Conditional StyleΒΆ

../../_images/ConditionalStyleReport.png 
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/**
 * DynamicReports - Free Java reporting library for creating reports dynamically
 *
 * Copyright (C) 2010 - 2018 Ricardo Mariaca
 * http://www.dynamicreports.org
 *
 * This file is part of DynamicReports.
 *
 * DynamicReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DynamicReports 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with DynamicReports. If not, see <http://www.gnu.org/licenses/>.
 */

package net.sf.dynamicreports.examples.style;

import static net.sf.dynamicreports.report.builder.DynamicReports.*;

import java.awt.Color;
import java.math.BigDecimal;
import java.util.Calendar;
import java.util.Date;

import net.sf.dynamicreports.examples.Templates;
import net.sf.dynamicreports.report.base.expression.AbstractSimpleExpression;
import net.sf.dynamicreports.report.builder.column.TextColumnBuilder;
import net.sf.dynamicreports.report.builder.style.ConditionalStyleBuilder;
import net.sf.dynamicreports.report.builder.style.StyleBuilder;
import net.sf.dynamicreports.report.datasource.DRDataSource;
import net.sf.dynamicreports.report.definition.ReportParameters;
import net.sf.dynamicreports.report.exception.DRException;
import net.sf.jasperreports.engine.JRDataSource;

/**
 * @author Ricardo Mariaca (r.mariaca@dynamicreports.org)
 */
public class ConditionalStyleReport {

	public ConditionalStyleReport() {
		build();
	}

	private void build() {
		TextColumnBuilder<String> itemColumn = col.column("Item", "item", type.stringType());
		TextColumnBuilder<Date> orderDateColumn = col.column("Order date", "orderdate", type.dateType());
		TextColumnBuilder<Integer> quantityColumn = col.column("Quantity", "quantity", type.integerType());
		TextColumnBuilder<BigDecimal> unitPriceColumn = col.column("Unit price", "unitprice", type.bigDecimalType());

		ConditionalStyleBuilder condition1 = stl.conditionalStyle(new OrderDateConditionExpression())
				.setBackgroundColor(new Color(255, 210, 210));
		ConditionalStyleBuilder condition2 = stl.conditionalStyle(cnd.greater(unitPriceColumn, 20))
				.setBackgroundColor(new Color(210, 255, 210));

		StyleBuilder orderDateStyle = stl.style()
				.conditionalStyles(condition1);
		orderDateColumn.setStyle(orderDateStyle);

		StyleBuilder unitPriceStyle = stl.style()
				.conditionalStyles(condition2);
		unitPriceColumn.setStyle(unitPriceStyle);

		try {
			report()
					.setTemplate(Templates.reportTemplate)
					.columns(
							itemColumn, orderDateColumn, quantityColumn, unitPriceColumn)
					.title(Templates.createTitleComponent("ConditionalStyle"))
					.pageFooter(Templates.footerComponent)
					.setDataSource(createDataSource())
					.show();
		} catch (DRException e) {
			e.printStackTrace();
		}
	}

	private JRDataSource createDataSource() {
		DRDataSource dataSource = new DRDataSource("item", "orderdate", "quantity", "unitprice");
		dataSource.add("DVD", toDate(2010, 1, 1), 5, new BigDecimal(30));
		dataSource.add("DVD", toDate(2010, 1, 3), 1, new BigDecimal(28));
		dataSource.add("DVD", toDate(2010, 1, 19), 5, new BigDecimal(32));
		dataSource.add("Book", toDate(2010, 1, 5), 3, new BigDecimal(11));
		dataSource.add("Book", toDate(2010, 1, 11), 1, new BigDecimal(15));
		dataSource.add("Book", toDate(2010, 1, 15), 5, new BigDecimal(10));
		dataSource.add("Book", toDate(2010, 1, 20), 8, new BigDecimal(9));
		return dataSource;
	}

	private Date toDate(int year, int month, int day) {
		Calendar c = Calendar.getInstance();
		c.set(Calendar.YEAR, year);
		c.set(Calendar.MONTH, month - 1);
		c.set(Calendar.DAY_OF_MONTH, day);
		return c.getTime();
	}

	public static void main(String[] args) {
		new ConditionalStyleReport();
	}

	private class OrderDateConditionExpression extends AbstractSimpleExpression<Boolean> {
		private static final long serialVersionUID = 1L;

		@Override
		public Boolean evaluate(ReportParameters reportParameters) {
			Date orderDate = reportParameters.getValue("orderdate");
			Integer quantity = reportParameters.getValue("quantity");
			return orderDate.after(toDate(2010, 1, 10)) && quantity > 1;
		}
	}
}