gumga.framework.application.service.JasperReportService.java Source code

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Here is the source code for gumga.framework.application.service.JasperReportService.java

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package gumga.framework.application.service;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import net.sf.jasperreports.engine.util.JRLoader;
import org.springframework.stereotype.Service;

/**
 *
 * @author gyowanny
 */
@Service(value = "reportService")
public class JasperReportService {

    /**
     * Gera o relatorio com os dados e parametros informados. Chamando este
     * metodo o programador pode exportar da forma como quiser a partir do
     * objeto <code>JasperPrint</code>. 
     * 
     * @param reportStream A input stream contendo o arquivo .jasper
     * @param data Os dados a serem populados no relatorio
     * @param params Os parametros do relatorio. Opcional
     * @return O relatorio populado mas nao renderizado
     * @throws JRException Quando houver erro no jasper
     * @throws IOException Quando houver erro no arquivo informado
     */
    public JasperPrint generateReport(InputStream reportStream, List data, Map<String, Object> params)
            throws JRException, IOException {
        if (data == null) {
            data = Collections.emptyList();
        }
        if (params == null) {
            params = new HashMap<>();
        }
        JasperReport jasperReport = (JasperReport) JRLoader.loadObject(reportStream);
        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params,
                new JRBeanCollectionDataSource(data));
        return jasperPrint;
    }

    /**
     * Gera o relatorio com os dados e parametros informados e exporta para HTML. 
     *
     * @param reportStream A input stream contendo o arquivo .jasper
     * @param data Os dados a serem populados no relatorio
     * @param params Os parametros do relatorio. Opcional
     * @param destFile O arquivo de destino
     * @throws JRException
     * @throws IOException 
     */
    public void exportReportToHtmlFile(InputStream reportStream, List data, Map<String, Object> params,
            String destFile) throws JRException, IOException {
        JasperPrint jp = generateReport(reportStream, data, params);
        JasperExportManager.exportReportToHtmlFile(jp, destFile);
    }

    /**
     * Gera e exporta o relatorio de acordo com o tipo informado. OBS: Nao
     * exporta para HTML.
     *
     * @param reportStream A input stream contendo o arquivo .jasper
     * @param data Os dados a serem populados no relatorio
     * @param params Os parametros do relatorio. Opcional
     * @param outStream A output stream onde ser salvo o relatrio
     * @param type O tipo do relatorio
     * @throws JRException Quando houver erro no jasper
     * @throws IOException Quando houver erro no arquivo informado
     */
    public void exportReport(InputStream reportStream, OutputStream outStream, List data,
            Map<String, Object> params, ReportType type) throws JRException, IOException {
        if (!ReportType.HTML.equals(type)) {
            JasperPrint jasperPrint = generateReport(reportStream, data, params);
            switch (type) {
            case PDF:
                JasperExportManager.exportReportToPdfStream(jasperPrint, outStream);
                break;
            default:
                JasperExportManager.exportReportToXmlStream(jasperPrint, outStream);
            }
        }
    }

}