
make it simple to include), something like:
<ul id="submenutabs">
<li>
<s:link beanclass="com.myapp.action.admin.RoleActionBean"
class="${df:printIfMatches(actionBean.class.simpleName,
'RoleActionBean', 'active')}">
<fmt:message key="link.manageRoles"/></s:link>
</li>
<li>
<s:link beanclass="com.myapp.action.admin.UserActionBean"
class="${df:printIfMatches(actionBean.class.simpleName,
'UserActionBean', 'active')}">
<fmt:message key="link.manageUsers"/></s:link>
</li>
<li>
<s:link beanclass="com.myapp.action.admin.PropertiesActionBean"
class="${df:printIfMatches(actionBean.class.simpleName,
'PropertiesActionBean', 'active')}">
<fmt:message
key="link.manageApplicationProperties"/></s:link>
</li>
</ul>
Better still, each repeating block (so <li>, <s:link>, etc.) should also be
defined in a separate JSP tag file (with the items that differ - package name,
etc. - supplied via parameters) so that you can reduce the amount of typing
further still.
Hope that this helps in some way, or at least gives you something useful to
think on.
Cheers
Stu
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