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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.ds;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Map;
import net.sf.jasperreports.data.AbstractClasspathAwareDataAdapterService;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRParameter;
import net.sf.jasperreports.engine.ParameterContributorContext;
import net.sf.jasperreports.engine.util.JRClassLoader;
/**
* @author Teodor Danciu ([email protected])
*/
public class DataSourceDataAdapterService extends
AbstractClasspathAwareDataAdapterService {
public static final String EXCEPTION_MESSAGE_KEY_INVALID_OBJECT_RETURNED = "data.ds.invalid.object.returned";
/**
*
*/
public DataSourceDataAdapterService(ParameterContributorContext paramContribContext, DataSourceDataAdapter dsDataAdapter)
{
super(paramContribContext, dsDataAdapter);
}
public DataSourceDataAdapter getDataSourceDataAdapter() {
return (DataSourceDataAdapter) 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);
}
@Override
public void contributeParameters(Map parameters) throws JRException
{
DataSourceDataAdapter dsDataAdapter = getDataSourceDataAdapter();
if (dsDataAdapter != null)
{
JRDataSource ds = null;
ClassLoader oldThreadClassLoader = Thread.currentThread().getContextClassLoader();
try
{
Thread.currentThread().setContextClassLoader(getClassLoader(oldThreadClassLoader));
Class clazz = JRClassLoader.loadClassForRealName(dsDataAdapter.getFactoryClass());
Object obj = null;
Method method = clazz.getMethod( dsDataAdapter.getMethodToCall(), new Class[0]);
if (!Modifier.isStatic(method.getModifiers()))
obj = clazz.getDeclaredConstructor().newInstance();
if (JRDataSource.class.isAssignableFrom(method.getReturnType()))
{
ds = (JRDataSource) method.invoke(obj,new Object[0]);
}
else
{
throw
new JRException(
EXCEPTION_MESSAGE_KEY_INVALID_OBJECT_RETURNED,
new Object[]{dsDataAdapter.getMethodToCall(), dsDataAdapter.getFactoryClass()});
}
}
catch (ClassNotFoundException | NoSuchMethodException | InvocationTargetException
| IllegalAccessException | InstantiationException e)
{
throw new JRException(e);
}
finally
{
Thread.currentThread().setContextClassLoader(oldThreadClassLoader);
}
parameters.put(JRParameter.REPORT_DATA_SOURCE, ds);
}
}
}