VariableReport

UnitsReport

Examples overview

VirtualizerReport

VariableReport

/**
 * 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.miscellaneous;

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

import java.math.BigDecimal;
import java.util.List;

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.expression.AbstractComplexExpression;
import net.sf.dynamicreports.report.constant.Calculation;
import net.sf.dynamicreports.report.constant.Evaluation;
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 VariableReport {

        public VariableReport() {
                build();
        }

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

                VariableBuilder<Integer> itemCount = variable(itemColumn, Calculation.COUNT);
                VariableBuilder<Integer> quantitySum = variable("quantitySum", quantityColumn, Calculation.SUM);
                VariableBuilder<Integer> priceSum = variable(new PriceExpression(quantityColumn, unitPriceColumn), Calculation.SUM);

                try {
                        report()
                          .setTemplate(Templates.reportTemplate)
                          .variables(quantitySum)
                          .columns(
                                itemColumn, quantityColumn, unitPriceColumn)
                          .title(
                                Templates.createTitleComponent("Variable"),
                                cmp.horizontalList(cmp.text("Item count =").setFixedWidth(80), cmp.text(itemCount)),
                                cmp.text(new QuantitySumTextExpression()).setEvaluationTime(Evaluation.REPORT),
                                cmp.text(new UnitPriceSumTextExpression(unitPriceColumn)),
                                cmp.horizontalList(cmp.text("SUM(quantity * unit price) =").setFixedWidth(150), cmp.text(priceSum).setPattern("#,###.00")))
                          .pageFooter(Templates.footerComponent)
                          .setDataSource(createDataSource())
                          .show();
                } catch (DRException e) {
                        e.printStackTrace();
                }
        }

        private JRDataSource createDataSource() {
                DRDataSource dataSource = new DRDataSource("item", "quantity", "unitprice");
                for (int i = 0; i < 30; i++) {
                        dataSource.add("Book", (int) (Math.random() * 10) + 1, new BigDecimal(Math.random() * 100 + 1));
                }
                return dataSource;
        }

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

        private class QuantitySumTextExpression extends AbstractSimpleExpression<String> {
                private static final long serialVersionUID = 1L;

                @Override
                public String evaluate(ReportParameters reportParameters) {
                        Integer quantitySum = reportParameters.getValue("quantitySum");
                        return "Quantity sum = " + quantitySum;
                }
        }

        private class UnitPriceSumTextExpression extends AbstractComplexExpression<String> {
                private static final long serialVersionUID = 1L;

                public UnitPriceSumTextExpression(TextColumnBuilder<BigDecimal> unitPriceColumn) {
                        addExpression(variable(unitPriceColumn, Calculation.SUM));
                }

                @Override
                public String evaluate(List<?> values, ReportParameters reportParameters) {
                        BigDecimal unitPriceSum = (BigDecimal) values.get(0);
                        return "Unit price sum = " + type.bigDecimalType().valueToString(unitPriceSum, reportParameters.getLocale());
                }
        }

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

                private TextColumnBuilder<Integer> quantityColumn;
                private TextColumnBuilder<BigDecimal> unitPriceColumn;

                public PriceExpression(TextColumnBuilder<Integer> quantityColumn, TextColumnBuilder<BigDecimal> unitPriceColumn) {
                        this.quantityColumn = quantityColumn;
                        this.unitPriceColumn = unitPriceColumn;
                }

                @Override
                public BigDecimal evaluate(ReportParameters reportParameters) {
                        Integer quantity = reportParameters.getValue(quantityColumn);
                        BigDecimal unitPrice = reportParameters.getValue(unitPriceColumn);
                        return unitPrice.multiply(new BigDecimal(quantity));
                }
        }
}