You can do the same thing WITHOUT the parameter values in the
struts-config.xml and the following code:
<html:form action="/user">
<html:submit property="new.method"><bean:message
key="button.new"/></html:submit>
<html:link page="/user.do?new.method=''">New</html:link>
</html:form>
if you what the method to be "new(ActionMapping mapping, ActionForm
form, HttpServletRequest request, HttpServletResponse response) and
you use the following class (with logging changes) instead of
LookupDispatchAction:
public abstract class StateBaseAction
extends Action {
private static final String DISPATCH_METHOD_SUFFIX = ".method";
private static final String EXECUTE = "execute";
private static final String PERFORM = "perform";
private static final String DISPATCH_RECURSIVE = "dispatch.recursive";
private static final String DISPATCH_METHOD = "dispatch.method";
protected HashMap methods = new HashMap();
protected Class [] types = { ActionMapping.class,
ActionForm.class,
HttpServletRequest.class,
HttpServletResponse.class };
public abstract ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws IOException,
ServletException,
NoSuchMethodException;
protected void saveMessages(HttpServletRequest request,
ActionMessages errors) {
if ((errors == null) || errors.isEmpty()) {
request.removeAttribute(Globals.ERROR_KEY);
return;
}
request.setAttribute(Globals.ERROR_KEY, errors);
}
public String getMessage(HttpServletRequest request,
String key)
throws IOException,
ServletException {
HttpSession session = request.getSession();
Locale locale =
(Locale)session.getAttribute(Globals.LOCALE_KEY);
MessageResources messages = this.getResources(request);
return messages.getMessage(locale,key);
}
protected ActionForward method(Action action,
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
Class clazz = action.getClass();
String methodName = getMethodName(request,mapping);
if (EXECUTE.equals(methodName) || PERFORM.equals(methodName)){
MessageResources messages = MessageResources.getMessageResources
("org.apache.struts.actions.LocalStrings");
String message = messages.getMessage(DISPATCH_RECURSIVE,
mapping.getPath());
throw new ServletException(message);
}
Method method = null;
try {
method = getMethod(clazz,methodName);
} catch(NoSuchMethodException nsme) {
MessageResources messages = MessageResources.getMessageResources
("org.apache.struts.actions.LocalStrings");
String message = messages.getMessage(DISPATCH_METHOD,
mapping.getPath(), methodName);
throw nsme;
}
ActionForward forward = null;
try {
Object args[] = { mapping, form, request, response };
forward = (ActionForward)method.invoke(action, args);
} catch(ClassCastException cce) {
StdOut.log(SiteConstant.ERROR_LOG,"StateBaseAction error 108 = "
+ cce.getMessage());
} catch(IllegalAccessException iae) {
StdOut.log(SiteConstant.ERROR_LOG,"StateBaseAction errorn 110 =
" + iae.getMessage());
} catch(InvocationTargetException ite) {
Throwable t = ite.getTargetException();
if (t instanceof Exception) {
StdOut.log(SiteConstant.ERROR_LOG,"StateBaseAction error 115 =
" + ((Exception)t).getMessage());
} else {
StdOut.log(SiteConstant.ERROR_LOG,"StateBaseAction error 117 =
" + ite.getMessage());
}
}
return forward;
}
private static String getMethodName(HttpServletRequest request,
ActionMapping mapping) {
String methodName = null;
String buttonValue = null;
String paramProperty = mapping.getParameter();
if((paramProperty != null)) {
int index = paramProperty.indexOf('.');
if(index > -1) {
methodName = paramProperty.substring(0,index);
} else {
return methodName = paramProperty;
}
}
Enumeration enum = request.getParameterNames();
while(enum.hasMoreElements()) {
buttonValue = (String)enum.nextElement();
if(buttonValue.indexOf(DISPATCH_METHOD_SUFFIX) >= 0) {
methodName = buttonValue;
break;
}
}
if(methodName == null) {
return null;
}
return methodName.substring(0,methodName.indexOf('.'));
}
private Method getMethod(Class clazz,
String name)
throws NoSuchMethodException {
synchronized(methods) {
Method method = (Method) methods.get(name);
if (method == null) {
method = clazz.getMethod(name, types);
methods.put(name, method);
}
return (method);
}
}
protected ActionForward cancelled(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
return null;
}
}
Jack
On Sat, 15 Jan 2005 03:01:45 -0600, Kishore Senji <[EMAIL PROTECTED]> wrote:
> On Fri, 14 Jan 2005 18:01:25 -0200, Flávio Maldonado
> <[EMAIL PROTECTED]> wrote:
> > Hello...
> >
> > When I use this tags above, the Button works well, but the Link doesn't
> > work.
> >
> > <html:form action="/user">
> > <html:submit property="action"><bean:message
> > key="button.new"/></html:submit>
> > <html:link page="/user.do?action='button.new'">New</html:link>
>
> Try the following code below
>
> <%
> String message =
> org.apache.struts.taglib.TagUtils.getInstance().message(pageContext,
> org.apache.struts.Globals.MESSAGES_KEY,
> org.apache.struts.Globals.LOCALE_KEY,
> "button.new");
> pageContext.setAttribute("message", message);
> %>
>
> <html:link action="/user" paramId="action" paramName="message">New</html:link>
>
> With a LookupDispatchAction you should send the value for a key in the
> ApplicationResources.properties file and not the key as a request
> parameter
>
> > </html:form>
> >
> > At the first moment, both are putting the "button.new" into the action
> > variable.
> > When I press the button, works well. But I need that the link do the same
> > function of the button but I receive this error message when I try click on
> > the link:
> >
> > java.lang.NullPointerException
> > java.lang.Class.searchMethods(Class.java:1877)
> > java.lang.Class.getMethod0(Class.java:1901)
> > java.lang.Class.getMethod(Class.java:984)
> >
> > org.apache.struts.actions.DispatchAction.getMethod(DispatchAction.java:332)
> >
> > org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:264)
> >
> > org.apache.struts.actions.LookupDispatchAction.execute(LookupDispatchAction.java:234)
> >
> > org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:465)
> >
> > org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
> >
> > org.apache.struts.action.ActionServlet.process(ActionServlet.java:1422)
> > org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:505)
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
> >
> > I extend my Action from LookupDispatchAction, and I implement this method...
> >
> > protected Map getKeyMethodMap() {
> > Map map = new HashMap();
> > map.put("button.new", "newUser");
> > return map;
> > }
> >
> > With this mapping, I hope that the method above be executed...
> >
> > public ActionForward newUser(ActionMapping mapping, ActionForm form,
> > HttpServletRequest request, HttpServletResponse response){
> > return mapping.getInputForward();
> > }
> >
> > but it's not happening...
> >
> > Some body can Help-me?
> >
> > I'm sorry for my bad english... ;)
> >
> > Thanks...
> >
> > Flávio Vilasboas Maldonado
> > Diretor de Desenvolvimento
> > SedNet Soluções em TI
> > (35)3471-9381
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
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>
>
--
------------------------------
"You can lead a horse to water but you cannot make it float on its back."
~Dakota Jack~
"You can't wake a person who is pretending to be asleep."
~Native Proverb~
"Each man is good in His sight. It is not necessary for eagles to be crows."
~Hunkesni (Sitting Bull), Hunkpapa Sioux~
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