1/*
2 * Copyright (c) 1998, 2013, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package build.tools.jdwpgen;
27
28import java.util.*;
29
30class Context {
31
32    static final int outer = 0;
33    static final int readingReply = 1;
34    static final int writingCommand = 2;
35
36    final String whereJava;
37    final String whereC;
38
39    int state = outer;
40    private boolean inEvent = false;
41
42    Context() {
43        whereJava = "";
44        whereC = "";
45    }
46
47    private Context(String whereJava, String whereC) {
48        this.whereJava = whereJava;
49        this.whereC = whereC;
50    }
51
52    Context subcontext(String level) {
53        Context ctx;
54        if (whereC.length() == 0) {
55            ctx = new Context(level, level);
56        } else {
57            ctx = new Context(whereJava + "." + level, whereC + "_" + level);
58        }
59        ctx.state = state;
60        ctx.inEvent = inEvent;
61        return ctx;
62    }
63
64    private Context cloneContext() {
65        Context ctx = new Context(whereJava, whereC);
66        ctx.state = state;
67        ctx.inEvent = inEvent;
68        return ctx;
69    }
70
71    Context replyReadingSubcontext() {
72        Context ctx = cloneContext();
73        ctx.state = readingReply;
74        return ctx;
75    }
76
77    Context commandWritingSubcontext() {
78        Context ctx = cloneContext();
79        ctx.state = writingCommand;
80        return ctx;
81    }
82
83    Context inEventSubcontext() {
84        Context ctx = cloneContext();
85        ctx.inEvent = true;
86        return ctx;
87    }
88
89    boolean inEvent() {
90        return inEvent;
91    }
92
93    boolean isWritingCommand() {
94        return state == writingCommand;
95    }
96
97    boolean isReadingReply() {
98        return state == readingReply;
99    }
100}
101