Friend of mine threw together this filter that exposes methods on the
ValueStack (hence your action) to the JSTL expression language. Now I can
finally do a:
<c:out value="${name}"/>
and have it hit the getName() method in my action. Very cool.
Just take the class below and add it as a filter. Use filter mapping of
*.action, or whatever your WebWork servlet is mapped to.
<filter-mapping>
<filter-name>JSTLFilter</filter-name>
<servlet-name>action</servlet-name>
</filter-mapping>
jim
import webwork.util.ValueStack;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.IOException;
public class JSTLFilter implements javax.servlet.Filter {
FilterConfig _filterConfig;
public FilterConfig getFilterConfig() {
return _filterConfig;
}
public void setFilterConfig(FilterConfig filterConfig) {
_filterConfig = filterConfig;
}
public void init(FilterConfig filterConfig) throws ServletException {
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {
// Make sure it is an HttpServletRequest, if so, create the wrapper and
pass it on
if (request instanceof HttpServletRequest) {
ServletRequest wrappedRequest = new
JSTLRequestWrapper((HttpServletRequest)request);
chain.doFilter(wrappedRequest, response);
} else {
// Otherwise, just pass the request on down the chain
chain.doFilter(request, response);
}
}
public void destroy() {
}
}
class JSTLRequestWrapper extends HttpServletRequestWrapper{
private ServletRequest wrappedRequest;
public JSTLRequestWrapper(HttpServletRequest request) {
super(request);
wrappedRequest = request;
}
public Object getAttribute(String s) {
Object attr = super.getAttribute(s);
if (null != attr) {
return attr;
} else {
// If not found, then try the ValueStack
ValueStack stack = ValueStack.getStack(wrappedRequest);
if (null == stack) return null;
else return stack.findValue(s);
}
}
}
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