hotspot/ui/FindPanel.java

/*
 * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

package sun.jvm.hotspot.ui;

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;

import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.utilities.*;

/** Uses {@link sun.jvm.hotspot.utilities.PointerFinder} to provide a
    graphical user interface to the VM's debugging utility "find". */

public class FindPanel extends JPanel {
  // UI widgets we need permanent handles to
  private JTextField addressField;
  private JTextArea  textArea;
  private JLabel statusLabel;

  public FindPanel() {
    super();

    setLayout(new BorderLayout());
    Box hbox = Box.createHorizontalBox();
    hbox.add(new JLabel("Address: "));
    addressField = new JTextField(20);
    hbox.add(addressField);
    statusLabel = new JLabel();
    hbox.add(statusLabel);
    add(hbox, BorderLayout.NORTH);

    JScrollPane scroller = new JScrollPane();
    textArea = new JTextArea();
    textArea.setEditable(false);
    textArea.setLineWrap(true);
    textArea.setWrapStyleWord(true);
    scroller.getViewport().add(textArea);
    add(scroller, BorderLayout.CENTER);

    addressField.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          try {
            Address a = VM.getVM().getDebugger().parseAddress(addressField.getText());
            PointerLocation loc = PointerFinder.find(a);
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            loc.printOn(new PrintStream(bos));
            clear();
            textArea.append(bos.toString());
            statusLabel.setText("");
          }
          catch (NumberFormatException ex) {
            statusLabel.setText("<parse error>");
          }
          catch (AddressException ex) {
            statusLabel.setText("<bad address>");
          }
          catch (Exception ex) {
            ex.printStackTrace();
            statusLabel.setText("<error during find>");
          }
        }
      });
  }

  private void clear() {
    Document doc = textArea.getDocument();
    if (doc.getLength() > 0) {
      try {
        doc.remove(0, doc.getLength());
      }
      catch (BadLocationException e) {
      }
    }
  }
}