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;
24 import java.lang.reflect.*;
27 class TableHandler<C> {
28 protected ConnectionFactory cf;
29 protected boolean haskey;
30 protected String delstmt;
31 protected String insorreplstmt;
32 protected String getstmt;
33 protected String liststmt;
34 protected String initstmt;
35 protected Class<C> cls;
36 protected DBFieldHandler[] fields;
37 private static Map<String, Map<String, DBFieldHandler.SqlOp>> exceptions = new HashMap<String, Map<String, DBFieldHandler.SqlOp>>();
38 public static void setSpecialCase(String dbtabname, String dbfldname, DBFieldHandler.SqlOp handler) {
39 Map<String, DBFieldHandler.SqlOp> m = exceptions.get(dbtabname);
41 m = new HashMap<String, DBFieldHandler.SqlOp>();
42 exceptions.put(dbtabname, m);
44 m.put(dbfldname, handler);
46 public static DBFieldHandler.SqlOp getSpecialCase(String dbtabname, String dbfldname) {
47 Map<String, DBFieldHandler.SqlOp> m = exceptions.get(dbtabname);
49 return(m.get(dbfldname));
53 protected TableHandler(Class<C> cls, String tabname, String keyname) throws Exception {
54 this(ConnectionFactory.getDefaultInstance(), cls, tabname, keyname);
56 protected TableHandler(ConnectionFactory cf, Class<C> cls, String tabname, String keyname) throws Exception {
61 setup(c.getMetaData(), cls, tabname, keyname);
68 private void setup(DatabaseMetaData dmd, Class<C> cls, String tabname, String keyname) throws Exception {
70 Vector<DBFieldHandler> h = new Vector<DBFieldHandler>();
71 String qualifiedTableName = String.format( "%s.%s", cf.getSchema(), tabname );
72 ResultSet rs = dmd.getColumns("", cf.getSchema(), tabname, null);
73 StringBuffer sb1 = new StringBuffer();
74 StringBuffer sb2 = new StringBuffer();
75 StringBuffer sb3 = new StringBuffer();
78 if (!rs.getString(3).equals(tabname)) {
81 String cname = rs.getString(4);
82 if (cname.equals(keyname)) {
86 sb1.append(", ").append(cname);
88 sb3.append(", EXCLUDED.").append(cname);
90 h.add(new DBFieldHandler(cls, cname, count, getSpecialCase(tabname, cname)));
93 throw new SQLException("Table " + tabname + " not found");
95 String clist = sb1.substring(2);
96 String qlist = sb2.substring(2);
97 String elist = sb3.substring(2);
98 if (keyname != null && !haskey) {
99 throw new SQLException("Table " + tabname + " does not have key column " + keyname + " not found");
103 h.add(new DBFieldHandler(cls, keyname, count, getSpecialCase(tabname, keyname)));
104 delstmt = "DELETE FROM " + qualifiedTableName + " WHERE " + keyname + " = ?";
105 insorreplstmt = "INSERT INTO " + qualifiedTableName + " (" + clist + ", " + keyname + ") VALUES (" + qlist + ", ?) ON CONFLICT(" + keyname + ") DO UPDATE SET (" + clist + ") = (" + elist + ")";
106 getstmt = "SELECT " + clist + ", " + keyname + " FROM " + qualifiedTableName + " WHERE " + keyname + " = ?";
107 liststmt = "SELECT " + clist + ", " + keyname + " FROM " + qualifiedTableName;
109 delstmt = "DELETE FROM " + qualifiedTableName;
110 initstmt = "INSERT INTO " + qualifiedTableName + " (" + clist + ") VALUES (" + qlist + ")";
111 insorreplstmt = "UPDATE " + qualifiedTableName + " SET (" + clist + ") = (" + qlist + ")";
112 getstmt = "SELECT " + clist + ", " + keyname + " FROM " + qualifiedTableName;
114 fields = h.toArray(new DBFieldHandler[h.size()]);