/*
* 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) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.extensions.modules.sparklines;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.reporting.engine.classic.core.metadata.ElementMetaDataParser;
import org.pentaho.reporting.libraries.base.boot.AbstractModule;
import org.pentaho.reporting.libraries.base.boot.ModuleInitializeException;
import org.pentaho.reporting.libraries.base.boot.SubSystem;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
/**
* This module adds support for Sparkline graphs. Sparkline graphs are tiny word sized graphs allowing a rather fast
* reading of data evolution over the time (usual case).<br/> Such graphs can be seen as tiny linecharts or barcharts.
* <p/>
* For additional reading check out <a href="http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0001OR">
* Sparklines: theory and practice</a> thread.
* <p/>
* This module adds BarSparkline and LineSparkline graph element types to the reporting engine.
*
* @author Thomas Morgner
*/
public class SparklineModule extends AbstractModule
{
// Extensions share the same namespace for the XML-Element itself and the Attributes for the sake of simplicity.
public static final String NAMESPACE = SparklineAttributeNames.NAMESPACE;
public SparklineModule() throws ModuleInitializeException
{
loadModuleInfo();
}
/**
* Initializes the module. Use this method to perform all initial setup operations. This method is called only once in
* a modules lifetime. If the initializing cannot be completed, throw a ModuleInitializeException to indicate the
* error,. The module will not be available to the system.
*
* @param subSystem the subSystem.
* @throws ModuleInitializeException if an error ocurred while initializing the module.
*/
public void initialize(final SubSystem subSystem) throws ModuleInitializeException
{
try
{
final ClassLoader loader = ObjectUtilities.getClassLoader(getClass());
Class.forName("org.pentaho.reporting.libraries.libsparklines.BarGraphDrawable", false, loader);
}
catch (Exception e)
{
throw new ModuleInitializeException("Unable to load the Sparkline library class.");
}
ElementMetaDataParser.initializeOptionalElementMetaData
("org/pentaho/reporting/engine/classic/extensions/modules/sparklines/meta-elements.xml");
ElementMetaDataParser.initializeOptionalExpressionsMetaData
("org/pentaho/reporting/engine/classic/extensions/modules/sparklines/meta-expressions.xml");
}
}