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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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk.nashorn.internal.runtime;
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 final Context context;
/*package-private*/ Context getContext() {
return context;
}
/**
* Constructor.
*/
ScriptLoader(final Context context) {
super(context.getStructLoader());
this.context = context;
}
@Override
protected Class<?> loadClass(final String name, final boolean resolve) throws ClassNotFoundException {
checkPackageAccess(name);
return super.loadClass(name, resolve);
}
@Override
protected Class<?> findClass(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));
}
}
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