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}