PrintWhenExpressionReport

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PrintWhenExpressionReport

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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.miscellaneous;

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.column.TextColumnBuilder;
import net.sf.dynamicreports.report.builder.component.TextFieldBuilder;
import net.sf.dynamicreports.report.builder.component.VerticalListBuilder;
import net.sf.dynamicreports.report.builder.group.ColumnGroupBuilder;
import net.sf.dynamicreports.report.constant.Constants;
import net.sf.dynamicreports.report.constant.GroupHeaderLayout;
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 PrintWhenExpressionReport {

	public PrintWhenExpressionReport() {
		build();
	}

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

		ColumnGroupBuilder itemGroup = grp.group("itemGroup", itemColumn)
			.setHeaderLayout(GroupHeaderLayout.EMPTY);

		TextFieldBuilder<String> groupHeader = cmp.text(new GroupHeaderExpression())
			.setStyle(Templates.groupStyle)
			.setPrintWhenExpression(new PrintGroupHeaderExpression())
			.removeLineWhenBlank();

		VerticalListBuilder oddPageHeader = cmp.verticalList()
			.add(
				cmp.text("Odd page header").setStyle(Templates.bold12CenteredStyle),
				cmp.line())
			.setPrintWhenExpression(new PrintInOddPageExpression())
			.removeLineWhenBlank();

		VerticalListBuilder evenPageHeader = cmp.verticalList()
			.add(
				cmp.line(),
				cmp.text("Even page header").setStyle(Templates.bold12CenteredStyle),
				cmp.line())
			.setPrintWhenExpression(new PrintInEvenPageExpression())
			.removeLineWhenBlank();

		try {
			report()
			  .setTemplate(Templates.reportTemplate)
			  .setPageColumnsPerPage(2)
			  .setPageColumnSpace(5)
			  .columns(
			  	itemColumn,
			  	col.column("Quantity",   "quantity",  type.integerType()),
			  	col.column("Unit price", "unitprice", type.bigDecimalType()))
			  .groupBy(itemGroup)
			  .title(Templates.createTitleComponent("PrintWhenExpression"))
			  .detailHeader(
			  	cmp.columnBreak().setPrintWhenExpression(new PrintGroupHeaderColumnBreakExpression()),
			  	groupHeader)
			  .pageHeader(
			  	oddPageHeader, evenPageHeader, cmp.verticalGap(10))
			  .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 < 50; i++) {
			dataSource.add("DVD", (int) (Math.random() * 10) + 1, new BigDecimal(Math.random() * 100 + 1));
		}
		for (int i = 0; i < 50; i++) {
			dataSource.add("Book", (int) (Math.random() * 10) + 1, new BigDecimal(Math.random() * 100 + 1));
		}
		return dataSource;
	}

	public class GroupHeaderExpression extends AbstractSimpleExpression<String> {
		private static final long serialVersionUID = Constants.SERIAL_VERSION_UID;

		@Override
		public String evaluate(ReportParameters reportParameters) {
			return reportParameters.getValue("item");
		}
	}

	public class PrintGroupHeaderExpression extends AbstractSimpleExpression<Boolean> {
		private static final long serialVersionUID = Constants.SERIAL_VERSION_UID;

		@Override
		public Boolean evaluate(ReportParameters reportParameters) {
			return reportParameters.getColumnRowNumber() == 1 || reportParameters.getGroupCount("itemGroup") == 1;
		}
	}

	public class PrintGroupHeaderColumnBreakExpression extends AbstractSimpleExpression<Boolean> {
		private static final long serialVersionUID = Constants.SERIAL_VERSION_UID;

		@Override
		public Boolean evaluate(ReportParameters reportParameters) {
			return reportParameters.getColumnRowNumber() == 1 && reportParameters.getGroupCount("itemGroup") != 1;
		}
	}

	public class PrintInOddPageExpression extends AbstractSimpleExpression<Boolean> {
		private static final long serialVersionUID = Constants.SERIAL_VERSION_UID;

		@Override
		public Boolean evaluate(ReportParameters reportParameters) {
			return reportParameters.getPageNumber().doubleValue() % 2 != 0;
		}
	}

	public class PrintInEvenPageExpression extends AbstractSimpleExpression<Boolean> {
		private static final long serialVersionUID = Constants.SERIAL_VERSION_UID;

		@Override
		public Boolean evaluate(ReportParameters reportParameters) {
			return reportParameters.getPageNumber().doubleValue() % 2 == 0;
		}
	}

	public static void main(String[] args) {
		new PrintWhenExpressionReport();
	}
}
 
Tags: group, component, expression

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