/**
* ===========================================
* LibFonts : a free Java font reading library
* ===========================================
*
* Project Info: http://reporting.pentaho.org/libfonts/
*
* (C) Copyright 2006-2008, by Pentaho Corporation and Contributors.
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* TrueTypeFontMetricsFactory.java
* ------------
*/
package org.pentaho.reporting.libraries.fonts.truetype;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.reporting.libraries.fonts.io.FileFontDataInputSource;
import org.pentaho.reporting.libraries.fonts.io.FontDataInputSource;
import org.pentaho.reporting.libraries.fonts.registry.FontContext;
import org.pentaho.reporting.libraries.fonts.registry.FontIdentifier;
import org.pentaho.reporting.libraries.fonts.registry.FontMetrics;
import org.pentaho.reporting.libraries.fonts.registry.FontMetricsFactory;
import org.pentaho.reporting.libraries.fonts.registry.FontType;
/**
* This class is still experimental. At a later time, this class should be refactored to work without file references.
*
* @author Thomas Morgner
*/
public class TrueTypeFontMetricsFactory implements FontMetricsFactory
{
private static Log logger = LogFactory.getLog(TrueTypeFontMetricsFactory.class);
private HashMap fontRecords;
public TrueTypeFontMetricsFactory()
{
this.fontRecords = new HashMap();
}
public FontMetrics createMetrics(final FontIdentifier record,
final FontContext context)
{
if (FontType.OPENTYPE.equals(record.getFontType()) == false)
{
throw new IllegalArgumentException
("This identifier does not belong to the OpenType-font system.");
}
final TrueTypeFontIdentifier ttfId = (TrueTypeFontIdentifier) record;
final ScalableTrueTypeFontMetrics fromCache =
(ScalableTrueTypeFontMetrics) fontRecords.get(ttfId);
if (fromCache != null)
{
return new TrueTypeFontMetrics(fromCache, context.getFontSize());
}
try
{
final String fontSource = ttfId.getFontSource();
final FontDataInputSource fdis =
new FileFontDataInputSource(new File(fontSource));
final TrueTypeFont font = new TrueTypeFont(fdis);
final ScalableTrueTypeFontMetrics fontMetrics =
new ScalableTrueTypeFontMetrics(font);
this.fontRecords.put(ttfId, fontMetrics);
return new TrueTypeFontMetrics(fontMetrics, context.getFontSize());
}
catch (IOException e)
{
logger.warn("Unable to read the font.", e);
// todo: We should throw a better exception instead, shouldnt we?
throw new IllegalStateException();
}
}
}