VariableSubtotalReport

PercentageSubtotalReport

Examples overview

CustomTableOfContentsReport

VariableSubtotalReport

/**
 * DynamicReports - Free Java reporting library for creating reports dynamically
 *
 * Copyright (C) 2010 - 2015 Ricardo Mariaca
 * http://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.subtotal;

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

import java.math.BigDecimal;

import net.sf.dynamicreports.examples.Templates;
import net.sf.dynamicreports.report.base.expression.AbstractSimpleExpression;
import net.sf.dynamicreports.report.builder.VariableBuilder;
import net.sf.dynamicreports.report.builder.column.TextColumnBuilder;
import net.sf.dynamicreports.report.builder.subtotal.CustomSubtotalBuilder;
import net.sf.dynamicreports.report.constant.Calculation;
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 VariableSubtotalReport {
        private VariableBuilder<Integer> quantitySum;
        private VariableBuilder<BigDecimal> priceSum;

        public VariableSubtotalReport() {
                build();
        }

        private void build() {
                quantitySum = variable("quantity", Integer.class, Calculation.SUM);
                priceSum = variable("price", BigDecimal.class, Calculation.SUM);

                TextColumnBuilder<String> itemColumn = col.column("Item", "item", type.stringType());

                CustomSubtotalBuilder<BigDecimal> unitPriceSbt = sbt.customValue(new UnitPriceSubtotal(), itemColumn)
                        .setLabel("sum(price) / sum(quantity)")
                        .setDataType(type.bigDecimalType());

                try {
                        report()
                                .setTemplate(Templates.reportTemplate)
                                .variables(
                                        quantitySum, priceSum)
                                .columns(
                                        itemColumn)
                                .subtotalsAtSummary(
                                        unitPriceSbt)
                                .title(Templates.createTitleComponent("VariableSubtotal"))
                                .pageFooter(Templates.footerComponent)
                                .setDataSource(createDataSource())
                                .show();
                } catch (DRException e) {
                        e.printStackTrace();
                }
        }

        private class UnitPriceSubtotal extends AbstractSimpleExpression<BigDecimal> {
                private static final long serialVersionUID = 1L;

                @Override
                public BigDecimal evaluate(ReportParameters reportParameters) {
                        Integer quantitySumValue = reportParameters.getValue(quantitySum);
                        BigDecimal priceSumValue = reportParameters.getValue(priceSum);
                        return priceSumValue.divide(new BigDecimal(quantitySumValue), 2, BigDecimal.ROUND_HALF_UP);
                }
        }

        private JRDataSource createDataSource() {
                DRDataSource dataSource = new DRDataSource("item", "quantity", "price");
                dataSource.add("Tablet", 3, new BigDecimal(330));
                dataSource.add("Tablet", 1, new BigDecimal(150));
                dataSource.add("Laptop", 3, new BigDecimal(900));
                dataSource.add("Smartphone", 8, new BigDecimal(720));
                dataSource.add("Smartphone", 6, new BigDecimal(720));
                return dataSource;
        }

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