/*

 * Copyright (c) 2010, 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.

 */

package nsk.sysdict.share;

import java.lang.reflect.Field;

import nsk.share.Failure;

import nsk.share.TestFailure;

import nsk.share.sysdict.ClassLoadersChain;

import nsk.share.test.Tests;

/**

 * This is a main class for all chain tests.

 */

public class ChainTest extends SysDictTest {

    public ChainTest(String[] args) {

        parseArgs(args);

    }

    public static void main(String args[]) {

        Tests.runTest(new ChainTest(args), args);

    }

    private static final int NxM_FACTOR = 450;

    private int classesHeight;

    private int loadersHeight;

    String[] classNames;

    @Override

    protected void parseArgs(String args[]) {

        super.parseArgs(args);

        boolean isLoaderHeightDefault = true;

        boolean isHeightDefault = true;

        for (int i = 0; i < args.length; i++) {

            if (args[i].equals("-classloaderHeight")) {

                loadersHeight = Integer.parseInt(args[i + 1]);

                if (loadersHeight > 0) {

                    isLoaderHeightDefault = false;

                }

            }

            if (args[i].equals("-height")) {

                classesHeight = Integer.parseInt(args[i + 1]);

                if (classesHeight > 0) {

                    isHeightDefault = false;

                }

            }

        }

        Class info;

        try {

            if (useFats) {

                info = createJarLoader().loadClass(PACKAGE_PREFIX + "FatsInfo");

            } else {

                info = createJarLoader().loadClass(PACKAGE_PREFIX + "LeansInfo");

            }

            System.out.println("name=" + info.getName());

            for (Field field : info.getDeclaredFields()) {

                System.err.println("field = " + field.getName());

            }

            if (isHeightDefault) {

                classesHeight = info.getField("HEIGHT").getInt(null);

            }

            if (isLoaderHeightDefault) {

                loadersHeight = NxM_FACTOR / classesHeight;

            }

            if (loadersHeight * classesHeight != NxM_FACTOR) {

                throw new Failure("classes height must divide " + NxM_FACTOR);

            }

            if (loadersHeight == 0) {

                throw new Failure("loaders height should be positive");

            }

            if (classesHeight == 0) {

                throw new Failure("classes height should be positive");

            }

            classNames = new String[classesHeight];

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

                classNames[i] = PACKAGE_PREFIX + info.getField("rootName").get(null)

                        + ((String[]) info.getField("nodeNames").get(null))[i];

            }

            if (classNames == null || classNames.length == 0) {

                throw new TestFailure("No classes names for loading");

            }

            System.out.println("The classHeight = " + classesHeight + " the loadersHeight = " + loadersHeight);

        } catch (Exception e) {

            throw new TestFailure("Can't initialize test correctly", e);

        }

    }

    @Override

    String[] getClassNames() {

        return classNames;

    }

    @Override

    ClassLoader[] createLoaders() {

        ClassLoader loaders[] = new ClassLoader[loadersHeight];

        ClassLoader jarLoader = createJarLoader();

        ClassLoadersChain loadersChain =

                new ClassLoadersChain(jarLoader, loadersHeight);

        // direct ordering: root loader first

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

            loaders[i] = loadersChain.getLoader(loadersHeight - 1 - i);

        }

        return loaders;

    }

}