Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/ResultData.java @ 6087:47775e3a8cf6
Datacage: Introduced <dc:virtual-column name="colname" type="type" expr="XPath">
dc:virtual-column can be used to virtual add or replace a column named 'colname' to
the current result set. The value is determined by evaluating "XPath", the type is
determined by "type" (possible values: number, bool, node, nodeset, string. defaults to string).
Usage:
<dc:virtual-column name="c" type="number" expr="$a+$b">
<dc:for-each>
<dc:message>{$a} + {$b} = {$c}</dc:message>
</dc:for-each>
</dc:virtual-column>
table
a | b
--+--
1 | 2
3 | 4
will result in:
1 + 2 = 3
3 + 4 = 7
author | Sascha L. Teichmann <teichmann@intevation.de> |
---|---|
date | Fri, 24 May 2013 12:19:25 +0200 |
parents | af13ceeba52a |
children | 0a5239a1e46e |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.artifacts.datacage.templating; import java.io.Serializable; import java.sql.ResultSetMetaData; import java.sql.ResultSet; import java.sql.SQLException; import java.util.List; import java.util.ArrayList; import org.apache.log4j.Logger; /** Result Data from a DB/SQL query. */ public class ResultData implements Serializable { private static Logger log = Logger.getLogger(ResultData.class); protected String [] columns; protected List<Object []> rows; public ResultData() { rows = new ArrayList<Object []>(); } public ResultData(String [] columns) { this(columns, new ArrayList<Object []>()); } public ResultData(String [] columns, List<Object []> rows) { this.columns = columns; this.rows = rows; } public ResultData(ResultSetMetaData meta) throws SQLException { this(); boolean debug = log.isDebugEnabled(); int N = meta.getColumnCount(); columns = new String[N]; if (debug) { log.debug("ResultSet column names:"); } for (int i = 1; i <= N; ++i) { columns[i-1] = meta.getColumnLabel(i).toUpperCase(); if (debug) { log.debug(" " + i + ": " + columns[i-1]); } } } public String [] getColumnLabels() { return columns; } public ResultData addAll(ResultSet result) throws SQLException { while (result.next()) { add(result); } return this; } public int indexOfColumn(String column) { for (int i = 0; i < columns.length; ++i) { if (columns[i].equalsIgnoreCase(column)) { return i; } } return -1; } public void add(Object [] result) { rows.add(result); } public void add(ResultSet result) throws SQLException { Object [] row = new Object[columns.length]; for (int i = 0; i < columns.length; ++i) { row[i] = result.getObject(i+1); } rows.add(row); } public List<Object []> getRows() { return rows; } public boolean isEmpty() { return rows.isEmpty(); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :