/*
* 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) 2008 - 2009 Pentaho Corporation, . All rights reserved.
*/
package org.pentaho.reporting.engine.classic.extensions.datasources.pmd.types;
import org.pentaho.metadata.model.concept.types.ColumnWidth;
import org.pentaho.metadata.model.concept.types.ColumnWidth.WidthType;
import org.pentaho.reporting.engine.classic.core.layout.output.OutputProcessorFeature;
import org.pentaho.reporting.engine.classic.core.layout.output.OutputProcessorMetaData;
import org.pentaho.reporting.engine.classic.core.util.beans.BeanException;
import org.pentaho.reporting.engine.classic.core.util.beans.ConverterRegistry;
import org.pentaho.reporting.engine.classic.core.wizard.ConceptQueryMapper;
import org.pentaho.reporting.engine.classic.core.wizard.DataAttributeContext;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class ColumnWidthConceptMapper implements ConceptQueryMapper
{
public ColumnWidthConceptMapper()
{
}
/**
* @param value
* @param type
* @return
*/
public Object getValue(final Object value, final Class type, final DataAttributeContext context)
{
if (value == null)
{
return null;
}
if (value instanceof ColumnWidth == false)
{
return null;
}
if (type == null || ColumnWidth.class.equals(type))
{
return value;
}
final ColumnWidth width = (ColumnWidth) value;
final float widthValue = (float)width.getWidth();
final WidthType widthType = width.getType();
final float rawWidth;
if (widthType == WidthType.CM)
{
rawWidth = (float)widthValue * (72.0f * 100 / 254.0f);
}
else if (widthType == WidthType.INCHES)
{
rawWidth = 72 * widthValue;
}
else if (widthType == WidthType.PERCENT)
{
rawWidth = -Math.max (0, widthValue);
}
else if (widthType == WidthType.PIXELS)
{
final OutputProcessorMetaData data = context.getOutputProcessorMetaData();
final double resolution = data.getNumericFeatureValue(OutputProcessorFeature.DEVICE_RESOLUTION);
final double deviceScaleFactor = (72.0 / resolution);
rawWidth = (float) (widthValue * deviceScaleFactor);
}
else // if (widthType == ColumnWidth.POINTS
{
rawWidth = Math.max (0, widthValue);
}
final String valueAsString = String.valueOf(rawWidth);
if (String.class.isAssignableFrom(type))
{
return valueAsString;
}
try
{
return ConverterRegistry.toPropertyValue(valueAsString, type);
}
catch (BeanException e)
{
// ignore ..
}
return null;
}
}