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org.apache.torque.adapter.DBInformix |
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1 | package org.apache.torque.adapter; |
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2 | ||
3 | /* |
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4 | * Licensed to the Apache Software Foundation (ASF) under one |
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5 | * or more contributor license agreements. See the NOTICE file |
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6 | * distributed with this work for additional information |
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7 | * regarding copyright ownership. The ASF licenses this file |
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8 | * to you under the Apache License, Version 2.0 (the |
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9 | * "License"); you may not use this file except in compliance |
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10 | * with the License. You may obtain a copy of the License at |
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11 | * |
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12 | * http://www.apache.org/licenses/LICENSE-2.0 |
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13 | * |
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14 | * Unless required by applicable law or agreed to in writing, |
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15 | * software distributed under the License is distributed on an |
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16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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17 | * KIND, either express or implied. See the License for the |
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18 | * specific language governing permissions and limitations |
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19 | * under the License. |
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20 | */ |
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21 | ||
22 | import java.sql.Connection; |
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23 | import java.sql.SQLException; |
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24 | import java.sql.Statement; |
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25 | ||
26 | /** |
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27 | * This code should be used for an Informix database pool. |
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28 | * |
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29 | * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a> |
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30 | * @author <a href="mailto:bpm@ec-group.com">Brian P Millett</a> |
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31 | * @version $Id: DBInformix.java 473821 2006-11-11 22:37:25Z tv $ |
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32 | */ |
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33 | public class DBInformix extends AbstractDBAdapter |
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34 | { |
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35 | /** |
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36 | * Serial version |
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37 | */ |
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38 | private static final long serialVersionUID = 2599963509284952957L; |
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39 | ||
40 | /** |
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41 | * Empty constructor. |
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42 | */ |
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43 | protected DBInformix() |
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44 | 0 | { |
45 | 0 | } |
46 | ||
47 | /** |
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48 | * This method is used to ignore case. Problem is that Informix |
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49 | * does not have an UPPER function. So the best would be to do |
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50 | * nothing. |
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51 | * |
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52 | * @param in The string to transform to upper case. |
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53 | * @return The upper case string. |
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54 | */ |
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55 | public String toUpperCase(String in) |
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56 | { |
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57 | 0 | return in; |
58 | } |
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59 | ||
60 | /** |
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61 | * This method is used to ignore case. Problem is that Informix |
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62 | * does not have an UPPER function. So the best would be to do |
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63 | * nothing. |
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64 | * |
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65 | * @param in The string whose case to ignore. |
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66 | * @return The string in a case that can be ignored. |
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67 | */ |
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68 | public String ignoreCase(String in) |
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69 | { |
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70 | 0 | return in; |
71 | } |
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72 | ||
73 | /** |
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74 | * @see org.apache.torque.adapter.DB#getIDMethodType() |
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75 | */ |
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76 | public String getIDMethodType() |
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77 | { |
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78 | 0 | return NO_ID_METHOD; |
79 | } |
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80 | ||
81 | /** |
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82 | * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object obj) |
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83 | */ |
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84 | public String getIDMethodSQL(Object obj) |
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85 | { |
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86 | 0 | return null; |
87 | } |
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88 | ||
89 | /** |
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90 | * The method is used to lock a table. |
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91 | * |
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92 | * @param con The JDBC connection to use. |
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93 | * @param table The name of the table to lock. |
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94 | * @exception SQLException No Statement could be created or executed. |
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95 | */ |
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96 | public void lockTable(Connection con, String table) throws SQLException |
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97 | { |
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98 | 0 | Statement statement = con.createStatement(); |
99 | ||
100 | 0 | StringBuffer stmt = new StringBuffer(); |
101 | 0 | stmt.append("LOCK TABLE ") |
102 | .append(table) |
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103 | .append(" IN EXCLUSIVE MODE"); |
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104 | ||
105 | 0 | statement.executeQuery(stmt.toString()); |
106 | 0 | } |
107 | ||
108 | /** |
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109 | * The method is used to unlock a table. |
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110 | * |
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111 | * @param con The JDBC connection to use. |
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112 | * @param table The name of the table to unlock. |
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113 | * @exception SQLException No Statement could be created or executed. |
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114 | */ |
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115 | public void unlockTable(Connection con, String table) throws SQLException |
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116 | { |
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117 | // Tables in Informix are unlocked when a commit is issued. |
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118 | // The user may have issued a commit but do it here to be |
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119 | // sure. |
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120 | 0 | con.commit(); |
121 | 0 | } |
122 | } |
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