001// Copyright 2007, 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.Matcher; 026import java.util.regex.Pattern; 027 028/** 029 * Enforces that the input matches a provided regular expression. 030 */ 031public class Regexp extends AbstractValidator<Pattern, String> 032{ 033 public Regexp(JavaScriptSupport javaScriptSupport) 034 { 035 super(Pattern.class, String.class, "regexp", javaScriptSupport); 036 } 037 038 private String buildMessage(MessageFormatter formatter, Field field, Pattern constraintValue) 039 { 040 return formatter.format(constraintValue.toString(), field.getLabel()); 041 } 042 043 public void render(Field field, Pattern constraintValue, MessageFormatter formatter, MarkupWriter writer, 044 FormSupport formSupport) 045 { 046 if (formSupport.isClientValidationEnabled()) 047 { 048 javaScriptSupport.require("t5/core/validation"); 049 050 writer.attributes(DataConstants.VALIDATION_ATTRIBUTE, true, 051 "data-validate-regexp", constraintValue.pattern(), 052 "data-regexp-message", buildMessage(formatter, field, constraintValue)); 053 } 054 } 055 056 public void validate(Field field, Pattern constraintValue, MessageFormatter formatter, String value) 057 throws ValidationException 058 { 059 Matcher matcher = constraintValue.matcher(value); 060 061 if (!matcher.matches()) throw new ValidationException(buildMessage(formatter, field, constraintValue)); 062 } 063 064}