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• Applet problem with IPlanet and Firefox (class not found)

  - by JB Hurteaux

  I have an applet which loads nicely when accessed locally (both IE and Firefox). However, when I put my webpage in a webserver (local IPlanet), it refuses to load on Firefox (but still fine on IE). I get the following error in the java console: load: class XXX.localprinting.LocalPrintingApplet.class not found. java.lang.ClassNotFoundException: XXX.localprinting.LocalPrintingApplet.class at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source) at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source) at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.io.IOException: open HTTP connection failed:https://XXX/test/XXX/localprinting/LocalPrintingApplet/class.class at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source) at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source) at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) ... 7 more Exception: java.lang.ClassNotFoundException: XXX.localprinting.LocalPrintingApplet.class Any idea what could explain the different behavior in the webserver? I researched the issue of "class not found" already but without finding something relevant.

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• Question About Abstract Classes?

  - by IbrarMumtaz

  URL: Link (1) According to this wesbite .. you cannot implement Abstract classes but derive from them. This makes sense and I have read this many times. Like an interface, you cannot implement an instance of an abstract class, however you can implement methods, fields, and properties in the abstract class that can be used by the child class. But on MSDN URL: TextWriter CLass on MSDN TextWriter is an abstract class but it has two constructors defined ... and according to the MS 70-536 book, the following statement is valid: TextWriter tw = new File.CreateText("myFile.Txt") The static file class and it's CreateText method is fine by me as I have studied it on MSDN but can somebody explain this little contradiction I have found? Surely I am not the first? Why is instantaion of base abstract classes possible????

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• Address calling class

  - by Samuel

  I have an abstract class Moveable with the method abstract void move() which is extended by the class Bullet and the abstract class Character, and Character is extended by the class Survivor and the class Zombie. In Survivor and Bullet the move() method doesnt require any parameters while in the class Zombie the move() method depends on the actual position of the survivor. The survivor and multiple zombies are created in the class Gui. I wanted to access the survivor in Zombie - what's the best way of doing this? In Gui i wrote a method getSurvivor() but i don't see how to access this method in Zombie? I am aware that as a workaround i could just pass a [Survivor survivor] as parameter in move() and ignore it in Bullet and Survivor, but that feels so ... bad practice.

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• LInq to SQL - Partial Class - C#

  - by Mark Comix

  Hi, I have a system with 2 different projects, one is called LINQ_Extensions and the other is ORM_Linq. On ORM_Linq i have the LINQ diagram with the SQL tables "converted" in clases. One of the Class is called "Tipos_Pago" In the other project i have another class (partial class) "Tipos_Pago". I want to use the method OnValidate to validate the properties include in the class "Tipos_Pago", so i create this partial class. In the 2 projects i put the same NameSpace "ORM_Linq"(I changed the NameSpace of the project "LINQ_Extensions" to have the same of the project "ORM_Linq") After those chages, Visual Studio give me this error: Error 1 No defining declaration found for implementing declaration of partial method 'ORM_Linq.Tipos_Pago.OnValidate(System.Data.Linq.ChangeAction)' C..\Tipos_Pago.cs 13 22 Extensiones_Linq I don't have any Idea of what happend, can someone help me? Thanks, sorry for my poor english This is the code in the partial class: namespace ORM_Linq { public partial class Tipos_Pago { partial void OnValidate(System.Data.Linq.ChangeAction action) { //Valid code } } }

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• Error Instantiating an Inner Class in Parent's Constructor...

  - by stormin986

  In my application's main class (subclass of Application), I have a public inner class that simply contains 3 public string objects. In the parent class I declare an object of that inner class. public class MainApplication extends Application { public class Data { public String x; public String y; public String z; } private Data data; MainApplication() { data = new Data() data.x = "String"; } } After I instantiate the object in the constructor, I get a runtime error when I try to assign any of the inner class object's variables. Any idea what's up here??

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• jQuery .closest returns undefined

  - by Andy Holmes

  I've got the code below which works fine, however the jquery to add the items doesnt find the data-parent-room value and just returns undefined. This is the only thing not working :( HTML: <div id="inventoryRooms"> <!--BOX SHART--> <div class="widget box formHolder" data-parent-room="1"> <!--ROOM NAME--> <form class="widget-header rooms"> <input type="text" placeholder="Type Room name" name="roomName[]" class="form-input add-room-input input-width-xxlarge"> <input type="hidden" class="roomId" name="roomId[]"> <input type="hidden" class="inventoryId" name="inventoryId[]" value="<?=$_GET['inventory_id']?>"> <div class="toolbar no-padding"> <div class="btn-group"> <span class="btn saveRoom"><i class="icon-ok"></i> Save Room</span> </div> </div> </form> <!--/END--> <!--GENERIC ROW TITLES--> <div class="widget-header header-margin hide"> <div class="row row-title"> <div class="col-md-3"><h5>ITEM</h5></div> <div class="col-md-3"><h5>DESCRIPTION</h5></div> <div class="col-md-3"><h5>CONDITION</h5></div> <div class="col-md-2"><h5>PHOTOGRAPH</h5></div> <div class="col-md-1 align-center"><h5><i class="icon-cog"> </i></h5></div> </div> </div> <!--/END--> <!--ADD ITEM--> <div class="items"> </div> <!--/END--> <div class="toolbar-small"> <div class="btn-group"> <span class="btn addItem"><i class="icon-plus"></i> Add Item</span> <span data-toggle="dropdown" class="btn dropdown-toggle"><i class="icon-gear"></i> Options<span class="button-space"></span><i class="icon-angle-down"></i></span> <ul class="dropdown-menu pull-right"> <li><a href="#"><i class="icon-trash"></i> Delete Room</a></li> </ul> </div> </div> </div> </div> jQuery: $(document).on('click','.addItem', function(){ $('<!--ROW START-->\ <form class="widget-content item">\ <div class="row">\ <div class="col-md-3"><input type="text" class="form-control" name="itemName[]"></div>\ <div class="col-md-3"><textarea class="auto form-control" name="itemDescription[]" cols="20" rows="1" style="word-wrap: break-word; resize: vertical;"></textarea></div>\ <div class="col-md-3"><textarea class="auto form-control" name="itemCondition[]" cols="20" rows="1" style="word-wrap: break-word; resize: vertical;"></textarea></div>\ <input type="hidden" class="itemId" name="itemId[]" value="">\ <input type="hidden" name="itemInventoryId[]" value="<?=$_GET["inventory_id"]?>">\ <input type="hidden" name="itemParent[]" value="'+$(this).closest().attr('data-parent-room')+'">\ <div class="col-md-2">\ <div class="fileinput-holder input-group">\ <input id="fileupload" type="file" name="files[]" data-url="uploads/">\ </div>\ </div>\ <div class="col-md-1 align-center"><i class="save icon-ok large"> </i>&nbsp;&nbsp;&nbsp;<i class="delete icon-trash large"> </i></div>\ </div>\ </form>\ <!--/ROW END-->').fadeIn(500).appendTo($(this).parents().siblings('.items')); $(this).parent().parent().siblings('.widget-header, .header-margin, .hide').removeClass('hide').fadeIn(); }); Like i say, it all works fine apart from that damn data-parent-room value. Any help is appreciated! using jQuery 1.10.1

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• c++ "interface"-like classes similar to Java?

  - by William the Coderer

  In Java, you can define an interface as a class with no actual code implementation, but only to define the methods that a class must implement. Those types can be passed as parameters to methods and returned from methods. In C++, a pure virtual class can't be used as a parameter or return type, from what I can tell. Any way to mimic Java's interface classes? I have a string class in C++, and several subclasses for different encodings (like UTFxxx, ISOxxx, etc) that derive from the base string class. However, since there are so many different encodings, the base class has no meaningful implementation. But it would serve well as an interface if I could handle it as its own object and calls to that object would call on the correct subclass it was inherited to.

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• Dynamically add annotation to an existing class

  - by ng

  I have the following class public class Person { ... } I would like to create another class that would look like this. @SomeAnnotation public class Person { ... } Via a simple method like so. public static Class addAnnotation(Class originalType, Class<? extends Annotation> annotation) { // what goes here? } Is there an easy way to do this via ASM for example? What dependencies would I need. I have tried to Google this however the examples I have found are either incomplete or are doing something else. Other frameworks such as javassist would be just as good.

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• How to extend WCF returned class properly?

  - by vikasde

  I am using a WCF service in my project. This service returns a class called "Store". I created a new local class which inherits from "Store". My class is called "ExtendedStore". My ExtendedStore looks like this: class ExtendedStore : StoreManagerService.Store { public int Id; .... } Now I am using the WCF service to cast to my class using the following code: StoreManagerService.StoreClient client = new StoreManagerService.StoreClient(); ExtendedStore store = (ExtendedStore) client.GetStore(); // bombs here I am not able to cast the returned Store class from the service to my ExtendedStore class. I get the below error message: Unable to cast object of type 'ConsoleApplication1.StoreManagerService.Store' to type 'ConsoleApplication1.ExtendedStore'. Shouldn't I be able to cast it? If not, is there a workaround?

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• switch from glOrtho to gluPerspective

  - by Knitex

  I have a car draw at (0,0) and some obstacles set up but right now my main concern is switching from glPerspective to glOrtho and vice-versa. All that i get when i switch from perspective to ortho is a black screen. void myinit(){ glClearColor(0.0,0.0,0.0,0.0); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(60,ww/wh,1,100); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(-5,5,3,backcarx,topcarx,0,0,0,1); } void menu(int id){ /*menu selects if you want to view it in ortho or perspective*/ if(id == 1){ glClear(GL_DEPTH_BUFFER_BIT); glViewport(0,0,ww,wh); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-2,100,-2,100,-1,1); glMatrixMode(GL_MODELVIEW); glutPostRedisplay(); } if(id == 2){ glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(60,ww/wh,1,100); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); viewx = backcarx - 10; viewy = backcary - 10; gluLookAt(viewx,viewy,viewz,backcarx,topcarx,0,0,0,1); } } i've tried using the clear depth buffer and still doesnt work.

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• store in a variable only the first or only the second class of an element

  - by shecky

  I'm using this bit of jQ to add a class to two different elements based on the class of another (parent/grandparent, etc) element: $(document).ready(function(){ var containerClass = $('#main-content').attr('class'); $('#nav-primary li#'+containerClass).addClass('active'); $('#aux-left div[id$='+containerClass+']').addClass('active'); }); Brilliant, but I have two problems with it: First, when there's no class at all in <div id="main-content">, the 'active' class is added to all the #nav-primary LIs, and also to all the #aux-left DIVs; how can I modify this so that in the absence of any class on #main-content, do nothing? Second, how can I target only the first or second of multiple classes to store in the 'containerClass' variable, e.g., <div id="main-content" class="apples bananas">? Very much appreciated! svs

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• Table per subclass inheritance relationship: How to query against the Parent class without loading a

  - by Arthur Ronald F D Garcia

  Suppose a Table per subclass inheritance relationship which can be described bellow (From wikibooks.org - see here) Notice Parent class is not abstract @Entity @Inheritance(strategy=InheritanceType.JOINED) public class Project { @Id private long id; // Other properties } @Entity @Table(name="LARGEPROJECT") public class LargeProject extends Project { private BigDecimal budget; } @Entity @Table(name="SMALLPROJECT") public class SmallProject extends Project { } I have a scenario where i just need to retrieve the Parent class. Because of performance issues, What should i do to run a HQL query in order to retrieve the Parent class and just the Parent class without loading any subclass ???

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• Link a programmatic instantiation of class x in class y to a view controller of class x

  - by Joel Derfner

  I have classes Compose and Haiku, each connected to a view controller in IB. Haiku is instantiated in Compose as ghhaiku. Haiku has an array, self.arrayOfHaiku, with 117 members. But in Compose, self.ghhaiku.arrayOfHaiku has no members. I think the problem is that I haven't linked the instance of Haiku that has the 117-member array with the instance of Haiku created in Compose. But how do I do that? (I could of course be totally wrong and the problem could be something else, but that seems to make intuitive sense.) Any thoughts?

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• update value of a variable outside a class in VB.NET

  - by dpp

  I have a class derived from a Form, it has textbox for username and password and an OK button. I want it to behave like an InputBox so I can use it like this: Dim Username As String = "" Dim Password As String = "" Dim authorization As New Authorization(Username, Password) authorization.ShowDialog() 'The user will click OK and I will expect the Username and Password to change based on the user input MsgBox(Username & " " & Password) The Authorization class: Public Class Authorization Dim RefUsername As String Dim RefPassword As String Public Sub New(ByRef Username As String, ByRef Password As String) InitializeComponent() RefUsername = Username 'I'm trying to pass reference instead of value RefPassword = Password 'I'm trying to pass reference instead of value End Sub Private Sub OKButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AuthorizeButton.Click RefUsername = Username.Text 'I'm trying to change value of variable outside the class RefPassword = Password.Text 'I'm trying to change value of variable outside the class Me.Close() End Sub End Class In short, I want to change the value of variables outside the class when the user clicks the OK, how am I going to accomplish that?

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• JQuery if/else statement matching a wildcard css name

  - by Neokoenig

  Hi All, I'm trying to write an if/else statement in jQuery which can change an elements class by matching 'IN' or 'OUT' (in this case). I.e, I have several Divs with class='IN-something' OR class='OUT-something'. The below would work if I new the exact CSS class, but all I'll know is whether it contains 'IN' or 'OUT'. So like this, but works: if ($(jRow).hasClass('IN-*')) {jRow.attr( "class", "OUT-foo" );} else {jRow.attr( "class", "IN-foo");} Ideas? Thanks!

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• How is does this module code work?

  - by phsr

  I'm new to ruby and I am trying to figure out how the following code works The following code is inside a class in a module. The method is called later with the following code: @something ||= Module::Class.config class << self def config &block options = OpenStruct.new yield options if block_given? init_client! Client.new(options) end def init_client!(client) base_eigenclass = class << Base; self; end base_eigenclass.send :define_method, :client do @client = client end client end end The class has some constants in it, and when the classes initialize is called, the instance member are set to option.variable || VARIABLE_CONSTANT. I understand that if there is no value for option.variable then VARIABLE_CONSTANT is used, but I don't understand that calling Module::Class.config do |options| #some block end set the @client until config is called again with options The code definitely works, but I want to understand how it does

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• VB.Net Create Database table from class property

  - by joeb

  I'm trying to create an inheritable class(OF t) in vb.net that I will pass it a class of objects. Inside the class of objects I want to use the class properties to create a corresponding database table. Like below Public Class SampleClass #Region "Properties" Private newPropertyValue As String Public Property NewProperty() As String Get Return newPropertyValue End Get Set(ByVal value As String) newPropertyValue = value End Set End Property #End Region Public Sub New() End Sub End Class I'm new to vb.net so I don't know my way around exactly. I was looking into class attributes for this action but they do not fully make sense to me yet. Thanks in advance.

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• If I'm projecting with linq and not using a range variable what is the proper syntax?

  - by itchi

  I have a query that sums and aggregates alot of data something like this: var anonType = from x in collection let value = collection.Where(c=>c.Code == "A") select new { sum = value.Sum(v=>v.Amount) }; I find it really weird that I have to declare the range variable x, especially if I'm not using it. So, am I doing something wrong or is there a different format I should be following? Also, keep in mind that anonType has about 15 different properties that are all types of aggregates (sums,counts, etc). So I couldn't do something like: int x = collection.Where(c=>c.Code == "A").Sum(v=>v.Amount);

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• How does this module code work?

  - by phsr

  I'm new to ruby and I am trying to figure out how the following code works The following code is inside a class in a module. The method is called later with the following code: @something ||= Module::Class.config class << self def config &block options = OpenStruct.new yield options if block_given? init_client! Client.new(options) end def init_client!(client) base_eigenclass = class << Base; self; end base_eigenclass.send :define_method, :client do @client = client end client end end The class has some constants in it, and when the classes initialize is called, the instance member are set to option.variable || VARIABLE_CONSTANT. I understand that if there is no value for option.variable then VARIABLE_CONSTANT is used, but I don't understand that calling Module::Class.config do |options| #some block end set the @client until config is called again with options The code definitely works, but I want to understand how it does

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• PHP loading / including files only if class is used

  - by MrMalayev

  I have a couple of classes, and certain classes require only a part of an SDK. For example class a { /* requires filea.php*/ } class b { /*requires fileb.php*/ } Instead of including the files at the top like require_once 'filea.php'; require_once 'fileb.php'; class a { /*do stuff*/ } class b { /*do stuff*/ } Can I just include them in the class, so one only loads when an object is made? class a { require filea.php; /*do stuff*/ } class b { require fileb.php; /*do stuff*/ }

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• XSLT - Adding a class to something with a class?

  - by Probocop

  When using XSLT how do I apply a class to an element which already has a class? The way I'm doing it it replaces the class that is already present? How would I add the class in addition to the existing class? My code is as follows: <xsl:if test="data[@alias = 'off'] = 1"> <xsl:attribute name="class">off</xsl:attribute> </xsl:if> <xsl:if test="$currentPage/ancestor-or-self::node/@id = current()/@id"> <xsl:attribute name="class">active</xsl:attribute> </xsl:if> Thanks.

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• name of the class that contains the method code

  - by kdlp

  I'm trying to find the name of the class that contains method code. In the example underneath I use self.__class__.__name__, but of course this returns the name of the class of which self is an instance and not class that contains the test() method code. b.test() will print 'B' while I would like to get 'A'. I looked into the inspect module documentation but did not find anything directly useful. class A: def __init__(self): pass def test(self): print self.__class__.__name__ class B(A): def __init__(self): A.__init__(self) a = A() b = B() a.test() b.test()

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• Administering Team Foundation Server 2010 Class resource links

  - by John Alexander

  Here are the resource links for the Administering Team Foundation Server 2010 Class from last week in Minneapolis.  Microsoft® Visual Studio® 2010 and Team Foundation Server® 2010 RTM virtual machine for Microsoft® Virtual PC 2007 SP1 http://www.microsoft.com/downloads/en/details.aspx?FamilyID=5e13b15a-fd74-4cd7-b53e-bdf9456855bd Microsoft® Visual Studio® 2010 and Team Foundation Server® 2010 RTM virtual machine for Windows Virtual PC http://www.microsoft.com/downloads/en/details.aspx?FamilyID=509c3ba1-4efc-42b5-b6d8-0232b2cbb26e Microsoft® Visual Studio® 2010 and Team Foundation Server® 2010 RTM virtual machine for Windows Server 2008 Hyper-V http://www.microsoft.com/downloads/en/details.aspx?FamilyID=e0198b64-4acb-4709-b07f-359fb4d523bc Customizable process guidance http://blogs.msdn.com/b/allclark/archive/2010/08/12/customizable-process-guidance.aspx The 5 most read Visual Studio ALM help topics on MSDN http://blogs.msdn.com/b/allclark/archive/2010/11/12/the-5-most-read-visual-studio-alm-help-topics-on-msdn.aspx Inside TFS http://visualstudiomagazine.com/Articles/List/Inside-TFS.aspx Testing Topics http://msdn.microsoft.com/en-us/library/dd286594.aspx Blogs http://community.accentient.com http://geekswithblogs.net Branching Guide http://tfsbranchingguideiii.codeplex.com/ Great VSTS blog http://geekswithblogs.net/hinshelm/Default.aspx My Blog :D http://geekswithblogs.net/jalexander/Default.aspx Visual Studio Forums http://bit.ly/fE16u3 TFS Migration and Integration Solutions http://bit.ly/cLaBnT TFS Migration and Integration Tools (VS ALM Rangers) http://bit.ly/9tHWdG TFS Migration and Integration Platform (CodePlex) http://tfsintegration.codeplex.com Team Foundation Server SDK http://code.msdn.microsoft.com/TfsSdk Migrate and Integration Forum http://bit.ly/f4Lnps Team Foundation Server Widgets http://www.tfswidgets.com TFS Sdk http://code.msdn.microsoft.com/TfsSdk TFS Migration and Integration Solutions http://bit.ly/cLaBnT TFS Integration Tools Forum http://bit.ly/f4Lnps TFS Integration Tools http://bit.ly/9tHWdG TFS Integration Platform http://tfsintegration.codeplex.com VS Upgrade Guide http://vs2010upgradeguide.codeplex.com Updating an Upgraded Team Project to Access New Features http://bit.ly/9cCcMP Team Foundation Power Tools http://bit.ly/dfNVQk Team Foundation Administration Tool http://tfsadmin.codeplex.com Using Team Foundation Server Command-Line Tools http://bit.ly/hCyozJ Changing Groups and Permissions with TFSSecurity http://bit.ly/esIjgw Unofficial Prep guide for TFS 2010 Administration Exam (70-512) http://geekswithblogs.net/enriquelima/archive/2010/07/21/unofficial-prep-guide-for-tfs-2010-administration-exam-70-512.aspx Another Prep Guide http://bit.ly/bpO30R Professional Application Lifecycle Management with VS 2010 Book http://bit.ly/9rCIRj Search CodePlex for TFS related apps http://www.codeplex.com/site/search Visual Studio Gallery http://visualstudiogallery.com TFS Widgets http://tfswidgets.com Migrate from Visual SourceSafe http://bit.ly/8XPSRh Team Foundation Server MSSCCI Provider 2010 http://bit.ly/dst1OQ Attrice TFS Sidekicks www.attrice.info/cm/tfs Hosted TFS http://bit.ly/cMZdvp Manually Processing the Team Foundation Server 2010 Data Warehouse and Analysis Services Database http://bit.ly/aG5oEh TFS 2005, 2008 and 2010 Compatibility http://shrinkster.com/1dhj

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• How To show document directory save image in thumbnail in cocos2d class

  - by Anil gupta

  I have just implemented multiple photo selection from iphone photo library and i am saving all selected photo in document directory every time as a array, now i want to show all saved images in my class from document directory as a thumbnail, i have tried some logic but my game getting crashing, My code is below. Any help will be appreciate. Thanks in advance. -(id) init { // always call "super" init // Apple recommends to re-assign "self" with the "super" return value if( (self=[super init])) { CCSprite *photoalbumbg = [CCSprite spriteWithFile:@"photoalbumbg.png"]; photoalbumbg.anchorPoint = ccp(0,0); [self addChild:photoalbumbg z:0]; //Background Sound // [[SimpleAudioEngine sharedEngine]playBackgroundMusic:@"Background Music.wav" loop:YES]; CCSprite *photoalbumframe = [CCSprite spriteWithFile:@"photoalbumframe.png"]; photoalbumframe.position = ccp(160,240); [self addChild:photoalbumframe z:2]; CCSprite *frame = [CCSprite spriteWithFile:@"Photo-Frames.png"]; frame.position = ccp(160,270); [self addChild:frame z:1]; /*_____________________________________________________________________________________*/ CCMenuItemImage * upgradebtn = [CCMenuItemImage itemFromNormalImage:@"AlbumUpgrade.png" selectedImage:@"AlbumUpgrade.png" target:self selector:@selector(Upgrade:)]; CCMenu * fMenu = [CCMenu menuWithItems:upgradebtn,nil]; fMenu.position = ccp(200,110); [self addChild:fMenu z:3]; NSError *error; NSFileManager *fM = [NSFileManager defaultManager]; NSString *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; NSLog(@"Documents directory: %@", [fM contentsOfDirectoryAtPath:documentsDirectory error:&error]); NSArray *allfiles = [fM contentsOfDirectoryAtPath :documentsDirectory error:&error]; directoryList = [[NSMutableArray alloc] init]; for(NSString *file in allfiles) { NSString *path = [documentsDirectory stringByAppendingPathComponent:file]; [directoryList addObject:file]; } NSLog(@"array file name value ==== %@", directoryList); CCSprite *temp = [CCSprite spriteWithFile:[directoryList objectAtIndex:0]]; [temp setTextureRect:CGRectMake(160.0f, 240.0f, 50,50)]; // temp.anchorPoint = ccp(0,0); [self addChild:temp z:10]; for(UIImage *file in directoryList) { // NSData *pngData = [NSData dataWithContentsOfFile:file]; // image = [UIImage imageWithData:pngData]; NSLog(@"uiimage = %@",image); // UIImage *image = [UIImage imageWithContentsOfFile:file]; for (int i=1; i<=3; i++) { for (int j=1;j<=3; j++) { CCTexture2D *tex = [[[CCTexture2D alloc] initWithImage:file] autorelease]; CCSprite *selectedimage = [CCSprite spriteWithTexture:tex rect:CGRectMake(0, 0, 67, 66)]; selectedimage.position = ccp(100*i,350*j); [self addChild:selectedimage]; } } } } return self; }

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• Class instance clustering in object reference graph for multi-entries serialization

  - by Juh_

  My question is on the best way to cluster a graph of class instances (i.e. objects, the graph nodes) linked by object references (the -directed- edges of the graph) around specifically marked objects. To explain better my question, let me explain my motivation: I currently use a moderately complex system to serialize the data used in my projects: "marked" objects have a specific attributes which stores a "saving entry": the path to an associated file on disc (but it could be done for any storage type providing the suitable interface) Those object can then be serialized automatically (eg: obj.save()) The serialization of a marked object 'a' contains implicitly all objects 'b' for which 'a' has a reference to, directly s.t: a.b = b, or indirectly s.t.: a.c.b = b for some object 'c' This is very simple and basically define specific storage entries to specific objects. I have then "container" type objects that: can be serialized similarly (in fact their are or can-be "marked") they don't serialize in their storage entries the "marked" objects (with direct reference): if a and a.b are both marked, a.save() calls b.save() and stores a.b = storage_entry(b) So, if I serialize 'a', it will serialize automatically all objects that can be reached from 'a' through the object reference graph, possibly in multiples entries. That is what I want, and is usually provides the functionalities I need. However, it is very ad-hoc and there are some structural limitations to this approach: the multi-entry saving can only works through direct connections in "container" objects, and there are situations with undefined behavior such as if two "marked" objects 'a'and 'b' both have a reference to an unmarked object 'c'. In this case my system will stores 'c' in both 'a' and 'b' making an implicit copy which not only double the storage size, but also change the object reference graph after re-loading. I am thinking of generalizing the process. Apart for the practical questions on implementation (I am coding in python, and use Pickle to serialize my objects), there is a general question on the way to attach (cluster) unmarked objects to marked ones. So, my questions are: What are the important issues that should be considered? Basically why not just use any graph parsing algorithm with the "attach to last marked node" behavior. Is there any work done on this problem, practical or theoretical, that I should be aware of? Note: I added the tag graph-database because I think the answer might come from that fields, even if the question is not.

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