EMAIL_LIST stereotype and validation class

Hi Javi
I have used EMAIL_LIST stereotype and validation class in qaManager and want to share same with OpenXava.

Following was done 
1) Added to default-size.xml
<for-stereotype name="EMAIL_LIST" size="200"/>

2) Added to editors.xml
<editor url="textEditor.jsp">
<for-stereotype stereotype="EMAIL_LIST"/>
</editor>

3) Added to Stereotype-type-default.xml
<for stereotype="EMAIL_LIST" type="String"/>

4) Added to messages_en.properties file

email_list_validation_error=Email list should contain valid emails seperated by commas

5) Validation class

package org.openxava.validators;

import org.openxava.validators.IPropertyValidator;
import org.openxava.util.Messages;

import org.apache.commons.validator.GenericValidator;
import java.util.StringTokenizer;

/**
* @author Janesh Kodikara
*/

public class EmailListValidator implements IPropertyValidator {

    public void validate(Messages errors, Object value, String propertyName, String modelName) throws Exception {

        if (value == null || value.toString().length() == 0) return;

        StringTokenizer emailAddresses = new StringTokenizer(value.toString(), ",");
        while(emailAddresses.hasMoreTokens()) {
            if (! GenericValidator.isEmail(emailAddresses.nextToken())) {
                errors.add("email_list_validation_error", propertyName);
            }
        }

    }

}

Your comments to improve this is appreciated.

Thanking you
Janesh