    001// Copyright 2018 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.commons.MessageFormatter;
    020import org.apache.tapestry5.services.FormSupport;
    021import org.apache.tapestry5.services.Html5Support;
    022import org.apache.tapestry5.services.javascript.JavaScriptSupport;
    023
    024/**
    025 * A validator that enforces that the value is true. This validator is not configurable.
    026 *
    027 * @since 5.5.0
    028 */
    029public final class Checked extends CheckboxValidator
    030{
    031    final private Html5Support html5Support;
    032
    033    public Checked(JavaScriptSupport javaScriptSupport, Html5Support html5Support)
    034    {
    035        super(javaScriptSupport, "checked", Boolean.TRUE, "checked");
    036        this.html5Support = html5Support;
    037    }
    038
    039    public void render(Field field, Void constraintValue, MessageFormatter formatter, MarkupWriter writer,
    040                       FormSupport formSupport)
    041    {
    042        super.render(field, constraintValue, formatter, writer, formSupport);
    043
    044        if (html5Support.isHtml5SupportEnabled())
    045        {
    046            writer.attributes("required", "required");
    047        }
    048    }
    049}