/*

 * 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.

 */

/*

 * This test runs in othervm mode as it tests ClassLoader.findSystemClass

 * and getSystemResource methods.

 */

/* @test

   @bug 4147599 4478150

   @summary In 1.2beta4-I ClassLoader loaded classes can not link

            against application classes.

   @run main/othervm Loader

*/

/*

 * We are trying to test that certain methods of ClassLoader look at the same

 * paths as they did in 1.1.  To run this test on 1.1, you will have to pass

 * "-1.1" as option on the command line.

 *

 * The required files are:

 *

 *      - Loader.java            (a 1.1 style class loader)

 *      - Loadee.java            (source for a class that refers to Loader)

 *      - Loadee.classfile       (to test findSystemClass)

 *      - Loadee.resource        (to test getSystemResource)

 *      - java/lang/Object.class (to test getSystemResources)

 *

 * The extension ".classfile" is so the class file is not seen by any loader

 * other than Loader.  If you need to make any changes you will have to

 * compile Loadee.java and rename Loadee.class to Loadee.classfile.

 */

import java.io.File;

import java.io.DataInputStream;

import java.io.FileInputStream;

import java.io.IOException;

import java.net.URL;

import java.util.HashSet;

/**

 * A 1.1-style ClassLoader.  The only class it can really load is "Loadee".

 * For other classes it might be asked to load, it relies on loaders set up by

 * the launcher.

 */

public class Loader extends ClassLoader {

    public Class loadClass(String name, boolean resolve)

        throws ClassNotFoundException {

        Class c = null;

        try {

            c = findSystemClass(name);

        } catch (ClassNotFoundException cnfe) {

        }

        if (c == null) {

            if (!name.equals("Loadee"))

                throw new Error("java.lang.ClassLoader.findSystemClass() " +

                                "did not find class " + name);

            byte[] b = locateBytes();

            c = defineClass(name, b, 0, b.length);

        }

        if (resolve) {

            resolveClass(c);

        }

        return c;

    }

    private byte[] locateBytes() {

        try {

            File f   = new File(System.getProperty("test.src", "."),

                                "Loadee.classfile");

            long l   = f.length();

            byte[] b = new byte[(int)l];

            DataInputStream in =

                new DataInputStream(new FileInputStream(f));

            in.readFully(b);

            return b;

        } catch (IOException ioe) {

            ioe.printStackTrace();

            throw new Error("Test failed due to IOException!");

        }

    }

    private static final int FIND      = 0x1;

    private static final int RESOURCE  = 0x2;

    private static final int RESOURCES = 0x4;

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

        int tests = FIND | RESOURCE | RESOURCES;

        if (args.length == 1 && args[0].equals("-1.1")) {

            tests &= ~RESOURCES; /* Do not run getResources test. */

        }

        if ((tests & FIND) == FIND) {

            report("findSystemClass()");

            ClassLoader l = new Loader();

            Class       c = l.loadClass("Loadee");

            Object      o = c.newInstance();

        }

        if ((tests & RESOURCE) == RESOURCE) {

            report("getSystemResource()");

            URL u = getSystemResource("Loadee.resource");

            if (u == null)

                throw new Exception

                    ("java.lang.ClassLoader.getSystemResource() test failed!");

        }

        if ((tests & RESOURCES) == RESOURCES) {

            report("getSystemResources()");

            java.util.Enumeration e =

                getSystemResources("java/lang/Object.class");

            HashSet hs = new HashSet();

            while (e.hasMoreElements()) {

                URL u = (URL)e.nextElement();

                if (u == null)

                    break;

                System.out.println("url: " + u);

                hs.add(u);

            }

            if (hs.size() != 2) {

                throw

                    new Exception("java.lang.ClassLoader.getSystemResources()"+

                                  " did not find all resources");

            }

        }

    }

    private static void report(String s) {

        System.out.println("Testing java.lang.ClassLoader." + s + " ...");

    }

}