/**
* Creates a wrapper that implements either {@code ServletRequest} or {@code HttpServletRequest},
* depending on the type of {@code pImplementation.getRequest()}.
*
* @param pImplementation the servlet request to create a wrapper for
* @return a {@code ServletResponse} or {@code HttpServletResponse}, depending on the type of
* {@code pImplementation.getResponse()}
*/
public static ServletRequest createWrapper(final ServletRequestWrapper pImplementation) {
// TODO: Get all interfaces from implementation
if (pImplementation.getRequest() instanceof HttpServletRequest) {
return (HttpServletRequest)
Proxy.newProxyInstance(
pImplementation.getClass().getClassLoader(),
new Class[] {HttpServletRequest.class, ServletRequest.class},
new HttpServletRequestHandler(pImplementation));
}
return pImplementation;
}
/**
* Set the request that we are wrapping.
*
* @param request The new wrapped request
*/
public void setRequest(ServletRequest request) {
super.setRequest(request);
// Initialize the attributes for this request
synchronized (attributes) {
attributes.clear();
Enumeration names = request.getAttributeNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
Object value = request.getAttribute(name);
attributes.put(name, value);
}
}
}
public Object invoke(final Object pProxy, final Method pMethod, final Object[] pArgs)
throws Throwable {
try {
// TODO: Allow partial implementing?
if (pMethod.getDeclaringClass().isInstance(request)) {
return pMethod.invoke(request, pArgs);
}
// Method is not implemented in wrapper
return pMethod.invoke(request.getRequest(), pArgs);
} catch (InvocationTargetException e) {
// Unwrap, to avoid UndeclaredThrowableException...
throw e.getTargetException();
}
}