java/sql-dk/src/info/globalcode/sql/dk/formatting/BarChartFormatter.java
branchv_0
changeset 238 4a1864c3e867
parent 237 7e08730da258
child 239 39e6c2ad3571
--- a/java/sql-dk/src/info/globalcode/sql/dk/formatting/BarChartFormatter.java	Mon Mar 04 17:06:42 2019 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,104 +0,0 @@
-/**
- * SQL-DK
- * Copyright © 2015 František Kučera (frantovo.cz)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-package info.globalcode.sql.dk.formatting;
-
-import info.globalcode.sql.dk.Functions;
-import info.globalcode.sql.dk.configuration.PropertyDeclaration;
-import info.globalcode.sql.dk.logging.LoggerProducer;
-import java.math.BigDecimal;
-import java.math.MathContext;
-import java.math.RoundingMode;
-import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-/**
- * TODO: min/max values – range for case that no value is 100 %
- *
- * TODO: multiple barcharts in same table (last column is still default) + multiple resultsets
- *
- * TODO: negative values - bar starting from the middle, not always from the left
- *
- * @author Ing. František Kučera (frantovo.cz)
- */
-@PropertyDeclaration(name = BarChartFormatter.PROPERTY_PRECISION, type = Integer.class, defaultValue = BarChartFormatter.PROPERTY_PRECISION_DEFAULT, description = "number of characters representing 100 % in the bar chart")
-public class BarChartFormatter extends TabularPrefetchingFormatter {
-
-	public static final String NAME = "barchart"; // bash-completion:formatter
-	public static final String PROPERTY_PRECISION = "precision";
-	protected static final String PROPERTY_PRECISION_DEFAULT = "100";
-	private static final MathContext mathContext = MathContext.DECIMAL128;
-	public static final Logger log = LoggerProducer.getLogger();
-	private final BigDecimal chartPrecision;
-	private final char chartFull;
-	private final char chartEmpty;
-
-	public BarChartFormatter(FormatterContext formatterContext) {
-		super(formatterContext);
-		chartPrecision = BigDecimal.valueOf(formatterContext.getProperties().getInteger(PROPERTY_PRECISION, Integer.parseInt(PROPERTY_PRECISION_DEFAULT)));
-		chartFull = isAsciiNostalgia() ? '#' : '█';
-		chartEmpty = isAsciiNostalgia() ? '~' : '░';
-		// TODO: consider using partial blocks for more precision: https://en.wikipedia.org/wiki/Block_Elements
-	}
-
-	@Override
-	protected void postprocessPrefetchedResultSet(ColumnsHeader currentHeader, List<Object[]> currentResultSet) {
-		super.postprocessPrefetchedResultSet(currentHeader, currentResultSet);
-
-		updateColumnWidth(currentHeader.getColumnCount(), chartPrecision.intValue());
-
-		BigDecimal maximum = BigDecimal.ZERO;
-		BigDecimal minimum = BigDecimal.ZERO;
-		int lastIndex = currentHeader.getColumnCount() - 1;
-
-		Object valueObject = null;
-		try {
-			for (Object[] row : currentResultSet) {
-				valueObject = row[lastIndex];
-				if (valueObject != null) {
-					BigDecimal value = new BigDecimal(valueObject.toString());
-					maximum = maximum.max(value);
-					minimum = minimum.min(value);
-				}
-			}
-
-			BigDecimal range = maximum.subtract(minimum);
-
-			for (Object[] row : currentResultSet) {
-				valueObject = row[lastIndex];
-				if (valueObject == null) {
-					row[lastIndex] = "";
-				} else {
-					BigDecimal value = new BigDecimal(valueObject.toString());
-					BigDecimal valueFromMinimum = value.subtract(minimum);
-
-					BigDecimal points = chartPrecision.divide(range, mathContext).multiply(valueFromMinimum, mathContext);
-					int pointsRounded = points.setScale(0, RoundingMode.HALF_UP).intValue();
-					row[lastIndex] = Functions.repeat(chartFull, pointsRounded) + Functions.repeat(chartEmpty, chartPrecision.intValue() - pointsRounded);
-				}
-			}
-
-		} catch (NumberFormatException e) {
-			// https://en.wiktionary.org/wiki/parsable
-			log.log(Level.SEVERE, "Last column must be number or an object with toString() value parsable to a number. But was „{0}“", valueObject);
-			// FIXME: throw FormatterException
-			throw e;
-		}
-	}
-
-}