1 /*
2 * Copyright 2004 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package com.nordija.tapestry.bayeux.downloads;
17
18 import org.apache.tapestry.IMarkupWriter;
19 import org.apache.tapestry.IRequestCycle;
20 import org.apache.tapestry.engine.IEngineService;
21 import org.apache.tapestry.engine.ILink;
22 import org.apache.tapestry.link.AbstractLinkComponent;
23
24 /**
25 * Renders a link to the stream service.
26 * <p/>
27 * The link will include an id for the resource to be streamed.
28 *
29 * @author Per Olesen www.nordija.com
30 * @author Jacob von Eyben www.nordija.com
31 * @version $Id: DownloadLink.java 119 2007-06-01 12:46:54Z jeyben $
32 * @see com.nordija.tapestry.bayeux.stream.StreamLink
33 * @see com.nordija.tapestry.bayeux.stream.StreamService
34 * @deprecated Will moste likly be removed in a later release. Use the {@link com.nordija.tapestry.bayeux.stream.StreamLink} instead.
35 */
36 public abstract class DownloadLink extends AbstractLinkComponent {
37
38 public abstract String getDownloadResourceId();
39
40 public abstract String getDownloadResourceSourceExtentionName();
41
42 public abstract boolean isStateful();
43
44 public abstract IEngineService getDownloadService();
45
46 protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) {
47 if (cycle.isRewinding()) {
48 return;
49 }
50
51 ILink link = getDownloadService().getLink(isStateful(), new Object[]{getDownloadResourceId(), getDownloadResourceSourceExtentionName()});
52
53 if (!isDisabled()) {
54 writer.begin("a");
55 writer.attribute("href", link.getURL());
56 renderInformalParameters(writer, cycle);
57 }
58 renderBody(writer, cycle);
59 if (!isDisabled()) {
60 writer.end();
61 }
62 }
63
64 }