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• xerces serialization in Java 6

  - by Jim Garrison

  In Java 6, the entire xerces XML parser/serializer implementation is now in the Java runtime (rt.jar). The packages have been moved under the com.sun.* namespace, which places them off-limits for explicit reference within client code. This is not a problem when using the parser, which is instantiated via javax API-defined factories. However, our code also uses xerces serialization (org.apache.xml.serialize.* ). AFAICT, there are no javax.xml API-defined factories for creating instances of Serializer and OutputFormat. This seems to imply that the only way to get one is to explicitly call the com.sun.org.apache.xml.serialize.* APIs. I've found the serialization classes in javax.xml.stream, but they don't seem to provide any output-formatting control like the xerces OutputFormat class. Question: Is there a way to access the xerces serialization functionality (which is in rt.jar) via a javax standard API, without including xerces.jar and also without explicitly instantiating com.sun.* classes? If not, is there an javax API-compliant way to achieve the same effect?

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• SSIS Script Component Testing Strategy

  - by Paul Kohler

  This question is in respect to the script component specifically. I am aware of ssisUnit etc… With simple SSIS Scripts Components, it’s sufficient to let basic testing flesh out issues, however I am working with a script that has grown in complexity over time. To better test the functionality I am considering abstracting the script logic into a DLL that gets deployed with the package, and then use the custom component in the script. The advantage is that the function will be more testable etc but it’s one more deployment artefact that needs to be managed. My question is, does anyone know of a better way to test such an SSIS script in a more isolated manner than to run the whole package and examine the output?

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• How do I initialize attributes when I instantiate objects in Rails?

  - by nfm

  Clients have many Invoices. Invoices have a number attribute that I want to initialize by incrementing the client's previous invoice number. For example: @client = Client.find(1) @client.last_invoice_number > 14 @invoice = @client.invoices.build @invoice.number > 15 I want to get this functionality into my Invoice model, but I'm not sure how to. Here's what I'm imagining the code to be like: class Invoice < ActiveRecord::Base ... def initialize(attributes = {}) client = Client.find(attributes[:client_id]) attributes[:number] = client.last_invoice_number + 1 client.update_attributes(:last_invoice_number => client.last_invoice_number + 1) end end However, attributes[:client_id] isn't set when I call @client.invoices.build. How and when is the invoice's client_id initialized, and when can I use it to initialize the invoice's number? Can I get this logic into the model, or will I have to put it in the controller?

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• stylesheet_link_tag producing absolute links instead of relative

  - by mathee

  I set up facebooker to tunnel my Ruby on Rails application. The issue is that I would like to test locally. That is, I don't want to have to start a tunnel every time I want to see my changes. Right now, when I start the application using ruby script/server (not calling rake facebooker:tunnel:background_start beforehand), links created by helpers (e.g., stylesheet_link_tag, javascript_include_tag, image_tag) are prepended with my tunnlr address: http://web1.tunnlr.com:myPort/. (For example, a CSS link looks like this in the page source: http://web1.tunnlr.com:myPort//stylesheets/appName.css?1234567890.) I don't want that functionality; I can't see my CSS or JavaScript changes without having to start the tunnel first. I want the links to be relative, not absolute. So, stylesheet_link_tag should produce /stylesheets/appName.css?1234567890. Does anyone know why it's doing that in the first place and how to fix it? Thanks in advance.

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• .NET Process.Start() on an executable on a remote system - security warning?

  - by BrettRobi

  I've created a Windows Service that accepts commands from remote machines via WCF. One of those commands is to run a specified executable (let's ignore the security implications of such functionality). In my Service I am using Process.Start() to run the executable. All works well if the executable is local to the machine, but if it is on a remote file share it is failing with no error (or more accurately just hanging). I suspect the problem is that it is triggering the standard Windows 'Unverified Publisher' warning that one would see if they double click an exe on a remote system. Is there any way I can bypass this from my service so that I can truly run any executable? As I said I understand the security implications of allowing it to run any executable, but this is really what I need. I would have thought this warning was only a user mode concept, but it really does seem to be getting in the way of my Service. Ideas?

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• Change input text to regular text on blur and ability to edit jQuery

  - by eknown

  I'm creating a form where I'm eliminating the use of a save button. The form is made up of input text boxes and textareas. After the user enters data into the input field, I want to trigger an onBlur function and change the input into a span that contains the information that the user entered. I also want to have the ability to edit this information, so if the user clicks on the newly created span with text, it will turn back into the input field with the current information for their editing pleasure. For reference, I'm looking to have a functionality pretty much like on editing a photo title on Flickr. If possible, I'd also like to have the textbox show "saving..." for half a second after the blur to reflect interaction with server.

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• GIS: When and why to use ArcObjects over GDAL programming to work with ArcGIS rasters and vectors?

  - by anotherobject

  Im just starting off with GDAL + python to support operations that cannot be done with ArcGIS python geoprocessing scripting. Mainly I am doing spatial modeling/analysis/editing of raster and vector data. I am a bit confused when ArcObject development is required versus when GDAL can be used? Is there functionality of ArcObjects that GDAL does not do? Is the opposite true too? I am assuming that ArcObjects are more useful in developing online tools versus Desktop analysis and modeling where the difference is more to do with preference? In my case i prefer GDAL because of python support, which I believe ArcObjects lack. thanks!

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• Linq to SQL Where clause based on field selected at runtime

  - by robasaurus

  I'm trying to create a simple reusable search using LINQ to SQL. I pass in a list of words entered in a search box. The results are then filtered based on this criteria. private IQueryable<User> BasicNameSearch(IQueryable<User> usersToSearch, ICollection<string> individualWordsFromSearch) { return usersToSearch .Where(user => individualWordsFromSearch.Contains(user.Forename.ToLower()) || individualWordsFromSearch.Contains(user.Surname.ToLower())); } Now I want this same search functionality on a different datasource and want to dynamically select the fields to apply the search to. For instance instead of IQueryable of Users I may have an IQueryable of Cars and instead of firstname and surname the search goes off Make and Model. Basically the goal is to reuse the search logic by dynamically selecting what to search on at runtime.

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• How to get Screen Shot / Screen Capture from Web user on MVC site?

  - by RSolberg

  I've seen a few different apps that allow users to take screen shots on their PC and then the utility will automatically upload the image to the web server. I'd like to incorporate this type of functionality into a new MVC site. I could certainly just allow the user to upload their own image, but it'd be cleaner if they could click Capture Screen Shot and the image would be uploaded automatically. My team is using ASP.NET MVC2 with a SQL back end database. We are certainly willing to look into 3rd party components (activeX based, etc.) that will allow us to achieve this.

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• Why JavaScript dialogs (alert/prompt/confirm) are not widely used and not under active development?

  - by serg555

  If there is a need to display some simple confirmation popup, most developers would rather install jQuery, find some dialog plugin for it, skin it, than put a one liner: if(confirm("Are you sure?")) { ... } Using alert() for displaying error messages is considered cheap. And how many sites can you name that are usingprompt()? So, the question is: Is there something wrong with those dialogs so they should be avoided? Yes they have (very) limited functionality and customization, but when you don't need anything fancy, is using js dialogs still a bad practice? Why these dialogs haven't seen any improvement in past 10 years (probably longer) and none is planned for near future? Wouldn't it be nice to have native js access to fully customizable desktop-level dialogs? At least adding error/warning/info type of dialogs and adding ability to customize button captions would be a big help.

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• When to use a module, and when to use a class

  - by Matt Briggs

  I am currently working through the Gregory Brown Ruby Best Practices book. Early on, he is talking about refactoring some functionality from helper methods on a related class, to some methods on module, then had the module extend self. Hadn't seen that before, after a quick google, found out that extend self on a module lets methods defined on the module see each other, which makes sense. Now, my question is when would you do something like this module StyleParser extend self def process(text) ... end def style_tag?(text) ... end end and then refer to it in tests with @parser = Prawn::Document::Text::StyleParser as opposed to just using a class with some class methods on it? is it so that you can use it as a mixin? or are there other reasons I'm not seeing?

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• Image surrounded by text in WPF

  - by niao

  Greetings, I have some control which display bunch of textblocks and image. I would like the image to be surrounded by text. I have already implemented some functionality by using FlowDocument and custom bindable run control. (These controls are included inside user control). When I generate lots of these controls in treeview, application goes into infinite loop. I asked on forums before about this problem and the answer was that it can be WPF issue. Howver when I removed bindable run from my user control, problem dissappeared. Now I am trying to implement other solution where image will be surrounded by text. Can someone please help me? EDIT: Generally i would like to achieve something like this

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• Implementing auto-save in WPF / MVVM / NHibernate

  - by Echiban

  My client likes programs like Microsoft OneNote where changes are saved automatically, and he can choose to discard when he explicitly wants to do so. I will have to implement some undo functionality, but I'll figure that out some other time. With NHibernate, I suppose I can call ISession.Update on every single property / binding change, but I can see real pain with this approach down the road. I am not a fan of timers, but maybe a 5 second timer that starts on property / binding change and at timer end use BackgroundWorker thread to save to db. What do you think?

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• Pull down UIToolbar above UIWebView inside UIScrollView

  - by Nick VanderPyle

  I'd like to display a toolbar above a UIWebView but hide the toolbar until the person "pulls it down". The same functionality can be seen in Safari on the iPhone. When the page loads, the toolbar containing the address is hidden. You must pull it down. In Safari it's possible to scroll up and eventually see the toolbar or scroll down through the page contents. I've tried placing a UIToolbar and UIWebView inside a UIScrollView but it didn't work. I've tried setting the UIScrollView to the size of the toolbar and webview combined, but that didn't work. - (void)viewDidLoad{ CGSize size = CGSizeMake(webView.frame.size.width, toolBar.frame.size.height + webView.frame.size.height); [scrollView setContentSize:size]; } How should I go about doing this?

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• PHP, include with parameters

  - by chris

  hi! I have a PHP-file which will be called from a form. So it gets parameters over $_GET. Now I need the exact same functionality of this file, but not in such a form-call. I will include it in normal code with fixed parameters (which normally come from the form). So my file can work with the form AND without it. I know only the way with include and setting the $_GET in front of it. But I am not sure this is the most elegant way (I dont like the idea of setting things like $_GET). any other ways of doing this? br, chris

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• Unregistering a COM wrapped .NET assembly

  - by flopdix

  I created a COM exposed .NET 2.0 dll and registered with my windows operating system using 'regasm' and 'gacutil' (in GAC). Then I tried to call this component from my classic ASP page. It worked fine. But, I need to change the functionality of my assembly. I unregistered it again using 'regasm' and 'gacutil' (from GAC) utilities and copied my new .NET DLL and registered again (This time using a new version of the DLL). For some reason, i still have a pointer to my old assembly and new calls to the DLL from ASP page are not working. Any Ideas on what process i need to follow to ensure that all the references to the old version are completely removed? I appreciate any help.

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• GAE Having Tasks generate pages for user

  - by mellort

  I have a web app that I would like to have the following functionality: user gives a url webapp gets json data from that url and others from same website (this can take anywhere from 1-10 seconds) webapp uses data to generate page for user With this approach, I believe that if the server is in the process of getting the data for one user, then the other user won't be able to load the page (server busy). I would like to avoid this if possible. It seems like the Google Tasks API would be useful for this, but I don't see how I can run the task, and then use the output of the task to generate the page (how would the main app know when the task was finished?) What is the best way to resolve this? Thanks in advance

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• CString error, 'CString': is not a member of 'ATL::CStringT<BaseType, StringTraits>'

  - by flavour404

  Hi, I am trying to do this: #include <atlstr.h> CHAR Filename; // [sp+26Ch] [bp-110h]@1 char v31; // [sp+36Ch] [bp-10h]@1 int v32; // [sp+378h] [bp-4h]@1 GetModuleFileNameA(0, &Filename, 0x100u); CString::CString(&v31, &Filename); But I am getting the compiler error C2039:'CString': is not a member of 'ATL::CStringT' This is a non MFC based dll, but according to the docs you should be able to use CString functionality with the include #include atlstr.h how do I make it work? Thanks

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• Silverlight Issue : Save in Jpeg format

  - by Amit

  Hi All, I am new to Silverlight. We are working on silverlight 3.0. I want to implement a functionality that specific part of the file like stack panel or grid needs to be export or print to the image format. I mean when i click on specific button then that part of the application needs to export in image format. My first question is, Is it possible to implement it in Silverlight3.0? Or funcitonality is in Silverlight4.0. Can anyone please replay ASAP? Thanks, Amit

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• SQL Server 2008 - Script Data as Insert Statements from SSIS Package

  - by Brandon King

  SQL Server 2008 provides the ability to script data as Insert statements using the Generate Scripts option in Management Studio. Is it possible to access the same functionality from within a SSIS package? Here's what I'm trying to accomplish... I have a scheduled job that nightly scripts out all the schema and data for a SQL Server 2008 database and then uses the script to create a "mirror copy" SQLCE 3.5 database. I've been using Narayana Vyas Kondreddi's sp_generate_inserts stored procedure to accomplish this, but it has problems with some datatypes and greater-than-4K columns (holdovers from SQL Server 2000 days). The Script Data function looks like it could solve my problems, if only I could automate it. Any suggestions?

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• Unescape _xHHHH_ XML escape sequences using Python

  - by John Machin

  I'm using Python 2.x [not negotiable] to read XML documents [created by others] that allow the content of many elements to contain characters that are not valid XML characters by escaping them using the _xHHHH_ convention e.g. ASCII BEL aka U+0007 is represented by the 7-character sequence u"_x0007_". Neither the functionality that allows representation of any old character in the document nor the manner of escaping is negotiable. I'm parsing the documents using cElementTree or lxml [semi-negotiable]. Here is my best attempt at unescapeing the parser output as efficiently as possible: import re def unescape(s, subber=re.compile(r'_x[0-9A-Fa-f]{4,4}_').sub, repl=lambda mobj: unichr(int(mobj.group(0)[2:6], 16)), ): if "_" in s: return subber(repl, s) return s The above is biassed by observing a very low frequency of "_" in typical text and a better-than-doubling of speed by avoiding the regex apparatus where possible. The question: Any better ideas out there?

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• creating a wrapper around a 3rd party assembly - swap out and decouple

  - by mrblah

  I have an email component that I am integrating into my application, looking for some tips on how should build a wrapper around it so I can swap it out with another 3rd party component if needed. My approach right now is it: build an interface will the functionality I need. create a class that implements the interface, using my 3rd party component inside this class. any usage of this component will be via the interface so like: IPop3 pop3 = new AcmeIncePop3Wrapper(); pop3.connect(); and inside AcmeIncePop3Wrapper will be: public void connect() { AcmeIncePop3 pop = new AcmeIncePop3(); pop.connect(); } Is that a good approach? I could probably add another abstraction by using ninject so I could swap out implementations, but really this seems to be all I need as i don't expect to be changing 3rd party assemblies every day, just don't want to make things so tightly coupled.

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• How do I authenticate a Twitter user and access the API without leaving my iPhone app?

  - by thebossman

  I'd like to allow users to send out Tweets from my iPhone app. That's all the functionality I need at the moment. From what I know of the Twitter API, there's a standard authentication mechanism, which allows the developer to include the user's name and password in the request string that the application sends to Twitter. This method will no longer be supported come June 30, 2010. Given the timeframe, the better other choice is oAuth. One of the caveats of oAuth is that it requires a UIWebView to pop up within the app to allow the user to enter his or her credentials or a PIN number. None of the Twitter apps on my phone do this, however: Tweetie, TweetDeck and Twitterific. I assume they're using the first authentication method, but it seems like Twitter wouldn't deprecate an API that would hurt the user experience across the board. There must be an alternative method--what am I missing?

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• String Utility Library for Code Generation

  - by Adam Barney

  CodeSmith has a nice StringUtils class that can be used to change database object names to singular, plural, camel case, pascal case, etc... Very useful for creating data access layers in their code generation tool. I'm trying to port some CodeSmith templates to the T4 template files used by Visual Studio, and I'm trying to find a similar library to do these things. There must be one somewhere in T4, since that's what is used to produce the LINQ to SQL classes, and it does a nice job of pluralization / singularization. Does anyone know where this library exists, or if a free library with similar functionality exists somewhere? Thanks!

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• Rails accepts_nested_attributes_for callbacks

  - by Rabbott

  I have two models Ticket and TicketComment, the TicketComment is a child of Ticket. ticket.rb class Ticket < ActiveRecord::Base has_many :ticket_comments, :dependent => :destroy, :order => 'created_at DESC' # allow the ticket comments to be created from within a ticket form accepts_nested_attributes_for :ticket_comments, :reject_if => proc { |attributes| attributes['comment'].blank? } end ticket_comment.rb class TicketComment < ActiveRecord::Base belongs_to :ticket validates_presence_of :comment end What I want to do is mimic the functionality in Trac, where if a user makes a change to the ticket, and/or adds a comment, an email is sent to the people assigned to the ticket. I want to use an after_update or after_save callback, so that I know the information was all saved before I send out emails. How can I detect changes to the model (ticket.changes) as well as whether a new comment was created or not (ticket.comments) and send this update (x changes to y, user added comment 'text') in ONE email in a callback method?

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