[ https://hibernate.onjira.com/browse/HV-591?page=com.atlassian.jira.plugin... ] Hardy Ferentschik updated HV-591: --------------------------------- Description: When I attempt to validate the email address below the IDN.toASCII call throws an exception because it's using the entire email address and not just the domain, eg _aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(a)hibernate.org_ In _EmailValidator.java_: {code} public boolean isValid(CharSequence value, ConstraintValidatorContext context) { if ( value == null || value.length() == 0 ) { return true; } String asciiString = IDN.toASCII( value.toString() ); //<- fails here Matcher m = pattern.matcher( asciiString ); return m.matches(); } {code} A test: {code} @Test public void testForLongEmailAddresses(){ final String longEmail = &quot;aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(a)hibernate.org&quot;; IllegalArgumentException e = null; try{ new EmailValidator().isValid(longEmail, null); }catch (IllegalArgumentException f){ e = f; } assertTrue(e == null, "IllegalArgumentException thrown while validating email address"); } {code} was: When I attempt to validate the email address below the IDN.toASCII call throws an exception because it's using the entire email address and not just the domain. aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(a)hibernate.org In EmailValidator.java: public boolean isValid(CharSequence value, ConstraintValidatorContext context) { if ( value == null || value.length() == 0 ) { return true; } String asciiString = IDN.toASCII( value.toString() ); //<- fails here Matcher m = pattern.matcher( asciiString ); return m.matches(); } A test: @Test public void testForLongEmailAddresses(){ final String longEmail = &quot;aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(a)hibernate.org&quot;; IllegalArgumentException e = null; try{ new EmailValidator().isValid(longEmail, null); }catch (IllegalArgumentException f){ e = f; } assertTrue(e == null, "IllegalArgumentException thrown while validating email address"); } -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira