1 /* 2 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.font; 27 28 import java.awt.AWTError; 29 import java.awt.Font; 30 import java.awt.GraphicsEnvironment; 31 import java.awt.Toolkit; 32 import java.security.AccessController; 33 import java.security.PrivilegedAction; 34 35 import sun.security.action.GetPropertyAction; 36 37 38 /** 39 * Factory class used to retrieve a valid FontManager instance for the current 40 * platform. 41 * 42 * A default implementation is given for Linux, Solaris and Windows. 43 * You can alter the behaviour of the {@link #getInstance()} method by setting 44 * the {@code sun.font.fontmanager} property. For example: 45 * {@code sun.font.fontmanager=sun.awt.X11FontManager} 46 */ 47 public final class FontManagerFactory { 48 49 /** Our singleton instance. */ 50 private static FontManager instance = null; 51 52 private static final String DEFAULT_CLASS; 53 static { 54 if (FontUtilities.isWindows) 55 DEFAULT_CLASS = "sun.awt.Win32FontManager"; 56 else 57 DEFAULT_CLASS = "sun.awt.X11FontManager"; 58 } 59 60 /** 61 * Get a valid FontManager implementation for the current platform. 62 * 63 * @return a valid FontManager instance for the current platform 64 */ 65 public static synchronized FontManager getInstance() { 66 67 if (instance != null) { 68 return instance; 69 } 70 71 AccessController.doPrivileged(new PrivilegedAction() { 72 73 public Object run() { 74 try { 75 String fmClassName = 76 System.getProperty("sun.font.fontmanager", 77 DEFAULT_CLASS); 78 ClassLoader cl = ClassLoader.getSystemClassLoader(); 79 Class fmClass = Class.forName(fmClassName, true, cl); 80 instance = (FontManager) fmClass.newInstance(); 81 } catch (ClassNotFoundException ex) { 82 InternalError err = new InternalError(); 83 err.initCause(ex); 84 throw err; 85 86 } catch (InstantiationException ex) { 87 InternalError err = new InternalError(); 88 err.initCause(ex); 89 throw err; 90 91 } catch (IllegalAccessException ex) { 92 InternalError err = new InternalError(); 93 err.initCause(ex); 94 throw err; 95 } 96 return null; 97 } 98 }); 99 100 return instance; 101 } 102 }