1/*
2 * Copyright (c) 2008, 2015, 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 com.sun.hotspot.igv.data;
26
27/**
28 *
29 * @author Thomas Wuerthinger
30 */
31public abstract class ControllableChangedListener<T> implements ChangedListener<T>{
32
33    private boolean enabled;
34
35
36    public ControllableChangedListener() {
37        enabled = true;
38    }
39
40    public boolean isEnabled() {
41        return enabled;
42    }
43
44    public void setEnabled(boolean b) {
45        enabled = b;
46    }
47
48    @Override
49    public void changed(T source) {
50        if(enabled) {
51            filteredChanged(source);
52        }
53    }
54
55    public abstract void filteredChanged(T source);
56}
57