    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
    015package org.apache.tapestry5.internal.renderers;
    016
    017import org.apache.tapestry5.MarkupWriter;
    018import org.apache.tapestry5.ioc.annotations.Primary;
    019import org.apache.tapestry5.services.ObjectRenderer;
    020
    021import java.util.List;
    022
    023/**
    024 * Renders a List, but rendering an unordered list.
    025 */
    026public 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}