01: /***
02: * Retrotranslator: a Java bytecode transformer that translates Java classes
03: * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
04: *
05: * Copyright (c) 2005 - 2008 Taras Puchko
06: * All rights reserved.
07: *
08: * Redistribution and use in source and binary forms, with or without
09: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the copyright holders nor the names of its
17: * contributors may be used to endorse or promote products derived from
18: * this software without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30: * THE POSSIBILITY OF SUCH DAMAGE.
31: */package net.sf.retrotranslator.transformer;
32:
33: import java.util.LinkedList;
34:
35: /**
36: * @author Taras Puchko
37: */
38: class InstantiationFrame {
39:
40: private boolean initialized;
41: private LinkedList<InstantiationPoint> stack;
42:
43: public InstantiationFrame(boolean initialized) {
44: this .initialized = initialized;
45: }
46:
47: public InstantiationFrame(InstantiationFrame frame) {
48: this .initialized = frame.initialized;
49: if (frame.stack != null && !frame.stack.isEmpty()) {
50: this .stack = new LinkedList<InstantiationPoint>(frame.stack);
51: }
52: }
53:
54: public boolean isInitialized() {
55: return initialized;
56: }
57:
58: public void setInitialized(boolean initialized) {
59: this .initialized = initialized;
60: }
61:
62: public void addLast(InstantiationPoint point) {
63: if (stack == null) {
64: stack = new LinkedList<InstantiationPoint>();
65: }
66: stack.addLast(point);
67: }
68:
69: public InstantiationPoint pollLast() {
70: return stack == null || stack.isEmpty() ? null : stack
71: .removeLast();
72: }
73:
74: }
|