Mercurial > dive4elements > river

annotate flys-aft/src/main/java/de/intevation/db/SymbolicStatement.java @ 4089:859b4781554a

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Prefetch existing time intervals from FLYS db. flys-aft/trunk@3574 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 03 Jan 2012 12:25:06 +0000
parents aad1886ea226
children 981de0b77c6b
rev   line source
4073
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package de.intevation.db;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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2
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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3 import java.util.List;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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4 import java.util.ArrayList;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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5 import java.util.Map;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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6 import java.util.HashMap;
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7
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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8 import java.util.regex.Matcher;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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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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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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12 import java.sql.SQLException;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13 import java.sql.PreparedStatement;
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14 import java.sql.Timestamp;
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dbd0b3b1b8b8 Sync each river.
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parents: 4073
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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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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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19 public class SymbolicStatement {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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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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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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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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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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39 public void close() {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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40 try {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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41 stmnt.close();
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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42 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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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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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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46 }
2c70fae83d0c start syncing at river level.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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47
4076
039413d7e394 Load gauges from both dbs.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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48 public Instance setInt(String key, int value)
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49 throws SQLException
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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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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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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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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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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56 }
4076
039413d7e394 Load gauges from both dbs.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4075
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57
039413d7e394 Load gauges from both dbs.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4075
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58 return this;
4073
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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59 }
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60
4076
039413d7e394 Load gauges from both dbs.
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parents: 4075
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61 public Instance setString(String key, String value)
4073
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62 throws SQLException
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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63 {
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64 List<Integer> pos = positions.get(key.toLowerCase());
2c70fae83d0c start syncing at river level.
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parents:
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65 if (pos != null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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66 for (Integer p: pos) {
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67 stmnt.setString(p, value);
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68 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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69 }
4076
039413d7e394 Load gauges from both dbs.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4075
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70 return this;
4073
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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71 }
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72
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039413d7e394 Load gauges from both dbs.
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73 public Instance setObject(String key, Object value)
4073
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74 throws SQLException
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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75 {
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76 List<Integer> pos = positions.get(key.toLowerCase());
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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77 if (pos != null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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78 for (Integer p: pos) {
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79 stmnt.setObject(p, value);
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parents:
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80 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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81 }
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039413d7e394 Load gauges from both dbs.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4075
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82 return this;
4073
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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83 }
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84
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039413d7e394 Load gauges from both dbs.
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parents: 4075
diff changeset
85 public Instance setTimestamp(String key, Timestamp value)
4073
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parents:
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86 throws SQLException
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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87 {
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88 List<Integer> pos = positions.get(key.toLowerCase());
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parents:
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89 if (pos != null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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90 for (Integer p: pos) {
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parents:
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91 stmnt.setTimestamp(p, value);
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parents:
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92 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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93 }
4076
039413d7e394 Load gauges from both dbs.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4075
diff changeset
94 return this;
4073
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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95 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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96
4087
aad1886ea226 Store new gauges in FLYS db.
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parents: 4076
diff changeset
97 public Instance setDouble(String key, double value)
4073
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98 throws SQLException
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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99 {
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100 List<Integer> pos = positions.get(key.toLowerCase());
2c70fae83d0c start syncing at river level.
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parents:
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101 if (pos != null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
102 for (Integer p: pos) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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103 stmnt.setDouble(p, value);
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parents:
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104 }
2c70fae83d0c start syncing at river level.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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105 }
4076
039413d7e394 Load gauges from both dbs.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4075
diff changeset
106 return this;
4073
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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107 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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108
4076
039413d7e394 Load gauges from both dbs.
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parents: 4075
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109 public Instance setNull(String key, int sqlType)
4073
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parents:
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110 throws SQLException
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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111 {
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parents:
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112 List<Integer> pos = positions.get(key.toLowerCase());
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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113 if (pos != null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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114 for (Integer p: pos) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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115 stmnt.setNull(p, sqlType);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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116 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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117 }
4076
039413d7e394 Load gauges from both dbs.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4075
diff changeset
118 return this;
4073
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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119 }
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parents:
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120
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039413d7e394 Load gauges from both dbs.
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parents: 4075
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121 public Instance set(Map<String, Object> map) throws SQLException {
4073
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122 for (Map.Entry<String, Object> entry: map.entrySet()) {
2c70fae83d0c start syncing at river level.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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123 setObject(entry.getKey(), entry.getValue());
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parents:
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124 }
4076
039413d7e394 Load gauges from both dbs.
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parents: 4075
diff changeset
125 return this;
4073
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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126 }
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parents:
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127
4076
039413d7e394 Load gauges from both dbs.
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parents: 4075
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128 public Instance clearParameters() throws SQLException {
4073
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parents:
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129 stmnt.clearParameters();
4076
039413d7e394 Load gauges from both dbs.
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diff changeset
130 return this;
4073
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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131 }
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132
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133 public boolean execute() throws SQLException {
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134 return stmnt.execute();
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135 }
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136
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137 public ResultSet executeQuery() throws SQLException {
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138 return stmnt.executeQuery();
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139 }
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140
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141 public int executeUpdate() throws SQLException {
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142 return stmnt.executeUpdate();
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143 }
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144
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145 } // class Instance
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146
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147 public SymbolicStatement(String statement) {
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148 this.statement = statement;
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149 compile();
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150 }
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151
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152 public String getStatement() {
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153 return statement;
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154 }
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155
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156 protected void compile() {
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157 positions = new HashMap<String, List<Integer>>();
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158
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159 StringBuffer sb = new StringBuffer();
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160 Matcher m = VAR.matcher(statement);
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161 int index = 1;
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162 while (m.find()) {
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163 String key = m.group(1).toLowerCase();
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164 List<Integer> list = positions.get(key);
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165 if (list == null) {
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166 list = new ArrayList<Integer>();
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167 positions.put(key, list);
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168 }
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169 list.add(index++);
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170 m.appendReplacement(sb, "?");
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171 }
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172 m.appendTail(sb);
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173 compiled = sb.toString();
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174 }
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175 } // class SymbolicStatement
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