| /* |
| * Copyright (c) 2010, 2013, 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.nashorn.internal.runtime; |
| |
| import java.lang.module.ModuleDescriptor; |
| import java.lang.reflect.Module; |
| import java.security.CodeSource; |
| import java.util.Objects; |
| |
| /** |
| * Responsible for loading script generated classes. |
| * |
| */ |
| final class ScriptLoader extends NashornLoader { |
| private static final String NASHORN_PKG_PREFIX = "jdk.nashorn.internal."; |
| |
| private volatile boolean structureAccessAdded; |
| private final Context context; |
| private final Module scriptModule; |
| |
| /*package-private*/ Context getContext() { |
| return context; |
| } |
| |
| /** |
| * Constructor. |
| */ |
| ScriptLoader(final Context context) { |
| super(context.getStructLoader()); |
| this.context = context; |
| |
| // new scripts module, it's specific exports and read-edges |
| scriptModule = createModule("jdk.scripting.nashorn.scripts"); |
| |
| // specific exports from nashorn to new scripts module |
| NASHORN_MODULE.addExports(OBJECTS_PKG, scriptModule); |
| NASHORN_MODULE.addExports(RUNTIME_PKG, scriptModule); |
| NASHORN_MODULE.addExports(RUNTIME_ARRAYS_PKG, scriptModule); |
| NASHORN_MODULE.addExports(RUNTIME_LINKER_PKG, scriptModule); |
| NASHORN_MODULE.addExports(SCRIPTS_PKG, scriptModule); |
| |
| // nashorn needs to read scripts module methods,fields |
| NASHORN_MODULE.addReads(scriptModule); |
| } |
| |
| private Module createModule(final String moduleName) { |
| final Module structMod = context.getStructLoader().getModule(); |
| final ModuleDescriptor.Builder builder = |
| ModuleDescriptor.module(moduleName) |
| .requires("java.base") |
| .requires("java.logging") |
| .requires(NASHORN_MODULE.getName()) |
| .requires(structMod.getName()) |
| .contains(SCRIPTS_PKG); |
| |
| if (Context.javaSqlFound) { |
| builder.requires("java.sql"); |
| } |
| |
| if (Context.javaSqlRowsetFound) { |
| builder.requires("java.sql.rowset"); |
| } |
| |
| final ModuleDescriptor descriptor = builder.build(); |
| |
| final Module mod = Context.createModuleTrusted(structMod.getLayer(), descriptor, this); |
| loadModuleManipulator(); |
| return mod; |
| } |
| |
| @Override |
| protected Class<?> loadClass(final String name, final boolean resolve) throws ClassNotFoundException { |
| checkPackageAccess(name); |
| final Class<?> cl = super.loadClass(name, resolve); |
| if (!structureAccessAdded) { |
| final StructureLoader structLoader = context.getStructLoader(); |
| if (cl.getClassLoader() == structLoader) { |
| structureAccessAdded = true; |
| structLoader.addModuleExport(scriptModule); |
| } |
| } |
| return cl; |
| } |
| |
| @Override |
| protected Class<?> findClass(final String name) throws ClassNotFoundException { |
| final ClassLoader appLoader = context.getAppLoader(); |
| |
| /* |
| * If the appLoader is null, don't bother side-delegating to it! |
| * Bootloader has been already attempted via parent loader |
| * delegation from the "loadClass" method. |
| * |
| * Also, make sure that we don't delegate to the app loader |
| * for nashorn's own classes or nashorn generated classes! |
| */ |
| if (appLoader == null || name.startsWith(NASHORN_PKG_PREFIX)) { |
| throw new ClassNotFoundException(name); |
| } |
| |
| /* |
| * This split-delegation is used so that caller loader |
| * based resolutions of classes would work. For example, |
| * java.sql.DriverManager uses caller's class loader to |
| * get Driver instances. Without this split-delegation |
| * a script class evaluating DriverManager.getDrivers() |
| * will not get back any JDBC driver! |
| */ |
| return appLoader.loadClass(name); |
| } |
| |
| // package-private and private stuff below this point |
| |
| /** |
| * Install a class for use by the Nashorn runtime |
| * |
| * @param name Binary name of class. |
| * @param data Class data bytes. |
| * @param cs CodeSource code source of the class bytes. |
| * |
| * @return Installed class. |
| */ |
| synchronized Class<?> installClass(final String name, final byte[] data, final CodeSource cs) { |
| return defineClass(name, data, 0, data.length, Objects.requireNonNull(cs)); |
| } |
| } |