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 015package org.apache.tapestry.form.validator; 016 017import java.util.Date; 018 019import org.apache.tapestry.form.IFormComponent; 020import org.apache.tapestry.form.ValidationMessages; 021import org.apache.tapestry.valid.ValidationConstraint; 022import org.apache.tapestry.valid.ValidationStrings; 023import org.apache.tapestry.valid.ValidatorException; 024 025/** 026 * Expects the value to be a {@link Date}, and constrains the date to follow a particular date. 027 * 028 * @author Howard M. Lewis Ship 029 * @since 4.0 030 */ 031 032public class MinDate extends BaseValidator 033{ 034 private Date _minDate; 035 036 public MinDate() 037 { 038 } 039 040 public MinDate(String initializer) 041 { 042 super(initializer); 043 } 044 045 public void setMinDate(Date minDate) 046 { 047 _minDate = minDate; 048 } 049 050 public void validate(IFormComponent field, ValidationMessages messages, Object object) 051 throws ValidatorException 052 { 053 Date date = (Date) object; 054 055 if (date.before(_minDate)) 056 throw new ValidatorException(buildMessage(messages, field), 057 ValidationConstraint.TOO_SMALL); 058 } 059 060 private String buildMessage(ValidationMessages messages, IFormComponent field) 061 { 062 return messages.formatValidationMessage( 063 getMessage(), 064 ValidationStrings.DATE_TOO_EARLY, 065 new Object[] 066 { field.getDisplayName(), _minDate }); 067 } 068 069}