1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*-
* ============LICENSE_START=======================================================
* org.onap.dmaap
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.dmaap.dbcapi.database;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import java.util.Vector;
import org.onap.dmaap.dbcapi.logging.BaseLoggingClass;
class TableHandler<C> extends BaseLoggingClass {
protected ConnectionFactory cf;
protected boolean haskey;
protected String delstmt;
protected String insorreplstmt;
protected String getstmt;
protected String liststmt;
protected String initstmt;
protected Class<C> cls;
protected DBFieldHandler[] fields;
private static Map<String, Map<String, DBFieldHandler.SqlOp>> exceptions = new HashMap<>();
private String select = "SELECT ";
private String from = " FROM ";
protected TableHandler(Class<C> cls, String tabname, String keyname) throws Exception {
this(ConnectionFactory.getDefaultInstance(), cls, tabname, keyname);
}
protected TableHandler(ConnectionFactory cf, Class<C> cls, String tabname, String keyname) throws Exception {
this.cf = cf;
Connection c = null;
try {
c = cf.get(false);
setup(c.getMetaData(), cls, tabname, keyname);
} finally {
if (c != null) {
cf.release(c);
}
}
}
public static void setSpecialCase(String dbtabname, String dbfldname, DBFieldHandler.SqlOp handler) {
Map<String, DBFieldHandler.SqlOp> m = exceptions.get(dbtabname);
if (m == null) {
m = new HashMap<>();
exceptions.put(dbtabname, m);
}
m.put(dbfldname, handler);
}
public static DBFieldHandler.SqlOp getSpecialCase(String dbtabname, String dbfldname) {
Map<String, DBFieldHandler.SqlOp> m = exceptions.get(dbtabname);
if (m != null) {
return(m.get(dbfldname));
}
return(null);
}
private void setup(DatabaseMetaData dmd, Class<C> cls, String tabname, String keyname) throws Exception {
this.cls = cls;
Vector<DBFieldHandler> h = new Vector<>();
String qualifiedTableName = String.format( "%s.%s", cf.getSchema(), tabname );
ResultSet rs = dmd.getColumns("", cf.getSchema(), tabname, null);
StringBuilder sb1 = new StringBuilder();
StringBuilder sb2 = new StringBuilder();
StringBuilder sb3 = new StringBuilder();
int count = 0;
while (rs.next()) {
if (!rs.getString(3).equals(tabname)) {
continue;
}
String cname = rs.getString(4);
if (cname.equals(keyname)) {
haskey = true;
continue;
}
sb1.append(", ").append(cname);
sb2.append(", ?");
sb3.append(", EXCLUDED.").append(cname);
count++;
h.add(new DBFieldHandler(cls, cname, count, getSpecialCase(tabname, cname)));
}
if (count == 0) {
throw new SQLException("Table " + tabname + " not found");
}
String clist = sb1.substring(2);
String qlist = sb2.substring(2);
String elist = sb3.substring(2);
if (keyname != null && !haskey) {
throw new SQLException("Table " + tabname + " does not have key column " + keyname + " not found");
}
if (haskey) {
count++;
h.add(new DBFieldHandler(cls, keyname, count, getSpecialCase(tabname, keyname)));
delstmt = "DELETE FROM " + qualifiedTableName + " WHERE " + keyname + " = ?";
insorreplstmt = "INSERT INTO " + qualifiedTableName + " (" + clist + ", " + keyname + ") VALUES (" + qlist + ", ?) ON CONFLICT(" + keyname + ") DO UPDATE SET (" + clist + ") = (" + elist + ")";
getstmt = select + clist + ", " + keyname + from + qualifiedTableName + " WHERE " + keyname + " = ?";
liststmt = select + clist + ", " + keyname + from + qualifiedTableName;
} else {
delstmt = "DELETE FROM " + qualifiedTableName;
initstmt = "INSERT INTO " + qualifiedTableName + " (" + clist + ") VALUES (" + qlist + ")";
insorreplstmt = "UPDATE " + qualifiedTableName + " SET (" + clist + ") = (" + qlist + ")";
getstmt = select + clist + ", " + keyname + from + qualifiedTableName;
}
fields = h.toArray(new DBFieldHandler[h.size()]);
}
}
|