Browser


1   /**
2    * Browser.java is a part of the SOFA project.
3    * This file was created by pepan on 14.4.2003.
4    */
5   package SOFA.SOFAnode.InOut.Impl;
6   
7   import SOFA.SOFAnode.TR.ComponentInfo;
8   import SOFA.Util.VMProperties;
9   
10  import javax.swing.*;
11  import javax.swing.tree.*;
12  import java.awt.*;
13  import java.awt.event.ActionEvent;
14  import java.awt.event.ActionListener;
15  import java.io.FileInputStream;
16  import java.io.IOException;
17  import java.util.*;
18  
19  /**
20   * Browses TR and enables installing components from other TRs.
21   * @author  Petr Panuska
22   */
23  public class Browser extends JFrame implements ActionListener {
24  
25    /**
26     * A list of known SOFA nodes.
27     */
28    private Properties TRList;
29  
30    /**
31     * The text appearing in the message area when starting this application.
32     */
33    private String messageText;
34  
35    /**
36     * Used in JTrees.
37     */
38    private DefaultTreeModel model;
39  
40    /**
41     * Used by a user for exploring known SOFA nodes and components stored in there and for
42     * selecting these components before their distribution.
43     */
44    private JTree leftTR, rightTR;
45  
46    /**
47     * Used by a user for pulling selected components to selected SOFA nodes.
48     */
49    private JButton obtainButton;
50  
51    /**
52     * Used by a user for pushing selected components to selected SOFA nodes.
53     */
54    private JButton distributeButton;
55  
56    /**
57     * Used by a user for pulling the description of selected components to selected SOFA nodes.
58     */
59    private JButton obtainOfferButton;
60  
61    /**
62     * Used by a user for pushing the description of selected components to selected SOFA nodes.
63     */
64    private JButton distributeOfferButton;
65  
66    /**
67     * Used by a user to force refreshing the content of JTrees.
68     */
69    private JButton refreshButton;
70  
71    /**
72     * Shows messages (mainly errors) which occured during the running of the browser.
73     */
74    private static JTextArea messages;
75  
76    /**
77     * Creates and initializes the browser.
78     * @param confPath a path to the config file listing all known SOFA nodes.
79     */
80    public Browser (String confPath) {
81      TRList = new Properties();
82      messageText = "";
83      try {
84        TRList.load(new FileInputStream(confPath));
85      } catch (IOException e) {
86        messageText = "Configuration file not found (" + confPath + ")!\n";
87        System.out.print(messageText);
88      }
89  
90      obtainButton = new JButton("<<<");
91      obtainButton.setToolTipText("Obtain selected components");
92      obtainButton.addActionListener(this);
93      distributeButton = new JButton(">>>");
94      distributeButton.setToolTipText("Distribute selected components");
95      distributeButton.addActionListener(this);
96  
97      obtainOfferButton = new JButton("<");
98      obtainOfferButton.setToolTipText("Obtain description of selected components");
99      obtainOfferButton.addActionListener(this);
100     distributeOfferButton = new JButton(">");
101     distributeOfferButton.setToolTipText("Distribute description of selected components");
102     distributeOfferButton.addActionListener(this);
103 
104     refreshButton = new JButton("<>");
105     refreshButton.setToolTipText("Refresh nodes");
106     refreshButton.addActionListener(this);
107 
108     messages = new JTextArea(messageText);
109 
110     model = getTreeStructure(TRList);
111     leftTR = new JTree(model);
112     rightTR = new JTree(model);
113 
114     JSplitPane componentPanel = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, true,
115       new JScrollPane(leftTR), new JScrollPane(rightTR));
116     componentPanel.setResizeWeight(0.5);
117 
118     GridBagLayout gridBag = new GridBagLayout();
119     JPanel panel = new JPanel(gridBag);
120 
121     GridBagConstraints c = new GridBagConstraints();
122 
123     c.fill = GridBagConstraints.BOTH;
124     c.weightx = 1.0;
125     c.weighty = 1.0;
126     c.gridwidth = GridBagConstraints.REMAINDER;
127     gridBag.setConstraints(componentPanel, c);
128     panel.add(componentPanel);
129 
130     c.fill = GridBagConstraints.NONE;
131     c.gridwidth = 1;
132     c.weighty = 0.0;
133     c.anchor = GridBagConstraints.CENTER;
134     gridBag.setConstraints(distributeOfferButton, c);
135     panel.add(distributeOfferButton);
136 
137     gridBag.setConstraints(distributeButton, c);
138     panel.add(distributeButton);
139 
140     gridBag.setConstraints(refreshButton, c);
141     panel.add(refreshButton);
142 
143     gridBag.setConstraints(obtainButton, c);
144     panel.add(obtainButton);
145 
146     c.gridwidth = GridBagConstraints.REMAINDER;
147     gridBag.setConstraints(obtainOfferButton, c);
148     panel.add(obtainOfferButton);
149 
150     JScrollPane messagePanel = new JScrollPane(messages);
151 
152     getContentPane().add(new JSplitPane(JSplitPane.VERTICAL_SPLIT, true, panel, messagePanel));
153     setDefaultCloseOperation(DISPOSE_ON_CLOSE);
154     String sofaNodeName = System.getProperty(VMProperties.NODE_NAME);
155     setTitle("SOFA Net Manager" + ((sofaNodeName == null) ? "" : " on " + sofaNodeName));
156     pack();
157     componentPanel.setDividerLocation(0.5);
158     setVisible(true);
159 
160   }
161 
162   /**
163    * Creates and returns the tree model used in both JTrees.
164    * @param TRList the list of all known SOFA nodes. Each key is a unique name of
165    * the entry; each value is a connector in a string form pointing from the client to
166    * the InOut part of the SOFA node.
167    * @return the tree model for both JTrees (all known SOFA nodes and all components stored
168    * on them).
169    */
170   private DefaultTreeModel getTreeStructure (Properties TRList) {
171     DefaultMutableTreeNode root = new DefaultMutableTreeNode("Known SOFA nodes");
172 
173     Enumeration enum = TRList.keys();
174     while (enum.hasMoreElements()) {   // for all known sofa nodes
175       String name = (String) enum.nextElement();
176       String ref = (String) TRList.get(name);
177       SOFANode node = new SOFANode(name, ref, messages);
178 
179       DefaultMutableTreeNode tNode = node.connect(root);
180       if (node.isConnected())
181         node.list(tNode);
182     }
183 
184     return new DefaultTreeModel(root);
185   }
186 
187   /**
188    * Runs the browser. First it checks whether there is no more than one command
189    * line parameter, otherwise it ends immediately. If no argumet is handed on to
190    * the browser, it tries the default config file first ('tr.cfg' in the working directory).
191    * @param argv one argument which is a path to the config file. If no argument is
192    * used, the default one is tried.
193    */
194   public static void main (String[] argv) {
195     if (argv.length > 1) {
196       System.out.println(
197         "Browser [config file name]\n" +
198         "   - a config file of the name 'tr.cfg' in the working directory is used as default.");
199       System.exit(-1);
200     }
201     String confPath = (argv.length == 0) ? "tr.cfg" : argv[0];
202 
203     new Browser(confPath);
204   }
205 
206   /**
207    * Receives actions performed by buttons.
208    * @param e the emitted event. It also point to the button which has emitted the event.
209    */
210   public void actionPerformed (ActionEvent e) {
211     if (e.getSource() == distributeButton || e.getSource() == obtainButton ||
212       e.getSource() == distributeOfferButton || e.getSource() == obtainOfferButton) {
213       JTree sourceTR, destTR;
214       if (e.getSource() == distributeButton || e.getSource() == distributeOfferButton) {
215         sourceTR = leftTR;
216         destTR = rightTR;
217       } else {
218         sourceTR = rightTR;
219         destTR = leftTR;
220       }
221 
222       HashMap from = new HashMap();
223       TreePath[] selected = sourceTR.getSelectionPaths();
224       if (selected != null) {
225         for (int i = 0; i < selected.length; i++) {
226           TreePath path = selected[i];
227           DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) path.getLastPathComponent();
228           Object o = treeNode.getUserObject();
229           if (o instanceof SOFANode) {
230             SOFANode node = (SOFANode) o;
231             HashSet components = new HashSet();
232             ComponentInfo[] infos = node.getComponents();
233             for (int j = 0; j < infos.length; j++) {
234               ComponentInfo info = infos[j];
235               components.add(info);
236             }
237             from.put(node, components);
238           }
239           if (o instanceof ComponentInfo) {
240             ComponentInfo info = (ComponentInfo) o;
241             DefaultMutableTreeNode treeNode2 = (DefaultMutableTreeNode) path.getParentPath().getLastPathComponent();
242             SOFANode node = (SOFANode) treeNode2.getUserObject();
243             HashSet components = (HashSet) from.get(node);
244             if (components == null) {
245               components = new HashSet();
246               from.put(node, components);
247             }
248             components.add(info); // adds the object only if not already present.
249           }
250         }
251       }
252       HashSet to = new HashSet();
253       selected = destTR.getSelectionPaths();
254       if (selected != null) {
255         for (int i = 0; i < selected.length; i++) {
256           TreePath path = selected[i];
257           DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) path.getLastPathComponent();
258           Object o = treeNode.getUserObject();
259           if (o instanceof SOFANode) {
260             SOFANode node = (SOFANode) o;
261             to.add(node);
262           }
263         }
264       }
265       if (e.getSource() == distributeButton)
266         new DistributeDialog(from, to, true, false);
267       else if (e.getSource() == distributeOfferButton)
268         new DistributeDialog(from, to, true, true);
269       else if (e.getSource() == obtainButton)
270         new DistributeDialog(from, to, false, false);
271       else if (e.getSource() == obtainOfferButton)
272         new DistributeDialog(from, to, false, true);
273       else
274       {
275         assert(true);
276       }
277     }
278     if (e.getSource() == refreshButton) {
279       DefaultMutableTreeNode root = (DefaultMutableTreeNode) model.getRoot();
280       int size = root.getChildCount();
281       for (int i = 0; i < size; i++) {
282         DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) root.getChildAt(i);
283         SOFANode sofaNode = (SOFANode) treeNode.getUserObject();
284         if (!sofaNode.isConnected()) {
285           sofaNode.reconnect(treeNode);
286           model.nodeChanged(treeNode);
287         }
288         if (sofaNode.isConnected()) {
289           sofaNode.list(treeNode);
290           model.nodeStructureChanged(treeNode);
291         }
292       }
293     }
294 
295   }
296 
297 }
298
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