Mercurial > dive4elements > river

annotate etl/src/main/java/org/dive4elements/river/etl/db/SymbolicStatement.java @ 9801:1d7a72a50183 3.2.x tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
rev   line source
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8bd9b551456c Added header to Java files in ETL process.
Sascha L. Teichmann <teichmann@intevation.de>
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.etl.db;
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10
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11 import java.sql.Connection;
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12 import java.sql.PreparedStatement;
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13 import java.sql.ResultSet;
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14 import java.sql.SQLException;
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15 import java.sql.Timestamp;
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16
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17 import java.util.ArrayList;
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18 import java.util.HashMap;
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19 import java.util.List;
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20 import java.util.Map;
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21
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22 import java.util.regex.Matcher;
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23 import java.util.regex.Pattern;
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24
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25 import org.apache.logging.log4j.Logger;
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26 import org.apache.logging.log4j.LogManager;
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27
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28 public class SymbolicStatement {
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29
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30 private static Logger log = LogManager.getLogger(SymbolicStatement.class);
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31
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32 public static final Pattern VAR = Pattern.compile(":([a-zA-Z0-9_]+)");
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33
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34 protected String statement;
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35 protected String compiled;
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36 protected Map<String, List<Integer>> positions;
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37
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38 public class Instance {
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39
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40 /** TODO: Support more types. */
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41
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42 protected PreparedStatement stmnt;
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43
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44 public Instance(Connection connection) throws SQLException {
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45 stmnt = connection.prepareStatement(compiled);
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46 }
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47
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48 public void close() {
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49 try {
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50 stmnt.close();
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51 }
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52 catch (SQLException sqle) {
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53 log.error("cannot close statement", sqle);
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54 }
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55 }
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56
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57 public Instance setInt(String key, int value)
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58 throws SQLException
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59 {
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60 List<Integer> pos = positions.get(key.toLowerCase());
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61 if (pos != null) {
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62 for (Integer p: pos) {
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63 stmnt.setInt(p, value);
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64 }
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65 }
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66
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67 return this;
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68 }
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69
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70 public Instance setString(String key, String 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.setString(p, value);
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77 }
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78 }
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79 return this;
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80 }
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81
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82 public Instance setObject(String key, Object value)
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83 throws SQLException
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84 {
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85 List<Integer> pos = positions.get(key.toLowerCase());
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86 if (pos != null) {
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87 for (Integer p: pos) {
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88 stmnt.setObject(p, value);
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89 }
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90 }
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91 return this;
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92 }
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93
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94 public Instance setTimestamp(String key, Timestamp value)
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95 throws SQLException
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96 {
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97 List<Integer> pos = positions.get(key.toLowerCase());
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98 if (pos != null) {
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99 for (Integer p: pos) {
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100 stmnt.setTimestamp(p, value);
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101 }
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102 }
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103 return this;
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104 }
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105
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106 public Instance setDouble(String key, double value)
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107 throws SQLException
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108 {
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109 List<Integer> pos = positions.get(key.toLowerCase());
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110 if (pos != null) {
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111 for (Integer p: pos) {
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112 stmnt.setDouble(p, value);
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113 }
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114 }
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115 return this;
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116 }
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117
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118 public Instance setLong(String key, long value)
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119 throws SQLException
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120 {
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121 List<Integer> pos = positions.get(key.toLowerCase());
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122 if (pos != null) {
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123 for (Integer p: pos) {
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124 stmnt.setLong(p, value);
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125 }
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126 }
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127 return this;
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128 }
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129
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130 public Instance setNull(String key, int sqlType)
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131 throws SQLException
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132 {
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133 List<Integer> pos = positions.get(key.toLowerCase());
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134 if (pos != null) {
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135 for (Integer p: pos) {
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136 stmnt.setNull(p, sqlType);
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137 }
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138 }
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139 return this;
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140 }
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141
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142 public Instance set(Map<String, Object> map) throws SQLException {
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143 for (Map.Entry<String, Object> entry: map.entrySet()) {
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144 setObject(entry.getKey(), entry.getValue());
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145 }
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146 return this;
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147 }
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148
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149 public Instance clearParameters() throws SQLException {
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150 stmnt.clearParameters();
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151 return this;
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152 }
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153
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154 public boolean execute() throws SQLException {
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155 if (log.isDebugEnabled()) {
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156 log.debug("execute: " + compiled);
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157 }
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158 return stmnt.execute();
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159 }
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160
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161 public ResultSet executeQuery() throws SQLException {
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162 if (log.isDebugEnabled()) {
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163 log.debug("query: " + compiled);
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164 }
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165 return stmnt.executeQuery();
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166 }
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167
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168 public int executeUpdate() throws SQLException {
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169 if (log.isDebugEnabled()) {
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170 log.debug("update: " + compiled);
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171 }
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172 return stmnt.executeUpdate();
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173 }
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174
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175 } // class Instance
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176
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177 public SymbolicStatement(String statement) {
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178 this.statement = statement;
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179 compile();
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180 }
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181
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182 public String getStatement() {
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183 return statement;
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184 }
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185
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186 protected void compile() {
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187 positions = new HashMap<String, List<Integer>>();
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188
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189 StringBuffer sb = new StringBuffer();
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190 Matcher m = VAR.matcher(statement);
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191 int index = 1;
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192 while (m.find()) {
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193 String key = m.group(1).toLowerCase();
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194 List<Integer> list = positions.get(key);
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195 if (list == null) {
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196 list = new ArrayList<Integer>();
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197 positions.put(key, list);
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198 }
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199 list.add(index++);
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200 m.appendReplacement(sb, "?");
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201 }
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202 m.appendTail(sb);
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203 compiled = sb.toString();
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204 }
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205 } // class SymbolicStatement
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