Mercurial > dive4elements > river

annotate flys-aft/src/main/java/de/intevation/db/SymbolicStatement.java @ 4075:dbd0b3b1b8b8

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Sync each river. flys-aft/trunk@3419 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
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
4073
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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
http://dive4elements.wald.intevation.org