/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pdfbox.pdmodel.font;
import java.lang.ref.SoftReference;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.fontbox.FontBoxFont;
/**
* An in-memory cache for system fonts. This allows PDFBox to manage caching for a {@link FontProvider}.
* PDFBox is free to purge this cache at will.
*
* @author John Hewson
*/
public final class FontCache
{
private final Map<FontInfo, SoftReference<FontBoxFont>> cache = new ConcurrentHashMap<>();
/**
* Adds the given FontBox font to the cache.
*/
public void addFont(FontInfo info, FontBoxFont font)
{
cache.put(info, new SoftReference<>(font));
}
/**
* Returns the FontBox font associated with the given FontInfo.
*/
public FontBoxFont getFont(FontInfo info)
{
SoftReference<FontBoxFont> reference = cache.get(info);
return reference != null ? reference.get() : null;
}
}