001// Copyright 2007, 2008, 2012, 2014 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.commons.MessageFormatter;
021import org.apache.tapestry5.services.FormSupport;
022import org.apache.tapestry5.services.Html5Support;
023import org.apache.tapestry5.services.javascript.DataConstants;
024import org.apache.tapestry5.services.javascript.JavaScriptSupport;
025
026/* A vaidator that enforces that a number is greater than some minimum integer value. */
027public class Min extends AbstractValidator<Long, Number>
028{
029    final private Html5Support html5Support;
030    
031    public Min(JavaScriptSupport javaScriptSupport, Html5Support html5Support)
032    {
033        super(Long.class, Number.class, "min-integer", javaScriptSupport);
034        this.html5Support = html5Support;
035    }
036
037    public void validate(Field field, Long constraintValue, MessageFormatter formatter, Number value)
038            throws ValidationException
039    {
040        if (value.longValue() < constraintValue)
041            throw new ValidationException(buildMessage(formatter, field, constraintValue));
042    }
043
044    private String buildMessage(MessageFormatter formatter, Field field, Long constraintValue)
045    {
046        return formatter.format(constraintValue, field.getLabel());
047    }
048
049    public void render(Field field, Long constraintValue, MessageFormatter formatter, MarkupWriter writer,
050                       FormSupport formSupport)
051    {
052        if (formSupport.isClientValidationEnabled())
053        {
054            javaScriptSupport.require("t5/core/validation");
055            writer.attributes(DataConstants.VALIDATION_ATTRIBUTE, true,
056                    "data-validate-min", constraintValue.toString(),
057                    "data-min-message", buildMessage(formatter, field, constraintValue));
058        }
059        if (html5Support.isHtml5SupportEnabled())
060        {
061            writer.getElement().forceAttributes("type", "number", "min", String.valueOf(constraintValue));
062        }
063    }
064}