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  • Google Collections sources don't compile

    - by Carl Rosenberger
    I just downloaded the Google Collections sources and imported them into a new Eclipse project with JDK 1.6. They don't compile for a couple of reasons: javax.annotation.Nullable can not be found javax.annotation.ParametersAreNonnullByDefault can not be found Cannot reduce the visibility of the inherited method #createCollection() from AbstractMultimap + 11 similar ones Name clash: The method forcePut(K, V) of type AbstractBiMap has the same erasure as forcePut(Object, Object) of type BiMap but does not override it + 2 similar ones What am I missing? I also wonder if unit tests for these collections are available to the public.

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  • Double Buffering for Game objects, what's a nice clean generic C++ way?

    - by Gary
    This is in C++. So, I'm starting from scratch writing a game engine for fun and learning from the ground up. One of the ideas I want to implement is to have game object state (a struct) be double-buffered. For instance, I can have subsystems updating the new game object data while a render thread is rendering from the old data by guaranteeing there is a consistent state stored within the game object (the data from last time). After rendering of old and updating of new is finished, I can swap buffers and do it again. Question is, what's a good forward-looking and generic OOP way to expose this to my classes while trying to hide implementation details as much as possible? Would like to know your thoughts and considerations. I was thinking operator overloading could be used, but how do I overload assign for a templated class's member within my buffer class? for instance, I think this is an example of what I want: doublebuffer<Vector3> data; data.x=5; //would write to the member x within the new buffer int a=data.x; //would read from the old buffer's x member data.x+=1; //I guess this shouldn't be allowed If this is possible, I could choose to enable or disable double-buffering structs without changing much code. This is what I was considering: template <class T> class doublebuffer{ T T1; T T2; T * current=T1; T * old=T2; public: doublebuffer(); ~doublebuffer(); void swap(); operator=()?... }; and a game object would be like this: struct MyObjectData{ int x; float afloat; } class MyObject: public Node { doublebuffer<MyObjectData> data; functions... } What I have right now is functions that return pointers to the old and new buffer, and I guess any classes that use them have to be aware of this. Is there a better way?

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  • Silverlight Player Blank When Changing ism file

    - by Al Katawazi
    I am trying to get silverlight smooth streaming going on a site I am bilding and it works fine with the big buck bunny sample code which looks like this: <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%" id="Object2"> <param name="source" value="SmoothStreamingBlackGlass.xap"/> <param name="onerror" value="onSilverlightError" /> <param name="initparams"value='autoplay=False,muted=False,stretchmode=0,displaytimecode=False, playlist=<playList><playListItems><playListItem title="Big%20Buck%20Bunny" description="" mediaSource="Big%20Buck%20Bunny.ism/Manifest" adaptiveStreaming="True" thumbSource="Big%20Buck%20Bunny_Thumb.jpg" frameRate="24.0000384000614" ></playListItem></playListItems></playList>' /> <a href="http://go2.microsoft.com/fwlink/?LinkID=124807" style="text-decoration: none;"><img src="http://go2.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" style="border-style: none" /></a> </object> <iframe style="visibility:hidden;height:0;width:0;border:0px"></iframe> but if i change the code like this i only get a blank area when the page is rendered instead of the movie clip. <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%" id="Object2"> <param name="source" value="SmoothStreamingBlackGlass.xap"/> <param name="onerror" value="onSilverlightError" /> <param name="initparams"value='autoplay=False,muted=False,stretchmode=0,displaytimecode=False, playlist=<playList><playListItems><playListItem title="Robotica_1080" description="" mediaSource="Robotica_1080.ism/Manifest" adaptiveStreaming="True" thumbSource="Robotica_1080_Thumb.jpg" frameRate="24.0000384000614" ></playListItem></playListItems></playList>' /> <a href="http://go2.microsoft.com/fwlink/?LinkID=124807" style="text-decoration: none;"><img src="http://go2.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" style="border-style: none" /></a> </object> <iframe style="visibility:hidden;height:0;width:0;border:0px"></iframe> Any ideas? I am using Encoder 3 to do the encoding set on microsoft smooth streaming for 720p with all the default settings.

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  • How do you delete rows from UITableView?

    - by James
    This has been bugging me for hours now and i have not been able to figure it out. I am importing data into a tableview using core data and NSMutableArray. As shown below. CORE DATA ARRAY NSMutableArray *mutableFetchResults = [CoreDataHelper getObjectsFromContext:@"Spot" :@"Name" :YES :managedObjectContext]; self.entityArray = mutableFetchResults; TABLE VIEW - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSManagedObject *object = (NSManagedObject *)[entityArray objectAtIndex:indexPath.row]; NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; } NSString *lat1 = [object valueForKey:@"Email"]; //NSLog(@"Current Spot Latitude:%@",lat1); float lat2 = [lat1 floatValue]; //NSLog(@"Current Spot Latitude Float:%g", lat2); NSString *long1 = [object valueForKey:@"Description"]; //NSLog(@"Current Spot Longitude:%@",long1); float long2 = [long1 floatValue]; //NSLog(@"Current Spot Longitude Float:%g", long2); //Getting current location from NSDictionary CoreDataTestAppDelegate *appDelegate = (CoreDataTestAppDelegate *) [[UIApplication sharedApplication] delegate]; NSString *locLat = [NSString stringWithFormat:appDelegate.latitude]; float locLat2 = [locLat floatValue]; //NSLog(@"Lat: %g",locLat2); NSString *locLong = [NSString stringWithFormat:appDelegate.longitude]; float locLong2 = [locLong floatValue]; //NSLog(@"Long: %g",locLong2); //Distance Shizzle //Prime's Location CLLocation *loc1 = [[CLLocation alloc] initWithLatitude:lat2 longitude:long2]; //Home Location CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:locLat2 longitude:locLong2]; double distance = [loc1 getDistanceFrom: loc2] / 1000; int myInt = (int)(distance + (distance>0 ? 0.5 : -0.5)); //NSLog(@"INT VAL :%i", myInt); NSMutableString* converted = [NSMutableString stringWithFormat:@"%.1f", distance]; [converted appendString: @" Km"]; //NSLog(@"Distance between Prime and home = %g", converted); if (myInt < 11) { cell.textLabel.text = [object valueForKey:@"Name"]; cell.detailTextLabel.text = [NSString stringWithFormat:converted]; } else { } // Configure the cell... return cell; } I am trying to get the table only to display results that are within a certain distance. This method here works apart from the fact that the results over a certain distance are still in the table, they are just not graphically visible. I am led to believe that i have to carry out the filtering process before the formatting the table but i can not seem to do this. Please help. My xcode skills are not brilliant so code suggestions would be helpfull.

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  • Crash in OS X Core Data Utility Tutorial

    - by vinogradov
    I'm trying to follow Apple's Core Data utility Tutorial. It was all going nicely, until... The tutorial uses a custom sub-class of NSManagedObject, called 'Run'. Run.h looks like this: #import <Foundation/Foundation.h> #import <CoreData/CoreData.h> @interface Run : NSManagedObject { NSInteger processID; } @property (retain) NSDate *date; @property (retain) NSDate *primitiveDate; @property NSInteger processID; @end Now, in Run.m we have an accessor method for the processID variable: - (void)setProcessID:(int)newProcessID { [self willChangeValueForKey:@"processID"]; processID = newProcessID; [self didChangeValueForKey:@"processID"]; } In main.m, we use functions to set up a managed object model and context, instantiate an entity called run, and add it to the context. We then get the current NSprocessInfo, in preparation for setting the processID of the run object. NSManagedObjectContext *moc = managedObjectContext(); NSEntityDescription *runEntity = [[mom entitiesByName] objectForKey:@"Run"]; Run *run = [[Run alloc] initWithEntity:runEntity insertIntoManagedObjectContext:moc]; NSProcessInfo *processInfo = [NSProcessInfo processInfo]; Next, we try to call the accessor method defined in Run.m to set the value of processID: [run setProcessID:[processInfo processIdentifier]]; And that's where it's crashing. The object run seems to exist (I can see it in the debugger), so I don't think I'm messaging nil; on the other hand, it doesn't look like the setProcessID: message is actually being received. I'm obviously still learning this stuff (that's what tutorials are for, right?), and I'm probably doing something really stupid. However, any help or suggestions would be gratefully received! ===MORE INFORMATION=== Following up on Jeremy's suggestions: The processID attribute in the model is set up like this: NSAttributeDescription *idAttribute = [[NSAttributeDescription alloc]init]; [idAttribute setName:@"processID"]; [idAttribute setAttributeType:NSInteger32AttributeType]; [idAttribute setOptional:NO]; [idAttribute setDefaultValue:[NSNumber numberWithInteger:-1]]; which seems a little odd; we are defining it as a scalar type, and then giving it an NSNumber object as its default value. In the associated class, Run, processID is defined as an NSInteger. Still, this should be OK - it's all copied directly from the tutorial. It seems to me that the problem is probably in there somewhere. By the way, the getter method for processID is defined like this: - (int)processID { [self willAccessValueForKey:@"processID"]; NSInteger pid = processID; [self didAccessValueForKey:@"processID"]; return pid; } and this method works fine; it accesses and unpacks the default int value of processID (-1). Thanks for the help so far!

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  • EJB failure to update datamodel

    - by Ignacio
    Here my EJB @Entity @Table(name = "modelos") @NamedQueries({ @NamedQuery(name = "Modelos.findAll", query = "SELECT m FROM Modelos m"), @NamedQuery(name = "Modelos.findById", query = "SELECT m FROM Modelos m WHERE m.id = :id"), @NamedQuery(name = "Modelos.findByDescripcion", query = "SELECT m FROM Modelos m WHERE m.descripcion = :descripcion")}) public class Modelos implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Basic(optional = false) @Column(name = "id") private Integer id; @Basic(optional = false) @Column(name = "descripcion") private String descripcion; @OneToMany(cascade = CascadeType.ALL, mappedBy = "idModelo") private Collection produtosCollection; @JoinColumn(name = "id_marca", referencedColumnName = "id") @ManyToOne(optional = false) private Marcas idMarca; public Modelos() { } public Modelos(Integer id) { this.id = id; } public Modelos(Integer id, String descripcion) { this.id = id; this.descripcion = descripcion; } public Modelos(Integer id, Marcas idMarca) { this.id = id; this.idMarca = idMarca; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getDescripcion() { return descripcion; } public void setDescripcion(String descripcion) { this.descripcion = descripcion; } public Collection<Produtos> getProdutosCollection() { return produtosCollection; } public void setProdutosCollection(Collection<Produtos> produtosCollection) { this.produtosCollection = produtosCollection; } public Marcas getIdMarca() { return idMarca; } public void setIdMarca(Marcas idMarca) { this.idMarca = idMarca; } @Override public int hashCode() { int hash = 0; hash += (id != null ? id.hashCode() : 0); return hash; } @Override public boolean equals(Object object) { // TODO: Warning - this method won't work in the case the id fields are not set if (!(object instanceof Modelos)) { return false; } Modelos other = (Modelos) object; if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) { return false; } return true; } @Override public String toString() { return "" + descripcion + ""; } } And the method accesing from the Modelosfacade public List findByMarcas(Marcas idMarca){ return em.createQuery("SELECT id, descripcion FROM Modelos WHERE idMarca = "+idMarca.getId()+"").getResultList(); } And the calling method from the controller public String createByMarcas() { //recreateModel(); items = new ListDataModel(ejbFacade.findByMarcas(current.getIdMarca())); updateCurrentItem(); System.out.println(current.getIdMarca()); return "List"; } I do not understand why I keep falling in an EJB exception.

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  • Getting all the fields and properties of a custom attribute from a specific instance

    - by Gbps
    I have a custom attribute PackerAttrib which takes no data, simply marking a field or property, which will be used to mark a property or field of a class inherited from Panel in order to serialize it later on. How would I take an instance of any object derived from Panel and get a Directory<string s, object o> where s is the name of the field or property and o is the current value of said field or property from the instance. Thank you, don't be afraid to ask me to clarify!

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  • Support for encoding query string or POST data in YUI ?

    - by faB
    How do you encode a javascript object/hash (pairs of properties and values) into a URL-encoded query string with YUI (2.7.0 or 3.0.0 Beta) ? I want to do the equivalent of Object.toQueryString() from Prototype: I need this to encode parameters for GET and POST requests with YAHOO.util.Connect. It turns out YAHOO.util.Connect has a setForm() method to serialize a form but that still leaves me out cold to encode parameters for GET requests, or the 4th parameter of YAHOO.util.Connect.asyncRequest() to pass post data.

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  • which is the most accurate way to check variables type javascript

    - by mck89
    Hi, i need to check the type of a variable in javascript, i know 3 ways to do it: instanceof operator: if(a instanceof Function) typeof operator: if(typeof a=="function" toString method (jQuery uses this): Object.prototype.toString.call(a) == "[object Function]" Which is the most accurate way to do type checking beetween these solutions? and why? Please don't tell me that the last solution is better only because jQuery uses that.

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  • C# and com for vb6

    - by Jim
    Hi all I have an issue with C# and COM. :( [Guid("f7d936ba-d816-48d2-9bfc-c18be6873b4d")] [ComVisible(true)] [ClassInterface(ClassInterfaceType.None)] public class Process : IProcess { public Process() { } public int UpdateBalance(string accountNumber, string adminEventDescription, decimal curAmount) { return 10; } } [ComVisible(true)] [Guid("5c640a0f-0dce-47d4-87df-07cee3b9a1f9")] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] public interface IProcess { int UpdateBalance(string accountNumber, string adminEventDescription, decimal curAmount); } And the VB code Private Sub Command1_Click() Dim test As Object Set test = New Forwardslash_PlayerTrackingSystem_Api.Process End Sub I get the following ActiveX component can't create object?

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  • How to read attachment messages without using scriptlets in JSP?

    - by Stardust
    Hi, I want to know how can I read attachment messages without using scriplets in JSP? After getting Message object as an attribute by using request object from servlets, how can I confirm whether Message content is an instance of Multipart or not without using scriplets like: if(message.getContent() instanceOf Multipart) How can I read the content of any file by using EL in JSP? As I can't see any getRead method in inputStream subclass.

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  • readObject() vs. readResolve() to restore transient fields

    - by Joonas Pulakka
    According to Serializable javadoc, readResolve() is intended for replacing an object read from the stream. But is it OK to use it for restoring transient fields, like so: private Object readResolve() { transientField = something; return this; } as opposed to using readObject(): private void readObject(ObjectInputStream s) { s.defaultReadObject(); transientField = something; } Is there any reason to choose one over other, when used to just restore transient fields?

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  • why retain of delegate is wrong what are all alternatives...?

    - by jeeva
    Hi, I have one problem let assume A and B are 2 view controller from A user push to B view controller,In B user starts some download by creating object C(which is NSObject class) and sets B as delegate to C(assign),now user want go back to A then dealloc of B calls object releases, C delegate fails to give call back(crashes).I want to get call and allow user to move to other view controller thats way i am retain the delegate in C class but retain of delegate is wrong ... what are all solutions ... Thanks in Advance.

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  • Invoke does not exist in the current context?

    - by Pawan Kumar
    Invoke does not exist in the current context. The same method was not giving any error in Form.cs class but when I used in other class in same project it gives error. i am using threading on forms control. private void UpdateText(object fileName) { if (Textbox.InvokeRequired) { UpdateTextCallback back = new UpdateTextCallback(UpdateText); this.Invoke(back, new object[] { fileName }); } }

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  • How to copy DispatcherObject (BitmapSource) into different thread?

    - by Tomáš Kafka
    Hi, I am trying to figure out how can I copy DispatcherObject (in my case BitmapSource) into another thread. Use case: I have a WPF app that needs to show window in a new thread (the app is actually Outlook addin and we need to do this because Outlook has some hooks in the main UI thread and is stealing certain hotkeys that we need to use - 'lost in translation' in interop of Outlook, WPF (which we use for UI), and Winforms (we need to use certain microsoft-provided winforms controls)). With that, I have my implementation of WPFMessageBox, that is configured by setting some static properties - and and one of them is BitmapSource for icon. This is used so that in startup I can set WPFMessageBox.Icon once, and since then, every WPFMessageBox will have the same icon. The problem is that BitmapSource, which is assigned into icon, is a DispatcherObject, and when read, it will throw InvalidOperationException: "The calling thread cannot access this object because a different thread owns it.". How can I clone that BitmapSource into the actual thread? It has Clone() and CloneCurrentValue() methods, which don't work (they throw the same exception as well). It also occured to me to use originalIcon.Dispatcher.Invoke( do the cloning here ) - but the BitmapSource's Dispatcher is null, and still - I'd create a copy on a wrong thread and still couldnt use it on mine. BitmapSource.IsFrozen == true. Any idea on how to copy the BitmapSource into different thread (without completely reconstructing it from an image file in a new thread)? EDIT: So, freezing does not help: In the end I have a BitmapFrame (Window.Icon doesn't take any other kind of ImageSource anyway), and when I assign it as a Window.Icon on a different thread, even if frozen, I get InvalidOperationException: "The calling thread cannot access this object because a different thread owns it." with a following stack trace: WindowsBase.dll!System.Windows.Threading.Dispatcher.VerifyAccess() + 0x4a bytes WindowsBase.dll!System.Windows.Threading.DispatcherObject.VerifyAccess() + 0xc bytes PresentationCore.dll!System.Windows.Media.Imaging.BitmapDecoder.Frames.get() + 0xe bytes PresentationFramework.dll!MS.Internal.AppModel.IconHelper.GetIconHandlesFromBitmapFrame(object callingObj = {WPFControls.WPFMBox.WpfMessageBoxWindow: header}, System.Windows.Media.Imaging.BitmapFrame bf = {System.Windows.Media.Imaging.BitmapFrameDecode}, ref MS.Win32.NativeMethods.IconHandle largeIconHandle = {MS.Win32.NativeMethods.IconHandle}, ref MS.Win32.NativeMethods.IconHandle smallIconHandle = {MS.Win32.NativeMethods.IconHandle}) + 0x3b bytes > PresentationFramework.dll!System.Windows.Window.UpdateIcon() + 0x118 bytes PresentationFramework.dll!System.Windows.Window.SetupInitialState(double requestedTop = NaN, double requestedLeft = NaN, double requestedWidth = 560.0, double requestedHeight = NaN) + 0x8a bytes PresentationFramework.dll!System.Windows.Window.CreateSourceWindowImpl() + 0x19b bytes PresentationFramework.dll!System.Windows.Window.SafeCreateWindow() + 0x29 bytes PresentationFramework.dll!System.Windows.Window.ShowHelper(object booleanBox) + 0x81 bytes PresentationFramework.dll!System.Windows.Window.Show() + 0x48 bytes PresentationFramework.dll!System.Windows.Window.ShowDialog() + 0x29f bytes WPFControls.dll!WPFControls.WPFMBox.WpfMessageBox.ShowDialog(System.Windows.Window owner = {WPFControlsTest.MainWindow}) Line 185 + 0x10 bytes C#

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  • Java Apache Commons users

    - by Tom Brito
    Is there anything in apache commons to convert a Object to byte array, like the following method does? public static byte[] toByteArray(Object obj) throws IOException { ByteArrayOutputStream baos = new ByteArrayOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(baos); oos.writeObject(obj); oos.flush(); byte[] data = baos.toByteArray(); return data; } [try-finally block closing buffers were omitted to simplify]

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  • about sending messages among bg.html, popup.html and contentscript.js

    - by T_t
    Hi!:) In my extension, when a button named "mybutton1" in the popup.html is clicked, it sends a message "getvar1" to the contentscript.js, then the contentscript.js sends a message "i want var1" to the background.html to get an object named "var1".If the button named "mybutton2" is clicked, the contentscript.js gets the "var2" object. How should i do under this condition? What's more, i am a little confused about the chrome.extension.onRequest.addListener method and chrome.extension.sendRequest method.Could someone tell me the mechanism of the two methods? Thanks!

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  • Drawing translucent bitmaps using Canvas (Android)

    - by mcbitmap
    I have a Bitmap object and want to render it to a Canvas object with varying levels of translucency (i.e. make the whole bitmap partially see through). For example, I have sprites in a game (that are drawn over the top of a bitmap background) that I want to fade out from being opaque to being invisible. Can I do this without having to resort to OpenGL?

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  • Can you preload images in a dojo animation.

    - by asynchronous-challenged
    I have a dojo animation object of about 15 images. I'm also using dojo.fx.chain to link them all together. Right before I create all my dojo.fadeIn's and dojo.fadeOut's I added in some basic javascript to preload each image. My question is: Am I doing this the hard way or is there some function/attr I can set in the animation object to do this?

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  • Performance tuning of a Hibernate+Spring+MySQL project operation that stores images uploaded by user

    - by Umar
    Hi I am working on a web project that is Spring+Hibernate+MySQL based. I am stuck at a point where I have to store images uploaded by a user into the database. Although I have written some code that works well for now, but I believe that things will mess up when the project would go live. Here's my domain class that carries the image bytes: @Entity public class Picture implements java.io.Serializable{ long id; byte[] data; ... // getters and setters } And here's my controller that saves the file on submit: public class PictureUploadFormController extends AbstractBaseFormController{ ... protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command, BindException errors) throws Exception{ MutlipartFile file; // getting MultipartFile from the command object ... // beginning hibernate transaction ... Picture p=new Picture(); p.setData(file.getBytes()); pictureDAO.makePersistent(p); // this method simply calls getSession().saveOrUpdate(p) // committing hiernate transaction ... } ... } Obviously a bad piece of code. Is there anyway I could use InputStream or Blob to save the data, instead of first loading all the bytes from the user into the memory and then pushing them into the database? I did some research on hibernate's support for Blob, and found this in Hibernate In Action book: java.sql.Blob and java.sql.Clob are the most efficient way to handle large objects in Java. Unfortunately, an instance of Blob or Clob is only useable until the JDBC transaction completes. So if your persistent class defines a property of java.sql.Clob or java.sql.Blob (not a good idea anyway), you’ll be restricted in how instances of the class may be used. In particular, you won’t be able to use instances of that class as detached objects. Furthermore, many JDBC drivers don’t feature working support for java.sql.Blob and java.sql.Clob. Therefore, it makes more sense to map large objects using the binary or text mapping type, assuming retrieval of the entire large object into memory isn’t a performance killer. Note you can find up-to-date design patterns and tips for large object usage on the Hibernate website, with tricks for particular platforms. Now apparently the Blob cannot be used, as it is not a good idea anyway, what else could be used to improve the performance? I couldn't find any up-to-date design pattern or any useful information on Hibernate website. So any help/recommendations from stackoverflowers will be much appreciated. Thanks

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  • Coloring NSTableView Text per row

    - by Tristan
    I have a NSTableView that is displaying an array of objects I have. For each of these objects (rows) I would like to change the color of the text displayed depending on the results of a function I run on each object; So for example all the object in the table that exist in another list (or some other requirement) I want to display them in green text, and objects that don't exist display in red. How would I go about doing this?

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