Hi Kevin
You have to use a && operator when you test if your string is not null and
length > 0. ;-)
Bad copy/paste I guess.
Your code is clean.
Philippe
Sent from my iPhone
On 4 déc. 2011, at 09:01, Kevin Spake <sparky0...@yahoo.com> wrote:
> Still working on the WebObjects, WOlips and Wonder tutorial, part 2...
>
> Getting a null pointer exception. I've spent hours trying to figure out the
> issue, but I just don't have the experience to properly trouble shoot it. The
> stack trace is below, and below that is the code for my DirectAction. The
> console says the error occurs on line 55, which is "if (errorMessage != null
> || errorMessage.length() != 0) { "
>
> The thing is, errorMessage is null at this point. I've entered in valid user
> credentials, the session object has been created. The currentUser and
> nextPage objects are not null. nextPage is set to "AdminPage". As soon as
> I try to step into the "if (errorMessage != null || errorMessage.length() !=
> 0) {" line the exception occurs. Is this a scope issue?
>
> Thanks.
>
>
> Application: SooperSeekrit Error: java.lang.NullPointerException Reason:
> Stack trace:
> File Line# Method Package
> DirectAction.java 55 loginAction com.sooperseekrit.app
> NativeMethodAccessorImpl.java NA invoke0 sun.reflect
> NativeMethodAccessorImpl.java 39 invoke sun.reflect
> DelegatingMethodAccessorImpl.java 25 invoke sun.reflect
> Method.java 597 invoke java.lang.reflect
> WODirectAction.java 144 performActionNamed com.webobjects.appserver
> ERXDirectAction.java 401 performActionNamed er.extensions.appserver
> WOActionRequestHandler.java 259 _handleRequest
> com.webobjects.appserver._private
> WOActionRequestHandler.java 158 handleRequest
> com.webobjects.appserver._private
> ERXDirectActionRequestHandler.java 126 handleRequest
> er.extensions.appserver
> WOApplication.java 1687 dispatchRequest com.webobjects.appserver
> ERXApplication.java 2021 dispatchRequestImmediately
> er.extensions.appserver
> ERXApplication.java 1986 dispatchRequest er.extensions.appserver
> WOWorkerThread.java 144 runOnce com.webobjects.appserver._private
> WOWorkerThread.java 226 run com.webobjects.appserver._private
> Thread.java 680 run java.lang
>
>
>
>
>
> package com.sooperseekrit.app;
>
> import java.util.NoSuchElementException;
>
> import com.webobjects.appserver.WOActionResults;
> import com.webobjects.appserver.WOComponent;
> import com.webobjects.appserver.WORequest;
> import com.webobjects.eocontrol.EOQualifier;
>
> import er.extensions.appserver.ERXDirectAction;
> import er.extensions.eof.ERXEC;
>
> import com.sooperseekrit.components.AdminPage;
> import com.sooperseekrit.components.Main;
> import com.sooperseekrit.components.UserPage;
> import com.sooperseekrit.model.User;
>
> public class DirectAction extends ERXDirectAction {
> public DirectAction(WORequest request) {
> super(request);
> }
>
>
> @Override
> public WOActionResults defaultAction() {
> return pageWithName(Main.class.getName());
> }
>
> public WOActionResults loginAction() {
>
> WOComponent nextPage = null;
> String username = request().stringFormValueForKey("username");
> String password = request().stringFormValueForKey("password");
> String errorMessage = null;
> if (username == null || username.length() == 0 ||
> password == null || password.length() == 0) {
> errorMessage = "Please enter a username and password";
> } else {
> try {
> EOQualifier qual =
> User.USERNAME.eq(username).and(User.PASSWORD.eq(password));
> User user =
> User.fetchRequiredUser(ERXEC.newEditingContext(), qual);
> ((Session)session()).set_currentUser(user);
> if (user.group().name().equals("Admin")) {
> nextPage =
> pageWithName(AdminPage.class.getName());
> } else if (user.group().name().equals("User")) {
> nextPage =
> pageWithName(UserPage.class.getName());
> }
> } catch (NoSuchElementException e) {
> errorMessage = "No user found for those
> credentials";
> } catch (Exception e) {
> // something bad happened
> }
> }
>
> if (errorMessage != null || errorMessage.length() != 0) {
> nextPage = pageWithName(Main.class.getName());
> nextPage.takeValueForKey(errorMessage, "errorMessage");
> nextPage.takeValueForKey(username, "username");
> nextPage.takeValueForKey(password, "password");
> }
>
> return nextPage;
> }
> }
>
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