1 /*
   2  * Copyright (c) 2013, 2014, 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 com.sun.glass.ui.monocle;
  27 
  28 import com.sun.glass.ui.monocle.linux.LinuxSystem;
  29 
  30 import java.security.AccessController;
  31 import java.security.PrivilegedAction;
  32 import java.util.Locale;
  33 
  34 public abstract class NativePlatformFactory {
  35     private static String platformName="";
  36     private static String factoryClassName="";
  37     private static long nativeDisplayType = -1L;
  38 
  39     protected abstract boolean matches();
  40 
  41     protected abstract NativePlatform createNativePlatform();
  42 
  43     private static NativePlatform platform;
  44     private static boolean initialized = false;
  45 
  46     private static void determineNativePlatform(){
  47         String platformFactoryProperty = AccessController.doPrivileged(new PrivilegedAction<String>() {
  48                 @Override
  49                 public String run() {
  50                     return System.getProperty("monocle.platform", "MX6,OMAP,Linux,Headless");
  51                 }
  52         } );
  53 
  54         String[] platformFactories = platformFactoryProperty.split(",");
  55         for (int i = 0; i < platformFactories.length; i++) {
  56             String factoryName = platformFactories[i].trim();
  57             if (factoryName.contains(".")) {
  58                 factoryClassName = factoryName;
  59                 platformName = factoryClassName.substring(factoryClassName.lastIndexOf(".", 0));
  60             } else {
  61                 platformName = factoryName.toLowerCase(Locale.ROOT);
  62                 factoryClassName = "com.sun.glass.ui.monocle." + platformName + "." + factoryName + "PlatformFactory";
  63             }
  64             try {
  65                 NativePlatformFactory npf = (NativePlatformFactory) Class.forName(factoryClassName).newInstance();
  66                 if (npf.matches()) {
  67                     initialized = true;
  68                     return;
  69                 }
  70             } catch (Exception e) {
  71                 e.printStackTrace();
  72             }
  73         }
  74         initialized = true;
  75     }
  76 
  77     public static synchronized String getNativePlatformName() {
  78         if (!initialized) {
  79             determineNativePlatform();
  80         }
  81         return platformName;
  82     }
  83 
  84     public static synchronized NativePlatform getNativePlatform() {
  85         if (!initialized) {
  86             determineNativePlatform();
  87         }
  88         if (platform == null) {
  89             try {
  90                 NativePlatformFactory npf = (NativePlatformFactory) Class.forName(factoryClassName).newInstance();
  91                 if (npf.matches()) {
  92                     platform = npf.createNativePlatform();
  93                     return platform;
  94                 }
  95             } catch (Exception e) {
  96                 e.printStackTrace();
  97             }
  98 
  99             throw new UnsupportedOperationException("Cannot load a native platform: '" + platformName + "'");
 100         }
 101         return platform;
 102     }
 103 
 104 }