001// Copyright 2008, 2012 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry5.validator; 016 017import org.apache.tapestry5.Field; 018import org.apache.tapestry5.MarkupWriter; 019import org.apache.tapestry5.ValidationException; 020import org.apache.tapestry5.ioc.MessageFormatter; 021import org.apache.tapestry5.services.FormSupport; 022import org.apache.tapestry5.services.javascript.DataConstants; 023import org.apache.tapestry5.services.javascript.JavaScriptSupport; 024 025import java.util.regex.Pattern; 026 027/** 028 * A validator that checks if a given string is well-formed email address. This validator is not configurable. 029 * <p/> 030 * Starting with release 5.4, this validator also performs client-side validation. 031 */ 032public class Email extends AbstractValidator<Void, String> 033{ 034 private static final Pattern PATTERN = Pattern 035 .compile("[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?", Pattern.CASE_INSENSITIVE); 036 037 public Email(JavaScriptSupport javaScriptSupport) 038 { 039 super(null, String.class, "invalid-email", javaScriptSupport); 040 } 041 042 public void render(Field field, Void constraintValue, MessageFormatter formatter, MarkupWriter writer, 043 FormSupport formSupport) 044 { 045 if (formSupport.isClientValidationEnabled()) 046 { 047 javaScriptSupport.require("t5/core/validation"); 048 049 writer.attributes( 050 DataConstants.VALIDATION_ATTRIBUTE, true, 051 "data-validate-regexp", PATTERN.pattern(), 052 "data-regexp-message", formatter.toString()); 053 } 054 } 055 056 public void validate(Field field, Void constraintValue, MessageFormatter formatter, String value) 057 throws ValidationException 058 { 059 if (!PATTERN.matcher(value).matches()) throw new ValidationException(formatter.toString()); 060 } 061}