Mercurial > dive4elements > gnv-client
view gnv-artifacts/src/main/java/de/intevation/gnv/histogram/HistogramHelper.java @ 1119:7c4f81f74c47
merged gnv-artifacts
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Fri, 28 Sep 2012 12:14:00 +0200 |
parents | f953c9a559d8 |
children |
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/* * Copyright (c) 2010 by Intevation GmbH * * This program is free software under the LGPL (>=v2.1) * Read the file LGPL.txt coming with the software for details * or visit http://www.gnu.org/licenses/ if it does not exist. */ package de.intevation.gnv.histogram; import de.intevation.artifacts.CallContext; import de.intevation.gnv.artifacts.ressource.RessourceFactory; import de.intevation.gnv.chart.ChartLabels; import de.intevation.gnv.geobackend.base.Result; import de.intevation.gnv.geobackend.base.ResultDescriptor; import de.intevation.gnv.state.describedata.KeyValueDescibeData; import java.util.ArrayList; import java.util.Collection; import java.util.Iterator; import java.util.List; import java.util.Locale; import org.apache.log4j.Logger; /** * This class supports some helper methods for histogram charts. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class HistogramHelper { /** * Logger used for logging with log4j. */ private static Logger logger = Logger.getLogger(HistogramHelper.class); /** * Disabled HistogramHelper constructor. This is a helper class and no * instance should be instantiated from this class. */ private HistogramHelper() { } /** * This function prepare some input data and turns it into an array which is * taken by {@link de.intevation.gnv.chart.DefaultHistogram}. * * @param input A collection with the data used to be displayed in a * histogram * @param parameters A collection with a bunch of parameters * @param measurements A collection with a bunch of measurements * @param dates A collection with a bunch of dates * * @return Object[][] containing raw data which can be used to create * histograms */ public static Object[][] prepareHistogramData( Collection input, Collection parameters, Collection measurements, Collection dates ) { List names = new ArrayList<String>(); List data = new ArrayList<Double[]>(); if (logger.isDebugEnabled()) { logger.debug("############ prepare histogram data ##########"); logger.debug("Input data size: " + input.size()); } if (input == null) { return new Object[0][0]; } String break1, break2, break3; int b1Idx = -1; int b2Idx = -1; int b3Idx = -1; int yIdx = -1; try { Iterator iter = input.iterator(); if (iter.hasNext()) { Result row = (Result) iter.next(); Result previousRow = row; if (b1Idx == -1) { ResultDescriptor rd = row.getResultDescriptor(); b1Idx = rd.getColumnIndex("GROUP1"); b2Idx = rd.getColumnIndex("GROUP2"); b3Idx = rd.getColumnIndex("GROUP3"); yIdx = rd.getColumnIndex("YORDINATE"); if (b1Idx == -1 || b2Idx == -1 || b3Idx == -1 || yIdx == -1) { return new Object[0][0]; } } break1 = row.getString(b1Idx); break2 = row.getString(b2Idx); break3 = row.getString(b3Idx); List values = new ArrayList<Double>(); while (iter.hasNext()) { // found new series if (!break1.equals(row.getString(b1Idx)) || !break2.equals(row.getString(b2Idx)) || !break3.equals(row.getString(b3Idx)) ) { // get parameter name String name = generateName( break1, break2, break3, parameters, measurements, dates ); // add values and parameter name data.add((Double[]) values.toArray(new Double[values.size()])); names.add(name); if (logger.isDebugEnabled()) { logger.debug(" --- series name: " + name); logger.debug(" --- series items: " + values.size()); } values.clear(); Double yValue = row.getDouble(yIdx); if (yValue != null) values.add(yValue); // set new conditions to find new series break1 = row.getString(b1Idx); break2 = row.getString(b2Idx); break3 = row.getString(b3Idx); previousRow = row; row = (Result) iter.next(); } else { Double value = row.getDouble(yIdx); if (value != null) values.add(value); row = (Result) iter.next(); } } Double yValue = row.getDouble(yIdx); if (yValue != null) values.add(yValue); String name = generateName( break1, break2, break3, parameters, measurements, dates); if (logger.isDebugEnabled()) { logger.debug(" --- series name: " + name); logger.debug(" --- series items: " + values.size()); } data.add((Double[]) values.toArray(new Double[values.size()])); names.add(name); } } catch (Exception e) { logger.error(e.getMessage(), e); } int series = data.size(); logger.debug(" === Found total: " + series); Object[][] obj = new Object[series][2]; for (int i = 0; i < series; i++) { obj[i][0] = names.get(i); obj[i][1] = (Double[]) data.get(i); } return obj; } /** * This method generates a string made up of parameter name and a * measurement. * * @param break1 Id of a parameter. * @param break2 Id of a measurement. * @param break3 Id of a date. * @param parameters A collection with a bunch of parameters. * @param measurements A collection with a bunch of measurements. * @param dates A collection with a bunch of dates. * * @return Concatenated string (${parametername} + ${measurement} + m). */ protected static String generateName( String break1, String break2, String break3, Collection parameters, Collection measurements, Collection dates) { return findValueTitle(parameters,break1) + " " + findValueTitle(measurements,break2) + "m"; } /** * Find a value with the given <code>id</code> and return its description. * * @param values A collection which contains the value we are searching for * @param id Id of the value * * @return String representation of the value. An empty string is returned * if no value have been found with the given id. */ protected static String findValueTitle(Collection values, String id) { if (values != null) { Iterator it = values.iterator(); while (it.hasNext()) { KeyValueDescibeData data = (KeyValueDescibeData) it.next(); if (id.equals(data.getKey())) { return data.getValue(); } } } return ""; } /** * Creates and returns labels to decorate histograms. * * @param uuid The UUID of the current artifact. * @param context The CallContext object. * @param data An array storing strings. * @return A ChartLabels object with the 1st string in <i>data</i> as title. */ public static ChartLabels createHistogramLabels( String uuid, CallContext context, Locale locale, Object[] data) { RessourceFactory fac = RessourceFactory.getInstance(); return new ChartLabels( (String) data[0], "", "", fac.getRessource(locale, "histogram.axis.range.title", "")); } public static Object[][] prepareVectorialHistogramData(Collection input) { List names = new ArrayList<String>(); List data = new ArrayList<Double[]>(); if (logger.isDebugEnabled()) { logger.debug("######### prepare vectorial histogram data #######"); logger.debug("Input data size: " + input.size()); } if (input == null) { return new Object[0][0]; } int sIdx = -1; int yIdx = -1; String series = null; try { Iterator iter = input.iterator(); if (iter.hasNext()) { Result row = (Result) iter.next(); Result previousRow = row; if (sIdx == -1 || yIdx == -1) { ResultDescriptor rd = row.getResultDescriptor(); sIdx = rd.getColumnIndex("SERIES"); yIdx = rd.getColumnIndex("YORDINATE"); if (sIdx == -1 || yIdx == -1) { return new Object[0][0]; } } List values = new ArrayList<Double>(); while (iter.hasNext()) { row = (Result) iter.next(); // found new series if (series != null && !series.equals(row.getString(sIdx))) { // add values and parameter name data.add((Double[]) values.toArray(new Double[values.size()])); names.add(series); if (logger.isDebugEnabled()) { logger.debug(" --- series name: " + series); logger.debug(" --- series items: " + values.size()); } values.clear(); } Double value = row.getDouble(yIdx); if (value != null) values.add(value); series = row.getString(sIdx); } if (logger.isDebugEnabled()) { logger.debug(" --- series name: " + series); logger.debug(" --- series items: " + values.size()); } data.add((Double[]) values.toArray(new Double[values.size()])); names.add(series); } } catch (Exception e) { logger.error(e.getMessage(), e); } int count = data.size(); logger.debug(" === Found total: " + count); Object[][] obj = new Object[count][2]; for (int i = 0; i < count; i++) { obj[i][0] = names.get(i); obj[i][1] = (Double[]) data.get(i); } return obj; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :