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* 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
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package jdk.nashorn.internal.runtime;
import static jdk.nashorn.internal.codegen.Compiler.SCRIPTS_PACKAGE;
import static jdk.nashorn.internal.codegen.Compiler.binaryName;
import static jdk.nashorn.internal.codegen.CompilerConstants.JS_OBJECT_DUAL_FIELD_PREFIX;
import static jdk.nashorn.internal.codegen.CompilerConstants.JS_OBJECT_SINGLE_FIELD_PREFIX;
import java.lang.module.ModuleDescriptor;
import java.lang.module.ModuleDescriptor.Modifier;
import java.security.ProtectionDomain;
import java.util.Set;
import jdk.nashorn.internal.codegen.ObjectClassGenerator;
/**
* Responsible for on the fly construction of structure classes.
*/
final class StructureLoader extends NashornLoader {
private static final String SINGLE_FIELD_PREFIX = binaryName(SCRIPTS_PACKAGE) + '.' + JS_OBJECT_SINGLE_FIELD_PREFIX.symbolName();
private static final String DUAL_FIELD_PREFIX = binaryName(SCRIPTS_PACKAGE) + '.' + JS_OBJECT_DUAL_FIELD_PREFIX.symbolName();
private final Module structuresModule;
/**
* Constructor.
*/
StructureLoader(final ClassLoader parent) {
super(parent);
// new structures module, it's exports, read edges
structuresModule = createModule("jdk.scripting.nashorn.structures");
// specific exports from nashorn to the structures module
NASHORN_MODULE.addExports(SCRIPTS_PKG, structuresModule);
NASHORN_MODULE.addExports(RUNTIME_PKG, structuresModule);
// nashorn has to read fields from classes of the new module
NASHORN_MODULE.addReads(structuresModule);
}
private Module createModule(final String moduleName) {
final ModuleDescriptor descriptor =
ModuleDescriptor.newModule(moduleName, Set.of(Modifier.SYNTHETIC))
.requires(NASHORN_MODULE.getName())
.packages(Set.of(SCRIPTS_PKG))
.build();
final Module mod = Context.createModuleTrusted(descriptor, this);
loadModuleManipulator();
return mod;
}
/**
* Returns true if the class name represents a structure object with dual primitive/object fields.
* @param name a class name
* @return true if a dual field structure class
*/
private static boolean isDualFieldStructure(final String name) {
return name.startsWith(DUAL_FIELD_PREFIX);
}
/**
* Returns true if the class name represents a structure object with single object-only fields.
* @param name a class name
* @return true if a single field structure class
*/
static boolean isSingleFieldStructure(final String name) {
return name.startsWith(SINGLE_FIELD_PREFIX);
}
/**
* Returns true if the class name represents a Nashorn structure object.
* @param name a class name
* @return true if a structure class
*/
static boolean isStructureClass(final String name) {
return isDualFieldStructure(name) || isSingleFieldStructure(name);
}
Module getModule() {
return structuresModule;
}
@Override
protected Class<?> findClass(final String name) throws ClassNotFoundException {
if (isDualFieldStructure(name)) {
return generateClass(name, name.substring(DUAL_FIELD_PREFIX.length()), true);
} else if (isSingleFieldStructure(name)) {
return generateClass(name, name.substring(SINGLE_FIELD_PREFIX.length()), false);
}
return super.findClass(name);
}
/**
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