001// Copyright 2007, 2008 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; 022 023import java.util.regex.Matcher; 024import java.util.regex.Pattern; 025 026public class Regexp extends AbstractValidator<Pattern, String> 027{ 028 public Regexp() 029 { 030 super(Pattern.class, String.class, "regexp"); 031 } 032 033 private String buildMessage(MessageFormatter formatter, Field field, Pattern constraintValue) 034 { 035 return formatter.format(constraintValue.toString(), field.getLabel()); 036 } 037 038 public void render(Field field, Pattern constraintValue, MessageFormatter formatter, MarkupWriter writer, 039 FormSupport formSupport) 040 { 041 formSupport.addValidation(field, "regexp", buildMessage(formatter, field, constraintValue), 042 constraintValue.pattern()); 043 } 044 045 public void validate(Field field, Pattern constraintValue, MessageFormatter formatter, String value) 046 throws ValidationException 047 { 048 Matcher matcher = constraintValue.matcher(value); 049 050 if (!matcher.matches()) throw new ValidationException(buildMessage(formatter, field, constraintValue)); 051 } 052 053}