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 java.io.Externalizable;
42: import java.io.IOException;
43: import java.io.ObjectInput;
44: import java.io.ObjectOutput;
45:
46: /**
47: * An item in a <b>SELECT</b> clause.
48: *
49: * @author Stan Bailes
50: */
51: public class SelectItem implements Externalizable {
52: Expression e;
53: public String asName = null;
54:
55: public SelectItem() {
56: }
57:
58: public SelectItem(Expression e) {
59: this .e = e;
60: }
61:
62: public void setAs(String asName) {
63: this .asName = asName;
64: }
65:
66: public Expression getExpression() {
67: return e;
68: }
69:
70: public String getAsName() {
71: return asName;
72: }
73:
74: public void readExternal(ObjectInput in) throws IOException,
75: ClassNotFoundException {
76: e = (Expression) in.readObject();
77: asName = (String) in.readObject();
78: }
79:
80: public void writeExternal(ObjectOutput out) throws IOException {
81: out.writeObject(e);
82: out.writeObject(asName);
83: }
84:
85: public String toString() {
86: StringBuffer sb = new StringBuffer(e.toString());
87: if (asName != null) {
88: sb.append(" AS ");
89: sb.append(asName);
90: }
91: return sb.toString();
92: }
93: }
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