/*
 * Copyright (c) 2018, 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.
 *
 * 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.
 */

/*
 * @test
 * @compile ../common/Foo.java
 *          ../common/PreemptingClassLoader.java
 * @run main/othervm Test
 * @run main/othervm -Xint Test
 * @run main/othervm -Xcomp Test
 * @run main/othervm -XX:+TieredCompilation -XX:TieredStopAtLevel=1 Test
 * @run main/othervm -XX:-TieredCompilation Test
 */

public class Test {

    // Check that all names have external formatting ('.' and not '/' in package names).
    // Check for parent of class loader.
    static String expectedErrorMessage1 =
        "loader instance of PreemptingClassLoader (parent: \"app\" " +
        "jdk.internal.loader.ClassLoaders$AppClassLoader) attempted duplicate class definition for test.Foo.";

    // Test that the error message is correct when a loader constraint error is
    // detected during vtable creation.
    //
    // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
    // overrides "J.m()LFoo;".  But, Task's class Foo and super type J's class Foo
    // are different.  So, a LinkageError exception should be thrown because the
    // loader constraint check will fail.
    public static void test1() throws Exception {
        String[] classNames = {"test.Foo"};
        ClassLoader l = new PreemptingClassLoader(null, classNames, false);
        l.loadClass("test.Foo");
        try {
            l.loadClass("test.Foo").newInstance();
            throw new RuntimeException("Expected LinkageError exception not thrown");
        } catch (LinkageError e) {
            String errorMsg = e.getMessage();
            if (!errorMsg.equals(expectedErrorMessage1)) {
                System.out.println("Expected: " + expectedErrorMessage1 + "\n" +
                                   "but got:  " + errorMsg);
                throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
            }
            System.out.println("Passed with message: " + errorMsg);
        }
    }

    // Check that all names have external formatting ('.' and not '/' in package names).
    // Check for name and parent of class loader.
    static String expectedErrorMessage2 =
        "loader \"DuplicateLE_Test_Loader\" (instance of PreemptingClassLoader, parent: \"app\" " +
        "jdk.internal.loader.ClassLoaders$AppClassLoader) attempted duplicate class definition for test.Foo.";

    // Same as test1, but ClassLoader has a name.
    public static void test2() throws Exception {
        String[] classNames = {"test.Foo"};
        ClassLoader l = new PreemptingClassLoader("DuplicateLE_Test_Loader", classNames, false);
        l.loadClass("test.Foo");
        try {
            l.loadClass("test.Foo");
            throw new RuntimeException("Expected LinkageError exception not thrown");
        } catch (LinkageError e) {
            String errorMsg = e.getMessage();
            if (!errorMsg.equals(expectedErrorMessage2)) {
                System.out.println("Expected: " + expectedErrorMessage2 + "\n" +
                                   "but got:  " + errorMsg);
                throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
            }
            System.out.println("Passed with message: " + errorMsg);
        }
    }
    
    public static void main(String args[]) throws Exception {
        test1();
        test2();
    }
}