Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/ResultData.java @ 5890:6ea004d51203
Datacage: Introduced <dc:group epxr="xpath" type="type"> ... </dc:group> and XPath function dc:group-key().
This splits the current result set into groups formed by expr. The type defaults to string.
Afterwards all these groups are iterated by there natural order.
The dc:group-key() gives access to the result of the grouping expression that forms a group.
Say, you have a result set like this:
name | description
-----+------------
a | foo
a | bar
b | baz
b | bla
c | blub
you can use:
<dc:group expr="$name">
<group name="{dc:group-key()}">
<dc:for-each>
<description value="{$description}"/>
</dc:for-each>
</group>
</dc:group>
to create:
<group name="a">
<description name="foo"/>
<description name="bar"/>
</group>
<group name="b">
<description name="baz"/>
<description name="bla"/>
</group>
<group name="c">
<description name="blub"/>
</group>
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Thu, 02 May 2013 20:52:18 +0200 |
parents | 4897a58c8746 |
children | af13ceeba52a |
rev | line source |
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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.artifacts.datacage.templating; |
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10 |
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11 import java.io.Serializable; |
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12 |
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13 import java.sql.ResultSetMetaData; |
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14 import java.sql.ResultSet; |
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15 import java.sql.SQLException; |
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16 |
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17 import java.util.List; |
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18 import java.util.ArrayList; |
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19 |
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20 import org.apache.log4j.Logger; |
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21 |
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23 /** Result Data from a DB/SQL query. */ | |
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24 public class ResultData |
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25 implements Serializable |
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26 { |
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27 private static Logger log = Logger.getLogger(ResultData.class); |
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28 |
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29 protected String [] columns; |
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30 |
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31 protected List<Object []> rows; |
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32 |
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33 public ResultData() { |
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34 rows = new ArrayList<Object []>(); |
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35 } |
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36 |
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37 public ResultData(String [] columns) { |
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38 this(columns, new ArrayList<Object []>()); |
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39 } |
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40 |
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41 public ResultData(String [] columns, List<Object []> rows) { |
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42 this.columns = columns; |
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43 this.rows = rows; |
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44 } |
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45 |
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46 public ResultData(ResultSetMetaData meta) |
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47 throws SQLException |
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48 { |
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49 this(); |
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50 |
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51 boolean debug = log.isDebugEnabled(); |
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52 |
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53 int N = meta.getColumnCount(); |
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54 |
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55 columns = new String[N]; |
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56 |
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57 if (debug) { |
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58 log.debug("ResultSet column names:"); |
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59 } |
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60 |
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61 for (int i = 1; i <= N; ++i) { |
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62 columns[i-1] = meta.getColumnLabel(i).toUpperCase(); |
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63 if (debug) { |
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64 log.debug(" " + i + ": " + columns[i-1]); |
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65 } |
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66 } |
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67 } |
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68 |
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69 public String [] getColumnLabels() { |
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70 return columns; |
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71 } |
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72 |
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73 public ResultData addAll(ResultSet result) throws SQLException { |
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74 while (result.next()) { |
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75 add(result); |
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76 } |
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77 return this; |
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78 } |
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79 |
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80 public void add(Object [] result) { |
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81 rows.add(result); |
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82 } |
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83 |
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84 public void add(ResultSet result) throws SQLException { |
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85 Object [] row = new Object[columns.length]; |
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86 for (int i = 0; i < columns.length; ++i) { |
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87 row[i] = result.getObject(i+1); |
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88 } |
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89 rows.add(row); |
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90 } |
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91 |
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92 public List<Object []> getRows() { |
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93 return rows; |
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94 } |
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95 |
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96 public boolean isEmpty() { |
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97 return rows.isEmpty(); |
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98 } |
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99 } |
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100 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |