ScriptletReport

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ScriptletReport

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/**
 * 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.util.HashMap;
import java.util.Map;

import net.sf.dynamicreports.examples.Templates;
import net.sf.dynamicreports.report.base.AbstractScriptlet;
import net.sf.dynamicreports.report.base.expression.AbstractSimpleExpression;
import net.sf.dynamicreports.report.builder.column.TextColumnBuilder;
import net.sf.dynamicreports.report.builder.group.CustomGroupBuilder;
import net.sf.dynamicreports.report.builder.subtotal.CustomSubtotalBuilder;
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;

import org.apache.commons.lang3.StringUtils;

/**
 * @author Ricardo Mariaca (r.mariaca@dynamicreports.org)
 */
public class ScriptletReport {
        private Map<String, Integer> itemsCount;

        public ScriptletReport() {
                build();
        }

        private void build() {
                itemsCount = new HashMap<String, Integer>();

                TextColumnBuilder<String> itemColumn = col.column("Item", "item", type.stringType());
                CustomSubtotalBuilder<String> itemSbt = sbt.customValue(new ItemSubtotal(), itemColumn);
                CustomGroupBuilder group = grp.group("country", String.class);

                try {
                        report()
                          .setTemplate(Templates.reportTemplate)
                          .scriptlets(new ReportScriptlet())
                          .columns(itemColumn)
                          .groupBy(group)
                          .subtotalsAtGroupFooter(group, itemSbt)
                          .title(Templates.createTitleComponent("Scriptlet"))
                          .pageFooter(Templates.footerComponent)
                          .setDataSource(createDataSource())
                          .show();
                } catch (DRException e) {
                        e.printStackTrace();
                }
        }

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

                @Override
                public String evaluate(ReportParameters reportParameters) {
                        String result = "";
                        for (String item : itemsCount.keySet()) {
                                result += item + " = " + itemsCount.get(item) + "\n";
                        }
                        return StringUtils.removeEnd(result, "\n");
                }
        }

        private class ReportScriptlet extends AbstractScriptlet {

                @Override
                public void afterDetailEval(ReportParameters reportParameters) {
                        super.afterDetailEval(reportParameters);
                        String item = reportParameters.getValue("item");
                        Integer count;
                        if (itemsCount.containsKey(item)) {
                                count = itemsCount.get(item);
                        }
                        else {
                                count = 0;
                        }
                        itemsCount.put(item, ++count);
                }

                @Override
                public void afterGroupInit(String groupName, ReportParameters reportParameters) {
                        super.afterGroupInit(groupName, reportParameters);
                        itemsCount.clear();
                }
        }

        private JRDataSource createDataSource() {
                DRDataSource dataSource = new DRDataSource("country", "item");
                dataSource.add("USA", "Book");
                dataSource.add("USA", "DVD");
                dataSource.add("USA", "Book");
                dataSource.add("USA", "Book");
                dataSource.add("USA", "DVD");
                dataSource.add("USA", "Book");
                dataSource.add("USA", "DVD");

                dataSource.add("Canada", "Book");
                dataSource.add("Canada", "Book");
                dataSource.add("Canada", "DVD");
                dataSource.add("Canada", "Book");
                dataSource.add("Canada", "DVD");
                dataSource.add("Canada", "Phone");
                return dataSource;
        }

        public static void main(String[] args) {
                new ScriptletReport();
        }
}
 
Tags: group, subtotal, scriptlet, expression

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