How to get the dynamic calendar value input - jsf-2

Question

I wanted to write a code to get the input value of prime faces calendar input value.
<div style="padding-left: 300px;">
<p:calendar value="#{calendarBean.fromDate}" id="fromButton" showOn="button" pattern="dd-MMMM-yyyy"
required="true" requiredMessage="Insert From Date!">
</p:calendar>
<p:calendar value="#{calendarBean.toDate}" id="toButton" showOn="button" pattern="dd-MMMM-yyyy"
style="padding-left: 100px;padding-right: 30px" required="true" requiredMessage="Insert To Date!">
</p:calendar>
<p:commandButton actionListener="#{userLeaveBean.addAppliedLeave}" styleClass="apply_button" value="Create Leave">
<f:attribute name="userId" value="#{employee.name}"/>
</p:commandButton>
</div>
I want to pass three parameter values(userId,fromDate,toDate) through the method call
<p:commandButton actionListener="#{userLeaveBean.addAppliedLeave}" styleClass="apply_button" value="Create Leave">
using method addAppliedLeave().
I am able to send the userId using:
<f:attribute name="userId" value="#{employee.name}"/> but how can I pass the values for calender input at run time?
also I am able to get the value of userId in method addAppliedLeave()
public void addAppliedLeave(ActionEvent event){
String userId = (String)event.getComponent().getAttributes().get("userId");
System.out.println(userId);
String fromDate = (String)event.getComponent().getAttributes().get("fromDate");
System.out.println(fromDate);
}
but I am totaly helpless about dynamic input of <p:calendar> value.
Please help.

Answer 1

You can easily get p:calender value at run time using p:ajax as shown here
/* view.xhtml */
<p:calendar value="#{yourBackingBean.user.fromDate}" mode="inline" id="inlineCal">
<p:ajax event="dateSelect" listener="#{yourBackingBean.handleDateSelect}" update="growl" />
</p:calendar>
/* Backing bean */
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
#ManagedBean
#ViewScoped
public class YourBackingBean implements Serializable {
private static final long serialVersionUID = 1L;
private User user;
public void handleDateSelect(DateSelectEvent event) {
System.out.println("dynamic date selected is "+user.getFromDate());
// so here you will get everytime your changed date.
//As this method will get called everytime whenever you will change your date from p:calender component.
}
public User getUser() {
if(user==null){
user=new User();
}
return user;
}
}
/* javaBean */
public class User implements Serializable {
private static final long serialVersionUID = 1L;
private Date fromDate;
private Date toDate;
public Date getFromDate() {
return fromDate;
}
public void setFromDate(Date fromDate) {
this.fromDate = fromDate;
}
public Date getToDate() {
return toDate;
}
public void setToDate(Date toDate) {
this.toDate = toDate;
}
}