/*

 * 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

 * @summary Test StringSharingPluginTest

 * @author Jean-Francois Denise

 * @library ../../lib

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

 *          java.base/jdk.internal.jimage.decompressor

 *          jdk.jlink/jdk.tools.jlink.internal

 *          jdk.jlink/jdk.tools.jlink.internal.plugins

 *          jdk.jlink/jdk.tools.jlink.plugin

 *          jdk.jlink/jdk.tools.jmod

 *          jdk.jlink/jdk.tools.jimage

 *          jdk.jdeps/com.sun.tools.classfile

 *          jdk.compiler

 * @run build tests.*

 * @run main StringSharingPluginTest

 */

import java.io.IOException;

import java.io.UncheckedIOException;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.Arrays;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.function.Consumer;

import jdk.internal.jimage.decompressor.CompressedResourceHeader;

import jdk.internal.jimage.decompressor.StringSharingDecompressor;

import jdk.tools.jlink.internal.ResourcePoolManager;

import jdk.tools.jlink.internal.StringTable;

import jdk.tools.jlink.internal.plugins.StringSharingPlugin;

import jdk.tools.jlink.plugin.ResourcePoolEntry;

import jdk.tools.jlink.plugin.ResourcePool;

import jdk.tools.jlink.plugin.Plugin;

import tests.Helper;

import tests.JImageValidator;

public class StringSharingPluginTest {

    private static int strID = 1;

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

        Helper helper = Helper.newHelper();

        if (helper == null) {

            System.err.println("Test not run, NO jmods directory");

            return;

        }

        List<String> classes = Arrays.asList("toto.Main", "toto.com.foo.bar.X");

        Path compiledClasses = helper.generateModuleCompiledClasses(

                helper.getJmodSrcDir(), helper.getJmodClassesDir(), "composite2", classes);

        Map<String, Integer> map = new HashMap<>();

        Map<Integer, String> reversedMap = new HashMap<>();

        ResourcePoolManager resources = new ResourcePoolManager(ByteOrder.nativeOrder(), new StringTable() {

            @Override

            public int addString(String str) {

                Integer id = map.get(str);

                if (id == null) {

                    id = strID;

                    map.put(str, id);

                    reversedMap.put(id, str);

                    strID += 1;

                }

                return id;

            }

            @Override

            public String getString(int id) {

                throw new UnsupportedOperationException("Not supported yet.");

            }

        });

        Consumer<Path> c = (p) -> {

            // take only the .class resources.

            if (Files.isRegularFile(p) && p.toString().endsWith(".class")

                    && !p.toString().endsWith("module-info.class")) {

                try {

                    byte[] content = Files.readAllBytes(p);

                    String path = p.toString().replace('\\', '/');

                    path = path.substring("/modules".length());

                    if (path.charAt(0) != '/') {

                        path = "/" + path;

                    }

                    ResourcePoolEntry res = ResourcePoolEntry.create(path, content);

                    resources.add(res);

                } catch (Exception ex) {

                    throw new RuntimeException(ex);

                }

            }

        };

        try (java.util.stream.Stream<Path> stream = Files.walk(compiledClasses)) {

            stream.forEach(c);

        }

        Plugin plugin = new StringSharingPlugin();

        ResourcePoolManager resultMgr = new ResourcePoolManager(resources.byteOrder(), resources.getStringTable());

        ResourcePool result = plugin.transform(resources.resourcePool(), resultMgr.resourcePoolBuilder());

        if (result.isEmpty()) {

            throw new AssertionError("No result");

        }

        result.entries().forEach(res -> {

            if (res.path().endsWith(".class")) {

                try {

                    byte[] uncompacted = StringSharingDecompressor.normalize(reversedMap::get, res.contentBytes(),

                        CompressedResourceHeader.getSize());

                    JImageValidator.readClass(uncompacted);

                } catch (IOException exp) {

                    throw new UncheckedIOException(exp);

                }

            }

        });

    }

}