MeasureExpressionCrosstabReport

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MeasureExpressionCrosstabReport

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/**
 * DynamicReports - Free Java reporting library for creating reports dynamically
 *
 * Copyright (C) 2010 - 2015 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.crosstab;

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.crosstab.CrosstabBuilder;
import net.sf.dynamicreports.report.builder.crosstab.CrosstabColumnGroupBuilder;
import net.sf.dynamicreports.report.builder.crosstab.CrosstabMeasureBuilder;
import net.sf.dynamicreports.report.builder.crosstab.CrosstabRowGroupBuilder;
import net.sf.dynamicreports.report.builder.crosstab.CrosstabVariableBuilder;
import net.sf.dynamicreports.report.constant.Calculation;
import net.sf.dynamicreports.report.constant.PageOrientation;
import net.sf.dynamicreports.report.constant.PageType;
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 MeasureExpressionCrosstabReport {
	private CrosstabMeasureBuilder<Integer> quantityMeasure;
	private CrosstabVariableBuilder<BigDecimal> unitPriceVariable;
	private CrosstabVariableBuilder<BigDecimal> priceVariable;

	public MeasureExpressionCrosstabReport() {
		build();
	}

	private void build() {
		CrosstabRowGroupBuilder<String> rowGroup = ctab.rowGroup("state", String.class)
		                                               .setTotalHeader("Total for state");

		CrosstabColumnGroupBuilder<String> columnGroup = ctab.columnGroup("item", String.class);

		unitPriceVariable = ctab.variable("unitprice", BigDecimal.class, Calculation.SUM);
		priceVariable = ctab.variable(new PriceExpression(), Calculation.SUM);
		quantityMeasure = ctab.measure("Quantity", "quantity", Integer.class, Calculation.SUM);
		//price1 = sum(unitprice) * sum(quantity)
		CrosstabMeasureBuilder<BigDecimal> priceMeasure1 = ctab.measure("Price1", new PriceMeasure1Expression());
		priceMeasure1.setDataType(type.bigDecimalType());
		//price2 = sum(unitprice * quantity)
		CrosstabMeasureBuilder<BigDecimal> priceMeasure2 = ctab.measure("Price2", new PriceMeasure2Expression());
		priceMeasure2.setDataType(type.bigDecimalType());

		CrosstabBuilder crosstab = ctab.crosstab()
			.headerCell(cmp.text("State / Item").setStyle(Templates.boldCenteredStyle))
			.setCellWidth(180)
			.rowGroups(rowGroup)
			.columnGroups(columnGroup)
			.variables(unitPriceVariable, priceVariable)
			.measures(quantityMeasure, priceMeasure1, priceMeasure2);

		try {
			report()
			  .setPageFormat(PageType.A4, PageOrientation.LANDSCAPE)
			  .setTemplate(Templates.reportTemplate)
			  .title(
			  	Templates.createTitleComponent("MeasureExpressionCrosstab"),
			  	cmp.text("Price1 = SUM(quantity) * SUM(unitPrice)").setStyle(Templates.boldStyle),
			  	cmp.text("Price2 = SUM(quantity * unitPrice)").setStyle(Templates.boldStyle))
			  .summary(crosstab)
			  .pageFooter(Templates.footerComponent)
			  .setDataSource(createDataSource())
			  .show();
		} catch (DRException e) {
			e.printStackTrace();
		}
	}

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

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

	private class PriceMeasure1Expression extends AbstractSimpleExpression<BigDecimal> {
		private static final long serialVersionUID = 1L;

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

	private class PriceMeasure2Expression extends AbstractSimpleExpression<BigDecimal> {
		private static final long serialVersionUID = 1L;

		@Override
		public BigDecimal evaluate(ReportParameters reportParameters) {
			return reportParameters.getValue(priceVariable);
		}
	}

	private JRDataSource createDataSource() {
		DRDataSource dataSource = new DRDataSource("state", "item", "quantity", "unitprice");
		dataSource.add("New York", "Notebook", 1, new BigDecimal(500));
		dataSource.add("New York", "DVD", 5, new BigDecimal(30));
		dataSource.add("New York", "DVD", 2, new BigDecimal(45));
		dataSource.add("New York", "DVD", 4, new BigDecimal(36));
		dataSource.add("New York", "DVD", 5, new BigDecimal(41));
		dataSource.add("New York", "Book", 2, new BigDecimal(11));
		dataSource.add("New York", "Book", 8, new BigDecimal(9));
		dataSource.add("New York", "Book", 6, new BigDecimal(14));

		dataSource.add("Washington", "Notebook", 1, new BigDecimal(610));
		dataSource.add("Washington", "DVD", 4, new BigDecimal(40));
		dataSource.add("Washington", "DVD", 6, new BigDecimal(35));
		dataSource.add("Washington", "DVD", 3, new BigDecimal(46));
		dataSource.add("Washington", "DVD", 2, new BigDecimal(42));
		dataSource.add("Washington", "Book", 3, new BigDecimal(12));
		dataSource.add("Washington", "Book", 9, new BigDecimal(8));
		dataSource.add("Washington", "Book", 4, new BigDecimal(14));
		dataSource.add("Washington", "Book", 5, new BigDecimal(10));

		dataSource.add("Florida", "Notebook", 1, new BigDecimal(460));
		dataSource.add("Florida", "DVD", 3, new BigDecimal(49));
		dataSource.add("Florida", "DVD", 4, new BigDecimal(32));
		dataSource.add("Florida", "DVD", 2, new BigDecimal(47));
		dataSource.add("Florida", "Book", 4, new BigDecimal(11));
		dataSource.add("Florida", "Book", 8, new BigDecimal(6));
		dataSource.add("Florida", "Book", 6, new BigDecimal(16));
		dataSource.add("Florida", "Book", 3, new BigDecimal(18));
		return dataSource;
	}

	public static void main(String[] args) {
		new MeasureExpressionCrosstabReport();
	}
}
 
Tags: expression, crosstab

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