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"))));
}
}
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