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1 package org.apache.tapestry.pets.presentation.components;
2
3
4 import org.apache.tapestry.AbstractComponent;
5 import org.apache.tapestry.IActionListener;
6 import org.apache.tapestry.IDirect;
7 import org.apache.tapestry.IMarkupWriter;
8 import org.apache.tapestry.IRequestCycle;
9 import org.apache.tapestry.Tapestry;
10 import org.apache.tapestry.engine.IEngineService;
11 import org.apache.tapestry.engine.ILink;
12 import org.apache.tapestry.link.DirectLink;
13
14 public abstract class DirectArea extends AbstractComponent implements IDirect
15 {
16 public abstract IActionListener getListener();
17 public abstract Object  getParameters();
18
19 protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
20 {
21 if (cycle.isRewinding())
22 return;
23
24 Object [] parameters = DirectLink.constructServiceParameters(getParameters());
25
26 IEngineService service = cycle.getEngine().getService(Tapestry.DIRECT_SERVICE);
27 ILink link = service.getLink(cycle, this, parameters);
28
29 writer.beginEmpty("area");
30 writer.attribute("href", link.getURL());
31
32 renderInformalParameters(writer, cycle);
33 }
34
35 public void trigger(IRequestCycle cycle)
36 {
37 IActionListener listener = getListener();
38
39 if (listener == null)
40 throw Tapestry.createRequiredParameterException(this, "listener");
41
42 listener.actionTriggered(this, cycle);
43 }
44
45 public boolean isStateful()
46 {
47 return false;
48 }
49
50 }
51
52 |
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