问题
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
回答1:
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));
}
}
回答2:
If you do not want the trickery with the hidden input field plus the benefit of reusing such a filter consider writing a composite component whose component type extends javax.faces.component.UIInput. Primefaces expects the filter to be a subtype of javax.faces.component.ValueHolder.
This is how the composite component might look like.
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:p="http://primefaces.org/ui"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:cc="http://java.sun.com/jsf/composite"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html">
<!-- INTERFACE -->
<cc:interface componentType="dateRange">
<cc:attribute name="fromLabel"/>
<cc:attribute name="toLabel"/>
<cc:attribute name="value" type="so.example.DateRange"/>
<cc:attribute name="onvaluechanged"/>
</cc:interface>
<!-- IMPLEMENTATION -->
<cc:implementation>
<table>
<tr>
<td style="width: 15%; border: none;">
<h:outputText value="#{cc.attrs.fromLabel}"/>
</td>
<td style="width: 35%; border: none;">
<p:calendar id="startDateCalendar" value="#{cc.attrs.value.from}" maxdate="#{cc.attrs.value.to}">
<p:ajax event="dateSelect" update="endDateCalendar" oncomplete="#{cc.attrs.onvaluechanged}"/>
</p:calendar>
</td>
<td style="width: 15%; border: none;">
<h:outputText value="#{cc.attrs.toLabel}"/>
</td>
<td style="width: 35%; border: none;">
<p:calendar id="endDateCalendar" value="#{cc.attrs.value.to}" mindate="#{cc.attrs.value.from}" maxdate="#{cc.attrs.value.now}">
<p:ajax event="dateSelect" update="startDateCalendar" oncomplete="#{cc.attrs.onvaluechanged}"/>
</p:calendar>
</td>
</tr>
</table>
</cc:implementation>
Notice componentType="dateRange" in the cc:interface tag. This references the root component class of this composite component. Which is as simple as.
@FacesComponent("dateRange")
public class DateRangeComponent extends UIInput implements NamingContainer {
@Override
public String getFamily() {
return UINamingContainer.COMPONENT_FAMILY;
}
}
The value that the composite component takes is a simple POJO.
public class DateRange implements Serializable {
private Date from;
private Date to;
private boolean ignoreTime = true;
public Date getFrom() {
return from;
}
public void setFrom(Date from) {
if (this.isIgnoreTime()) {
Calendar now = Calendar.getInstance();
now.setTime(from);
now.set(Calendar.HOUR_OF_DAY, 0);
now.set(Calendar.MINUTE, 0);
now.set(Calendar.SECOND, 0);
this.from = now.getTime();
} else {
this.from = from;
}
}
public Date getTo() {
return to;
}
public void setTo(Date to) {
if (this.isIgnoreTime()) {
Calendar now = Calendar.getInstance();
now.setTime(to);
now.set(Calendar.HOUR_OF_DAY, 23);
now.set(Calendar.MINUTE, 59);
now.set(Calendar.SECOND, 59);
this.to = now.getTime();
} else {
this.to = to;
}
}
public Date getNow() {
return new Date();
}
public boolean isIgnoreTime() {
return ignoreTime;
}
public void setIgnoreTime(boolean ignoreTime) {
this.ignoreTime = ignoreTime;
}
}
After all that the usage is very simple.
<p:column headerText="#{labels.date}"
sortBy="#{logIn.loginDate}"
filterBy="#{logIn.loginDate}"
filterFunction="#{logInTableBean.filterByDate}"
styleClass="datetime-column">
<f:facet name="filter">
<clx:dateRange fromLabel="#{labels.from}"
toLabel="#{labels.to}"
onvaluechanged="PF('logInTable').filter();"
value="#{logInTableBean.range}"/>
</f:facet>
<h:outputText value="#{logIn.loginDate}">
<f:convertDateTime type="both" dateStyle="long"/>
</h:outputText>
</p:column>
Also notice the custom filter function. Whis is as simple as
public boolean filterByDate(Object value, Object filter, Locale locale) {
Date colDate = (Date) value;
return this.range.getFrom().before(colDate) && this.range.getTo().after(colDate);
}
The whole thing will look like this.
回答3:
Encountered same problem but in my case it was button in filter facet to show overlay panel with range slider inside.
To solve it use header facet instead:
<f:facet name="filter">
<!-- to hide default filter input -->
<h:inputHidden />
</f:facet>
<f:facet name="header">
<p:outputLabel value="birthday" /><br />
<p:calendar id="from" value="#{testDateRange.dateFrom}" styleClass="customCalendar" pattern="dd/MM/yyyy">
<p:ajax event="dateSelect" oncomplete="PF('dateRangeWidget').filter()" />
</p:calendar>
<p:calendar id="to" value="#{testDateRange.dateTo}" styleClass="customCalendar" pattern="dd/MM/yyyy">
<p:ajax event="dateSelect" oncomplete="PF('dateRangeWidget').filter()" />
</p:calendar>
</f:facet>
Also there is no need in update attribute in p:ajax components.
回答4:
This is just Java 8 implementation of @Stephan's answer, using java.time class instead of Date.
The JSF section is almost identical except the date pattern.
<p:column headerText="Date" filterBy="#{passbook.createdAt}" filterFunction="#{applicationController.filterByDate}">
<f:facet name="filter">
<h:inputHidden id="filter" />
</f:facet>
<f:facet name="header">
<h:outputText value="Date" />
<br />
<p:calendar id="from" pattern="dd-MMM-yyyy" size="12">
<p:ajax event="dateSelect" onstart="$(PrimeFaces.escapeClientId('#{p:component('filter')}'))[0].value = $(PrimeFaces.escapeClientId('#{p:component('from')}_input'))[0].value + '>' + $(PrimeFaces.escapeClientId('#{p:component('to')}_input'))[0].value" oncomplete="PF('passbookTable').filter()" />
</p:calendar>
<h:outputText class="fa fa-arrows-h fa-2x" style="vertical-align: top;"/>
<p:calendar id="to" pattern="dd-MMM-yyyy" size="12">
<p:ajax event="dateSelect" onstart="$(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('passbookTable').filter()" />
</p:calendar>
</f:facet>
<h:outputText value="#{passbook.createdAt}">
<f:convertDateTime type="date" dateStyle="medium" pattern="dd-MMM-yyyy"/>
</h:outputText>
Bean:
@Named
@ApplicationScoped
public class ApplicationController implements Serializable {
private static final Logger logger = LogManager.getLogger(ApplicationController.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;
}
DateTimeFormatter sdf = DateTimeFormatter.ofPattern("dd-MMM-yyyy");
Instant instant = ((Date) value).toInstant(); //Zone : UTC+0
LocalDate dateValue = instant.atZone(ZoneId.of("Asia/Kolkata")).toLocalDate();
LocalDate dateFrom;
LocalDate dateTo;
try {
String fromPart = filterText.substring(0, filterText.indexOf(">"));
String toPart = filterText.substring(filterText.indexOf(">") + 1);
dateFrom = fromPart.isEmpty() ? null : LocalDate.parse(fromPart, sdf);
dateTo = toPart.isEmpty() ? null : LocalDate.parse(toPart, sdf);
} catch (Exception e) {
logger.error("unable to parse date: " + filterText, e);
return false;
}
return (dateFrom == null || dateValue.isAfter(dateFrom) || dateValue.isEqual(dateFrom))
&& (dateTo == null || dateValue.isBefore(dateTo) || dateValue.isEqual(dateTo));
}
来源：https://stackoverflow.com/questions/23791039/primefaces-datatable-date-range-filter-with-filterfunction