com.sonicle.webtop.core.app.ReportManager.java Source code

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Here is the source code for com.sonicle.webtop.core.app.ReportManager.java

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/*
 * WebTop Services is a Web Application framework developed by Sonicle S.r.l.
 * Copyright (C) 2014 Sonicle S.r.l.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by
 * the Free Software Foundation with the addition of the following permission
 * added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
 * WORK IN WHICH THE COPYRIGHT IS OWNED BY SONICLE, SONICLE DISCLAIMS THE
 * WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA.
 *
 * You can contact Sonicle S.r.l. at email address sonicle@sonicle.com
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License
 * version 3, these Appropriate Legal Notices must retain the display of the
 * Sonicle logo and Sonicle copyright notice. If the display of the logo is not
 * reasonably feasible for technical reasons, the Appropriate Legal Notices must
 * display the words "Copyright (C) 2014 Sonicle S.r.l.".
 */
package com.sonicle.webtop.core.app;

import com.sonicle.commons.LangUtils;
import com.sonicle.webtop.core.io.output.AbstractReport;
import com.sonicle.webtop.core.sdk.WTException;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ResourceBundle;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRParameter;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;

/**
 *
 * @author malbinola
 */
public class ReportManager {
    private static final Logger logger = WT.getLogger(ReportManager.class);
    private static boolean initialized = false;

    /**
     * Initialization method. This method should be called once.
     * @param wta WebTopApp instance.
     * @return The instance.
     */
    public static synchronized ReportManager initialize(WebTopApp wta) {
        if (initialized)
            throw new RuntimeException("Initialization already done");
        ReportManager rptm = new ReportManager(wta);
        initialized = true;
        logger.info("Initialized");
        return rptm;
    }

    private WebTopApp wta = null;

    /**
     * Private constructor.
     * Instances of this class must be created using static initialize method.
     * @param wta WebTopApp instance.
     */
    private ReportManager(WebTopApp wta) {
        this.wta = wta;
    }

    /**
     * Performs cleanup process.
     */
    void cleanup() {
        wta = null;
        logger.info("Cleaned up");
    }

    private void exportReportToPdfStream(JasperPrint jasperPrint, OutputStream outputStream) throws JRException {
        JasperExportManager.exportReportToPdfStream(jasperPrint, outputStream);
    }

    private void exportReportToHtmlStream(String domainId, JasperPrint jasperPrint, OutputStream outputStream)
            throws JRException, WTException {
        File temp = wta.createTempFile(domainId);
        FileInputStream fis = null;
        try {
            JasperExportManager.exportReportToHtmlFile(jasperPrint, temp.getAbsolutePath());
            fis = new FileInputStream(temp);
            IOUtils.copy(fis, outputStream);
        } catch (IOException ex) {
            throw new WTException(ex);
        } finally {
            IOUtils.closeQuietly(fis);
            wta.deleteTempFile(domainId, temp.getName());
        }
    }

    public void generateToStream(String domainId, AbstractReport report, AbstractReport.OutputType outputType,
            OutputStream outputStream) throws JRException, WTException {
        InputStream rptIs = null;

        try {
            if (!StringUtils.isBlank(report.getResourceBundleName())) {
                ResourceBundle bundle = loadResourceBundle(report);
                report.getParameters().put(JRParameter.REPORT_RESOURCE_BUNDLE, bundle);
            }

            rptIs = loadReport(report);
            JasperPrint jp = JasperFillManager.fillReport(rptIs, report.getParameters(), report.getDataSource());
            switch (outputType) {
            case HTML:
                exportReportToHtmlStream(domainId, jp, outputStream);
                break;
            case PDF:
                exportReportToPdfStream(jp, outputStream);
                break;
            }
        } finally {
            IOUtils.closeQuietly(rptIs);
        }
    }

    private ResourceBundle loadResourceBundle(AbstractReport report) throws WTException {
        if (report.getConfig().getLocale() == null)
            throw new WTException("Locale is required if /'HasResourceBundle/' is set to true");
        String path = report.getPath() + report.getResourceBundleName();
        return ResourceBundle.getBundle(path, report.getConfig().getLocale());
    }

    private InputStream loadReport(AbstractReport report) throws WTException {
        String rptName = report.getName() + ".jasper";
        String path = report.getPath() + rptName;
        ClassLoader cl = LangUtils.findClassLoader(report.getClass());
        InputStream is = cl.getResourceAsStream(path);
        if (is == null)
            throw new WTException("Unable to load resource [{0}]", path);
        return is;
    }
}