Edge.java revision 674060f01e9090cd21b3c5656cc3204912ad17a6 
1/***
2 * ASM: a very small and fast Java bytecode manipulation framework
3 * Copyright (c) 2000-2007 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 */
30package org.mockito.asm;
31
32/**
33 * An edge in the control flow graph of a method body. See {@link Label Label}.
34 *
35 * @author Eric Bruneton
36 */
37class Edge {
38
39    /**
40     * Denotes a normal control flow graph edge.
41     */
42    static final int NORMAL = 0;
43
44    /**
45     * Denotes a control flow graph edge corresponding to an exception handler.
46     * More precisely any {@link Edge} whose {@link #info} is strictly positive
47     * corresponds to an exception handler. The actual value of {@link #info} is
48     * the index, in the {@link ClassWriter} type table, of the exception that
49     * is catched.
50     */
51    static final int EXCEPTION = 0x7FFFFFFF;
52
53    /**
54     * Information about this control flow graph edge. If
55     * {@link ClassWriter#COMPUTE_MAXS} is used this field is the (relative)
56     * stack size in the basic block from which this edge originates. This size
57     * is equal to the stack size at the "jump" instruction to which this edge
58     * corresponds, relatively to the stack size at the beginning of the
59     * originating basic block. If {@link ClassWriter#COMPUTE_FRAMES} is used,
60     * this field is the kind of this control flow graph edge (i.e. NORMAL or
61     * EXCEPTION).
62     */
63    int info;
64
65    /**
66     * The successor block of the basic block from which this edge originates.
67     */
68    Label successor;
69
70    /**
71     * The next edge in the list of successors of the originating basic block.
72     * See {@link Label#successors successors}.
73     */
74    Edge next;
75}
76