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  • Using runtime generic type reflection to build a smarter DAO

    - by kerry
    Have you ever wished you could get the runtime type of your generic class? I wonder why they didn’t put this in the language. It is possible, however, with reflection: Consider a data access object (DAO) (note: I had to use brackets b/c the arrows were messing with wordpress): public interface Identifiable { public Long getId(); } public interface Dao { public T findById(Long id); public void save(T obj); public void delete(T obj); } Using reflection, we can create a DAO implementation base class, HibernateDao, that will work for any object: import java.lang.reflect.Field; import java.lang.reflect.ParameterizedType; public class HibernateDao implements Dao { private final Class clazz; public HibernateDao(Session session) { // the magic ParameterizedType parameterizedType = (ParameterizedType) clazz.getGenericSuperclass(); return (Class) parameterizedType.getActualTypeArguments()[0]; } public T findById(Long id) { return session.get(clazz, id); } public void save(T obj) { session.saveOrUpdate(obj); } public void delete(T obj) { session.delete(obj); } } Then, all we have to do is extend from the class: public class BookDaoHibernateImpl extends HibernateDao { }

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  • Google I/O 2012 - Multi-Versioning Android User Interfaces

    Google I/O 2012 - Multi-Versioning Android User Interfaces Bruno Oliveira, Adam Powell This session will show you how to build user interfaces that work consistently across Android versions, from Eclair to today. We'll cover topics including the Action Bar, Fragments, style, size qualifiers, app structure, and navigation. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 1533 51 ratings Time: 48:22 More in Science & Technology

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  • Getting Started Plugging into the "Find in Projects" Dialog

    - by Geertjan
    In case you missed it amidst all the code in yesterday's blog entry, the "Find in Projects" dialog is now pluggable. I think that's really cool. The code yesterday gives you a complete example, but let's break it down a bit and deconstruct down to a very simple hello world scenario. We'll end up with as many extra tabs in the "Find in Projects" dialog as we need, for example, three in this case:  And clicking on any of those extra tabs will, in this simple example, simply show us this: Once we have that, we'll be able to continue adding small bits of code over the next few blog entries until we have something more useful. So, in this blog entry, you'll literally be able to display "Hello World" within a new tab in the "Find in Projects" dialog: import javax.swing.JComponent; import javax.swing.JLabel; import org.netbeans.spi.search.provider.SearchComposition; import org.netbeans.spi.search.provider.SearchProvider; import org.netbeans.spi.search.provider.SearchProvider.Presenter; import org.openide.NotificationLineSupport; import org.openide.util.lookup.ServiceProvider; @ServiceProvider(service = SearchProvider.class) public class ExampleSearchProvider1 extends SearchProvider { @Override public Presenter createPresenter(boolean replaceMode) { return new ExampleSearchPresenter(this); } @Override public boolean isReplaceSupported() { return false; } @Override public boolean isEnabled() { return true; } @Override public String getTitle() { return "Demo Extension 1"; } public class ExampleSearchPresenter extends SearchProvider.Presenter { private ExampleSearchPresenter(ExampleSearchProvider1 sp) { super(sp, true); } @Override public JComponent getForm() { return new JLabel("Hello World"); } @Override public SearchComposition composeSearch() { return null; } @Override public boolean isUsable(NotificationLineSupport nls) { return true; } } } That's it, not much code, works fine in NetBeans IDE 7.2 Beta, and is easier to digest than the big chunk from yesterday. If you make three classes like the above in a NetBeans module, and you install it, you'll have three new tabs in the "Find in Projects" dialog. The only required dependencies are Dialogs API, Lookup API, and Search in Projects API. Read the javadoc linked above and then in next blog entries we'll continue to build out something like the sample you saw in yesterday's blog entry.

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  • Expected time for an CakePHP MVC form/controller and db make up

    - by hephestos
    I would like to know, what is an average time for building a form in MVC pattern with for example CakePHP. I build 8 functions, two of them do custom queries, return json data, split them, expand them in a model in memory and delivers to the view. Those are three queries if you consider and an array to feed view for making some combo box. Why? all these, because I have data from json and I split them in order to make row of data like a table. Like that I changed a bit the edit.ctp but not a lot. And I created a javascript outside, with three functions. One collects data the other upon a change of a combo returnes the selected values, and does also some redirection flow. All this, in average how much time should it take ?

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  • What developer conferences are you going to this year?

    - by mbcrump
    This short list is what I consider to be the “cream-of-the-crop” in developer conferences. This is also a list of the conferences that I plan on attending in 2011. If you feel your conference is just as good, then shoot me an email at [michael[at]michaelcrump[dot]net, and if possible I will check it out.   In-Person Event Las Vegas on April 18th-22nd, 2011 Redmond on October 17th-21st, 2011 Orlando on December 5th-9th, 2011 Visual Studio Live – I attended this event in November of last year and blogged about my experience. I am also planning on going back to the Orlando session in December of this year. So what did I like the most about this event? Being able to interact one-on-one with a majority of the speakers. If you read my blog post then you will see a list of the speakers that I met up with. I also made a lot of great connections with other professional developers all over the world. They are having an event in Las Vegas on April 18th-22nd. I noticed at this event that they have added a new track on mobile. Being a big fan of mobile, I feel that this is a great move. They also have a great selection for Silverlight Developers including Billy Hollis and Rocky Lhotka. For the full lineup of conference tracks, sessions and speakers visit http://bit.ly/VSLiveTrks. If you are interested in this then you can register here by February 16th. I must add that you can save $300 bucks by getting the early-bird special.   Virtual Conference SSWUG (DBTechCon) - holds the largest virtual conference in the information technology industry. It is also special to me because they selected a majority of my Silverlight content for the April conference. No traveling fees and all of the sessions are recorded so you can watch them on-demand for $189 bucks (early-bird special). For the entire speaker list then click here. The session list has also been published. If you are interested in this then you can register here.   In-Person Event Knoxville, TN on June 3rd/4th 2011. Codestock.org – If you live in the South then you have heard of CodeStock. To my knowledge, they have only had 3 events so far and they were a huge success. It was such a success that after the last event, everyone was telling me how good it was and how much they enjoyed it. They currently have a call for speakers going on right now, so if you have sessions then be sure to submit yours. So, what makes them stand out? Well for starters Michael Neal (organizer) developed an open API so conference attendees could build their own apps for the sessions. They also encouraged their speakers to go to other sessions instead of stay in a “speaker-room”. Another cool feature is that they are uploading videos from the conference so everyone can benefit. They are currently looking for sponsorship, so help out if you can.   In-Person Event Redmond, WA on October 28/29 2011 *NOT 100% SURE AT THIS POINT* PDC 11 – OK, so the logo should be pdc11 but its not out yet. This event is located on Microsoft’s campus in Redmond, WA. It is probably one of the most well known conferences for developers to attend. One of the big perks from this event is that you typically come away with free stuff. In 2010 they gave away Windows 7 Phones. I remember years earlier they gave away laptops. This of course isn’t the only reason to go, you may get to tour the Microsoft campus. Since pdc is a huge event, you can view all the events for free. Mike Taulty created a nice Silverlight application that consumes the OData feed. You can download it here. If everything goes as planned, I will be at all of these events. If you plan on going then send me a tweet and we will do lunch or dinner. I love meeting new developers and talking .net.  Subscribe to my feed

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  • Google I/O 2012 - For Butter or Worse: Smoothing Out Performance in Android UIs

    Google I/O 2012 - For Butter or Worse: Smoothing Out Performance in Android UIs Chet Haase, Romain Guy Great user experience requires buttery smoothness in rendering and animating your interface; your app must have a good, consistent frame rate. This session deep-dives into our work on the Android framework to find and fix performance issues, along with tips on how you can do the same for your applications. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 4804 116 ratings Time: 58:50 More in Science & Technology

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  • Google BigQuery - Best Practices for Loading your Data and open Office Hours

    Google BigQuery - Best Practices for Loading your Data and open Office Hours Michael Manoochehri and Ryan Boyd from the DevRel team for cloud data services will be streaming to you live! They'll be discussing how to load your data into BigQuery and the various options available -- from commercial ETL tools to App Engine's Pipeline API and MapReduce frameworks, to simple UNIX command-line tools. They'll then open it up for a general office hours on ingestion and other topics. Please use the moderator link to ask your questions. From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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  • Java Spotlight Episode 101: JavaOne 2012 Part 2 - Community Events

    - by Roger Brinkley
    An interview with Martijn Verberg on Adopt A JSR, Nichole Scott and John Yeary on Community, and Hellena O'Dell on the Oracle Musical Festival about community events and happenings at JavaOne 2012. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes Events Sep 30-Oct 4, JavaONE, San Francisco Oct 3-4, Java Embedded @ JavaONE, San Francisco Oct 15-17, JAX London Oct 30-Nov 1, Arm TechCon, Santa Clara Oct 22-23, Freescale Technology Forum - Japan, Tokyo Oct 31, JFall, Netherlands Nov 2-3, JMagreb, Morocco Nov 13-17, Devoxx, Belgium Feature InterviewAdopt a JSR Adopt a JSR Home Adopt OpenJDK Home LJC's Adopt a JSR jClarity - Java Performance Tuning for the Cloud Community Events at JavaOne User Groups at Oracle World and JavaOne To access the Java User Group content on Sunday, go to the content catalog for JavaOne and filter the search criteria to Sunday sessions Oracle Music Festival

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  • Google I/O 2012 - App Engine Overview

    Google I/O 2012 - App Engine Overview Doug Orr, Jesse Jiang, Alexander Power Be the first to hear about the exciting new platform products which you can use to work better in the cloud. Discover how the Google Cloud Platform is expanding to meet your current and future needs. Learn how the over 150k developers in startups and businesses building mobile, games and modern web apps are already enjoying the benefits of the platform. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 1781 16 ratings Time: 54:04 More in Science & Technology

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