Mercurial > dive4elements > river
annotate flys-aft/src/main/java/de/intevation/db/SymbolicStatement.java @ 4075:dbd0b3b1b8b8
Sync each river.
flys-aft/trunk@3419 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 14 Dec 2011 17:53:15 +0000 |
parents | 2c70fae83d0c |
children | 039413d7e394 |
rev | line source |
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1 package de.intevation.db; |
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2 |
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3 import java.util.List; |
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4 import java.util.ArrayList; |
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5 import java.util.Map; |
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6 import java.util.HashMap; |
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7 |
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8 import java.util.regex.Matcher; |
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9 import java.util.regex.Pattern; |
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10 |
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11 import java.sql.Connection; |
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12 import java.sql.SQLException; |
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13 import java.sql.PreparedStatement; |
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14 import java.sql.Timestamp; |
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15 import java.sql.ResultSet; |
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16 |
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17 import org.apache.log4j.Logger; |
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18 |
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19 public class SymbolicStatement { |
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20 |
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21 private static Logger log = Logger.getLogger(SymbolicStatement.class); |
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22 |
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23 public static final Pattern VAR = Pattern.compile(":([a-zA-Z0-9_]+)"); |
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24 |
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25 protected String statement; |
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26 protected String compiled; |
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27 protected Map<String, List<Integer>> positions; |
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28 |
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29 public class Instance { |
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30 |
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31 /** TODO: Support more types. */ |
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32 |
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33 protected PreparedStatement stmnt; |
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34 |
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35 public Instance(Connection connection) throws SQLException { |
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36 stmnt = connection.prepareStatement(compiled); |
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37 } |
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38 |
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39 public void close() { |
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40 try { |
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41 stmnt.close(); |
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42 } |
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43 catch (SQLException sqle) { |
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44 log.error("cannot close statement", sqle); |
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45 } |
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46 } |
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47 |
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48 public void setInt(String key, int value) |
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49 throws SQLException |
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50 { |
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51 List<Integer> pos = positions.get(key.toLowerCase()); |
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52 if (pos != null) { |
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53 for (Integer p: pos) { |
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54 stmnt.setInt(p, value); |
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55 } |
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56 } |
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57 } |
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58 |
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59 public void setString(String key, String value) |
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60 throws SQLException |
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61 { |
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62 List<Integer> pos = positions.get(key.toLowerCase()); |
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63 if (pos != null) { |
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64 for (Integer p: pos) { |
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65 stmnt.setString(p, value); |
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66 } |
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67 } |
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68 } |
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69 |
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70 public void setObject(String key, Object value) |
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71 throws SQLException |
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72 { |
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73 List<Integer> pos = positions.get(key.toLowerCase()); |
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74 if (pos != null) { |
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75 for (Integer p: pos) { |
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76 stmnt.setObject(p, value); |
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77 } |
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78 } |
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79 } |
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80 |
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81 public void setTimestamp(String key, Timestamp value) |
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82 throws SQLException |
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83 { |
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84 List<Integer> pos = positions.get(key.toLowerCase()); |
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85 if (pos != null) { |
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86 for (Integer p: pos) { |
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87 stmnt.setTimestamp(p, value); |
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88 } |
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89 } |
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90 } |
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91 |
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92 public void setDouble(String key, int value) |
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93 throws SQLException |
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94 { |
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95 List<Integer> pos = positions.get(key.toLowerCase()); |
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96 if (pos != null) { |
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97 for (Integer p: pos) { |
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98 stmnt.setDouble(p, value); |
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99 } |
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100 } |
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101 } |
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102 |
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103 public void setNull(String key, int sqlType) |
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104 throws SQLException |
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105 { |
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106 List<Integer> pos = positions.get(key.toLowerCase()); |
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107 if (pos != null) { |
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108 for (Integer p: pos) { |
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109 stmnt.setNull(p, sqlType); |
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110 } |
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111 } |
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112 } |
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113 |
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114 public void set(Map<String, Object> map) throws SQLException { |
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115 for (Map.Entry<String, Object> entry: map.entrySet()) { |
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116 setObject(entry.getKey(), entry.getValue()); |
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117 } |
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118 } |
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119 |
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120 public void clearParameters() throws SQLException { |
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121 stmnt.clearParameters(); |
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122 } |
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123 |
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124 public boolean execute() throws SQLException { |
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125 return stmnt.execute(); |
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126 } |
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127 |
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128 public ResultSet executeQuery() throws SQLException { |
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129 return stmnt.executeQuery(); |
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130 } |
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131 |
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132 public int executeUpdate() throws SQLException { |
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133 return stmnt.executeUpdate(); |
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134 } |
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135 |
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136 } // class Instance |
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137 |
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138 public SymbolicStatement(String statement) { |
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139 this.statement = statement; |
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140 compile(); |
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141 } |
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142 |
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143 public String getStatement() { |
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144 return statement; |
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145 } |
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146 |
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147 protected void compile() { |
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148 positions = new HashMap<String, List<Integer>>(); |
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149 |
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150 StringBuffer sb = new StringBuffer(); |
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151 Matcher m = VAR.matcher(statement); |
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152 int index = 1; |
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153 while (m.find()) { |
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154 String key = m.group(1).toLowerCase(); |
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155 List<Integer> list = positions.get(key); |
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156 if (list == null) { |
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157 list = new ArrayList<Integer>(); |
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158 positions.put(key, list); |
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159 } |
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160 list.add(index++); |
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161 m.appendReplacement(sb, "?"); |
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162 } |
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163 m.appendTail(sb); |
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164 compiled = sb.toString(); |
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165 } |
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166 } // class SymbolicStatement |