/*

 * 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

 * @bug 6499673

 * @library /tools/javac/lib

 * @build JavacTestingAbstractProcessor BoundsTest

 * @run main BoundsTest

 * @summary Assertion check for TypeVariable.getUpperBound() fails

 */

import com.sun.source.util.*;

import com.sun.tools.javac.api.*;

import com.sun.tools.javac.file.*;

import javax.annotation.processing.*;

import javax.lang.model.SourceVersion;

import javax.lang.model.type.*;

import javax.lang.model.util.ElementFilter;

import javax.lang.model.element.*;

import javax.tools.*;

import java.util.*;

import java.io.*;

public class BoundsTest {

    private int errors = 0;

    private static final String Intersection_name = "IntersectionTest.java";

    private static final String Intersection_contents =

        "import java.util.List;\n" +

        "import java.io.Serializable;\t" +

        "public class IntersectionTest<S extends List & Serializable> {\n" +

        "  void method(S s) { }\n" +

        "}";

    private static final String[] Intersection_bounds = {

        "java.util.List",

        "java.io.Serializable"

    };

    private static final String[] Intersection_supers = {

        "java.util.List",

        "java.io.Serializable"

    };

    private static final String Single_name = "SingleTest.java";

    private static final String Single_contents =

        "import java.util.List;\n" +

        "public class SingleTest<S extends List> {\n" +

        "  void method(S s) { }\n" +

        "}";

    private static final String[] Single_bounds = {

        "java.util.List",

    };

    private static final String[] Single_supers = {

        "java.lang.Object",

        "java.util.Collection"

    };

    private static final String NoBounds_name = "NoBoundsTest.java";

    private static final String NoBounds_contents =

        "public class NoBoundsTest<S> {\n" +

        "  void method(S s) { }\n" +

        "}";

    private static final String[] NoBounds_bounds = {

        "java.lang.Object",

    };

    private static final String[] NoBounds_supers = {};

    private HashSet<String> expected_bounds;

    private HashSet<String> expected_supers;

    private static final File classesdir = new File("intersectionproperties");

    private static final JavaCompiler comp =

        ToolProvider.getSystemJavaCompiler();

    private static final StandardJavaFileManager fm =

        comp.getStandardFileManager(null, null, null);

    public void runOne(final String Test_name, final String Test_contents,

                       final String[] Test_bounds, final String[] Test_supers)

        throws IOException {

        System.err.println("Testing " + Test_name);

        expected_bounds = new HashSet<>(Arrays.asList(Test_bounds));

        expected_supers = new HashSet<>(Arrays.asList(Test_supers));

        final Iterable<? extends JavaFileObject> files =

            fm.getJavaFileObjectsFromFiles(Collections.singleton(writeFile(classesdir, Test_name, Test_contents)));

        final JavacTask ct =

            (JavacTask)comp.getTask(null, fm, null, null, null, files);

        ct.setProcessors(Collections.singleton(new TestProcessor()));

        if (!ct.call()) {

            System.err.println("Compilation unexpectedly failed");

            errors++;

        }

    }

    public void run() throws IOException {

        try {

            runOne(Intersection_name, Intersection_contents,

                   Intersection_bounds, Intersection_supers);

            runOne(Single_name, Single_contents,

                   Single_bounds, Single_supers);

            runOne(NoBounds_name, NoBounds_contents,

                   NoBounds_bounds, NoBounds_supers);

            if (0 != errors)

                throw new RuntimeException(errors + " errors occurred");

        } finally {

            fm.close();

        }

    }

    public static void main(String... args) throws IOException {

        new BoundsTest().run();

    }

    private static File writeFile(File dir, String path, String body)

        throws IOException {

        File f = new File(dir, path);

        f.getParentFile().mkdirs();

        try (FileWriter out = new FileWriter(f)) {

            out.write(body);

        }

        return f;

    }

    private class TestProcessor extends JavacTestingAbstractProcessor {

        private Set<? extends Element> rootElements;

        public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {

            rootElements = roundEnv.getRootElements();

            if (!rootElements.isEmpty()) {

                performCheck();

            }

            return true;

        }

        private void performCheck() {

            TypeElement typeElement = (TypeElement) rootElements.iterator().next();

            ExecutableElement method = ElementFilter.methodsIn(typeElement.getEnclosedElements()).get(0);

            TypeVariable typeVariable = (TypeVariable) method.getParameters().get(0).asType();

            final TypeMirror upperBound = typeVariable.getUpperBound();

            TypeParameterElement typeParameterElement = ((TypeParameterElement) typeVariable.asElement());

            final List<? extends TypeMirror> bounds = typeParameterElement.getBounds();

            final List<? extends TypeMirror> supers = processingEnv.getTypeUtils().directSupertypes(upperBound);

            final HashSet<String> actual_bounds = new HashSet<>();

            final HashSet<String> actual_supers = new HashSet<>();

            for(TypeMirror ty : bounds) {

                actual_bounds.add(((TypeElement)((DeclaredType)ty).asElement()).getQualifiedName().toString());

            }

            for(TypeMirror ty : supers) {

                actual_supers.add(((TypeElement)((DeclaredType)ty).asElement()).getQualifiedName().toString());

            }

            if (!expected_bounds.equals(actual_bounds)) {

                System.err.println("Mismatched expected and actual bounds.");

                System.err.println("Expected:");

                for(CharSequence tm : expected_bounds)

                    System.err.println("  " + tm);

                System.err.println("Actual:");

                for(CharSequence tm : actual_bounds)

                    System.err.println("  " + tm);

                errors++;

            }

            if (!expected_supers.equals(actual_supers)) {

                System.err.println("Mismatched expected and actual supers.");

                System.err.println("Expected:");

                for(CharSequence tm : expected_supers)

                    System.err.println("  " + tm);

                System.err.println("Actual:");

                for(CharSequence tm : actual_supers)

                    System.err.println("  " + tm);

                errors++;

            }

        }

    }

}