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  • Why does the definition of MyAnnotation need Documented, Inherited, Retention & RetentionPolicy?

    - by cafe
    What is the purpose of these java.lang.annotation imports in this code? Why are they needed to define MyAnnotation? import java.lang.annotation.Documented; import java.lang.annotation.Inherited; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; @Documented @Retention(RetentionPolicy.RUNTIME) @Inherited public @interface MyAnnotation { String value() default ""; }

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  • Compiling servlets for tomcat

    - by L4N0
    Hello I am trying to modify one of the default files that comes with tomcat SessionExample.java, and trying to compile it but I get an error. javac -classpath "E:\Program Files\Apache Software Foundation\Apache Tomcat 6.0.18\lib\servlet-api.jar" SessionExample.java Gives me this error SessionExample.java:26: package util does not exist import util.HTMLFilter; ^ SessionExample.java:90: cannot find symbol symbol : variable HTMLFilter location: class SessionExample out.println(HTMLFilter.filter(name) + " = " ^ SessionExample.java:91: cannot find symbol symbol : variable HTMLFilter location: class SessionExample + HTMLFilter.filter(value) + ""); ^ 3 errors Thank you

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  • IS classOf[] in scala 2.8 different from 2.7?

    - by redtank
    I have an interface from java public class IJava { ... public java.lang.Class getType(); ... } It is inherited in Scala class CScala { def getType() = classOf[Foo] } it worked in scala 2.7.7. But in 2.8.0.RC1, i get type mismatch; found : java.lang.ClassFoo required: java.lang.Class How do i get java.langClass in Scala 2.8

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  • Alternative to "inheritance v composition??"

    - by Frank
    I have colleagues at work who claim that "Inheritance is an anti-pattern" and want to use composition systematically instead, except in (rare, according to them) cases where inheritance is really the best way to go. I want to suggest an alternative where we continue using inheritance, but it is strictly forbidden (enforced by code reviews) to use anything but public members of base classes in derived classes. For a case where we don't need to swap components of a class at runtime (static inheritance), would that be equivalent enough to composition? Or am I forgetting some other important aspect of composition?

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  • What is a correct step by step logic of exporting scene with baked occlusion for loading it at runtime?

    - by myWallJSON
    I wonder what is a correct step by step logic of exporting scene with baked occlusion (Culling data) for loading that scene at runtime (on fly from the internet for example))? So currently my plan looks like this: I create prefabs Place them onto my scene (into Hierarchy) (say create 20 buffolows and some hourses and some buildings) Create empty prefab and drag all my scene objects from hierarchy onto it Export prefab So generally I put all my scene objects into one large prefab and export it but it seems that all objects that were marked as static get this property turned off when loading them at runtime and so no Frustrum Culling, and no Occlusion culling happens. So I wonder what is a correct way of exporting Sceen + Objecrts + Occlusion (and onther culing) data for future load of such scene at runtime? I wonder about current 3.5.2 Pro and future 4 Pro versions of U3D.

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  • Is it okay to have many Abstract classes in your application?

    - by JoseK
    We initially wanted to implement a Strategy pattern with varying implementations of the methods in a commmon interface. These will get picked up at runtime based on user inputs. As it's turned out, we're having Abstract classes implementing 3 - 5 common methods and only one method left for a varying implementation i.e. the Strategy. Update: By many abstract classes I mean there are 6 different high level functionalities i.e. 6 packages , and each has it's Interface + AbstractImpl + (series of Actual Impl). Is this a bad design in any way? Any negative views in terms of later extensibility - I'm preparing for a code/design review with seniors.

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  • Dynamic Strategy Pattern [migrated]

    - by Karl Barker
    So I'm writing a web service architecture which includes FunctionProvider classes which do the actual processing of requests, and a main Endpoint class which receives and delegates requests to the proper FunctionProvider. I don't know exactly the FunctionProviders available at runtime, so I need to be able to 'register' (if that's the right word) them with my main Endpoint class, and query them to see if they match an incoming request. public class MyFunc implements FunctionProvider{ static { MyEndpoint.register(MyFunc); } public Boolean matchesRequest(Request req){...} public void processRequest(Request req){...} } public class MyEndpoint{ private static ArrayList<FunctionProvider> functions = new ArrayList<FunctionProvider>(); public void register(Class clz){ functions.add(clz); } public void doPost(Request request){ //find the FunctionProvider in functions //matching the request } } I've really not done much reflective Java like this (and the above is likely wrong, but hopefully demonstrates my intentions). What's the nicest way to implement this without getting hacky?

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  • Nhibernate upgraded getting 'Antlr.Runtime.NoViableAltException' on outer join using *=

    - by user86431
    so we upgraded to newer Nhibernate and Fluent Nhibernate. now I' getting this exception: FailedNHibernate.Hql.Ast.ANTLR.QuerySyntaxException: Exception of type 'Antlr.Runtime.NoViableAltException' was thrown. near line 1, column 459 On this hql, which worked fine before the upgrade. SELECT s.StudId, s.StudLname, s.StudFname, s.StudMi, s.Ssn, s.Sex, s.Dob, et.EnrtypeId, et.Active, et.EnrId, sss.StaffLname, sss.StaffFname, sss.StaffMi,vas.CurrentAge FROM CIS3G.Jcdc.EO.StudentEO s , CIS3G.Jcdc.EO.EnrollmentEO e , CIS3G.Jcdc.EO.EnrollmentTypeEO et , CIS3G.Jcdc.EO.VwStaffStudentStaffEO sss, CIS3G.Jcdc.EO.VwAgeStudentEO vas WHERE ( e.EnrId = et.EnrId ) AND ( s.StudId = vas.StudId ) AND ( s.StudId = e.StudId ) AND ( et.EnrtypeId *= sss.EnrtypeId ) AND ( Isnull ( sss.StudStaffRoleCd , 1044 ) = 1044 ) AND ( s.StudId = 4000 ) Clearly it does nto like the *= syntax, I tried rewritign is as ansi sql outer join and no joy. Can anyone tell me what ineed to change the sql to so I can get the outer join to work correctly? Thanks, Eric-

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  • System.Security.VerificationException: Operation could destabilize the runtime

    - by Rigobert Song
    I have a web service which is queried using linq to sql but returns an array of objects. I keep getting the following error: System.Security.VerificationException: Operation could destabilize the runtime When I run a method that uses a linq statement to return an array I get this error, but only on my test server, which is windows server 2008. Everything works fine in my win 7 machine. The project is a .net 3.5. Any ideas what the problem might be? Thanks UPDATE: My linq queries return IQueryable.

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  • Unknown runtime error number: -2146827687

    - by Simone Vellei
    I have an error in my GXT code on Internet Explorer (both Development Mode and not) when i try to attach a label to a panel. The error is "Unknown runtime error number: -2146827687" but this error in a GWT module is throws always, in other gwt modules with a label attached to the panel the error there isn't. The layout of panel is a GridFormLayout developed by me. The error is thrown when the renderComponentInCell is called (the method is called on doLayout) and the component is not rendered (else condition). private void renderComponentInCell(Component component, Element cell) { if (component.isRendered()) { cell.appendChild(component.getElement()); } else { component.render(cell); } } What can I do?

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  • Cygwin compiling error: "this application has requested the runtime to terminate it in an unusual wa

    - by naspinski
    I am trying to run Cygwin, and I am running into some problems. I tried to compile a program that works both on Windows with mingw and on a Unix system, but when I go to compile it through Cygwin: gcc threads.c -o threads I get the error: this application has requested the runtime to terminate it in an unusual way And that's it... any ideas what I am forgetting or screwing up? I haven't touched this stuff in about 5 years so I am beyond rusty; thanks!

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  • Need to get .obj file names of Executable(which one is crrently executing) at runtime programaticall

    - by Usman
    Suppose I have a VC++ project contains no of(say e.g 5) Source files(.cpp files),it will generate 5 .obj files(obj files corresponding to my .cpp's files not all kernel and OS layers including .obj files) e.g my project includes xyz_1.cpp,xyz_2.cpp,xyz_3.cpp,xyz_4.cpp,it will corresponds 4 respective .objs. By programtaically HOW CAN I TAKE AND GET THE NAMES OF THESE 4 .OBJ files at runtime(On run time I need to check how many obj files & names of those objs). REMEMBER I DON'T NEED ALL KERNEL AND OS LAYER .OBJS I ONLY NEED OBJS OF MY .CPPs. Regards Usman

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  • Assign binding path at runtime in WPF DataTemplate

    - by Abiel
    I am writing a WPF program in C# in which I have a ListView for which the columns will be populated at runtime. I would like to use a custom DataTemplate for the GridViewColumn objects in the ListView. In the examples I have seen where the number of columns is fixed in advance, a custom DataTemplate is often created using something like the XAML below. <DataTemplate x:Key="someKey"> <TextBlock Text="{Binding Path=FirstName}" /> </DataTemplate> This DataTemplate could also later be assigned to GridViewColumn.CellTemplate in the code-behind by calling FindResource("someKey"). However, this alone is of no use to me, because in this example the Path element is fixed to FirstName. Really I need something where I can set the Path in code. It is my impression that something along these lines may be possible if XamlReader is used, but I'm not sure how in practice I would do this. Any solutions are greatly appreciated.

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  • Jquery runtime error: object expected

    - by Joris
    The Jquery script that controls my tabcontainer gives an "object expected" runtime error. I honestly can't find the reason why: $(document).ready(function() { //When page loads... $(".tab_content").hide(); //Hide all content $("ul.tabs li:first").addClass("active").show(); //Activate first tab $(".tab_content:first").show(); //Show first tab content //On Click Event $("ul.tabs li").click(function() { $("ul.tabs li").removeClass("active"); //Remove any "active" class $(this).addClass("active"); //Add "active" class to selected tab $(".tab_content").hide(); //Hide all tab content var activeTab = $(this).find("a").attr("href"); //Find the href attribute value to identify the active tab + content $(activeTab).fadeIn(); //Fade in the active ID content return false; }); }); Has it something to do with the stylesheet?

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  • Add functions in gdb at runtime

    - by Michael Anderson
    I'm trying to debug some STL based C++ code in gdb. The code has something like int myfunc() { std::map<int,int> m; ... } Now in gdb, inside myfunc using "print m" gives something very ugly. What I've seen recommended is compiling something like void printmap( std::map<int,int> m ) { for( std::map<int,int>::iterator it = ... ) { printf("%d : %d", it->first, it->second ); } } Then in gdb doing (gdb) call printmap( m ) This seems like a good way to handle the issue... but can I put printmap into a seperate object file (or even dynamic library) that I then load into gdb at runtime rather than compiling it into my binary - as recompiling the binary every time I want to look at another STL variable is not fun .. while compiling and loading a single .o file for the print routine may be acceptable.

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  • Disable selected automated tests at runtime

    - by squig
    Is is posable to disable selected automated tests at runtime? I'm using VSTS and rhino mocks and have some intergation tests that require an external dependancy to be installed (MQ). Not all the developers on my team have this installed. Currently all the tests that require MQ inherit from a base class that checks if MQ is installed and if is not sets the test result to inconclusive. This works as it stops the tests from running, but marks the test run as unsuccseessful and can hide other failures. Any ideas?

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  • Unable to find static resource in runtime even while designer can see it

    - by xumix
    So i have this markup: <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Werp.MigrationHelper"> <Style TargetType="{x:Type UserControl}" x:Key="WizardPageControl" x:Name="WizardPageControl"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type UserControl}"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="10" /> <ColumnDefinition Width="475" /> <ColumnDefinition Width="10" /> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="10" /> <RowDefinition Height="410"/> <RowDefinition Height="50" /> <RowDefinition Height="10" /> </Grid.RowDefinitions> <StackPanel Orientation="Vertical" Name="MainContent" Grid.Row="1" Grid.Column="1"> <ContentPresenter Content="{TemplateBinding Content}"/> </StackPanel> <StackPanel Grid.Column="1" Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Bottom" Margin="0,0,0,10" Height="30"> <Button Name="BackButton" Width="50" xml:space="preserve">&lt; _Back</Button> <Button Name="NextButton" Width="50" Margin="10,0,0,0" xml:space="preserve" IsDefault="True">_Next &gt;</Button> <Button Name="CancelButton" Width="50" Margin="10,0,0,0" IsCancel="True">_Cancel</Button> <Button Name="FinishButton" IsEnabled="True" Width="50" Margin="10,0,0,0">_Finish</Button> </StackPanel> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> <Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Resources\WizardPageControl.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Application.Resources> </Application> <UserControl x:Class="Werp.MigrationHelper.WizardPageControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:Werp.MigrationHelper" mc:Ignorable="d"> </UserControl> Then I try to use it: <PageFunction xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Werp.MigrationHelper" x:Class="Werp.MigrationHelper.WizardPage1" x:TypeArguments="local:WizardResult" KeepAlive="True" WindowTitle="Wizard Page 1" > <local:WizardPageControl Style="{StaticResource ResourceKey=WizardPageControl}"> <local:WizardPageControl.Content> qweqweqweqweq </local:WizardPageControl.Content> </local:WizardPageControl> </PageFunction> The VS designer show everything Ok, but in runtime i get System.Windows.Markup.XamlParseException occurred Message='Provide value on 'System.Windows.StaticResourceExtension' threw an exception.' Line number '4' and line position '5'. Source=PresentationFramework LineNumber=4 LinePosition=5 StackTrace: at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri) at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream) at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator) at Werp.MigrationHelper.WizardPage1.InitializeComponent() in d:\Home\Docs\Visual Studio 2008\Projects\csharp\wizardpage1.xaml:line 1 at Werp.MigrationHelper.WizardPage1..ctor(WizardData wizardData) in D:\home\Docs\Visual Studio 2008\Projects\csharp\WizardPage1.xaml.cs:line 12 InnerException: Message=Cannot find resource named 'WizardPageControl'. Resource names are case sensitive. Source=PresentationFramework StackTrace: at System.Windows.StaticResourceExtension.ProvideValue(IServiceProvider serviceProvider) at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me, IServiceProvider serviceProvider) InnerException: Whats the prolem??

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  • Crystal Reports and Report Viewer runtime question

    - by Spooky2010
    Using vs2008 c#. Howdy, Ive got an application where im trying to decide if i should use the Crystal reports or the Report viewer that comes with the visual studio install. My issue is that while it will run fine on my development machine, a lot of the machines the application will be deployed to in remote locations WONT have the runtime for either crystal reports or the report viewer installed. therefore if i build an application using either of these, and prevent user access to the reports only on the machines that do NOT have the runtimes, can the application run ok, or should i expect crazy errors on install and such Any advice appreciated.

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  • Reflection and changing a variables type at runtime?

    - by james-west
    Hi I'm trying to create an object Of a specific type. I've got the following code, but it fails because it can't cast the new table object to the one that is already defined. I need table to start of an IEnumerable type so I can't declare is an object. Public sub getTable(ByVal t as Type) Dim table As Table(Of Object) Dim tableType As Type = GetType(Table(Of )).MakeGenericType(t) table = FormatterServices.GetUninitializedObject(tableType) End sub So in short - is there a way of changing a variable type at runtime? (or a better way of doing what I'm doing) Thanks in advance. James

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  • Change My.Settings ConnectionString in runtime?

    - by Sultanen
    I have a ClickOnce deployment where i have a INI-settings file on the network file with "global" settings that is supposed to affect the program on all client computers. The problem i have is that i whant to have the Database connectionString stored in this INI file and have it read and stored in the My.Settings ConnectionString at program startup. How do i do this? The ConnectionString setting is Application scoped and therefore Read-Only, if i try to set it by My.Settings("ConnectionString") = "Source=server;Initial Catalog=database;Integrated Security=True" I get a runtime error: An error occurred creating the form. See Exception.InnerException for details. The error is: The type initializer for 'DB_lib.DB_LINQ' threw an exception. [EDIT] I got rid of the error by using the My.Settings("ConnectionString") = "Source=server;Initial Catalog=database;Integrated Security=True" in another place then the the eventtriggerd settingsLoaded method i created.. The problem is that even though the connectionstring semes to be the right, the program still connects to the "default" database that is typed in to the app.config file??

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  • add ms ajax accordion pane at runtime loses previous pane issue

    - by Chris Conway
    I have an AjaxControlToolkit accordion control that i'm trying to load panes at runtime. When I click a button inside a listview, it should add a new pane to the accordion control. Here is the code that adds the pane in the onitemcommand event within the listview var pane = new AccordionPane { ID = key }; pane.HeaderContainer.Controls.Add(new LiteralControl(label.Text)); pane.ContentContainer.Controls.Add(LoadControl("~/UserControls/Covers/" + e.CommandArgument + ".ascx")); accordion.Panes.Add(pane); And this will successfully show a webcontrol inside the accordion control. But when I click on another button in the listview, the accordion is reset and it only shows the new pane instead of appending a new pane. Is there any way to keep the previous pane visible across postbacks like this? By the way, each of the webcontrols that are loaded in the accordion have input fields that will need to be persisted across postbacks as well. thanks!

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  • Dynamic/runtime method creation (code generation) in Python

    - by Eli Bendersky
    Hello, I need to generate code for a method at runtime. It's important to be able to run arbitrary code and have a docstring. I came up with a solution combining exec and setattr, here's a dummy example: class Viking(object): def __init__(self): code = ''' def dynamo(self, arg): """ dynamo's a dynamic method! """ self.weight += 1 return arg * self.weight ''' self.weight = 50 d = {} exec code.strip() in d setattr(self.__class__, 'dynamo', d['dynamo']) if __name__ == "__main__": v = Viking() print v.dynamo(10) print v.dynamo(10) print v.dynamo.__doc__ Is there a better / safer / more idiomatic way of achieving the same result?

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  • How to populate an ontology at runtime?

    - by Chan
    I have a configuration file with a lot of data like sensor locations, type, rules for activating devices etc. Basically related to a pervasive system. I plan to design an ontology for this domain. The doubt in my mind is how should I populate the ontology with the information in the configuration file, as the configuration files are going to change every now and then. Earlier I was planning to use XML, so I can just read the configuration file at runtime and create an XML as per the XSD. Do we use the same technique for Ontologies? If yes then what is the format of the populated ontology? Thanks Chan

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  • Function with missing return value, behavior at runtime

    - by nabulke
    As expected, the compiler (VisualStudio 2008) will give a warning warning C4715: 'doSomethingWith' : not all control paths return a value when compiling the following code: int doSomethingWith(int value) { int returnValue = 3; bool condition = false; if(condition) // returnValue += value; // DOH return returnValue; } int main(int argc, char* argv[]) { int foo = 10; int result = doSomethingWith(foo); return 0; } But the program runs just fine. The return value of function doSomethingWith() is 0. Is is just undefined behavior, or is there a certain rule how the result value is created/computed at runtime. What happens with non-POD datatypes as return value?

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  • How to populating Ontology at runtime?

    - by Chan
    Hi, I have a configuration file with a lot of data like sensor locations, type, rules for activating devices etc. Basically related to a pervasive system. I plan to design an ontology for this domain. The doubt in my mind is how should I populate the ontology with the information in the configuration file, as the configuration files are going to change every now and then. Earlier I was planning to use XML, so I can just read the configuration file at runtime and create an XML as per the XSD. Do we use the same technique for Ontologies? If yes then what is the format of the populated ontology? Thanks Chan

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