73             @Override
 74             public Node findNode(String path) throws IOException {
 75                 return image.findNode(path);
 76             }
 77             @Override
 78             public byte[] getResource(Node node) throws IOException {
 79                 return image.getResource(node);
 80             }
 81             @Override
 82             public void close() throws IOException {
 83                 image.close();
 84             }
 85         };
 86     }
 87 
 88     /** Internal factory method for testing only, use {@link SystemImage#open(PreviewMode)}. */
 89     public static SystemImage fromDirectory(Path modulesDir, PreviewMode mode) throws IOException {
 90         if (!Files.isDirectory(modulesDir)) {
 91             throw new FileSystemNotFoundException(modulesDir.toString());
 92         }
 93         return new ExplodedImage(modulesDir);
 94     }
 95 
 96     private static final String RUNTIME_HOME;
 97     // "modules" jimage file Path
 98     private static final Path moduleImageFile;
 99     // "modules" jimage exists or not?
100     private static final boolean modulesImageExists;
101     // <JAVA_HOME>/modules directory Path
102     private static final Path explodedModulesDir;
103 
104     static {
105         PrivilegedAction<String> pa = SystemImage::findHome;
106         RUNTIME_HOME = AccessController.doPrivileged(pa);
107 
108         FileSystem fs = FileSystems.getDefault();
109         moduleImageFile = fs.getPath(RUNTIME_HOME, "lib", "modules");
110         explodedModulesDir = fs.getPath(RUNTIME_HOME, "modules");
111 
112         modulesImageExists = AccessController.doPrivileged(
113             new PrivilegedAction<Boolean>() {

 73             @Override
 74             public Node findNode(String path) throws IOException {
 75                 return image.findNode(path);
 76             }
 77             @Override
 78             public byte[] getResource(Node node) throws IOException {
 79                 return image.getResource(node);
 80             }
 81             @Override
 82             public void close() throws IOException {
 83                 image.close();
 84             }
 85         };
 86     }
 87 
 88     /** Internal factory method for testing only, use {@link SystemImage#open(PreviewMode)}. */
 89     public static SystemImage fromDirectory(Path modulesDir, PreviewMode mode) throws IOException {
 90         if (!Files.isDirectory(modulesDir)) {
 91             throw new FileSystemNotFoundException(modulesDir.toString());
 92         }
 93         return new ExplodedImage(modulesDir, mode.isPreviewModeEnabled());
 94     }
 95 
 96     private static final String RUNTIME_HOME;
 97     // "modules" jimage file Path
 98     private static final Path moduleImageFile;
 99     // "modules" jimage exists or not?
100     private static final boolean modulesImageExists;
101     // <JAVA_HOME>/modules directory Path
102     private static final Path explodedModulesDir;
103 
104     static {
105         PrivilegedAction<String> pa = SystemImage::findHome;
106         RUNTIME_HOME = AccessController.doPrivileged(pa);
107 
108         FileSystem fs = FileSystems.getDefault();
109         moduleImageFile = fs.getPath(RUNTIME_HOME, "lib", "modules");
110         explodedModulesDir = fs.getPath(RUNTIME_HOME, "modules");
111 
112         modulesImageExists = AccessController.doPrivileged(
113             new PrivilegedAction<Boolean>() {