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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2022 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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.
*
* JasperReports 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 JasperReports. If not, see .
*/
package net.sf.jasperreports.j2ee.servlets;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import net.sf.jasperreports.engine.DefaultJasperReportsContext;
import net.sf.jasperreports.engine.JRConstants;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReportsContext;
/**
* @author Teodor Danciu ([email protected])
*/
public abstract class BaseHttpServlet extends HttpServlet
{
private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
/**
*
*/
public static final String DEFAULT_JASPER_PRINT_LIST_SESSION_ATTRIBUTE = "net.sf.jasperreports.j2ee.jasper_print_list";
public static final String DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE = "net.sf.jasperreports.j2ee.jasper_print";
public static final String JASPER_PRINT_LIST_REQUEST_PARAMETER = "jrprintlist";
public static final String JASPER_PRINT_REQUEST_PARAMETER = "jrprint";
public static final String BUFFERED_OUTPUT_REQUEST_PARAMETER = "buffered";
/**
*
*/
public JasperReportsContext getJasperReportsContext()
{
return DefaultJasperReportsContext.getInstance();
}
/**
*
*/
public static List getJasperPrintList(HttpServletRequest request)
{
String jasperPrintListSessionAttr = request.getParameter(JASPER_PRINT_LIST_REQUEST_PARAMETER);
if (jasperPrintListSessionAttr == null)
{
jasperPrintListSessionAttr = DEFAULT_JASPER_PRINT_LIST_SESSION_ATTRIBUTE;
}
String jasperPrintSessionAttr = request.getParameter(JASPER_PRINT_REQUEST_PARAMETER);
if (jasperPrintSessionAttr == null)
{
jasperPrintSessionAttr = DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE;
}
List jasperPrintList = (List)request.getSession().getAttribute(jasperPrintListSessionAttr);
if (jasperPrintList == null)
{
JasperPrint jasperPrint = (JasperPrint)request.getSession().getAttribute(jasperPrintSessionAttr);
if (jasperPrint != null)
{
jasperPrintList = new ArrayList<>();
jasperPrintList.add(jasperPrint);
}
}
return jasperPrintList;
}
}