/*

 * Copyright (c) 1999, 2011, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

/*

 * This source code is provided to illustrate the usage of a given feature

 * or technique and has been deliberately simplified. Additional steps

 * required for a production-quality application, such as security checks,

 * input validation and proper error handling, might not be present in

 * this sample code.

 */

package com.sun.tools.example.debug.gui;

import javax.swing.*;

import javax.swing.event.*;

import java.awt.*;

import com.sun.jdi.*;

import com.sun.tools.example.debug.bdi.*;

import com.sun.tools.example.debug.expr.ExpressionParser;

import com.sun.tools.example.debug.expr.ParseException;

public class MonitorTool extends JPanel {

    private static final long serialVersionUID = -645235951031726647L;

    private ExecutionManager runtime;

    private ContextManager context;

    private JList list;

    public MonitorTool(Environment env) {

        super(new BorderLayout());

        this.runtime = env.getExecutionManager();

        this.context = env.getContextManager();

        list = new JList(env.getMonitorListModel());

        list.setCellRenderer(new MonitorRenderer());

        JScrollPane listView = new JScrollPane(list);

        add(listView);

        // Create listener.

        MonitorToolListener listener = new MonitorToolListener();

        list.addListSelectionListener(listener);

        //### remove listeners on exit!

    }

    private class MonitorToolListener implements ListSelectionListener {

        @Override

        public void valueChanged(ListSelectionEvent e) {

            int index = list.getSelectedIndex();

            if (index != -1) {

            }

        }

    }

    private Value evaluate(String expr) throws ParseException,

                                            InvocationException,

                                            InvalidTypeException,

                                            ClassNotLoadedException,

                                            IncompatibleThreadStateException {

        ExpressionParser.GetFrame frameGetter =

            new ExpressionParser.GetFrame() {

                @Override

                public StackFrame get()

                    throws IncompatibleThreadStateException

                {

                    try {

                        return context.getCurrentFrame();

                    } catch (VMNotInterruptedException exc) {

                        throw new IncompatibleThreadStateException();

                    }

                }

            };

        return ExpressionParser.evaluate(expr, runtime.vm(), frameGetter);

    }

    private class MonitorRenderer extends DefaultListCellRenderer {

        @Override

        public Component getListCellRendererComponent(JList list,

                                                      Object value,

                                                      int index,

                                                      boolean isSelected,

                                                      boolean cellHasFocus) {

            //### We should indicate the current thread independently of the

            //### selection, e.g., with an icon, because the user may change

            //### the selection graphically without affecting the current

            //### thread.

            super.getListCellRendererComponent(list, value, index,

                                               isSelected, cellHasFocus);

            if (value == null) {

                this.setText("<unavailable>");

            } else {

                String expr = (String)value;

                try {

                    Value result = evaluate(expr);

                    this.setText(expr + " = " + result);

                } catch (ParseException exc) {

                    this.setText(expr + " ? " + exc.getMessage());

                } catch (IncompatibleThreadStateException exc) {

                    this.setText(expr + " ...");

                } catch (Exception exc) {

                    this.setText(expr + " ? " + exc);

                }

            }

            return this;

        }

    }

}