01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: */
28:
29: package com.caucho.relaxng;
30:
31: import com.caucho.relaxng.program.Item;
32: import com.caucho.util.L10N;
33:
34: import java.util.ArrayList;
35:
36: /**
37: * Parse state.
38: */
39: public class ParseState {
40: protected static final L10N L = new L10N(ParseState.class);
41:
42: private ArrayList<Item> _stack = new ArrayList<Item>();
43: private ArrayList<int[]> _interleaveStack = new ArrayList<int[]>();
44:
45: public void push(Item next) {
46: _stack.add(next);
47: }
48:
49: public Item pop() {
50: if (_stack.size() == 0)
51: return null;
52: else
53: return _stack.remove(_stack.size() - 1);
54: }
55: }
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