6 Replies Latest reply on Jul 31, 2012 3:13 AM by sabarinathsss

How do you make rich:datascroller do true pagination?

sabarinathsss Jun 1, 2012 11:23 PM

I m using rich:dataScroller with rich:dataTable in RichFaces 4.2.2.

rich:dataScroller expects the entire list to be loaded in memory.

Is there a way to change this behavior?

Please help me.

Thanks

Advance

1. Re: How do you make rich:datascroller do true pagination?

mcmurdosound Jun 2, 2012 3:35 AM (in response to sabarinathsss)

you have to look at the examples.

http://showcase.richfaces.org/richfaces/component-sample.jsf?demo=dataTable&sample=arrangeableModel&skin=blueSky
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2. Re: How do you make rich:datascroller do true pagination?

sabarinathsss Jul 17, 2012 9:16 AM (in response to mcmurdosound)

Hi

In this "http://showcase.richfaces.org/richfaces/component-sample.jsf?demo=dataTable&sample=arrangeableModel&skin=blueSky" example they use only one entity class and they select the values from one table and return as Entity class.

@Override
    public void walk(FacesContext context, DataVisitor visitor, Range range, Object argument) {
        CriteriaQuery<T> criteriaQuery = createSelectCriteriaQuery();
        TypedQuery<T> query = entityManager.createQuery(criteriaQuery);

        SequenceRange sequenceRange = (SequenceRange) range;
        if (sequenceRange.getFirstRow() >= 0 && sequenceRange.getRows() > 0) {
            query.setFirstResult(sequenceRange.getFirstRow());
            query.setMaxResults(sequenceRange.getRows());
        }

        List<T> data = query.getResultList();
        for (T t : data) {
            visitor.process(context, getId(t), argument);
        }
    }
So in walk method they use the primary key(rowkey) value from the result set and call the getRowData().

But i need to select values from multiple tables(join multiple tables) and return it as ArrayList<HashMap>.

Here how can i do true pagination?

Regards
Sabarinath
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3. Re: How do you make rich:datascroller do true pagination?

sivaprasad9394 Jul 19, 2012 9:25 AM (in response to sabarinathsss)

Hi,

You just create getter setter in one single class for remaining table select values.and assign it to the getter setter methods to form a List<ClassName> like arratyList.

OR

Create object inside the single classExample,
ClassA inside create classB,ClassC,ClassD objects and assign the select ouery values for that,First time it comes like Obj[0],Obj[1]... like u can create and type cast the object to defined class type and add into the base ArryList.
Like,example

PaymentData dataObj = new PaymentData();
dataObj.set...();
dataObj.set...();
MoneyData moneyObj = new MoneyData();
moneyObj.set...();

dataObj.add(moneyObj);
Like u can add alla the array list class to dataObj object and return it to the screen.

It will work as you expected...

Thanks,
Siva
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4. Re: How do you make rich:datascroller do true pagination?

sabarinathsss Jul 19, 2012 9:36 AM (in response to sivaprasad9394)

Hi sivaprasad krishnaswamy,

Thanks for your reply .

Can you please provide the detailed example .
And here how can i override the walk method for true pagination?

Thanks,
Sabarinath
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5. Re: How do you make rich:datascroller do true pagination?

sivaprasad9394 Jul 19, 2012 9:47 AM (in response to sabarinathsss)

Please go through the document ,

https://community.jboss.org/thread/6805
https://community.jboss.org/thread/165635

Thanks,
Siva
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6. Re: How do you make rich:datascroller do true pagination?

sabarinathsss Jul 31, 2012 3:13 AM (in response to sivaprasad9394)

Hi

I m tried the true pagination by using the above example provided in https://community.jboss.org/thread/165635.

Now " getRowCount()" method is called more number of times.

In which order or how the methods [setRowKey,getRowKey,walk,isRowAvailable,getRowCount,getRowData,getRowIndex,setRowIndex ]
are executed?

Thanks ,
Sabarinath.
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