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 
  26 package build.tools.jdwpgen;
  27 
  28 import java.util.*;
  29 
  30 class 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 }