net.sf.jasperreports.engine.fonts.AwtFontManager Maven / Gradle / Ivy
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 JasperReports. If not, see .
*/
package net.sf.jasperreports.engine.fonts;
import java.awt.Font;
import java.awt.FontFormatException;
import java.io.IOException;
import java.io.InputStream;
import java.lang.ref.ReferenceQueue;
import java.lang.ref.WeakReference;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperReportsContext;
import net.sf.jasperreports.repo.RepositoryUtil;
/**
* @author Lucian Chirita ([email protected])
*/
public class AwtFontManager
{
private static final Log log = LogFactory.getLog(AwtFontManager.class);
private static final AwtFontManager INSTANCE = new AwtFontManager();
public static AwtFontManager instance()
{
return INSTANCE;
}
private Map fontFileReferences;
private ReferenceQueue fontFilesQueue;
public AwtFontManager()
{
fontFileReferences = new ConcurrentHashMap<>();
fontFilesQueue = new ReferenceQueue<>();
}
public Font getAwtFont(JasperReportsContext jasperReportsContext, String ttfLocation)
{
purgeFontFiles();
InputStream is = null;
Path fontFile;
try
{
is = RepositoryUtil.getInstance(jasperReportsContext).getInputStreamFromLocation(ttfLocation);
fontFile = Files.createTempFile("jr-font", ".ttf");
fontFile.toFile().deleteOnExit();
if (log.isDebugEnabled())
{
log.debug("created font file " + fontFile + " for " + ttfLocation);
}
Files.copy(is, fontFile, StandardCopyOption.REPLACE_EXISTING);
Font font = Font.createFont(Font.TRUETYPE_FONT, fontFile.toFile());
FontFileReference fontFileReference = new FontFileReference(font, fontFilesQueue, fontFile);
fontFileReferences.put(fontFileReference, Boolean.TRUE);
return font;
}
catch (JRException | IOException | FontFormatException e)
{
throw new InvalidFontException(ttfLocation, e);
}
finally
{
try
{
if (is != null)
{
is.close();
}
}
catch (IOException e)
{
}
}
}
public void purgeFontFiles()
{
FontFileReference fontFileRef;
while ((fontFileRef = (FontFileReference) fontFilesQueue.poll()) != null)
{
fontFileReferences.remove(fontFileRef);
try
{
Files.deleteIfExists(fontFileRef.fontFile);
}
catch (IOException e)
{
if (log.isDebugEnabled())
{
log.debug("Failed to delete font file " + fontFileRef.fontFile);
}
}
}
}
private static class FontFileReference extends WeakReference
{
Path fontFile;
FontFileReference(Font font, ReferenceQueue queue, Path fontFile)
{
super(font, queue);
this.fontFile = fontFile;
}
}
}