Writing Your Own Rules in Validator Framework
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Create your own valiadtion rules is the powerful features in validator framework.To create your own validator rules and use it in a struts DynamicForm.Your web application may require a specific validation that is not provided by the struts validation framework. The struts validator framework provides a simple interface for creating your own custom validations that can easily be plugged into the validation framework.
You need to perform the following step :-1. Create a java class and a new validation rule method in this class.2. Create an entry in the validation-rules.xml file.3. Applying new validation rule to form bean field inside validation.xml file.4. Add messages to the ApplicationResources.properties file.Add a new <form> tag or modify an existing tag to indicate that this rule is to be applied when the form is validated.
5.Your own validator rules method get passed a bean ,validatorAction , Field .Step 1. Create a java class and a new validation rule method in this class.public class CustomValidatorRulesExample { public static boolean validatePhone(Object bean, ValidatorAction action, Field field, ActionMessages errors, Validator validator, HttpServletRequest request) { ----------- } }
Step 2. Create an entry in the validation-rules.xml file.<validator name="phone" classname="r4r.co.in.CustomValidatorRulesExample" method="validatePhone" methodParams="java.lang.Object,org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field,org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator,javax.servlet.http.HttpServletRequest" depends="" msg="errors.phone"/>
Step 3. Applying new validation rule to form bean field inside validation.xml file.Step 4. Add messages to the ApplicationResources.properties file.<field property="phone" depends="required,phone"> <arg0 key="form.mobile" /> </field>
# Resources for parameter 'r4r.co.in.ApplicationResources' # Project OwnValidatorRulesExample # -- standard errors --errors.header=<UL> errors.prefix=<LI> errors.suffix=</LI>errors.footer=</UL> # -- validator -- errors.invalid={0} is invalid. errors.maxlength={0} can not be greater than {1} characters. errors.minlength={0} can not be less than {1} characters. errors.range={0} is not in the range {1} through {2}. errors.required={0} is required. errors.byte={0} must be an byte. errors.date={0} is not a date. errors.double={0} must be an double. errors.float={0} must be an float. errors.integer={0} must be an integer. errors.long={0} must be an long. errors.short={0} must be an short. errors.creditcard={0} is not a valid credit card number. errors.email={0} is an invalid e-mail address. # -- other -- errors.cancel=Operation cancelled. errors.detail={0}errors.general=The process did not complete. Details should follow. errors.token=Request could not be completed. Operation is not in sequence. form.phone=Telephone no errors.phone='{0}' field is not a valid Phone no. error.phoneNumber.required =Phone number is required.Step 5.Add a new <form> tag or modify an existing tag to indicate that this rule is to be applied when the form is validated.
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