FindPanel.java revision 9883:903a2e023ffb 
1/*
2 * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25package sun.jvm.hotspot.ui;
26
27import java.io.*;
28import java.awt.*;
29import java.awt.event.*;
30import javax.swing.*;
31import javax.swing.text.*;
32
33import sun.jvm.hotspot.debugger.*;
34import sun.jvm.hotspot.runtime.*;
35import sun.jvm.hotspot.utilities.*;
36
37/** Uses {@link sun.jvm.hotspot.utilities.PointerFinder} to provide a
38    graphical user interface to the VM's debugging utility "find". */
39
40public class FindPanel extends JPanel {
41  // UI widgets we need permanent handles to
42  private JTextField addressField;
43  private JTextArea  textArea;
44  private JLabel statusLabel;
45
46  public FindPanel() {
47    super();
48
49    setLayout(new BorderLayout());
50    Box hbox = Box.createHorizontalBox();
51    hbox.add(new JLabel("Address: "));
52    addressField = new JTextField(20);
53    hbox.add(addressField);
54    statusLabel = new JLabel();
55    hbox.add(statusLabel);
56    add(hbox, BorderLayout.NORTH);
57
58    JScrollPane scroller = new JScrollPane();
59    textArea = new JTextArea();
60    textArea.setEditable(false);
61    textArea.setLineWrap(true);
62    textArea.setWrapStyleWord(true);
63    scroller.getViewport().add(textArea);
64    add(scroller, BorderLayout.CENTER);
65
66    addressField.addActionListener(new ActionListener() {
67        public void actionPerformed(ActionEvent e) {
68          try {
69            Address a = VM.getVM().getDebugger().parseAddress(addressField.getText());
70            PointerLocation loc = PointerFinder.find(a);
71            ByteArrayOutputStream bos = new ByteArrayOutputStream();
72            loc.printOn(new PrintStream(bos));
73            clear();
74            textArea.append(bos.toString());
75            statusLabel.setText("");
76          }
77          catch (NumberFormatException ex) {
78            statusLabel.setText("<parse error>");
79          }
80          catch (AddressException ex) {
81            statusLabel.setText("<bad address>");
82          }
83          catch (Exception ex) {
84            ex.printStackTrace();
85            statusLabel.setText("<error during find>");
86          }
87        }
88      });
89  }
90
91  private void clear() {
92    Document doc = textArea.getDocument();
93    if (doc.getLength() > 0) {
94      try {
95        doc.remove(0, doc.getLength());
96      }
97      catch (BadLocationException e) {
98      }
99    }
100  }
101}
102