jdk/src/java.base/share/classes/jdk/internal/jrtfs/SystemImages.java
changeset 37365 9cc4eb4d7491
parent 37364 80be215c8c51
child 37366 2a9763cab068
--- a/jdk/src/java.base/share/classes/jdk/internal/jrtfs/SystemImages.java	Fri Apr 15 10:14:57 2016 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,106 +0,0 @@
-/*
- * Copyright (c) 2014, Oracle and/or its affiliates. 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.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-package jdk.internal.jrtfs;
-
-import java.net.URISyntaxException;
-import java.net.URL;
-import java.nio.file.Files;
-import java.nio.file.FileSystem;
-import java.nio.file.FileSystems;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.security.AccessController;
-import java.security.CodeSource;
-import java.security.PrivilegedAction;
-
-/**
- * @implNote This class needs to maintain JDK 8 source compatibility.
- *
- * It is used internally in the JDK to implement jimage/jrtfs access,
- * but also compiled and delivered as part of the jrtfs.jar to support access
- * to the jimage file provided by the shipped JDK by tools running on JDK 8.
- */
-final class SystemImages {
-    private SystemImages() {}
-
-
-    static final String RUNTIME_HOME;
-    // "modules" jimage file Path
-    private static final Path moduleImageFile;
-    // "modules" jimage exists or not?
-    private static final boolean modulesImageExists;
-    // <JAVA_HOME>/modules directory Path
-    private static final Path explodedModulesDir;
-
-    static {
-        PrivilegedAction<String> pa = SystemImages::findHome;
-        RUNTIME_HOME = AccessController.doPrivileged(pa);
-
-        FileSystem fs = FileSystems.getDefault();
-        moduleImageFile = fs.getPath(RUNTIME_HOME, "lib", "modules");
-        explodedModulesDir = fs.getPath(RUNTIME_HOME, "modules");
-
-        modulesImageExists = AccessController.doPrivileged(
-            new PrivilegedAction<Boolean>() {
-                @Override
-                public Boolean run() {
-                    return Files.isRegularFile(moduleImageFile);
-                }
-            });
-    }
-
-    static boolean hasModulesImage() {
-        return modulesImageExists;
-    }
-
-    static Path moduleImageFile() {
-        return moduleImageFile;
-    }
-
-    static Path explodedModulesDir() {
-        return explodedModulesDir;
-    }
-
-    /**
-     * Returns the appropriate JDK home for this usage of the FileSystemProvider.
-     * When the CodeSource is null (null loader) then jrt:/ is the current runtime,
-     * otherwise the JDK home is located relative to jrt-fs.jar.
-     */
-    private static String findHome() {
-        CodeSource cs = SystemImages.class.getProtectionDomain().getCodeSource();
-        if (cs == null)
-            return System.getProperty("java.home");
-
-        // assume loaded from $TARGETJDK/jrt-fs.jar
-        URL url = cs.getLocation();
-        if (!url.getProtocol().equalsIgnoreCase("file"))
-            throw new RuntimeException(url + " loaded in unexpected way");
-        try {
-            return Paths.get(url.toURI()).getParent().toString();
-        } catch (URISyntaxException e) {
-            throw new InternalError(e);
-        }
-    }
-}