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Java > Open Source Codes > oracle > toplink > libraries > asm > Edge


1 /***
2  * ASM: a very small and fast Java bytecode manipulation framework
3  * Copyright (c) 2000,2002,2003 INRIA, France Telecom
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  * notice, this list of conditions and the following disclaimer in the
13  * documentation and/or other materials provided with the distribution.
14  * 3. Neither the name of the copyright holders nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28  * THE POSSIBILITY OF SUCH DAMAGE.
29  */
30
31 package oracle.toplink.libraries.asm;
32
33 /**
34  * An edge in the control flow graph of a method body. See {@link Label Label}.
35  *
36  * @author Eric Bruneton
37  */
38
39 class Edge {
40
41   /**
42    * The (relative) stack size in the basic block from which this edge
43    * originates. This size is equal to the stack size at the "jump" instruction
44    * to which this edge corresponds, relatively to the stack size at the
45    * beginning of the originating basic block.
46    */
47
48   int stackSize;
49
50   /**
51    * The successor block of the basic block from which this edge originates.
52    */
53
54   Label successor;
55
56   /**
57    * The next edge in the list of successors of the originating basic block.
58    * See {@link Label#successors successors}.
59    */
60
61   Edge next;
62
63   /**
64    * The next available edge in the pool. See {@link CodeWriter}.
65    */
66
67   Edge poolNext;
68 }
69
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