    001    // Copyright 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
    015    package org.apache.tapestry5.internal.renderers;
    016
    017    import org.apache.tapestry5.MarkupWriter;
    018    import org.apache.tapestry5.ioc.annotations.Primary;
    019    import org.apache.tapestry5.services.ObjectRenderer;
    020
    021    import java.util.List;
    022
    023    /**
    024     * Renders a List, but rendering an unordered list.
    025     */
    026    public class ListRenderer implements ObjectRenderer<List>
    027    {
    028        private final ObjectRenderer masterRenderer;
    029
    030        public ListRenderer(@Primary ObjectRenderer masterRenderer)
    031        {
    032            this.masterRenderer = masterRenderer;
    033        }
    034
    035        public void render(List list, MarkupWriter writer)
    036        {
    037            if (list.isEmpty())
    038            {
    039                writer.element("em");
    040                writer.write("empty list");
    041                writer.end();
    042                return;
    043            }
    044
    045            writer.element("ul", "class", "t-data-list");
    046
    047            for (Object element : list)
    048            {
    049                writer.element("li");
    050
    051                masterRenderer.render(element, writer);
    052
    053                writer.end();
    054            }
    055
    056            writer.end();
    057        }
    058    }