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org.apache.torque.adapter.DBSybase |
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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 | import java.util.Date; |
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23 | import java.text.SimpleDateFormat; |
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24 | ||
25 | /** |
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26 | * This is used to connect to a Sybase database using Sybase's |
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27 | * JConnect JDBC driver. |
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28 | * |
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29 | * <B>NOTE:</B><I>Currently JConnect does not implement the required |
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30 | * methods for ResultSetMetaData, and therefore the village API's may |
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31 | * not function. For connection pooling, everything works.</I> |
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32 | * |
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33 | * @author <a href="mailto:ekkerbj@netscape.net">Jeff Brekke</a> |
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34 | * @version $Id: DBSybase.java 239630 2005-08-24 12:25:32Z henning $ |
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35 | */ |
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36 | public class DBSybase extends DB |
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37 | { |
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38 | /** date format */ |
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39 | private static final String DATE_FORMAT = "yyyyMMdd HH:mm:ss"; |
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40 | ||
41 | /** |
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42 | * Empty constructor. |
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43 | */ |
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44 | protected DBSybase() |
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45 | 0 | { |
46 | 0 | } |
47 | ||
48 | /** |
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49 | * This method is used to ignore case. |
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50 | * |
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51 | * @param in The string to transform to upper case. |
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52 | * @return The upper case string. |
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53 | */ |
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54 | public String toUpperCase(String in) |
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55 | { |
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56 | 0 | return new StringBuffer("UPPER(").append(in).append(")").toString(); |
57 | } |
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58 | ||
59 | /** |
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60 | * This method is used to ignore case. |
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61 | * |
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62 | * @param in The string whose case to ignore. |
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63 | * @return The string in a case that can be ignored. |
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64 | */ |
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65 | public String ignoreCase(String in) |
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66 | { |
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67 | 0 | return new StringBuffer("UPPER(").append(in).append(")").toString(); |
68 | } |
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69 | ||
70 | /** |
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71 | * @see org.apache.torque.adapter.DB#getIDMethodType() |
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72 | */ |
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73 | public String getIDMethodType() |
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74 | { |
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75 | 0 | return AUTO_INCREMENT; |
76 | } |
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77 | ||
78 | /** |
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79 | * Returns the last value from an identity column (available on a |
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80 | * per-session basis from the global variable |
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81 | * <code>@@identity</code>). |
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82 | * |
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83 | * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object obj) |
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84 | */ |
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85 | public String getIDMethodSQL(Object unused) |
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86 | { |
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87 | 0 | return "select @@identity"; |
88 | } |
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89 | ||
90 | /** |
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91 | * Locks the specified table. |
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92 | * |
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93 | * @param con The JDBC connection to use. |
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94 | * @param table The name of the table to lock. |
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95 | * @throws SQLException No Statement could be created or executed. |
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96 | */ |
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97 | public void lockTable(Connection con, String table) throws SQLException |
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98 | { |
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99 | 0 | Statement statement = con.createStatement(); |
100 | ||
101 | 0 | StringBuffer stmt = new StringBuffer(); |
102 | 0 | stmt.append("SELECT next_id FROM ") |
103 | .append(table) |
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104 | .append(" FOR UPDATE"); |
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105 | ||
106 | 0 | statement.executeQuery(stmt.toString()); |
107 | 0 | } |
108 | ||
109 | /** |
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110 | * Unlocks the specified table. |
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111 | * |
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112 | * @param con The JDBC connection to use. |
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113 | * @param table The name of the table to unlock. |
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114 | * @throws SQLException No Statement could be created or executed. |
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115 | */ |
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116 | public void unlockTable(Connection con, String table) throws SQLException |
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117 | { |
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118 | // Tables in Sybase are unlocked when a commit is issued. The |
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119 | // user may have issued a commit but do it here to be sure. |
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120 | 0 | con.commit(); |
121 | 0 | } |
122 | ||
123 | /** |
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124 | * This method is used to chek whether the database natively |
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125 | * supports limiting the size of the resultset. |
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126 | * |
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127 | * @return True. |
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128 | */ |
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129 | public boolean supportsNativeLimit() |
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130 | { |
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131 | 0 | return true; |
132 | } |
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133 | ||
134 | /** |
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135 | * This method is used to chek whether the database supports |
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136 | * limiting the size of the resultset. |
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137 | * |
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138 | * @return LIMIT_STYLE_SYBASE. |
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139 | */ |
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140 | public int getLimitStyle() |
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141 | { |
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142 | 0 | return DB.LIMIT_STYLE_SYBASE; |
143 | } |
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144 | ||
145 | /** |
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146 | * This method overrides the JDBC escapes used to format dates |
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147 | * using a <code>DateFormat</code>. As of version 11, the Sybase |
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148 | * JDBC driver does not implement JDBC 3.0 escapes. |
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149 | * |
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150 | * @param date the date to format |
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151 | * @return The properly formatted date String. |
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152 | */ |
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153 | public String getDateString(Date date) |
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154 | { |
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155 | 0 | char delim = getStringDelimiter(); |
156 | 0 | return (delim + new SimpleDateFormat(DATE_FORMAT).format(date) + delim); |
157 | } |
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158 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |