InternalDebugControl.java revision 3062:15bdc18525ff 
1/*
2 * Copyright (c) 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
24package jdk.internal.jshell.debug;
25
26import java.util.HashMap;
27import java.util.Map;
28import jdk.jshell.JShell;
29
30/**
31 * Used to externally control output messages for debugging the implementation
32 * of the JShell API.  This is NOT a supported interface,
33 * @author Robert Field
34 */
35public class InternalDebugControl {
36    public static final int DBG_GEN   = 0b0000001;
37    public static final int DBG_FMGR  = 0b0000010;
38    public static final int DBG_COMPA = 0b0000100;
39    public static final int DBG_DEP   = 0b0001000;
40    public static final int DBG_EVNT  = 0b0010000;
41
42    private static Map<JShell, Integer> debugMap = null;
43
44    public static void setDebugFlags(JShell state, int flags) {
45        if (debugMap == null) {
46            debugMap = new HashMap<>();
47        }
48        debugMap.put(state, flags);
49    }
50
51    public static boolean debugEnabled(JShell state, int flag) {
52        if (debugMap == null) {
53            return false;
54        }
55        Integer flags = debugMap.get(state);
56        if (flags == null) {
57            return false;
58        }
59        return (flags & flag) != 0;
60    }
61}
62