Primefaces custom validation

<p:outputLabel for="piBirthDay" value="Example label" />
<p:datePicker id="piBirthDay"
  validatorMessage="You are not allowed"
  value="#{data.motorbikePlateRequest.bikeOwner.birthday}"
  showTime="false" required="true">
    <f:validator binding="#{greaterOrEqual18YearOldValidator}" />
</p:datePicker>

=============================

import java.time.LocalDate;
import java.time.ZoneId;
import java.util.Arrays;
import java.util.Date;

import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;

@ManagedBean(name = "greaterOrEqual18YearOldValidator")
public class GreaterOrEqual18YearOldValidator implements Validator {

	@Override
	public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
		if (value == null) {
			return;
		}

		if (!isGreaterOrEqual18YearOld((Date) value)) {
			String message = "You are not allowed to make a request";
			FacesMessage facesMessage = new FacesMessage(FacesMessage.SEVERITY_ERROR, "Validation Error", message);

			throw new ValidatorException(Arrays.asList(facesMessage));
		}
	}

	private boolean isGreaterOrEqual18YearOld(Date value) {
		final int YEAR_OLD = 18;
		LocalDate idealDateTime = this.convertToLocalDateViaInstant(value).plusYears(YEAR_OLD);
		return idealDateTime.compareTo(LocalDate.now()) < 0; // when the ideal date time less than now
	}

	private LocalDate convertToLocalDateViaInstant(Date dateToConvert) {
		return dateToConvert.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
	}
}

Similar codes

4 votes112 views1 answer
Java calculate fps
Java
0 vote115 views1 answer
How to take binary input in java
Java
16 votes121 views2 answers
Log4j
Java
0 vote159 views1 answer
Java eliminate numbers from string
Java
0 vote113 views1 answer
Naming convention for selenium java automation
Java
4 votes134 views1 answer
Type variable java
Java
0 vote114 views1 answer
How to disable special characters on keyboard in android
Java
0 vote129 views1 answer
Jax-RS POST annotation
Java
0 vote138 views3 answers
Android USSD code example
Java
1 vote129 views1 answer
Unicode in java
Java