/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.extensions.charting;
import java.io.UnsupportedEncodingException;
import org.pentaho.reporting.engine.classic.core.AttributeNames;
import org.pentaho.reporting.engine.classic.core.ReportElement;
import org.pentaho.reporting.engine.classic.core.filter.types.ContentType;
import org.pentaho.reporting.engine.classic.core.filter.types.ElementTypeUtils;
import org.pentaho.reporting.engine.classic.core.function.ExpressionRuntime;
import org.pentaho.reporting.engine.classic.core.metadata.ElementMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.ElementTypeRegistry;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.w3c.dom.Document;
public class ChartElementType extends ContentType
{
private transient ElementMetaData elementType;
public ChartElementType()
{
}
public ElementMetaData getMetaData()
{
if (elementType == null)
{
elementType = ElementTypeRegistry.getInstance().getElementType("pentaho-chartbeans");
}
return elementType;
}
protected Object queryChartValue(final ReportElement element)
{
if (element == null)
{
throw new NullPointerException("Element must never be null.");
}
final Object attribute = element.getAttribute(ChartingModule.NAMESPACE, "chart-definition");
if (attribute != null)
{
return attribute;
}
return null;
}
public Object getValue(final ExpressionRuntime runtime,
final ReportElement element)
{
Object rawValue = queryChartValue(element);
if (rawValue instanceof String)
{
try
{
rawValue = String.valueOf(rawValue).getBytes("UTF-8");
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
}
else
{
rawValue = ElementTypeUtils.queryFieldOrValue(runtime, element);
if (rawValue == null)
{
return filter(runtime, element,
element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.NULL_VALUE));
}
}
try
{
final ResourceManager resourceManager = runtime.getProcessingContext().getResourceManager();
final ResourceKey chartKey;
if (rawValue instanceof String)
{
chartKey = resourceManager.deriveKey(runtime.getProcessingContext().getContentBase(), (String) rawValue);
}
else
{
chartKey = resourceManager.createKey(rawValue);
}
final Resource res = resourceManager.create(chartKey, null, Document.class);
return null;
}
catch (Throwable e)
{
return filter(runtime, element,
element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.NULL_VALUE));
}
}
}