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Java > Open Source Codes > com > quadcap > sql > types > TypeVarChar


1 package com.quadcap.sql.types;
2
3 /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * 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 JavaDoc;
42 import java.io.IOException JavaDoc;
43 import java.io.ObjectInput JavaDoc;
44 import java.io.ObjectOutput JavaDoc;
45
46 import java.sql.ResultSet JavaDoc;
47 import java.sql.SQLException JavaDoc;
48 import java.sql.Types JavaDoc;
49
50 import com.quadcap.util.Debug;
51
52 /**
53  * The SQL <b>VARCHAR</b> type.
54  *
55  * @author Stan Bailes
56  */

57 public class TypeVarChar implements Type, Externalizable JavaDoc {
58     public static final TypeVarChar typeVarChar = new TypeVarChar();
59
60     int max = -1;
61
62     public TypeVarChar() {}
63     
64     public TypeVarChar(int max) {
65     this.max = max;
66     }
67     
68     public String JavaDoc getTypeName() {
69     return "VARCHAR";
70     }
71
72     public int getMax() { return max; }
73     
74     public int getJDBCType() { return Types.VARCHAR; }
75
76     public String JavaDoc getJDBCClassName() { return "java.lang.Integer"; }
77
78     public int getPrecision() { return -1; }
79
80     public int getScale() { return 0; }
81
82     public int getMaxPrecision() { return -1; }
83
84     public int getMinScale() { return -1; }
85
86     public int getMaxScale() { return -1; }
87
88     public boolean isCharType() { return true; }
89
90     public boolean isCaseSensitive() { return false; }
91
92     public boolean isCurrency() { return false; }
93
94     public boolean isSigned() { return false; }
95                       
96     public int getDisplayWidth() { return max; }
97                       
98     public String JavaDoc toString() {
99     StringBuffer JavaDoc sb = new StringBuffer JavaDoc();
100     sb.append("VARCHAR");
101     if (max > 0) {
102         sb.append('(');
103         sb.append(Integer.toString(max));
104         sb.append(')');
105     }
106     return sb.toString();
107     }
108
109     /**
110      * We don't bother serializing the data, since Java serialization is
111      * only used for the type portion of a table column.
112      */

113     public void readExternal(ObjectInput JavaDoc in) throws IOException JavaDoc {
114     max = in.readInt();
115     }
116     
117     public void writeExternal(ObjectOutput JavaDoc out) throws IOException JavaDoc {
118     out.writeInt(max);
119     }
120
121     public Value convert(Value v) throws ValueException {
122     return v.convert(this);
123     }
124
125     public String JavaDoc getCreateParams() {
126         return "length";
127     }
128 }
129
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