/*
* 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 java.util.Locale;
import org.pentaho.reporting.engine.classic.core.AttributeNames;
import org.pentaho.reporting.engine.classic.core.Element;
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.libsparklines.PieGraphDrawable;
/**
* This class is the Element type implementation of Sparkline pie graph.<br/> This Element type allows the configuration
* of slices color, slices repartition, clockwise (or counter) drawing and the starting angle in degrees (0 the default
* is 12 o'clock).
*
* @author Cedric Pronzato
*/
public class PieSparklineType extends ContentType
{
private transient ElementMetaData elementType;
public PieSparklineType()
{
}
public ElementMetaData getMetaData()
{
if (elementType == null)
{
elementType = ElementTypeRegistry.getInstance().getElementType("pie-sparkline");
}
return elementType;
}
/**
* Returns the current value for the data source.
*
* @param runtime the expression runtime that is used to evaluate formulas and expressions when computing the value of
* this filter.
* @param element the element for which the data is computed.
* @return the value.
*/
public Object getValue(final ExpressionRuntime runtime, final Element element)
{
final Object retval = ElementTypeUtils.queryFieldOrValue(runtime, element);
final Number numbers = (Number) retval;
if (numbers == null)
{
final Object nullValue = element.getAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.NULL_VALUE);
return filter(runtime, element, nullValue);
}
final int startAngle = ElementTypeUtils.getIntAttribute
(element, SparklineAttributeNames.NAMESPACE, SparklineAttributeNames.START_ANGLE, 0);
final Number lowSlice = ElementTypeUtils.getNumberAttribute(element, SparklineAttributeNames.NAMESPACE,
SparklineAttributeNames.LOW_SLICE, new Double(0.30));
final Number mediumSlice = ElementTypeUtils.getNumberAttribute(element, SparklineAttributeNames.NAMESPACE,
SparklineAttributeNames.MEDIUM_SLICE, new Double(0.70));
final Number highSlice = ElementTypeUtils.getNumberAttribute(element, SparklineAttributeNames.NAMESPACE,
SparklineAttributeNames.HIGH_SLICE, new Double(1));
final boolean clockwise = ElementTypeUtils.getBooleanAttribute(element, SparklineAttributeNames.NAMESPACE,
SparklineAttributeNames.COUNTER_CLOCKWISE, false);
final PieGraphDrawable drawable = new PieGraphDrawable();
drawable.setValue(numbers);
drawable.setStartAngle(startAngle);
drawable.setLowSlice(lowSlice);
drawable.setMediumSlice(mediumSlice);
drawable.setHighSlice(highSlice);
drawable.setCounterClockWise(clockwise);
return new PieSparklinesWrapper(drawable);
}
public Object getDesignValue(final ExpressionRuntime runtime, final Element element)
{
Object retval = ElementTypeUtils.queryStaticValue(element);
if (retval instanceof Number == false)
{
retval = new Double(0.75);
}
final Number numbers = (Number) retval;
final int startAngle = ElementTypeUtils.getIntAttribute
(element, SparklineAttributeNames.NAMESPACE, SparklineAttributeNames.START_ANGLE, 0);
final Number lowSlice = ElementTypeUtils.getNumberAttribute(element, SparklineAttributeNames.NAMESPACE,
SparklineAttributeNames.LOW_SLICE, new Double(0.30));
final Number mediumSlice = ElementTypeUtils.getNumberAttribute(element, SparklineAttributeNames.NAMESPACE,
SparklineAttributeNames.MEDIUM_SLICE, new Double(0.70));
final Number highSlice = ElementTypeUtils.getNumberAttribute(element, SparklineAttributeNames.NAMESPACE,
SparklineAttributeNames.HIGH_SLICE, new Double(1));
final boolean clockwise = ElementTypeUtils.getBooleanAttribute(element, SparklineAttributeNames.NAMESPACE,
SparklineAttributeNames.COUNTER_CLOCKWISE, false);
final PieGraphDrawable drawable = new PieGraphDrawable();
drawable.setValue(numbers);
drawable.setStartAngle(startAngle);
drawable.setLowSlice(lowSlice);
drawable.setMediumSlice(mediumSlice);
drawable.setHighSlice(highSlice);
drawable.setCounterClockWise(clockwise);
return new PieSparklinesWrapper(drawable);
}
public void configureDesignTimeDefaults(final Element element, final Locale locale)
{
}
/**
* Clones this <code>DataSource</code>.
*
* @return the clone.
* @throws CloneNotSupportedException this should never happen.
*/
public Object clone() throws CloneNotSupportedException
{
return super.clone();
}
}