How to Add A Twofields Validator

In The Struts

Validator Guide, there is a section on how to create a pluggable validator that matches two fields. I've been using this server-side validator (as shown in the example) to do password / confirm password validation. This has worked great for me , But I've Always Wanded-Side Javascript Method for It Too. I Wrote My OWN That Just Compared The Two Fields, But It's NOT The Same As Having One Rendered for you (from from

Validator-rules.xml). So Yesterday, I Did Some Tinkering and first how to add the javascript method

Validator-rules.xml. So Here's How To Configure The Whole Thing (Most of this Is Contained in The Validator Guide, Save the JavaScript).

How to Add A Twofields Validator

Step 1: CREATE A Class with a

Validatetwofields Method. in My Code, My Class IS

ValidationUtil and Has The Following Method:

Public Static Boolean ValidateTwofields (Object Bean, ValidatorAction VA,

Field Field, Actionerrors Errors,

HttpservletRequest request) {

String value =

ValidatorUtil.getValueAsstring (bean, field.getproperty ());

String Sproperty2 = Field.getvarvalue ("SECONDPROPERTY");

String value2 = validatorutil.getValueAsstring (bean, sproperty2);

IF (! genericvalidator.isblankornull (value) {

Try {

IF (! value.equals (value2)) {

Errors.Add (Field.getKey (),

Resources.getActionError (Request, Va, Field);

Return False;

}

} catch (exception e) {

Errors.Add (Field.getKey (),

Resources.getActionError (Request, Va, Field);

Return False;

}

}

Return True;

}

Step 2: Edit Validator-Rules.xml to Contain The "Twofields" Rule.

ClassName = "Org.Appfuse.Webapp.util.validationUtil" Method = "ValidateTwofields" MethodParams = "java.lang.object,

Org.apache.commons.valiDator.validatorAction,

Org.apache.commons.validator.field,

Org.apache.struts.Action.Actionerro,

Javax.Servlet.http.httpservletRequest "

Depends = "Required" msg = "errors.twofields">

Function ValidateTwofield (Form) {

Var bvalid = true;

Var Focusfield = NULL;

VAR i = 0;

Var fields = new arrival ();

OTWOFIELDS = New Twofields ();

For (x in otwofields) {

Var Field = form [otwofields [x] [0]];

VAR SecondField = form [otwofields [x] [2] ("SECONDPROPERTY")];

IF (Field.Type == 'Text' ||

Field.Type == 'Textarea' ||

Field.Type == 'Select-one' ||

Field.Type == 'Radio' ||

Field.Type == 'password') {

VAR value;

VAR SecondValue;

// Get Field's Value

IF (Field.Type == "Select-One") {

Var si = field.selectedIndIndex;

Value = Field.Options [Si] .value;

Secondfield.Options [Si] .value;

} else {

Value = Field.Value;

Secondfield.Value;

}

IF (value! = secondValue) {

IF (i == 0) {

Focusfield = field;

}

Fields [i ] = OTWOFIELDS [X] [1];

BVALID = false;

}

}

}

IF (Fields.Length> 0) {

Focusfield.focus ();

Alert (Fields.Join ('/ n'));

}

Return BVALID;

}]>

Step 3: Configure Validation for your form in value.xml:

Depends = "Required, Twofields">

name = "Required" key = "errors.required" />

Name = "twofields"

Key = "errors.twofields" />

Key = "Userform.confirmpassword"

/>

SecondProperty

confirmpassword

Where errors.twofields = The '{0}' field has to have the same value as the '{1}' field. An alternative to Step 3 is to use XDoclet to generate your validation.xml. This requires (1) configuring XDoclet (of course) and (2) adding some @struts tags to your form on the setpassword method.

/ **

* Returns the password.

* @Return String

*

* @ Struts.validator type = "required" msgkey = "errors.required"

* @ Struts.validator type = "twofields" msgkey = "errors.twofields"

* @ Struts.validator-args arg1resource = "userform.password"

* @ Struts.validator-args arg1resource = "userform.confirmpassword"

* @ Struts.validator-var name = "secondproperty" value = "confirmpassword"

* /

Public string setpassword () {

Return Password;

}

I've sent this as a proposal to the struts-dev mailing list yesterday, but have not heard anything yet Enjoy Update:.! You'll need to update ValidationUtil.java and validator-rules-custom.xml for Struts 1.2. Full Files: ValidationUtil.java and validation-rules-custom.xml. February 26, 2003 12:29 PM MST Permalink

10 Comments