/*

 * 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 java.util.*;

import javax.swing.AbstractListModel;

public class MonitorListModel extends AbstractListModel {

    private final List<String> monitors = new ArrayList<String>();

    MonitorListModel(Environment env) {

        // Create listener.

        MonitorListListener listener = new MonitorListListener();

        env.getContextManager().addContextListener(listener);

        //### remove listeners on exit!

    }

    @Override

    public Object getElementAt(int index) {

        return monitors.get(index);

    }

    @Override

    public int getSize() {

        return monitors.size();

    }

    public void add(String expr) {

        monitors.add(expr);

        int newIndex = monitors.size()-1;  // order important

        fireIntervalAdded(this, newIndex, newIndex);

    }

    public void remove(String expr) {

        int index = monitors.indexOf(expr);

        remove(index);

    }

    public void remove(int index) {

        monitors.remove(index);

        fireIntervalRemoved(this, index, index);

    }

    public List<String> monitors() {

        return Collections.unmodifiableList(monitors);

    }

    public Iterator<?> iterator() {

        return monitors().iterator();

    }

    private void invalidate() {

        fireContentsChanged(this, 0, monitors.size()-1);

    }

    private class MonitorListListener implements ContextListener {

        @Override

        public void currentFrameChanged(final CurrentFrameChangedEvent e) {

            invalidate();

        }

    }

}