001 // Copyright 2005 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. 014 015 package org.apache.tapestry.form.validator; 016 017 import org.apache.tapestry.IMarkupWriter; 018 import org.apache.tapestry.IRequestCycle; 019 import org.apache.tapestry.form.FormComponentContributorContext; 020 import org.apache.tapestry.form.IFormComponent; 021 import org.apache.tapestry.form.ValidationMessages; 022 import org.apache.tapestry.json.JSONLiteral; 023 import org.apache.tapestry.json.JSONObject; 024 import org.apache.tapestry.util.RegexpMatcher; 025 import org.apache.tapestry.valid.ValidationConstants; 026 import org.apache.tapestry.valid.ValidationConstraint; 027 import org.apache.tapestry.valid.ValidationStrings; 028 import org.apache.tapestry.valid.ValidatorException; 029 030 /** 031 * Validates that the user input, a string, is an email address (by checking it against a regular 032 * expression). 033 * 034 * @author Howard Lewis Ship 035 * @since 4.0 036 */ 037 public class Email extends BaseValidator 038 { 039 public static final String PATTERN = "^[A-Za-z0-9]+([-_\\.]*[A-Za-z0-9]+)*@[A-Za-z0-9]+([-_\\.]*[A-Za-z0-9]+)*(\\.[_A-Za-z]{2,6})$"; 040 041 // TODO: Possible thread safety issue if the validator 042 // is shared across threads, because the matcher 043 // will be too. 044 045 private RegexpMatcher _matcher = new RegexpMatcher(); 046 047 public Email() 048 { 049 } 050 051 public Email(String initializer) 052 { 053 super(initializer); 054 } 055 056 public void validate(IFormComponent field, ValidationMessages messages, Object object) 057 throws ValidatorException 058 { 059 String input = (String) object; 060 061 if (!_matcher.matches(PATTERN, input)) 062 throw new ValidatorException(buildMessage(messages, field), 063 ValidationConstraint.EMAIL_FORMAT); 064 } 065 066 private String buildMessage(ValidationMessages messages, IFormComponent field) 067 { 068 return messages.formatValidationMessage( 069 getMessage(), 070 ValidationStrings.INVALID_EMAIL, 071 new Object[] 072 { field.getDisplayName() }); 073 } 074 075 public void renderContribution(IMarkupWriter writer, IRequestCycle cycle, 076 FormComponentContributorContext context, IFormComponent field) 077 { 078 context.addInitializationScript(field, "dojo.require(\"dojo.validate.web\");"); 079 080 JSONObject profile = context.getProfile(); 081 082 if (!profile.has(ValidationConstants.CONSTRAINTS)) { 083 profile.put(ValidationConstants.CONSTRAINTS, new JSONObject()); 084 } 085 JSONObject cons = profile.getJSONObject(ValidationConstants.CONSTRAINTS); 086 087 accumulateProperty(cons, field.getClientId(), 088 new JSONLiteral("[dojo.validate.isEmailAddress,false,true]")); 089 090 accumulateProfileProperty(field, profile, 091 ValidationConstants.CONSTRAINTS, buildMessage(context, field)); 092 } 093 }