Jonathan Lalou's blog

Abstract

Sometimes, the filter function in Primefaces <p:datatable/> does not work when the field on which filtering is operated typed as an enum.

Explanation

Actually, in order to filter, Primefaces relies on a direct '=' comparison. The hack to fix this issue is to force Primefaces to compare on the enum name, and not by a reference check.

Quick fix

In the enum class, add the following block:

public String getName(){ return name(); }

Have the datatable declaration to look like:

<p:dataTable id="castorsDT" var="castor" value="#{managedCastorListManagedBean.initiatedCastors}" widgetVar="castorsTable" filteredValue="#{managedCastorListManagedBean.filteredCastors}">

Declare the enum-filtered column lke this:

<p:column sortBy="#{castor.castorWorkflowStatus}" filterable="true" filterBy="#{castor.castorWorkflowStatus.name}" filterMatchMode="in">
  <f:facet name="filter">
    <p:selectCheckboxMenu label="#{messages['status']}" onchange="PF('castorsTable').filter()">

      <f:selectItems value="#{transverseManagedBean.allCastorWorkflowStatuses}" var="cws" itemLabel="#{cws.name}" itemValue="#{cws.name}"/>
    </p:selectCheckboxMenu>
  </f:facet>
</p:column>

Notice how the filtering attribute is declared:

filterable="true" filterBy="#{castor.castorWorkflowStatus.name}" filterMatchMode="in"

In other terms, the comparison is forced the rely on equals() of class String, through the calls to getName() and name().

La conference est animee par Andres Almiray de Canoo Fellow, un Java Champion qui nous vient du Mexique. Officiellement, il s’agit de presenter Gradle pour un usage avance ; neanmoins, Andres dissimule a peine son intention de nous faire quitter Maven pour Gradle.

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