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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.engine.xml;
import org.apache.commons.digester.Rule;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.xml.sax.Attributes;
import net.sf.jasperreports.engine.DatasetRunHolder;
import net.sf.jasperreports.engine.JRDatasetRun;
import net.sf.jasperreports.engine.JRRuntimeException;
/**
* @author Lucian Chirita ([email protected])
*/
public class DatasetRunReportContextRule extends Rule
{
private static final Log log = LogFactory.getLog(DatasetRunReportContextRule.class);
public static final String EXCEPTION_MESSAGE_KEY_CANNOT_LOCATE_STACK_OBJECT = "xml.digester.stack.cannot.locate.object";
private Class type;
public DatasetRunReportContextRule(Class type)
{
this.type = type;
}
@Override
public void begin(String namespace, String name, Attributes attributes)
throws Exception
{
JRXmlLoader xmlLoader = getXmlLoader();
T datasetRunHolder = findOnDigesterStack();
JRDatasetRun datasetRun = datasetRunHolder.getDatasetRun();
String datasetName = datasetRun == null ? null : datasetRun.getDatasetName();
if (log.isDebugEnabled())
{
log.debug("Pushing report context for dataset name " + datasetName);
}
XmlLoaderReportContext reportContext = new XmlLoaderReportContext(datasetName);
xmlLoader.pushReportContext(reportContext);
}
@Override
public void end(String namespace, String name) throws Exception
{
JRXmlLoader xmlLoader = getXmlLoader();
if (log.isDebugEnabled())
{
log.debug("Popping report context");
}
xmlLoader.popReportContext();
}
protected JRXmlLoader getXmlLoader()
{
return (JRXmlLoader) digester.peek(digester.getCount() - 1);
}
@SuppressWarnings("unchecked")
protected T findOnDigesterStack()
{
T element = null;
int stackCount = digester.getCount();
for (int idx = 0; idx < stackCount; ++idx)
{
Object stackObject = digester.peek(idx);
if (type.isInstance(stackObject))
{
element = (T) stackObject;
break;
}
}
if (element == null)
{
throw
new JRRuntimeException(
EXCEPTION_MESSAGE_KEY_CANNOT_LOCATE_STACK_OBJECT,
new Object[]{type.getName()});
}
return element;
}
}