jdk/src/share/classes/sun/font/FontManagerFactory.java
changeset 3929 de1a48b7aa41
child 4824 791405fa20ff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/font/FontManagerFactory.java	Fri Aug 07 19:36:28 2009 +0200
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.font;
+
+import java.awt.AWTError;
+import java.awt.Font;
+import java.awt.GraphicsEnvironment;
+import java.awt.Toolkit;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+import sun.security.action.GetPropertyAction;
+
+
+/**
+ * Factory class used to retrieve a valid FontManager instance for the current
+ * platform.
+ *
+ * A default implementation is given for Linux, Solaris and Windows.
+ * You can alter the behaviour of the {@link #getInstance()} method by setting
+ * the {@code sun.font.fontmanager} property. For example:
+ * {@code sun.font.fontmanager=sun.awt.X11FontManager}
+ */
+public final class FontManagerFactory {
+
+    /** Our singleton instance. */
+    private static FontManager instance = null;
+
+    private static final String DEFAULT_CLASS;
+    static {
+        if (FontUtilities.isWindows)
+            DEFAULT_CLASS = "sun.awt.Win32FontManager";
+        else
+            DEFAULT_CLASS = "sun.awt.X11FontManager";
+    }
+
+    /**
+     * Get a valid FontManager implementation for the current platform.
+     *
+     * @return a valid FontManager instance for the current platform
+     */
+    public static synchronized FontManager getInstance() {
+
+        if (instance != null) {
+            return instance;
+        }
+
+        String fmClassName = AccessController.doPrivileged(
+                new GetPropertyAction("sun.font.fontmanager",
+                                      DEFAULT_CLASS));
+
+        try {
+            @SuppressWarnings("unchecked")
+            ClassLoader cl = (ClassLoader)
+                AccessController.doPrivileged(new PrivilegedAction() {
+                    public Object run() {
+                        return ClassLoader.getSystemClassLoader();
+                    }
+                });
+
+            @SuppressWarnings("unchecked")
+            Class fmClass = Class.forName(fmClassName, true, cl);
+            instance = (FontManager) fmClass.newInstance();
+
+        } catch (ClassNotFoundException ex) {
+            InternalError err = new InternalError();
+            err.initCause(ex);
+            throw err;
+
+        } catch (InstantiationException ex) {
+            InternalError err = new InternalError();
+            err.initCause(ex);
+            throw err;
+
+        } catch (IllegalAccessException ex) {
+            InternalError err = new InternalError();
+            err.initCause(ex);
+            throw err;
+        }
+
+        return instance;
+    }
+}