HasNamedModule.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
 *
 * 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.
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package pkg;

import java.lang.invoke.MethodType;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import static java.lang.invoke.MethodHandles.Lookup.ClassOption.*;

// This class is used by test HiddenGetModule.java.
public class HasNamedModule {

    public static void compareModules(byte[] klassbuf) throws Throwable {
        String moduleName = HasNamedModule.class.getModule().toString();
        System.out.println("HasNamedModule module: " + moduleName);
        Lookup lookup = MethodHandles.lookup();
        Class<?> cl = lookup.defineHiddenClass(klassbuf, false, NESTMATE).lookupClass();
        if (cl.getModule() != HasNamedModule.class.getModule()) {
            System.out.println("HasNamedModule: " + moduleName +
                               ", hidden class module: " + cl.getModule());
            throw new RuntimeException("hidden class and lookup class have different modules");
        }
        if (!moduleName.contains("HiddenModule")) {
            throw new RuntimeException("wrong module name: " + moduleName);
        }
    }
}