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.pattern;
30:
31: import com.caucho.relaxng.RelaxException;
32: import com.caucho.relaxng.program.DataItem;
33: import com.caucho.relaxng.program.Item;
34:
35: /**
36: * Relax empty pattern
37: */
38: public class DataPattern extends Pattern {
39: String _type;
40:
41: /**
42: * Creates a new empty pattern.
43: */
44: public DataPattern(String type) {
45: _type = type;
46: }
47:
48: /**
49: * Creates the program (somewhat bogus)
50: */
51: public Item createItem(GrammarPattern grammar)
52: throws RelaxException {
53: return new DataItem(_type);
54: }
55:
56: /**
57: * Returns a string for the production.
58: */
59: public String toProduction() {
60: return "data";
61: }
62:
63: /**
64: * Returns true if it contains a data element.
65: */
66: public boolean hasData() {
67: return true;
68: }
69:
70: public boolean equals(Object o) {
71: if (this == o)
72: return true;
73:
74: if (!(o instanceof DataPattern))
75: return false;
76:
77: DataPattern pattern = (DataPattern) o;
78:
79: return _type.equals(pattern._type);
80: }
81:
82: /**
83: * Debugging.
84: */
85: public String toString() {
86: return "DataPattern[" + _type + "]";
87: }
88: }
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