Custom sorting in <rich:scrollableDataTable>

[nprajeshgowda]

Hello,

i am a new bie in richfaces, i use richfaces 3.3.1

i used rich:scrollableDataTable in my application and used the default sorting to sort columns which sorts column based on the datatype of the column

Now i have a column whose datatype is String, i have the following data

ABC

ABC1

ABC2

ABC10

ABC12

ABC3

After sorting i get

ABC

ABC1

ABC10

ABC12

ABC2

ABC3

Which is not my intention, i would like to sort the column like the below,

ABC

ABC1

ABC2

ABC3

ABC10

ABC12

How can i achieve this ?????

Thanks in advance.

rAj.

[ilya_shaikovsky]

define your comparator using column attribute.

[nprajeshgowda]

i used the comparator like below,

<rich:scrollableDataTable id="subnw" height="400px" width="700px" rows="30"

value="#{dataTableScrollerBean.allCars}" var="category">

<rich:column sortExpression="#{category.makeComparator}" id="make">

<f:facet name="header">Mak</f:facet>

<h:outputText value="#{category.make}" />

</rich:column>

Now the question is where should i have the comparator ???

i had kept it in the backingbean, i had a property which is a comparator. is my assumption correct ????

still the sorting is not working.

BR,

rAj

[nprajeshgowda]

i got it working :-)

i used it like the following,

<rich:scrollableDataTable id="subnw" height="400px" width="700px" rows="30"

value="#{dataTableScrollerBean.allCars}" var="category">

<rich:column sortExpression="#{dataTableScrollerBean.makeComparator}" id="make">

<f:facet name="header">Mak</f:facet>

<h:outputText value="#{category.make}" />

</rich:column>

where i have written the comparator in my bbean.

BR,

Rajesh

[liuhongqian77]

Hi Rajesh,

I have the same question but I'm not sure how to implement the comparator method.

Can you please post your method dataTableScrollerBean.makeComparator() here? Thanks.

Hongqian Liu

[nprajeshgowda]

Hello Liu,

Following is a sample code...hope it helps you.

public class MakeComparator implements Comparator<ManagedObject>,Serializable{

    /**

           *  Serializable

           */

          private static final long serialVersionUID = -8957009177209642023L;

          //Argument can be of what ever type you would like to compare

          public int compare(String o1, String o2) {

        //Implement your custom comparator here

        if(o1.compareTo(o2)>1){

            return 1;

        }else if(o1.compareTo(o2)<1){

            return 1;

        }else{

            return 0;

        }

    }

}

And in the bean

public MakeComparator getKeyComparator() {

        return keyComparator;

    }

    public void setKeyComparator(MakeComparator keyComparator) {

        this.keyComparator = keyComparator;

    }

BR,

Rajesh