Mercurial > dive4elements > gnv-client
annotate geo-backend/src/main/java/de/intevation/gnv/geobackend/base/query/QueryExecutorBase.java @ 132:5a583cff97ea
Implementation of the Datainfrastructure for fetching Data from different DataStores.
geo-backend/trunk@12 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Tim Englich <tim.englich@intevation.de> |
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date | Fri, 04 Sep 2009 08:11:30 +0000 |
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children | 56655046194f |
rev | line source |
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132
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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1 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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2 * |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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3 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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4 package de.intevation.gnv.geobackend.base.query; |
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Tim Englich <tim.englich@intevation.de>
parents:
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5 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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6 import java.sql.ResultSet; |
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7 import java.sql.ResultSetMetaData; |
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8 import java.sql.SQLException; |
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9 import java.util.ArrayList; |
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10 import java.util.Collection; |
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11 import java.util.List; |
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12 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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13 import de.intevation.gnv.geobackend.base.DefaultResult; |
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14 import de.intevation.gnv.geobackend.base.DefaultResultDescriptor; |
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15 import de.intevation.gnv.geobackend.base.Result; |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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16 import de.intevation.gnv.geobackend.base.ResultDescriptor; |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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parents:
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17 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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18 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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19 * This is an abstract Basicimplementation of the Interface |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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20 * QueryExecutor providing several Helpermethods. |
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21 * @author Tim Englich <tim.englich@intevation.de> |
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Tim Englich <tim.englich@intevation.de>
parents:
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22 * |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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23 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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24 public abstract class QueryExecutorBase implements QueryExecutor { |
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25 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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26 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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27 * Constructor |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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28 */ |
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29 public QueryExecutorBase() { |
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30 super(); |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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31 } |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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32 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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33 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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34 * This Method puts the Filtervalues into the Querystring |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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35 * @param queryString the Query which should be manipulated |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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36 * @param filter the values which should be put into the Query |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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37 * @return the manipulated Query |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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38 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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39 protected String setFilterValues(String queryString, String[] filter){ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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40 String returnValue = queryString; |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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41 for (int i = 0; i < filter.length; i++){ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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42 returnValue = returnValue.replaceFirst("?", filter[i]); |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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43 } |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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44 return returnValue; |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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45 } |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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46 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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47 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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48 * This Methods converts the ResultSet into an Collection of Result-objects |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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49 * @param resultSet the ResultSet which should be converted |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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50 * @return an Collection containing Result-Objects |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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parents:
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51 * @throws SQLException |
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Tim Englich <tim.englich@intevation.de>
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52 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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53 protected Collection<Result> createResultCollection(ResultSet resultSet) throws SQLException{ |
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54 Collection<Result> returnValue = new ArrayList<Result>(); |
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55 |
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56 ResultDescriptor resultDescriptor = null; |
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57 int columns = -1; |
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58 List<String> columnNames = null; |
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59 while (resultSet.next()){ |
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60 if (resultDescriptor == null){ |
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61 resultDescriptor = new DefaultResultDescriptor(); |
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62 ResultSetMetaData rsmd = resultSet.getMetaData(); |
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63 columns = rsmd.getColumnCount(); |
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64 columnNames = new ArrayList<String>(columns); |
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65 for (int i = 1; i <= columns; i++){ |
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66 resultDescriptor.addColumn(rsmd.getColumnName(i), rsmd.getColumnClassName(i)); |
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67 columnNames.add(rsmd.getColumnName(i)); |
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68 } |
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69 } |
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70 |
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71 Result result = convertResult(resultSet, resultDescriptor,columnNames); |
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72 |
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73 returnValue.add(result); |
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74 } |
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75 return returnValue; |
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Tim Englich <tim.englich@intevation.de>
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76 } |
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Tim Englich <tim.englich@intevation.de>
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77 |
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Tim Englich <tim.englich@intevation.de>
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78 /** |
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79 * This Method converts one Singel ResultSetEntry into an Result-Object |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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80 * @param resultSet the ResultSet where the Entry should be took from. |
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parents:
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81 * @param resultDescriptor the ResultsetDescriptor which describes the Entry |
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82 * @param columnNames the Name of the Columns which Values should be fetched. |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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83 * @return an new Result-Objects containing the Values of the ResultSet-Entry |
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84 * @throws SQLException |
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85 */ |
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86 private Result convertResult(ResultSet resultSet, |
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87 ResultDescriptor resultDescriptor, List<String> columnNames) |
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88 throws SQLException { |
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89 Result result = new DefaultResult(resultDescriptor); |
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90 for (int i = 0; i < columnNames.size(); i++){ |
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91 String columnName = columnNames.get(i); |
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92 result.addColumnValue(columnName, resultSet.getObject(columnName)); |
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93 } |
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94 return result; |
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95 } |
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96 |
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97 } |