FormValidator.java

package demo.input.form_sample;

import java.util.Map;

import org.zkoss.bind.Property;
import org.zkoss.bind.ValidationContext;
import org.zkoss.bind.validator.AbstractValidator;

public class FormValidator extends AbstractValidator {
	
	public void validate(ValidationContext ctx) {
		//all the bean properties
		Map<String,Property> beanProps = ctx.getProperties(ctx.getProperty().getBase());
		
		//first let's check the passwords match
		validatePasswords(ctx, (String)beanProps.get("password").getValue(), (String)ctx.getValidatorArg("retypedPassword"));
		validateAge(ctx, (Integer)beanProps.get("age").getValue());
		validateWeight(ctx, (Double)beanProps.get("weight").getValue());
		validateEmail(ctx, (String)beanProps.get("email").getValue());
		validateCaptcha(ctx, (String)ctx.getValidatorArg("captcha"), (String)ctx.getValidatorArg("captchaInput"));
	}
	
	private void validatePasswords(ValidationContext ctx, String password, String retype) {	
		if(password == null || retype == null || (!password.equals(retype))) {
			this.addInvalidMessage(ctx, "password", "Your passwords do not match!");
		}
	}
	
	private void validateAge(ValidationContext ctx, int age) {
		if(age <= 0) {
			this.addInvalidMessage(ctx, "age", "Your age should be > 0!");
		}
	}
	
	private void validateWeight(ValidationContext ctx, double weight) {
		if(weight <= 0) {
			this.addInvalidMessage(ctx, "weight", "Your weight should be > 0!");
		}
	}	
	
	private void validateEmail(ValidationContext ctx, String email) {
		if(email == null || !email.matches(".+@.+\\.[a-z]+")) {
			this.addInvalidMessage(ctx, "email", "Please enter a valid email!");			
		}
	}
	
	private void validateCaptcha(ValidationContext ctx, String captcha, String captchaInput) {
		if(captchaInput == null || !captcha.equals(captchaInput)) {
			this.addInvalidMessage(ctx, "captcha", "The captcha doesn't match!");
		}
	}
	
}