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


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>CLOB</b> type.
54  *
55  * @author Stan Bailes
56  */
57 public class TypeClob implements Type, Externalizable JavaDoc {
58     public static final TypeClob typeClob = new TypeClob();
59     int max = -1;
60
61     public TypeClob() {}
62     
63     public TypeClob(int max) {
64     this.max = max;
65     }
66     
67     public String JavaDoc getTypeName() {
68     return "CLOB";
69     }
70
71     public int getMax() { return max; }
72     
73     public int getJDBCType() {
74 //- //#ifdef JDK11
75 //- return Type.CLOB;
76 //#else
77 return Types.CLOB;
78     //#endif
79 }
80
81     public String JavaDoc getJDBCClassName() { return "java.sql.Clob"; }
82
83     public int getPrecision() { return max; }
84
85     public int getScale() { return 0; }
86
87     public int getMaxPrecision() { return -1; }
88
89     public int getMinScale() { return -1; }
90
91     public int getMaxScale() { return -1; }
92
93     public boolean isCharType() { return false; }
94
95     public boolean isCaseSensitive() { return false; }
96
97     public boolean isCurrency() { return false; }
98
99     public boolean isSigned() { return false; }
100
101     public int getDisplayWidth() { return (max + 3) / 4; }
102     
103     public String JavaDoc toString() {
104     StringBuffer JavaDoc sb = new StringBuffer JavaDoc();
105     sb.append("CLOB");
106     if (max > 0) {
107         sb.append('(');
108         sb.append(Integer.toString(max));
109         sb.append(')');
110     }
111     return sb.toString();
112     }
113
114     /**
115      * We don't bother serializing the data, since Java serialization is
116      * only used for the type portion of a table column.
117      */
118     public void readExternal(ObjectInput JavaDoc in) throws IOException JavaDoc {
119     max = in.readInt();
120     }
121     
122     public void writeExternal(ObjectOutput JavaDoc out) throws IOException JavaDoc {
123     out.writeInt(max);
124     }
125
126     public Value convert(Value v) throws ValueException {
127     return v.convert(this);
128     }
129
130     public String JavaDoc getCreateParams() {
131         return "length";
132     }
133 }
134
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