01: /**
02: * ASM: a very small and fast Java bytecode manipulation framework
03: * Copyright (c) 2000-2005 INRIA, France Telecom
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions
08: * are met:
09: * 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: */package org.drools.asm.attrs;
30:
31: import java.util.List;
32:
33: import org.drools.asm.Label;
34:
35: /**
36: * Holds the state of the stack and local variables for a single execution
37: * branch.
38: *
39: * <i>Note that Long and Double types are represented by two entries in locals
40: * and stack. Second entry should be always of type Top.</i>
41: *
42: * @see <a href="http://www.jcp.org/en/jsr/detail?id=139">JSR 139 : Connected
43: * Limited Device Configuration 1.1</a>
44: *
45: * @see "ClassFileFormat-Java6.fm Page 138 Friday, April 15, 2005 3:22 PM"
46: *
47: * @author Eugene Kuleshov
48: */
49: public class StackMapFrame {
50:
51: /**
52: * A <code>Label</code> for frame offset within method bytecode.
53: */
54: public Label label;
55:
56: /**
57: * A List of <code>StackMapType</code> instances that represent locals for
58: * this frame.
59: */
60: public List locals;
61:
62: /**
63: * A List of <code>StackMapType</code> instances that represent stack for
64: * this frame.
65: */
66: public List stack;
67:
68: public StackMapFrame(final Label label, final List locals,
69: final List stack) {
70: this .label = label;
71: this .locals = locals;
72: this .stack = stack;
73: }
74:
75: public String toString() {
76: final StringBuffer sb = new StringBuffer("Frame:L");
77: sb.append(System.identityHashCode(this .label));
78: sb.append(" locals").append(this .locals);
79: sb.append(" stack").append(this.stack);
80: return sb.toString();
81: }
82: }
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