/*

 * 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

 * @modules java.base/jdk.internal.misc

 * @library /test/lib ..

 * @compile p2/c2.java

 * @compile p4/c4.java

 * @build sun.hotspot.WhiteBox

 * @compile/module=java.base java/lang/reflect/ModuleHelper.java

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI CCE_module_msg

 */

import java.io.*;

import java.lang.reflect.Module;

import java.net.URL;

import java.net.URLClassLoader;

import java.nio.file.Path;

import java.nio.file.Paths;

import static jdk.test.lib.Asserts.*;

// Test that the message in a runtime ClassCastException contains module info.

public class CCE_module_msg {

    private static final Path CLASSES_DIR = Paths.get("classes");

    public static void main(String[] args) throws Throwable {

        // Should not display version

        invalidObjectToDerived();

        // Should display version

        invalidClassToString();

        // Should display customer class loader

        invalidClassToStringCustomLoader();

    }

    public static void invalidObjectToDerived() {

        java.lang.Object instance = new java.lang.Object();

        int left = 23;

        int right = 42;

        try {

            for (int i = 0; i < 1; i += 1) {

                left = ((Derived) instance).method(left, right);

            }

            throw new RuntimeException("ClassCastException wasn't thrown, test failed.");

        } catch (ClassCastException cce) {

            System.out.println(cce.getMessage());

            if (!cce.getMessage().contains("java.base/java.lang.Object cannot be cast to Derived")) {

                throw new RuntimeException("Wrong message: " + cce.getMessage());

            }

        }

    }

    public static void invalidClassToString() throws Throwable {

        // Get the java.lang.reflect.Module object for module java.base.

        Class jlObject = Class.forName("java.lang.Object");

        Object jlObject_jlrM = jlObject.getModule();

        assertNotNull(jlObject_jlrM, "jlrModule object of java.lang.Object should not be null");

        // Get the class loader for CCE_module_msg and assume it's also used to

        // load classes p1.c1 and p2.c2.

        ClassLoader this_cldr = CCE_module_msg.class.getClassLoader();

        // Define a module for p2.

        try {

            Object p2Obj = new p2.c2();

            System.out.println((String)p2Obj);

            throw new RuntimeException("ClassCastException wasn't thrown, test failed.");

        } catch (ClassCastException cce) {

            String exception = cce.getMessage();

            System.out.println(exception);

                  exception.contains("/p2.c2 cannot be cast to java.base/java.lang.String"))) {

                throw new RuntimeException("Wrong message: " + exception);

            }

        }

    }

    public static void invalidClassToStringCustomLoader() throws Throwable {

        // Get the java.lang.reflect.Module object for module java.base.

        Class jlObject = Class.forName("java.lang.Object");

        Object jlObject_jlrM = jlObject.getModule();

        assertNotNull(jlObject_jlrM, "jlrModule object of java.lang.Object should not be null");

        // Create a customer class loader to load class p4/c4.

        URL[] urls = new URL[] { CLASSES_DIR.toUri().toURL() };

        ClassLoader parent = ClassLoader.getSystemClassLoader();

        MyURLClassLoader myCldr = new MyURLClassLoader("MyClassLoader", urls, parent);

        try {

            // Class p4.c4 should be defined to the unnamed module of myCldr

            Class p4_c4_class = myCldr.loadClass("p4.c4");

            Object c4Obj = p4_c4_class.newInstance();

            System.out.println((String)c4Obj);

            throw new RuntimeException("ClassCastException wasn't thrown, test failed.");

        } catch (ClassCastException cce) {

            String exception = cce.getMessage();

            System.out.println(exception);

            if (!exception.contains("MyClassLoader//p4.c4 cannot be cast to java.base/java.lang.String")) {

                throw new RuntimeException("Wrong message: " + exception);

            }

        }

    }

}

class Derived extends java.lang.Object {

    public int method(int left, int right) {

        return right;

    }

}

class MyURLClassLoader extends URLClassLoader {

    public MyURLClassLoader(String name,

                          URL[] urls,

                          ClassLoader parent) {

        super(name, urls, parent);

    }

    public Class loadClass(String name) throws ClassNotFoundException {

        if (!name.equals("p4.c4")) {

            return super.loadClass(name);

        }

        byte[] data = getClassData(name);

        return defineClass(name, data, 0, data.length);

    }

    byte[] getClassData(String name) {

        try {

           String TempName = name.replaceAll("\\.", "/");

           String currentDir = System.getProperty("test.classes");

           String filename = currentDir + File.separator + TempName + ".class";

           FileInputStream fis = new FileInputStream(filename);

           byte[] b = new byte[5000];

           int cnt = fis.read(b, 0, 5000);

           byte[] c = new byte[cnt];

           for (int i=0; i<cnt; i++) c[i] = b[i];

              return c;

        } catch (IOException e) {

           return null;

        }

    }

}