01 
02 /*
03  *  Descripter 1.0 - Java Script Engines
04  *  Copyright (C) 2010-2015  Jianjun Liu (J.J.Liu)
05  *  
06  *  This program is free software: you can redistribute it and/or modify
07  *  it under the terms of the GNU Affero General Public License as published by
08  *  the Free Software Foundation, either version 3 of the License, or
09  *  (at your option) any later version.
10  *  
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU Affero General Public License for more details.
15  *  
16  *  You should have received a copy of the GNU Affero General Public License
17  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 package org.descripter.js;
21 
22 /**
23  * <p>An abstract base class for interpreting exceptions.</p>
24  *
25  * @see Interpreter
26  * 
27  * @author <a href="mailto:jianjunliu@126.com">J.J.Liu (Jianjun Liu)</a> at <a href="http://www.descripter.org" target="_blank">http://www.descripter.org</a>
28  * @since Descripter 1.0
29  */
30 public abstract class Abrupt extends RuntimeException
31 {
32     private static final long serialVersionUID = -1952897482867528618L;
33 
34     /**
35      * <p>A stored value.</p>
36      * @since Descripter 1.0
37      */
38     public final Object value;
39 
40     /**
41      * <p>Constructs a runtime exception of this type.</p>
42      * @param value A value to store.
43      * @since Descripter 1.0
44      */
45     protected Abrupt(Object value) {
46         this.value = value;
47     }
48 
49     /**
50      * <p>Constructs a runtime exception of this type.</p>
51      * @since Descripter 1.0
52      */
53     protected Abrupt() {
54         this(null);
55     }
56 
57     /**
58      * <p>Tries to throw the runtime exception.</p>
59      * @param label A label value.
60      * @since Descripter 1.0
61      */
62     public final void tryThrow(Object label) {
63         if (value != null && !value.equals(label)) {
64             throw this;
65         }
66     }
67 }