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  • One-to-many relationship with JDO in Google App Engine

    - by Marvin
    I've followed the GAE docs on setting up one-to-many relationship in JDO but I'm still having trouble in retrieving the collection data back. I have no problem getting the other non-collection fields back. Here are my classes: @PersistenceCapable public class User{ @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Key key; @Persistent private String uniqueId; @Persistent private String email; @Persistent private List<Address> addresses = new ArrayList<Address>() ; ... } @PersistenceCapable public class Phone{ @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Key key; @Persistent private String number; ... } public class UserDaoImpl implements UserDao { public void insertUser(User user) { if(user.getKey() == null) { com.google.appengine.api.datastore.Key key = KeyFactory.createKey(User.class.getSimpleName(), user.getEmail()); user.setKey(key); } PersistenceManager pm = PersistenceManagerWrapper.getPersistenceManager(); notNull(user); try { pm.makePersistent(user); } finally { pm.close(); } } @SuppressWarnings("unchecked") public User getUser(String uniqueId) { PersistenceManager pm = PersistenceManagerWrapper.getPersistenceManager(); Query query = pm.newQuery(User.class); query.setFilter("uniqueId == uniqueIdParam"); query.declareParameters("String uniqueIdParam"); User user = null; try { List<User> users = (List<User>)(query.execute(uniqueId)); //TODO abstract this if(users.size() > 0) user = users.get(0); } finally { pm.close(); } return user; } } public class UserDaoImplTest { @Test public void getUserTest() { User user = createTestUser(); assertNotNull("The user object should not be null", user); userDao.insertUser(user); User returnedUser = userDao.getUser(TEST_USER_ID); assertNotNull("The returnedUser object should not be null", returnedUser); Assert.assertPropertyEqualsExcludeProperties("User Object", user, returnedUser, ""); } } When I run the test, all the properties for User is populated but the list of Phone if I get is empty.

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  • Adding jQueryui Buttons to dynamically added content

    - by Hippyjim
    I have a list of items that have some jQueryUI buttons associated with them. After an action (deleting an item) I want to reload the list via ajax. Only problem is when I do so the JQueryUI buttons no longer show, just the standard markup. I know I can use jQuery.live() for dynamically adding click handlers etc, but how do I apply a jQueryUI button() to them?

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  • Cocoa: How to make table view draw custom views in each cell

    - by Inso Reiges
    Hello, I am learning Cocoa and trying to create an application for Mac that displays a simple book list. Each book is an NSView with its cover image, title and author. I want to present this list as a NSTableView with a single column and a book view in each cell. However i can't yet figure out how to display a custom view inside a table cell in interface builder or programmatically. Any tips would be very appreciated :) Inso.

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  • How to Fake a AsyncToken return in ActionScript 3

    - by Brett
    Using Parsley, I have a service that I access through a [Command(selector='list')] public function getRssFeed( msg:RssEvent ):AsyncToken { return service.list() as AsyncToken; } when I point to the "Real" RssService, everything works as expected. My problem is when I point to the "Mock" RssService. I can't figure out how to fake a AsyncToken with some dummy data return... does anyone knows how to do this ?

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  • Core Data - Breaking A Relationship

    - by Garry
    Hi, I have a Patient entity and a List entity. A Patient can belong to several different lists and a list can have several different patients. Say I have a patient who belongs to 3 lists (A, B, C). I want to remove the patient from lists A & B. I do not want to delete lists A & B themselves though obviously. How do I go about doing this?

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  • Why loading of analytics blocks site loading?

    - by HasanGursoy
    Stupid government of Turkey have blocked Google's some IPs which were used for YouTube and now we can't access services like: translate, analytics. And the problem is some web-sites do not load until ga.js returns a response or request timeout. Even sometimes I'm expecting slow loading on stackoverflow and page load never completes. How can I make this web sites load faster and skip Google analytics files?

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  • Binding class to ListView

    - by Neir0
    Hi, I have a class public class Foo { public List<string> list1 { get; set;} public List<string> list2 { get; set; } public string url; } and a ListView with two columns How i can to bind instance of Foo class to ListView?

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  • Regex to use each letter only once?

    - by gtcaz
    Is it possible to construct a PCRE-style regular expression that will only match each letter in a list only once? For example, if you have the letters "lrsa" and you try matching a word list against: ^[lrsa]*m[lrsa]*$ you're going to match "lams" (valid), but also "lamas" (invalid for our purposes because you only had one "a"). If your letter set was "lrsaa", you would want to match "lamas". Is this possible with regular expressions, or should I handle it programmatically?

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  • State machines in C#

    - by Sir Psycho
    Hi, I'm trying to work out what's going on with this code. I have two threads iterating over the range and I'm trying to understand what is happening when the second thread calls GetEnumerator(). This line in particular (T current = start;), seems to spawn a new 'instance' in this method by the second thread. Seeing that there is only one instance of the DateRange class, I'm trying to understand why this works. Thanks in advance. class Program { static void Main(string[] args) { var daterange = new DateRange(DateTime.Now, DateTime.Now.AddDays(10), new TimeSpan(24, 0, 0)); var ts1 = new ThreadStart(delegate { foreach (var date in daterange) { Console.WriteLine("Thread " + Thread.CurrentThread.ManagedThreadId + " " + date); } }); var ts2 = new ThreadStart(delegate { foreach (var date in daterange) { Console.WriteLine("Thread " + Thread.CurrentThread.ManagedThreadId + " " + date); } }); Thread t1 = new Thread(ts1); Thread t2 = new Thread(ts2); t1.Start(); Thread.Sleep(4000); t2.Start(); Console.Read(); } } public class DateRange : Range<DateTime> { public DateTime Start { get; private set; } public DateTime End { get; private set; } public TimeSpan SkipValue { get; private set; } public DateRange(DateTime start, DateTime end, TimeSpan skip) : base(start, end) { SkipValue = skip; } public override DateTime GetNextElement(DateTime current) { return current.Add(SkipValue); } } public abstract class Range<T> : IEnumerable<T> where T : IComparable<T> { readonly T start; readonly T end; public Range(T start, T end) { if (start.CompareTo(end) > 0) throw new ArgumentException("Start value greater than end value"); this.start = start; this.end = end; } public abstract T GetNextElement(T currentElement); public IEnumerator<T> GetEnumerator() { T current = start; do { Thread.Sleep(1000); yield return current; current = GetNextElement(current); } while (current.CompareTo(end) < 1); } System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { return GetEnumerator(); } }

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  • Best practices for resending to hard bounced emails after X days

    - by Vivian Hsu
    If I see an email returned due to a hard bounce, after how many days is it acceptable to resend to that email address. It is possible for emails to be reactivated or for temporary outages, so it doesn't make sense to keep an email in my hard bounce email list forever. I've already seen cases where I receive emails from addresses that were put in my hard bounce email list months ago. Any recommendations? Are there specific recommendations from ISPs?

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  • Changing the itemsSource of a treeview makes it's children invisible, when they were already display

    - by Marnix Kraus
    I found some strange problem in WPF, using the itemsSource of a treeview. I hope I can make this specific problem clear for you. First; a story. There is a treeview. It has a list with treeviewitems as itemsSource. This list is called _roots. There is another list, called _leafs. For as in a treeview, the _roots contain the _leafs in some hierarchical way. For example: <TreeviewItem Header="Jungle"> <TreeviewItem> <SpecialTreeviewItem Header="Monkey"/> <SpecialTreeviewItem Header="Apple"/> </TreeviewItem> </TreeviewItem> Now I am trying to switch between these two lists as itemsSource. It seemed to work fine, but it doesn't: When the Jungle-item is un-expanded, and I change the itemsSource to _leafs, and change it back again to _roots, everything works fine and all items can be expanded and showed. But when the Jungle-item is expanded (and the special items are already visible) and I change it to the _leafs itemsSource, and then change the itemsSource back to _roots, all special items have disappeared!! Also, when I do the same as case 2, but first un-expand the Jungle-item again, the special items also disappear. I did a lot of debugging, before posting this question here and come to the following conclusion: Printing on the event: visibility changed, the visibility is set to false for all items that were already visible (that is, when _roots become visible, the special items become invisible (because they were already visible)) So, IsVisible is false for the items, but Visibility = Visible. Which is a bit strange. The problem seems to depend on the use of the _roots list, which in a certain way contain the _leafs. When I change the itemsSource to different lists with special items in it, everything works fine. The hierarchical structure of the _roots make this thing broken. I hope that this is a complete overview of my problem. Help would be appreciated.

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  • How to perform group by in LINQ and get a Iqueryable or a Custom Class Object?

    - by VJ
    Here is my query - var data = Goaldata.GroupBy(c => c.GoalId).ToList(); This returns a Igrouping object and I want an Iqueryable object which I can directly query to get the data while in this case I have to loop through using a foreach() and then get the data. Is there another way to group by in LINQ which returns directly a list of Iqueryable or the a List as similar to what happens for order by in LINQ.

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  • Reading a file N lines at a time in ruby

    - by Sam
    I have a large file (hundreds of megs) that consists of filenames, one per line. I need to loop through the list of filenames, and fork off a process for each filename. I want a maximum of 8 forked processes at a time and I don't want to read the whole filename list into RAM at once. I'm not even sure where to begin, can anyone help me out?

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  • Add a click event to a listbox filled with objects in code

    - by djerry
    Hey guys, I'm trying to sho a contextmenu on right-click on an item in a listbox. So i'm binding a list of "Users" to my listbox. Then i'm a bit lost. I thought i could foreach the list and add a mouserightdown event on the listboxitems, but i can't figure out how. Is this a good way, or does anyone know a better way of accomplishing what i want. Thanks in advance.

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  • JDOM Parser and Namespace how to get clean Content

    - by senzacionale
    MY xml: <?xml version="1.0"?> <company xmlns="http://www.xx.com/xx"> <staff> <firstname>yong</firstname> <lastname>mook kim</lastname> <nickname>mkyong</nickname> <salary>100000</salary> </staff> <staff> <firstname>low</firstname> <lastname>yin fong</lastname> <nickname>fong fong</nickname> <salary>200000</salary> </staff> </company> Reader in = new StringReader(message); Document document = (Document)saxBuilder.build(in); Element rootNode = document.getRootElement(); List<?> list = rootNode.getChildren("staff", Namespace.getNamespace("xmlns="http://www.infonova.com/MediationFeed"")); XMLOutputter outp = new XMLOutputter(); outp.setFormat(Format.getCompactFormat()); for (int ii = 0; ii < list.size(); ii++) { Element node = (Element)list.get(ii); StringWriter sw = new StringWriter(); outp.output(node.getContent(), sw); StringBuffer sb = sw.getBuffer(); String xml = sb.toString(); } but my xml object looks like this <firstname xmlns="http://www.xx.com/xx">yong</firstname> <lastname xmlns="http://www.xx.com/xx">mook kim</lastname> <nickname xmlns="http://www.xx.com/xx">mkyong</nickname> <salary xmlns="http://www.xx.com/xx">100000</salary> every elemnt has namespace. why this? i don't want namespace... I want the same output as is in xml example like <firstname>yong</firstname> <lastname>mook kim</lastname> <nickname>mkyong</nickname> <salary>100000</salary>

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  • DirectShow Filter Graph Editor doesn't show remote graphs

    - by vucetica
    I have a problem with connecting to remote graph from DirectShow Filter Graph Editor. When I run application that creates a direct show graph, on my Windows XP machine graph is shown in the list of remote graphs, but on the Windows 7 (x64) machine list of remote graphs is empty. I have registered proppage.dll and also registered directshowspy.dll ... but still no results. Any ideas?

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  • What is the correct response for web service?

    - by Eric
    One of my web services returns the list of ids of the the projects a person is owner of. That is, when I GET http://example.com/wsListProjects?user=eric I get back xml with the list of projects. However, when I specify user=xxx, who doesn't exist, I currently return a 404 response? Is this the correct response to return? Thanks.

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  • Class hierarchy problem (with generic's variance!)

    - by devoured elysium
    The problem: class StatesChain : IState, IHasStateList { private TasksChain tasks = new TasksChain(); ... public IList<IState> States { get { return _taskChain.Tasks; } } IList<ITask> IHasTasksCollection.Tasks { get { return _taskChain.Tasks; } <-- ERROR! You can't do this in C#! I want to return an IList<ITask> from an IList<IStates>. } } Assuming the IList returned will be read-only, I know that what I'm trying to achieve is safe (or is it not?). Is there any way I can accomplish what I'm trying? I wouldn't want to try to implement myself the TasksChain algorithm (again!), as it would be error prone and would lead to code duplication. Maybe I could just define an abstract Chain and then implement both TasksChain and StatesChain from there? Or maybe implementing a Chain<T> class? How would you approach this situation? The Details: I have defined an ITask interface: public interface ITask { bool Run(); ITask FailureTask { get; } } and a IState interface that inherits from ITask: public interface IState : ITask { IState FailureState { get; } } I have also defined an IHasTasksList interface: interface IHasTasksList { List<Tasks> Tasks { get; } } and an IHasStatesList: interface IHasTasksList { List<Tasks> States { get; } } Now, I have defined a TasksChain, that is a class that has some code logic that will manipulate a chain of tasks (beware that TasksChain is itself a kind of ITask!): class TasksChain : ITask, IHasTasksList { IList<ITask> tasks = new List<ITask>(); ... public List<ITask> Tasks { get { return _tasks; } } ... } I am implementing a State the following way: public class State : IState { private readonly TaskChain _taskChain = new TaskChain(); public State(Precondition precondition, Execution execution) { _taskChain.Tasks.Add(precondition); _taskChain.Tasks.Add(execution); } public bool Run() { return _taskChain.Run(); } public IState FailureState { get { return (IState)_taskChain.Tasks[0].FailureTask; } } ITask ITask.FailureTask { get { return FailureState; } } } which, as you can see, makes use of explicit interface implementations to "hide" FailureTask and instead show FailureState property. The problem comes from the fact that I also want to define a StatesChain, that inherits both from IState and IHasStateList (and that also imples ITask and IHasTaskList, implemented as explicit interfaces) and I want it to also hide IHasTaskList's Tasks and only show IHasStateList's States. (What is contained in "The problem" section should really be after this, but I thought puting it first would be way more reader friendly). (pff..long text) Thanks!

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  • siftware to manage applications within business.

    - by Richard Friend
    Hi I have been tasked to either find an off the shelf solution or to build inhouse some software that can maintain a list of all of the applications within our business, assign them to the different business areas that use them and list all the servers, documents, knowledge base etc that relate to the app in question. Does anyone know of any existing software that can do this ? Regards

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  • How to render an object tree with paging?

    - by erikzeta
    I’ll render an object graph on a page looking like this: Category 1 Module 1 Product 1 Product 2 Product 3 Module 2 Product 4 Category 2 ... The Category has an IList<Module and the Module contains an IList<Product Now I need to implement paging on this structure but the problem is that I can’t do Category.Skip(page * pageSize).Take(pageSize) because this will only work on the Category object not the whole object tree. In other words I like to render out when the sum of Categories, Modules and Products is equal to the PageSize /erik

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