org.apache.pdfbox.pdmodel.font.FontCache Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of pdfbox Show documentation

The Apache PDFBox library is an open source Java tool for working with PDF documents.

There is a newer version: 3.0.2

/*
 * 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> 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 reference = cache.get(info);
        return reference != null ? reference.get() : null;
    }
}