01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package EDU.purdue.cs.bloat.tree;
22:
23: /**
24: * MonitorStmt represents the <tt>monitorenter</tt> and <tt>monitorexit</tt>
25: * opcodes, which gain and release ownership of the monitor associated with a
26: * given object.
27: */
28: public class MonitorStmt extends Stmt {
29: public static final int ENTER = 0;
30:
31: public static final int EXIT = 1;
32:
33: int kind;
34:
35: Expr object;
36:
37: /**
38: * Constructor.
39: *
40: * @param kind
41: * The kind of monitor statement: ENTER or EXIT.
42: * @param object
43: * The expression (object) whose monitor is being entered or
44: * exited.
45: */
46: public MonitorStmt(final int kind, final Expr object) {
47: this .kind = kind;
48: this .object = object;
49:
50: object.setParent(this );
51: }
52:
53: public Expr object() {
54: return object;
55: }
56:
57: public int kind() {
58: return kind;
59: }
60:
61: public void visitForceChildren(final TreeVisitor visitor) {
62: object.visit(visitor);
63: }
64:
65: public void visit(final TreeVisitor visitor) {
66: visitor.visitMonitorStmt(this );
67: }
68:
69: public Object clone() {
70: return copyInto(new MonitorStmt(kind, (Expr) object.clone()));
71: }
72: }
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