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