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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 | * Copyright 2001-2005 The Apache Software Foundation. |
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5 | * |
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6 | * Licensed under the Apache License, Version 2.0 (the "License") |
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7 | * you may not use this file except in compliance with the License. |
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8 | * You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | ||
19 | import java.sql.Connection; |
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20 | import java.sql.SQLException; |
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21 | import java.sql.Statement; |
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22 | ||
23 | /** |
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24 | * This code should be used for an Informix database pool. |
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25 | * |
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26 | * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a> |
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27 | * @author <a href="mailto:bpm@ec-group.com">Brian P Millett</a> |
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28 | * @version $Id: DBInformix.java 239630 2005-08-24 12:25:32Z henning $ |
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29 | */ |
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30 | public class DBInformix extends DB |
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31 | { |
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32 | /** |
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33 | * Empty constructor. |
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34 | */ |
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35 | protected DBInformix() |
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36 | 0 | { |
37 | 0 | } |
38 | ||
39 | /** |
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40 | * This method is used to ignore case. Problem is that Informix |
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41 | * does not have an UPPER function. So the best would be to do |
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42 | * nothing. |
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43 | * |
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44 | * @param in The string to transform to upper case. |
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45 | * @return The upper case string. |
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46 | */ |
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47 | public String toUpperCase(String in) |
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48 | { |
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49 | 0 | return in; |
50 | } |
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51 | ||
52 | /** |
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53 | * This method is used to ignore case. Problem is that Informix |
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54 | * does not have an UPPER function. So the best would be to do |
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55 | * nothing. |
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56 | * |
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57 | * @param in The string whose case to ignore. |
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58 | * @return The string in a case that can be ignored. |
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59 | */ |
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60 | public String ignoreCase(String in) |
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61 | { |
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62 | 0 | return in; |
63 | } |
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64 | ||
65 | /** |
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66 | * @see org.apache.torque.adapter.DB#getIDMethodType() |
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67 | */ |
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68 | public String getIDMethodType() |
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69 | { |
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70 | 0 | return NO_ID_METHOD; |
71 | } |
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72 | ||
73 | /** |
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74 | * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object obj) |
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75 | */ |
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76 | public String getIDMethodSQL(Object obj) |
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77 | { |
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78 | 0 | return null; |
79 | } |
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80 | ||
81 | /** |
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82 | * The method is used to lock a table. |
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83 | * |
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84 | * @param con The JDBC connection to use. |
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85 | * @param table The name of the table to lock. |
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86 | * @exception SQLException No Statement could be created or executed. |
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87 | */ |
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88 | public void lockTable(Connection con, String table) throws SQLException |
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89 | { |
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90 | 0 | Statement statement = con.createStatement(); |
91 | ||
92 | 0 | StringBuffer stmt = new StringBuffer(); |
93 | 0 | stmt.append("LOCK TABLE ") |
94 | .append(table) |
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95 | .append(" IN EXCLUSIVE MODE"); |
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96 | ||
97 | 0 | statement.executeQuery(stmt.toString()); |
98 | 0 | } |
99 | ||
100 | /** |
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101 | * The method is used to unlock a table. |
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102 | * |
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103 | * @param con The JDBC connection to use. |
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104 | * @param table The name of the table to unlock. |
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105 | * @exception SQLException No Statement could be created or executed. |
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106 | */ |
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107 | public void unlockTable(Connection con, String table) throws SQLException |
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108 | { |
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109 | // Tables in Informix are unlocked when a commit is issued. |
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110 | // The user may have issued a commit but do it here to be |
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111 | // sure. |
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112 | 0 | con.commit(); |
113 | 0 | } |
114 | } |
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