Mercurial > dive4elements > river

annotate flys-aft/src/main/java/de/intevation/aft/WQDiff.java @ 4421:0b0f415203f0

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Add new Filter class to change caching Add new Filter class to avoid caching of GWT nocache files in browsers and http proxies. The new Filter class NoCacheFilter sets http headers to stop the proxies and browesers from storing the nocache files.
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 06 Nov 2012 13:32:06 +0100
parents 82f5266f881b
children b195fede1c3b
rev   line source
4096
82f5266f881b Add code to build the difference of the W/Q values of two discharge tables.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package de.intevation.aft;
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2
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3 import java.util.Collection;
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4 import java.util.Set;
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5 import java.util.TreeSet;
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6 import java.util.Iterator;
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7
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8 import java.sql.ResultSet;
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9 import java.sql.SQLException;
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10
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11 import de.intevation.db.ConnectedStatements;
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12 import de.intevation.db.SymbolicStatement;
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13
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14 public class WQDiff
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15 {
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16 protected Set<WQ> toAdd;
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17 protected Set<WQ> toDelete;
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18
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19 public WQDiff() {
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20 }
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21
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22 public WQDiff(Collection<WQ> a, Collection<WQ> b) {
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23 toAdd = new TreeSet<WQ>(WQ.EPS_CMP);
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24 toDelete = new TreeSet<WQ>(WQ.EPS_CMP);
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25 build(a, b);
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26 }
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27
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28 public void build(Collection<WQ> a, Collection<WQ> b) {
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29 toAdd.addAll(b);
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30 toAdd.removeAll(a);
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31
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32 toDelete.addAll(a);
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33 toDelete.removeAll(b);
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34 }
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35
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36 public void clear() {
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37 toAdd.clear();
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38 toDelete.clear();
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39 }
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40
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41 public Set<WQ> getToAdd() {
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42 return toAdd;
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43 }
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44
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45 public void setToAdd(Set<WQ> toAdd) {
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46 this.toAdd = toAdd;
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47 }
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48
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49 public Set<WQ> getToDelete() {
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50 return toDelete;
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51 }
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52
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53 public void setToDelete(Set<WQ> toDelete) {
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54 this.toDelete = toDelete;
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55 }
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56
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57 public boolean hasChanges() {
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58 return !(toAdd.isEmpty() && toDelete.isEmpty());
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59 }
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60
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61 public void writeChanges(
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62 SyncContext context,
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63 int tableId
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64 )
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65 throws SQLException
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66 {
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67 ConnectedStatements flysStatements = context.getFlysStatements();
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68
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69 // Delete the old entries
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70 if (!toDelete.isEmpty()) {
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71 SymbolicStatement.Instance deleteDTV =
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72 flysStatements.getStatement("delete.discharge.table.value");
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73 for (WQ wq: toDelete) {
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74 deleteDTV
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75 .clearParameters()
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76 .setInt("id", wq.getId())
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77 .execute();
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78 }
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79 }
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80
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81 // Add the new entries.
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82 if (!toAdd.isEmpty()) {
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83 SymbolicStatement.Instance nextId =
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84 flysStatements.getStatement("next.discharge.table.values.id");
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85
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86 SymbolicStatement.Instance insertDTV =
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87 flysStatements.getStatement("insert.discharge.table.value");
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88
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89 // Recycle old ids as much as possible.
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90 Iterator<WQ> oldIds = toDelete.iterator();
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91
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92 // Create ids for new entries.
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93 for (WQ wq: toAdd) {
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94 if (oldIds.hasNext()) {
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95 wq.setId(oldIds.next().getId());
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96 }
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97 else {
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98 ResultSet rs = nextId.executeQuery();
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99 rs.next();
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100 wq.setId(rs.getInt("discharge_table_values_id"));
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101 rs.close();
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102 }
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103 }
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104
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105 // Write the new entries.
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106 for (WQ wq: toAdd) {
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107 insertDTV
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108 .clearParameters()
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109 .setInt("id", wq.getId())
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110 .setInt("table_id", tableId)
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111 .setDouble("w", wq.getW())
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112 .setDouble("q", wq.getQ())
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113 .execute();
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114 }
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115 }
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116 }
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117 }
82f5266f881b Add code to build the difference of the W/Q values of two discharge tables.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
118 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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