I know, I've been writing jdbc and hibernate daos before. Dariusz
-----Original Message----- From: Igor Vaynberg [mailto:[EMAIL PROTECTED] Sent: 12 September 2007 16:31 To: [email protected] Subject: Re: DataView paging it would be trivial to write a jdbc dao impl for the phonebook as well. -igor On 9/11/07, Holda, Dariusz <[EMAIL PROTECTED]> wrote: > > > Sorry for late response. I was dragged to another task. > Thanks for pointing me to the svn repository, it helped a lot. Shame I > can't use Hibernate or Ibatis as you do in your project. > > Thanks again, > Dariusz > > > -----Original Message----- > From: Igor Vaynberg [mailto:[EMAIL PROTECTED] > Sent: 31 August 2007 16:50 > To: [email protected] > Subject: Re: DataView paging > > you are holding on to the entire list in your data provider, this is > bad. > you should only load the pieces of your list you need. > > further your loadabledetachablemodel is broken since you hold on to the > actual object itself. loadabel detachable models are meant to hold on to > the > id, and in load() load the object from the database based on that id > > makes sense? see wicket-phonebook example in wicket-stuff svn. > > -igor > > > On 8/31/07, Holda, Dariusz <[EMAIL PROTECTED]> wrote: > > > > > > Hi, > > I'm using my implementation of a DataView to display list of objects > > that are own by another object. > > I wrote my IDataProvider and LoadableDetachableModel so I can page > > through the list - the list is quite long it can even have 5000, 6000 > > objects. > > I'm displaying 10 rows on each page. > > When I run application locally from my eclipse, everything is fine but > > when I run it on a server the delay during page changing is > significant > > e.g. 3 or more seconds. > > Could someone advise me on this issue? > > I'm attaching code snippets. > > > > class MyObjectDataProvider implements IDataProvider { > > > > private static final long serialVersionUID = > > -254289478999293765L; > > private List<MyObject> myObjects; > > > > public MyObjectDataProvider(List<MyObject> myObjects){ > > this.myObjects = myObjects; > > } > > > > public Iterator<MyObject> iterator(int first, int count) { > > return new > ArrayList<MyObject>(myObjects.subList(first, > > first+count)).iterator(); > > } > > > > public IModel model(Object arg0) { > > return new MyObjectModel((MyObject)arg0); > > } > > > > public int size() { > > return myObjects.size(); > > } > > > > public void setMyObjects( > > List<MyObject> myObjects) { > > this.myObjects = myObjects; > > } > > > > private final class MyObjectModel extends > > LoadableDetachableModel{ > > > > private static final long serialVersionUID = > > 8575601860619558208L; > > private MyObject psc; > > > > public MyObjectModel(MyObject psc){ > > this.psc = psc; > > } > > > > @Override > > protected Object load() { > > return psc; > > } > > > > @Override > > public int hashCode(){ > > return psc.hashCode(); > > } > > > > @Override > > public boolean equals(Object o){ > > if(this == o){ > > return true; > > } > > if(o instanceof MyObjectModel){ > > MyObjectModel that = (MyObjectModel)o; > > if(this.psc == null ? that.psc==null: > > this.psc.equals(that.psc)){ > > return true; > > } > > } > > return false; > > } > > } > > } > > > > class MyObjectDataView extends DataView { > > > > private static final long serialVersionUID = > > -5679706549137629007L; > > > > > > /** > > * Constructor. > > * > > * @param name of this Component > > * @param myObjectModel model containing list of MyObject > > objects > > */ > > public MyObjectDataView(String name, IDataProvider > > myObjectDataProvider) { > > super(name, myObjectDataProvider); > > } > > > > @Override > > protected void populateItem(Item item) { > > MyObject psc = (MyObject)item.getModelObject(); > > TextField field1 = new TextField("field1",new > > PropertyModel(psc,"field1")); > > site.setEnabled(false); > > > > TextField field2 = new TextField("field2",new > > PropertyModel(psc,"field2")); > > currency.setEnabled(false); > > > > item.add(field1); > > item.add(field2); > > item.add(new TextField("field3",new > > PropertyModel(psc,"field3")))); > > item.add(new TextField("field4",new > > PropertyModel(psc,"field4")))); > > item.add(new TextField("field5",new > > PropertyModel(psc,"field5")))); > > item.add(new CheckBox("field6",new > > PropertyModel(psc,"field6")))); > > } > > } > > > > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > - - > > - - - - - - - > > > > This message is intended only for the personal and confidential use of > the > > designated recipient(s) named above. 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