BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Requirements for Object Persistence Goto page 1, 2  Next          BorlandTalk.com Forum Index -> Delphi Non-Technical View previous topic :: View next topic   Author Message listmember Guest Posted: Sun Jul 24, 2005 8:08 pm    Post subject: Requirements for Object Persistence I would like to know what extra is needed for Object Persistence and why it hasn't been made part of Delphi? Is it because experts have not agreed on how to do it, or what? Back to top Joanna Carter (TeamB) Guest Posted: Sun Jul 24, 2005 8:22 pm    Post subject: Re: Requirements for Object Persistence "listmember" <listmember (AT) letterboxes (DOT) org> a écrit dans le message de news: [email]xn0e552j751ylr001 (AT) forums (DOT) borland.com[/email]... Quote: I would like to know what extra is needed for Object Persistence and why it hasn't been made part of Delphi? Is it because experts have not agreed on how to do it, or what? Borland have now included Bold or ECO in their high-end versions, but these are much more than persistence mechanisms. However if you want to find out about some of us have built our own OPFs, then wander over to the oodesign group and search for old messages, there are plenty of good discussions on what you need to allow Delphi to support an OPF. Joanna -- Joanna Carter (TeamB) Consultant Software Engineer TeamBUG support for UK-BUG TeamMM support for ModelMaker Back to top listmember Guest Posted: Sun Jul 24, 2005 8:27 pm    Post subject: Re: Requirements for Object Persistence Joanna Carter (TeamB) wrote: Quote: "listmember" <listmember (AT) letterboxes (DOT) org> a icrit dans le message de I would like to know what extra is needed for Object Persistence and why it hasn't been made part of Delphi? Is it because experts have not agreed on how to do it, or what? Borland have now included Bold or ECO in their high-end versions, but these are much more than persistence mechanisms. However if you want to find out about some of us have built our own OPFs, then wander over to the oodesign group and search for old messages, there are plenty of good discussions on what you need to allow Delphi to support an OPF. Hi Joanna, I have seen a few attempts and all of them felt like workarounds, bit like home-made dynamic arrays before Delphi supported them natively. So, my question is actually more about what is it that needs to be added to *Delphi* itself to facilitate people's OPF attempts to feel at home. Cheers, Adem Back to top John Jacobson aka Captain Guest Posted: Sun Jul 24, 2005 8:36 pm    Post subject: Re: Requirements for Object Persistence listmember <listmember (AT) letterboxes (DOT) org> wrote in message <xn0e552j751ylr001 (AT) forums (DOT) borland.com> Quote: I would like to know what extra is needed for Object Persistence and why it hasn't been made part of Delphi? Is it because experts have not agreed on how to do it, or what? ECO. -- Everything in this post is mere opinion. It might be very well formed opinion based on an uncanny grasp of the facts, but it remains opinion nevertheless. Here's where you'll find Absolute Truth: http://blogs.slcdug.org/jjacobson/ Posted with Reader3000-BETA 0.9.4.1031 Back to top Bob Dawson Guest Posted: Sun Jul 24, 2005 8:41 pm    Post subject: Re: Requirements for Object Persistence "listmember" wrote Quote: I would like to know what extra is needed for Object Persistence and why it hasn't been made part of Delphi? Is it because experts have not agreed on how to do it, or what? In some ways you could say that an OPF is like a pattern: there are lots of specific ways to build one, and each is going to have advantages and disadvantages. Bold and Back to top Bob Dawson Guest Posted: Sun Jul 24, 2005 8:48 pm    Post subject: Re: Requirements for Object Persistence "listmember" wrote Quote: my question is actually more about what is it that needs to be added to *Delphi* itself to facilitate people's OPF attempts to feel at home. Not much. IMHO the three biggest design feature constraints in Delphi's OO model from an OPF writer's point of view are weaknesses in RTTI lack of class vars and class constructors differing lifetime semantics for interfaces and objects. These are largely win32 issues. All are addressed in .NET, though some less elegantly than others. And I believe some will be addressed in win32 eventually bobD Back to top listmember Guest Posted: Sun Jul 24, 2005 8:58 pm    Post subject: Re: Requirements for Object Persistence John Jacobson aka Captain Jake wrote: Quote: listmember <listmember (AT) letterboxes (DOT) org> wrote in message [email]xn0e552j751ylr001 (AT) forums (DOT) borland.com[/email] I would like to know what extra is needed for Object Persistence and why it hasn't been made part of Delphi? Is it because experts have not agreed on how to do it, or what? ECO. ECO is not an integral *part* of Delphi. Back to top Atle Smelvær Guest Posted: Sun Jul 24, 2005 9:10 pm    Post subject: Re: Requirements for Object Persistence Why don't you just use OmniXML or some of the other free persistence tools out there. Then just publish all properties you want to be saved and use TOmniXMLReader and TOmniXMLWriter to write and save objects. I did some adjustments on the OmniXML code so it could handle object references also. So it is now very mutch like the "serializable" feature in ..NET -Atle Back to top Peter Morris [Droopy eyes Guest Posted: Sun Jul 24, 2005 9:19 pm    Post subject: Re: Requirements for Object Persistence Quote: So, my question is actually more about what is it that needs to be added to *Delphi* itself to facilitate people's OPF attempts to feel at home. Nothing, it has already been added in the form of Bold and ECO. Back to top Peter Morris [Droopy eyes Guest Posted: Sun Jul 24, 2005 9:20 pm    Post subject: Re: Requirements for Object Persistence Quote: ECO is not an integral *part* of Delphi. It is if you buy Architect. Are you saying that the DB stuff that comes with Enterprise is not an integral *part* of Delphi either? -- Pete ==== ECO Modeler, Audio compression components, DIB graphics controls, FastStrings http://www.droopyeyes.com Read or write articles on just about anything http://www.HowToDoThings.com My blog http://blogs.slcdug.org/petermorris/ Back to top listmember Guest Posted: Sun Jul 24, 2005 9:46 pm    Post subject: Re: Requirements for Object Persistence Peter Morris [Droopy eyes software] wrote: Quote: ECO is not an integral part of Delphi. It is if you buy Architect. Are you saying that the DB stuff that comes with Enterprise is not an integral part of Delphi either? TDataset stuff is. Anyway, what I was wondering whether it was something to do with the RTL --that you can only serialize published properties. And, whether we should have a property modifier such as 'serialize', much like 'stored' etc. Back to top listmember Guest Posted: Sun Jul 24, 2005 9:51 pm    Post subject: Re: Requirements for Object Persistence Atle Smelvfr wrote: Quote: Why don't you just use OmniXML or some of the other free persistence tools out there. Then just publish all properties you want to be saved and use TOmniXMLReader and TOmniXMLWriter to write and save objects. This is the thing that makes it feel like a tacky add-on. Why can I only serialize published properties --why not the others too? Why do *I* have to write extra code to be able to do that; if only we could have a property modifier such as 'serializable' that came into action when you're serializing the class. Quote: I did some adjustments on the OmniXML code so it could handle object references also. So it is now very mutch like the "serializable" feature in .NET In the past I have had so much fun trying to cover all sorts of classes with it, it was painful. It wasn't OmniXML's fault, though. Back to top Henry Guest Posted: Sun Jul 24, 2005 11:11 pm    Post subject: Re: Requirements for Object Persistence listmember wrote: Quote: I would like to know what extra is needed for Object Persistence and why it hasn't been made part of Delphi? Is it because experts have not agreed on how to do it, or what? See earlier thread "OOP in database programming" Back to top Lauchlan M Guest Posted: Sun Jul 24, 2005 11:18 pm    Post subject: Re: Requirements for Object Persistence Quote: I would like to know what extra is needed for Object Persistence and why it hasn't been made part of Delphi? Is it because experts have not agreed on how to do it, or what? ECO. For Win32. Lauchlan M Back to top Dave Nottage [TeamB] Guest Posted: Mon Jul 25, 2005 12:19 am    Post subject: Re: Requirements for Object Persistence listmember wrote: Quote: ECO. ECO is not an integral part of Delphi. What exactly do you expect to be integrated, and in what manner? -- Dave Nottage [TeamB] Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Non-Technical All times are GMT Goto page 1, 2  Next Page 1 of 2   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.