1 /*

     2  * Copyright 2008 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any 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         String fmClassName = AccessController.doPrivileged(

    72                 new GetPropertyAction("sun.font.fontmanager",

    73                                       DEFAULT_CLASS));

    74 

    75         try {

    76             @SuppressWarnings("unchecked")

    77             ClassLoader cl = (ClassLoader)

    78                 AccessController.doPrivileged(new PrivilegedAction() {

    79                     public Object run() {

    80                         return ClassLoader.getSystemClassLoader();

    81                     }

    82                 });

    83 

    84             @SuppressWarnings("unchecked")

    85             Class fmClass = Class.forName(fmClassName, true, cl);

    86             instance = (FontManager) fmClass.newInstance();

    87 

    88         } catch (ClassNotFoundException ex) {

    89             InternalError err = new InternalError();

    90             err.initCause(ex);

    91             throw err;

    92 

    93         } catch (InstantiationException ex) {

    94             InternalError err = new InternalError();

    95             err.initCause(ex);

    96             throw err;

    97 

    98         } catch (IllegalAccessException ex) {

    99             InternalError err = new InternalError();

   100             err.initCause(ex);

   101             throw err;

   102         }

   103 

   104         return instance;

   105     }

   106 }