Extension of Grails ValidationTagLib

CustomValidationTagLib.groovy

package com.hussain.pf

import groovy.xml.MarkupBuilder

import org.apache.commons.lang.StringEscapeUtils
import org.codehaus.groovy.grails.plugins.web.taglib.ValidationTagLib

class CustomValidationTagLib extends ValidationTagLib {
	
	/**
	* Loops through each error and renders it using one of the supported mechanisms (defaults to "list" if unsupported).
	*
	* @attr bean REQUIRED The bean to check for errors
	* @attr field The field of the bean or model reference to check
	* @attr model The model reference to check for errors
	*/
   def renderErrors = { attrs, body ->
	   def renderAs = attrs.remove('as')
	   if (!renderAs) renderAs = 'list'

	   if (renderAs == 'list') {
		   def codec = attrs.codec ?: 'HTML'
		   if (codec == 'none') codec = ''

		   out << "<ul>"
		   out << eachErrorInternal(attrs, {
			   out << "<li>${message(error:it, encodeAs:codec)}</li>"
		   })
		   out << "</ul>"
	   }
	   else if (renderAs.equalsIgnoreCase("xml")) {
		   def mkp = new MarkupBuilder(out)
		   mkp.errors() {
			   eachErrorInternal(attrs, {
				   error(object: it.objectName,
						 field: it.field,
						 message: message(error:it)?.toString(),
						   'rejected-value': StringEscapeUtils.escapeXml(it.rejectedValue))
			   })
		   }
	   }
	   else if (renderAs) {
		   def codec = attrs.codec ?: 'HTML'
		   if (codec == 'none') codec = ''

		   out << eachErrorInternal(attrs, {
			   out << "<${renderAs}>${message(error:it, encodeAs:codec)}</${renderAs}>"
		   })
	   }
   }

}