Primefaces datatable date range filter with filterFunction

classcastexception, datatable, jsf-2, primefaces

Solution

Advanced solution:

JSF:

<p:column headerText="#{msg.date}" sortBy="#{bean.date}" filterBy="#{bean.date}" filterFunction="#{dateRangeFilter.filterByDate}">
  <f:facet name="filter">
    <h:inputHidden id="filter" />
  </f:facet>
  <f:facet name="header">
    <h:outputText value="#{msg.date}" />
    <br />
    <p:calendar id="from" pattern="dd.MM.yyyy">
      <p:ajax event="dateSelect" onstart="$(PrimeFaces.escapeClientId('#{p:component('filter')}'))[0].value = $(PrimeFaces.escapeClientId('#{p:component('from')}_input'))[0].value + '-' + $(PrimeFaces.escapeClientId('#{p:component('to')}_input'))[0].value" oncomplete="PF('dataTable').filter()" />
    </p:calendar>
    <p:calendar id="to" pattern="dd.MM.yyyy">
      <p:ajax event="dateSelect" onstart="$(PrimeFaces.escapeClientId('#{p:component('filter')}'))[0].value = $(PrimeFaces.escapeClientId('#{p:component('from')}_input'))[0].value + '-' + $(PrimeFaces.escapeClientId('#{p:component('to')}_input'))[0].value" oncomplete="PF('dataTable').filter()" />
    </p:calendar>
  </f:facet>
  <h:outputText value="#{bean.date}">
    <f:convertDateTime type="date" dateStyle="medium" />
  </h:outputText>
</p:column>

Filter Bean:

@Named
@ApplicationScoped
public class DateRangeFilter implements Serializable {

    private static final Logger LOG = Logger.getLogger(DateRangeFilter.class.getName());

    public boolean filterByDate(Object value, Object filter, Locale locale) {

        String filterText = (filter == null) ? null : filter.toString().trim();
        if (filterText == null || filterText.isEmpty()) {
            return true;
        }
        if (value == null) {
            return false;
        }

        DateFormat df = SimpleDateFormat.getDateInstance(SimpleDateFormat.MEDIUM);

        Date filterDate = (Date) value;
        Date dateFrom;
        Date dateTo;
        try {
            String fromPart = filterText.substring(0, filterText.indexOf("-"));
            String toPart = filterText.substring(filterText.indexOf("-") + 1);
            dateFrom = fromPart.isEmpty() ? null : df.parse(fromPart);
            dateTo = toPart.isEmpty() ? null : df.parse(toPart);
        } catch (ParseException pe) {
            LOG.log(Level.SEVERE, "unable to parse date: " + filterText, pe);
            return false;
        }

        return (dateFrom == null || filterDate.after(dateFrom)) && (dateTo == null || filterDate.before(dateTo));
    }
}

Problem

I use filterFunction method of datatable on primefaces 5.0. I want to filter birthday by date range on column header. On browser console I receive this error: ``` <?xml version="1.0" encoding="utf-8"?><partial-response><error><error-name>java.lang.ClassCastException</error-name><error-message><![CDATA[javax.faces.component.UIPanel cannot be cast to javax.faces.component.ValueHolder]]></error-message></error></partial-response> ``` Datatable : ``` <p:dataTable var="person" value="#{testDateRange.persons}" id="personTable" paginator="true" styleClass="customTableStyle" editable="true" rows="10" resizableColumns="true" emptyMessage="No persons" filteredValue="#{testDateRange.filteredPersons}" widgetVar="dateRangeWidget" > <p:column id="nameId" filterBy="name" sortBy="name" filterMatchMode="contains" headerText="Name"> <h:outputText value="#{person.name}" /> </p:column> <p:column id="birthdayId" headerText="birthday" filterBy="birthday" filterFunction="#{testDateRange.filterByDate}"> <f:facet name="filter"> <p:calendar id="from" value="#{testDateRange.dateFrom}" styleClass="customCalendar" pattern="dd/MM/yyyy"> <p:ajax event="dateSelect" oncomplete="PF('dateRangeWidget').filter()" update="personTable"/> </p:calendar> <p:calendar id="to" value="#{testDateRange.dateTo}" styleClass="customCalendar" pattern="dd/MM/yyyy"> <p:ajax event="dateSelect" oncomplete="PF('dateRangeWidget').filter()" update="personTable"/> </p:calendar> </f:facet> <h:outputText value="#{person.birthday}" > <f:convertDateTime pattern="dd/MM/yyyy"/> </h:outputText> </p:column> </p:dataTable> ``` Bean: ``` @Component("testDateRange") @Scope("session") public class TestDateRangeBean { private List<Person> persons; List<Person> filteredPersons; private Date dateFrom; private Date dateTo; public TestDateRangeBean() { persons = new ArrayList<>(Arrays.asList( new Person("John", new Date(1357016400000L)), new Person("Will",new Date(1357102800000L)), new Person("Peter",new Date(1414900800000L)), new Person("Cris", new Date(1438747200000L)), new Person("Cemil", new Date(1436068800000L)) )); } public boolean filterByDate(Object value, Object filter, Locale locale) { // it fails before calling this method String filterText = (filter == null) ? null : filter.toString().trim(); if(StringUtils.isEmpty(filterText)) { return true; } if(value == null) { return false; } DateFormat df = new SimpleDateFormat("dd/MM/yyyy"); Date filterDate; try { filterDate = df.parse(filterText); } catch (ParseException e) { return false; } return filterDate.after(dateFrom) && filterDate.before(dateTo); } //all the getters and setters ``` And I have a simple POJO Person class that contains only 'name' and 'birthday'. How can I filter birthday by the dates I enter on column header. I see that it gets the UIPanel component instead of dates values. (I assume it expects one component with a value, and when it finds two components, it returns the container component itself, am I right?) Thanks

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