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Java > Open Source Codes > org > tigris > scarab > pipeline > DetermineTargetValve


1 package org.tigris.scarab.pipeline;
2
3 /* ================================================================
4  * Copyright (c) 2001 Collab.Net. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are
8  * met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  *
17  * 3. The end-user documentation included with the redistribution, if
18  * any, must include the following acknowlegement: "This product includes
19  * software developed by Collab.Net <http://www.Collab.Net/>."
20  * Alternately, this acknowlegement may appear in the software itself, if
21  * and wherever such third-party acknowlegements normally appear.
22  *
23  * 4. The hosted project names must not be used to endorse or promote
24  * products derived from this software without prior written
25  * permission. For written permission, please contact info@collab.net.
26  *
27  * 5. Products derived from this software may not use the "Tigris" or
28  * "Scarab" names nor may "Tigris" or "Scarab" appear in their names without
29  * prior written permission of Collab.Net.
30  *
31  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
32  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
33  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
34  * IN NO EVENT SHALL COLLAB.NET OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
37  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
38  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
39  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
40  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42  *
43  * ====================================================================
44  *
45  * This software consists of voluntary contributions made by many
46  * individuals on behalf of Collab.Net.
47  */
48
49 import java.io.IOException JavaDoc;
50
51 import org.apache.fulcrum.parser.ParameterParser;
52 import org.apache.turbine.RunData;
53 import org.apache.turbine.Turbine;
54 import org.apache.turbine.TurbineException;
55 import org.apache.turbine.ValveContext;
56 import org.apache.turbine.pipeline.AbstractValve;
57 import org.tigris.scarab.util.Log;
58
59 /**
60  * This valve determines the target template.
61  *
62  * @author <a HREF="mailto:jmcnally@collab.net">John McNally</a>
63  * @version $Id: DetermineTargetValve.java 9255 2004-11-14 21:07:04Z dep4b $
64  */
65 public class DetermineTargetValve
66     extends AbstractValve
67 {
68     /**
69      * @see org.apache.turbine.Valve#invoke(RunData, ValveContext)
70      */
71     public void invoke(RunData data, ValveContext context)
72         throws IOException JavaDoc, TurbineException
73     {
74         ParameterParser parameters = data.getParameters();
75         if (! data.hasTarget())
76         {
77             String JavaDoc target = parameters.getString("template");
78
79             if (target != null)
80             {
81                 data.setTarget(target);
82                 Log.get().debug("Set target from request parameter");
83             }
84             else if (parameters.getString("id") != null)
85             {
86                 data.setTarget("ViewIssue.vm");
87             }
88             else
89             {
90                 data.setTarget(Turbine.getConfiguration().getString(
91                     Turbine.TEMPLATE_HOMEPAGE));
92                 Log.get().debug("Set target using default value");
93             }
94         }
95         
96         if (Log.get().isDebugEnabled())
97         {
98             Log.get().debug("Target is now: " + data.getTarget());
99         }
100
101         // Pass control to the next Valve in the Pipeline
102 context.invokeNext(data);
103     }
104 }
105
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