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Java > Open Source Codes > org > objectweb > jonas > webapp > jonasadmin > SetUpTreeAction


1 /*
2  * $Header: /cvsroot/jonas/jonas/src/org/objectweb/jonas/webapp/jonasadmin/SetUpTreeAction.java,v 1.2 2004/09/15 12:19:50 benoitf Exp $
3  * $Revision: 1.2 $
4  * $Date: 2004/09/15 12:19:50 $
5  *
6  * ====================================================================
7  *
8  * The Apache Software License, Version 1.1
9  *
10  * Copyright (c) 2001 The Apache Software Foundation. All rights
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14  * modification, are permitted provided that the following conditions
15  * are met:
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20  * 2. Redistributions in binary form must reproduce the above copyright
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26  * any, must include the following acknowlegement:
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30  * if and wherever such third-party acknowlegements normally appear.
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61
62 package org.objectweb.jonas.webapp.jonasadmin;
63
64 import java.io.IOException JavaDoc;
65 import java.util.ArrayList JavaDoc;
66 import java.util.StringTokenizer JavaDoc;
67
68 import javax.servlet.ServletException JavaDoc;
69 import javax.servlet.http.HttpServletRequest JavaDoc;
70 import javax.servlet.http.HttpServletResponse JavaDoc;
71 import javax.servlet.http.HttpSession JavaDoc;
72
73 import org.apache.struts.action.Action;
74 import org.apache.struts.action.ActionForm;
75 import org.apache.struts.action.ActionForward;
76 import org.apache.struts.action.ActionMapping;
77 import org.apache.struts.action.ActionServlet;
78 import org.objectweb.jonas.webapp.taglib.TreeBuilder;
79 import org.objectweb.jonas.webapp.taglib.TreeControl;
80 import org.objectweb.jonas.webapp.taglib.TreeControlNode;
81
82 /**
83  * Test <code>Action</code> sets up tree control data structure
84  * for tree widget
85  *
86  * @author Jazmin Jonson
87  * @author Manveen Kaur
88  * @author Florent Benoit (changes for struts 1.2.2)
89  * @version $Revision: 1.2 $ $Date: 2004/09/15 12:19:50 $
90  */
91
92 public class SetUpTreeAction extends Action {
93
94     public static final int INIT_PLUGIN_MAX = 10;
95     public static final String JavaDoc TREEBUILDER_KEY = "treebuilders";
96     public static final String JavaDoc ROOTNODENAME_KEY = "rootnodename";
97
98 // --------------------------------------------------------- Public Methods
99
100     /**
101      * Process the specified HTTP request, and create the corresponding HTTP
102      * response (or forward to another web component that will create it).
103      * Return an <code>ActionForward</code> instance describing where and how
104      * control should be forwarded, or <code>null</code> if the response has
105      * already been completed.
106      *
107      * @param mapping The ActionMapping used to select this instance
108      * @param actionForm The optional ActionForm bean for this request (if any)
109      * @param request The HTTP request we are processing
110      * @param response The HTTP response we are creating
111      *
112      * @exception IOException if an input/output error occurs
113      * @exception ServletException if a servlet exception occurs
114      */
115     public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest JavaDoc request
116         , HttpServletResponse JavaDoc response)
117         throws IOException JavaDoc, ServletException JavaDoc {
118
119         //ApplicationServlet servlet = (ApplicationServlet) getServlet();
120 ActionServlet servlet = (ActionServlet) getServlet();
121
122         // Getting init parms from web.xml
123
124         // Get the string to be displayed as root node while rendering the tree
125 String JavaDoc rootnodeName = (String JavaDoc) servlet.getServletConfig().getInitParameter(ROOTNODENAME_KEY);
126
127         String JavaDoc treeBuildersStr = (String JavaDoc) servlet.getServletConfig().getInitParameter(
128             TREEBUILDER_KEY);
129
130         // Make the root node and tree control
131
132         // The root node gets rendered only if its value
133 // is set as an init-param in web.xml
134
135         TreeControlNode root = new TreeControlNode("ROOT-NODE", null, rootnodeName
136             , "setUpTree.do?select=ROOT-NODE", "content", true);
137
138         TreeControl control = new TreeControl(root);
139
140         if (treeBuildersStr != null) {
141             Class JavaDoc treeBuilderImpl;
142             TreeBuilder treeBuilderBase;
143
144             ArrayList JavaDoc treeBuilders = new ArrayList JavaDoc(INIT_PLUGIN_MAX);
145             int i = 0;
146             StringTokenizer JavaDoc st = new StringTokenizer JavaDoc(treeBuildersStr, ",");
147             while (st.hasMoreTokens()) {
148                 treeBuilders.add(st.nextToken().trim());
149             }
150
151             if (treeBuilders.size() == 0) {
152                 treeBuilders.add(treeBuildersStr.trim());
153             }
154             for (i = 0; i < treeBuilders.size(); i++) {
155                 try {
156                     treeBuilderImpl = Class.forName((String JavaDoc) treeBuilders.get(i));
157                     treeBuilderBase = (TreeBuilder) treeBuilderImpl.newInstance();
158                     treeBuilderBase.buildTree(control, servlet, request);
159                 }
160                 catch (Throwable JavaDoc t) {
161                     t.printStackTrace(System.out);
162                 }
163             }
164         }
165
166         HttpSession JavaDoc session = request.getSession();
167         session.setAttribute("treeControl", control);
168
169         WhereAreYou oWhere = (WhereAreYou) session.getAttribute(WhereAreYou.SESSION_NAME);
170         oWhere.setTreeControl(control);
171
172         String JavaDoc name = request.getParameter("select");
173         if (name != null) {
174             control.selectNode(name);
175             // Forward back to the Blank page
176 return (mapping.findForward("Blank"));
177         }
178
179         return (mapping.findForward("Tree"));
180
181     }
182 }
183
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