01: package com.quadcap.sql;
02:
03: /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
04: *
05: * This software is distributed under the Quadcap Free Software License.
06: * This software may be used or modified for any purpose, personal or
07: * commercial. Open Source redistributions are permitted. Commercial
08: * redistribution of larger works derived from, or works which bundle
09: * this software requires a "Commercial Redistribution License"; see
10: * http://www.quadcap.com/purchase.
11: *
12: * Redistributions qualify as "Open Source" under one of the following terms:
13: *
14: * Redistributions are made at no charge beyond the reasonable cost of
15: * materials and delivery.
16: *
17: * Redistributions are accompanied by a copy of the Source Code or by an
18: * irrevocable offer to provide a copy of the Source Code for up to three
19: * years at the cost of materials and delivery. Such redistributions
20: * must allow further use, modification, and redistribution of the Source
21: * Code under substantially the same terms as this license.
22: *
23: * Redistributions of source code must retain the copyright notices as they
24: * appear in each source code file, these license terms, and the
25: * disclaimer/limitation of liability set forth as paragraph 6 below.
26: *
27: * Redistributions in binary form must reproduce this Copyright Notice,
28: * these license terms, and the disclaimer/limitation of liability set
29: * forth as paragraph 6 below, in the documentation and/or other materials
30: * provided with the distribution.
31: *
32: * The Software is provided on an "AS IS" basis. No warranty is
33: * provided that the Software is free of defects, or fit for a
34: * particular purpose.
35: *
36: * Limitation of Liability. Quadcap Software shall not be liable
37: * for any damages suffered by the Licensee or any third party resulting
38: * from use of the Software.
39: */
40:
41: import com.quadcap.sql.types.Value;
42: import com.quadcap.sql.types.Type;
43: import com.quadcap.sql.types.TypeAny;
44:
45: import com.quadcap.util.Debug;
46:
47: /**
48: * Expression implementing JDBC run-time parameters (e.g., "?")
49: *
50: * @author Stan Bailes
51: */
52: public class ParameterExpression extends Expression {
53: Value value;
54:
55: public ParameterExpression() {
56: }
57:
58: public int rank() {
59: return 0;
60: }
61:
62: public Value getValue(Session session, Cursor cursor) {
63: return value;
64: }
65:
66: public Type getType(Session session, Cursor cursor) {
67: return TypeAny.any;
68: }
69:
70: public void setValue(Value value) {
71: this .value = value;
72: }
73:
74: public void invert() {
75: throw new RuntimeException(
76: "invert not implemented for ParameterExpression");
77: }
78:
79: public void visitSubExpressions(ExpressionVisitor ev) {
80: }
81:
82: public String toString() {
83: return "?";
84: }
85: }
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