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; 022 023/* A vaidator that enforces that a number is greater than some minimum integer value. */ 024public class Min extends AbstractValidator<Long, Number> 025{ 026 public Min() 027 { 028 super(Long.class, Number.class, "min-integer"); 029 } 030 031 public void validate(Field field, Long constraintValue, MessageFormatter formatter, Number value) 032 throws ValidationException 033 { 034 if (value.longValue() < constraintValue) 035 throw new ValidationException(buildMessage(formatter, field, constraintValue)); 036 } 037 038 private String buildMessage(MessageFormatter formatter, Field field, Long constraintValue) 039 { 040 return formatter.format(constraintValue, field.getLabel()); 041 } 042 043 public void render(Field field, Long constraintValue, MessageFormatter formatter, MarkupWriter writer, 044 FormSupport formSupport) 045 { 046 formSupport.addValidation(field, "min", buildMessage(formatter, field, constraintValue), constraintValue); 047 } 048}