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
025/* A vaidator that enforces that a number is greater than some minimum integer value. */
026public class Min extends AbstractValidator<Long, Number>
027{
028    public Min(JavaScriptSupport javaScriptSupport)
029    {
030        super(Long.class, Number.class, "min-integer", javaScriptSupport);
031    }
032
033    public void validate(Field field, Long constraintValue, MessageFormatter formatter, Number value)
034            throws ValidationException
035    {
036        if (value.longValue() < constraintValue)
037            throw new ValidationException(buildMessage(formatter, field, constraintValue));
038    }
039
040    private String buildMessage(MessageFormatter formatter, Field field, Long constraintValue)
041    {
042        return formatter.format(constraintValue, field.getLabel());
043    }
044
045    public void render(Field field, Long constraintValue, MessageFormatter formatter, MarkupWriter writer,
046                       FormSupport formSupport)
047    {
048        if (formSupport.isClientValidationEnabled())
049        {
050            javaScriptSupport.require("t5/core/validation");
051            writer.attributes(DataConstants.VALIDATION_ATTRIBUTE, true,
052                    "data-validate-min", constraintValue.toString(),
053                    "data-min-message", buildMessage(formatter, field, constraintValue));
054        }
055    }
056}