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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 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.data.provider;
import java.lang.reflect.InvocationTargetException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Map;
import net.sf.jasperreports.data.AbstractClasspathAwareDataAdapterService;
import net.sf.jasperreports.engine.JRDataSourceProvider;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRParameter;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.ParameterContributorContext;
import net.sf.jasperreports.engine.util.JRClassLoader;
/**
* @author Teodor Danciu ([email protected])
*/
public class DataSourceProviderDataAdapterService extends AbstractClasspathAwareDataAdapterService
{
private JRDataSourceProvider provider = null;
/**
*
*/
public DataSourceProviderDataAdapterService(
ParameterContributorContext paramContribContext,
DataSourceProviderDataAdapter dsDataAdapter
)
{
super(paramContribContext, dsDataAdapter);
}
public DataSourceProviderDataAdapter getDataSourceProviderDataAdapter() {
return (DataSourceProviderDataAdapter) getDataAdapter();
}
@Override
protected ClassLoader getClassLoader(ClassLoader cloader) {
Object obj = getJasperReportsContext().getValue(CURRENT_CLASS_LOADER);
if (obj != null && obj instanceof ClassLoader)
cloader = (ClassLoader) obj;
URL[] localURLs = getPathClassloader();
if (localURLs == null || localURLs.length == 0)
return cloader;
return new URLClassLoader(localURLs, cloader);
}
public JRDataSourceProvider getProvider() throws JRException
{
if (provider == null)
{
DataSourceProviderDataAdapter dsDataAdapter = getDataSourceProviderDataAdapter();
if (dsDataAdapter != null)
{
ClassLoader oldThreadClassLoader = Thread.currentThread().getContextClassLoader();
try
{
// ClassLoader cloader = oldThreadClassLoader;
// Object obj = getJasperReportsContext().getValue(CURRENT_CLASS_LOADER);
// if(obj != null && obj instanceof ClassLoader)
// cloader = (ClassLoader)obj ;
// Thread.currentThread().setContextClassLoader(
// new CompositeClassloader(getClassLoader(), cloader)
// );
Thread.currentThread().setContextClassLoader(getClassLoader(oldThreadClassLoader));
Class clazz = JRClassLoader.loadClassForRealName(dsDataAdapter.getProviderClass());
provider = (JRDataSourceProvider) clazz.getDeclaredConstructor().newInstance();
// FIXME: I don't have a report, why I need a report??!
}
catch (ClassNotFoundException | IllegalAccessException | InstantiationException
| NoSuchMethodException | InvocationTargetException e)
{
throw new JRException(e);
}
finally
{
Thread.currentThread().setContextClassLoader(oldThreadClassLoader);
}
}
}
return provider;
}
@Override
public void contributeParameters(Map parameters) throws JRException
{
JRDataSourceProvider dsProvider = getProvider();
if (dsProvider != null)
{
JasperReport jr = (JasperReport) parameters.get(JRParameter.JASPER_REPORT);
parameters.put(JRParameter.REPORT_DATA_SOURCE, dsProvider.create(jr));
}
}
}