| /* |
| * 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. |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.fop.fonts; |
| |
| import java.io.File; |
| import java.net.URI; |
| |
| import org.apache.fop.apps.FOPException; |
| |
| /** |
| * A factory that provides the font caching manager mechanism. |
| * |
| */ |
| public final class FontCacheManagerFactory { |
| |
| private FontCacheManagerFactory() { |
| } |
| |
| /** |
| * Create the default font caching mechanism. |
| * @return the font cache manager |
| */ |
| public static FontCacheManager createDefault() { |
| return new FontCacheManagerImpl(); |
| } |
| |
| /** |
| * Create a disabled font caching mechanism which by definition does nothing to cache fonts. |
| * @return a completely restricted font cache manager |
| */ |
| public static FontCacheManager createDisabled() { |
| return new DisabledFontCacheManager(); |
| } |
| |
| private static final class FontCacheManagerImpl implements FontCacheManager { |
| |
| /** Provides a font cache file path **/ |
| private File cacheFile; |
| |
| private FontCache fontCache; |
| |
| public FontCache load() { |
| if (fontCache == null) { |
| fontCache = FontCache.loadFrom(getCacheFile(false)); |
| if (fontCache == null) { |
| fontCache = new FontCache(); |
| } |
| } |
| return fontCache; |
| } |
| |
| public void save() throws FOPException { |
| if (fontCache != null && fontCache.hasChanged()) { |
| fontCache.saveTo(getCacheFile(true)); |
| } |
| } |
| |
| public void delete() throws FOPException { |
| if (!getCacheFile(true).delete()) { |
| throw new FOPException("Failed to flush the font cache file '" + cacheFile + "'."); |
| } |
| } |
| |
| private File getCacheFile(boolean forWriting) { |
| if (cacheFile != null) { |
| return cacheFile; |
| } |
| return FontCache.getDefaultCacheFile(forWriting); |
| } |
| |
| public void setCacheFile(URI fontCacheURI) { |
| cacheFile = new File(fontCacheURI); |
| } |
| } |
| |
| private static final class DisabledFontCacheManager implements FontCacheManager { |
| |
| public FontCache load() { |
| return null; |
| } |
| |
| public void save() throws FOPException { |
| // nop |
| } |
| |
| public void delete() throws FOPException { |
| throw new FOPException("Font Cache disabled"); |
| } |
| |
| public void setCacheFile(URI fontCacheURI) { |
| // nop |
| } |
| } |
| } |