PrimeFaces How to represent Label insted of value in p:datatable cells

Question

hi every one I have this scenario :

i am using primefaces data table p:datatable and it receives a list from managed bean... please look for this sample : and pay attention to the header "status"

<p:datatable styleClass="table1" id="listTable" var="t" value="{testBean.elements}">
    <p:column headerText="Request No.">
       <h:outputText value="#{t.part_request_no}"></h:outputText>
    </p:column>
    <p:column headerText="Request No.">
       <h:outputText value="#{t.part_request_date}"></h:outputText>
    </p:column>
    <!--please pay attention here -->
    <p:column headerText="status">
        <h:outputText value="#{t.part_status}"></h:outputText>
    </p:column>
</p:datatable>

the result looks like : this

Request No.  | Request Date | Status |
    1        |   2013-02-02 |   1    |
    2        |   2013-01-01 |   2    |
    3        |  2013-4-23   |   5    |

my Question is : representing 1, 2, 5 is a shame. so i prefer to view statuses like

1 : New
2 : Rejected
5 : Canceled.

the result i require to be like this

Request No.  | Request Date | Status   |
    1        |   2013-02-02 |   New    |
    2        |   2013-01-01 | Rejected |
    3        |   2013-4-23  | Canceled |

any ideas ???? thank you ....

display the field with name? how should WE know what YOUR objects have? — Danubian Sailor, Mar 20 '13 at 12:07
I don't think this transformation should be done in presentation layer of application, but rather in business logic. Use `eunum` or constants or create database table to hold this mapping. — partlov, Mar 20 '13 at 12:09
aha .... i know about using the database and managed bean but i thought there are solution in primefaces ....thanks for your answer parlov ... :) — abu taha9, Mar 20 '13 at 12:12

score 2 · Accepted Answer · answered Mar 20 '13 at 13:58

There are several ways depending on how and where you'd like to maintain the mapping between status codes and associated descriptions.

Hardcoded in view.

<h:outputText value="New" rendered="#{t.part_status == 1}" />
<h:outputText value="Rejected" rendered="#{t.part_status == 2}" />
<h:outputText value="Cancelled" rendered="#{t.part_status == 5}" />

Hardcoded in a map.

@ManagedBean
@ApplicationScoped
public class Data {

    private static final Map<Long, String> STATUSES = createStatuses();

    private static Map<Long, String> createStatuses() {
        Map<Long, String> statuses = new HashMap<Long, String>();
        statuses.put(1L, "New");
        statuses.put(2L, "Rejected");
        statuses.put(5L, "Cancelled");
        return Collections.unmodifiableMap(statuses);
    }

    public Map<Long, String> getStatuses() {
        return STATUSES;
    }

}

with

<h:outputText value="#{data.statuses[t.part_status]}" />

Definied in a loclaized resource bundle file.

status.1 = New
status.2 = Rejected
status.5 = Cancelled

with

<f:loadBundle basename="com.example.i18n.text" var="text" />
...
<c:set var="statusKey" value="status.#{t.part_status}" />
<h:outputText value="#{text[statusKey]}" />

Definied in an enum.

public enum Status {

    New(1), Rejected(2), Cancelled(5);

    private int code;

    private Status(int code) {
        this.code = code;
    }

    public static Status of(int code) {
        for (Status status : values()) {
            if (status.code == code) {
                return status;
            }
        }
        throw new IllegalArgumentException();
    }

    public int getCode() { 
        return code;
    }

}

and during populating the model

t.setPart_status(Status.of(statusCode));

and then just in the view

<h:outputText value="#{t.part_status}" />

A combination can also. E.g. i18n label in enum.

Unrelated to the concrete problem, I'd work on your Java naming conventions. part_status is not a valid property name. It should be partStatus.

score 0 · Answer 2 · answered Mar 20 '13 at 12:09

Why don't you just simply create a method in you ManagedBean to convert it to the label you want?

<p:column headerText="status">
    <h:outputText value="#{testBean.getStatusLabel(t.part_status)}"/>
</p:column>

And on the ManagedBean:

public String getStatusLabel(int code){
    // Do your thing here...
}

PrimeFaces How to represent Label insted of value in p:datatable cells

2 Answers2