/*

 * Copyright 2006-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/**

 * @test

 * @bug     6374357 6308351 6707027

 * @summary PackageElement.getEnclosedElements() throws ClassReader$BadClassFileException

 * @author  Peter von der Ah\u00e9

 * @run main/othervm -Xmx256m Main

 */

import java.io.File;

import java.util.*;

import javax.lang.model.SourceVersion;

import javax.lang.model.element.Element;

import javax.lang.model.element.ElementKind;

import javax.lang.model.element.PackageElement;

import javax.lang.model.element.TypeElement;

import javax.lang.model.util.Elements;

import javax.tools.*;

import com.sun.source.util.JavacTask;

import static javax.tools.StandardLocation.CLASS_PATH;

import static javax.tools.StandardLocation.PLATFORM_CLASS_PATH;

import static javax.tools.JavaFileObject.Kind.CLASS;

public class Main {

    public static PackageElement getPackage(TypeElement type) {

        Element owner = type;

        while (owner.getKind() != ElementKind.PACKAGE)

            owner = owner.getEnclosingElement();

        return (PackageElement)owner;

    }

    static int progress = 0;

    static JavaCompiler tool;

    static JavacTask javac;

    static Elements elements;

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

        JavaCompiler tool = ToolProvider.getSystemJavaCompiler();

        StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null);

        fm.setLocation(CLASS_PATH, Collections.<File>emptyList());

        JavacTask javac = (JavacTask)tool.getTask(null, fm, null, null, null, null);

        Elements elements = javac.getElements();

        final Set<String> packages = new LinkedHashSet<String>();

        int nestedClasses = 0;

        int classes = 0;

        for (JavaFileObject file : fm.list(PLATFORM_CLASS_PATH, "", EnumSet.of(CLASS), true)) {

            String type = fm.inferBinaryName(PLATFORM_CLASS_PATH, file);

            if (type.endsWith("package-info"))

                continue;

            try {

                TypeElement elem = elements.getTypeElement(type);

                if (elem == null && type.indexOf('$') > 0) {

                    nestedClasses++;

                    type = null;

                    continue;

                }

                classes++;

                packages.add(getPackage(elem).getQualifiedName().toString());

                elements.getTypeElement(type).getKind(); // force completion

                type = null;

            } finally {

                if (type != null)

                    System.err.println("Looking at " + type);

            }

        }

        javac = null;

        elements = null;

        elements = javac.getElements();

        for (String name : packages) {

            PackageElement pe = elements.getPackageElement(name);

            for (Element e : pe.getEnclosedElements()) {

                e.getSimpleName().getClass();

            }

        }

        /*

         * A few sanity checks based on current values:

         *

         * packages: 775, classes: 12429 + 5917

         *

         * As the platform evolves the numbers are likely to grow

         * monotonically but in case somebody gets a clever idea for

         * limiting the number of packages exposed, this number might

         * drop.  So we test low values.

         */

        System.out.format("packages: %s, classes: %s + %s%n",

                          packages.size(), classes, nestedClasses);

        if (classes < 9000)

            throw new AssertionError("Too few classes in PLATFORM_CLASS_PATH ;-)");

        if (packages.size() < 530)

            throw new AssertionError("Too few packages in PLATFORM_CLASS_PATH ;-)");

        if (nestedClasses < 3000)

            throw new AssertionError("Too few nested classes in PLATFORM_CLASS_PATH ;-)");

    }

}