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 *

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 *

 * 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

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 * 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,

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 *

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 */

/*

 * @test

 * @bug     6421111

 * @summary NullPointerException thrown when retrieving bounds for the type parameter

 * @author  Peter von der Ah\u00e9

 * @library ../lib

 * @build ToolTester

 * @compile -Xlint:all T6421111.java

 * @run main T6421111

 */

import java.io.File;

import java.io.IOException;

import java.net.URI;

import java.util.Arrays;

import java.util.Collections;

import java.util.Set;

import javax.annotation.processing.AbstractProcessor;

import javax.annotation.processing.RoundEnvironment;

import javax.annotation.processing.SupportedAnnotationTypes;

import javax.annotation.processing.SupportedSourceVersion;

import javax.lang.model.SourceVersion;

import javax.lang.model.element.TypeElement;

import javax.lang.model.element.TypeParameterElement;

import javax.lang.model.type.DeclaredType;

import javax.lang.model.type.TypeVariable;

import javax.tools.SimpleJavaFileObject;

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

public class T6421111 extends ToolTester {

    void test(String... args) {

        class Test1 extends SimpleJavaFileObject {

            Test1() {

                super(URI.create("myfo:///Test1.java"), SOURCE);

            }

            @Override

            public String getCharContent(boolean ignoreEncodingErrors) {

                return "class Test1<T extends Thread & Runnable> {}";

            }

        }

        class Test2 extends SimpleJavaFileObject {

            Test2() {

                super(URI.create("myfo:///Test2.java"), SOURCE);

            }

            @Override

            public String getCharContent(boolean ignoreEncodingErrors) {

                return "class Test2<T extends Test2<T> & Runnable> {}";

            }

        }

        task = tool.getTask(null, fm, null, Collections.singleton("-Xlint:all"), null,

                            Arrays.asList(new Test1(), new Test2()));

        task.setProcessors(Collections.singleton(new MyProcessor()));

        if (!task.call())

            throw new AssertionError("Annotation processor failed");

    }

    @SupportedAnnotationTypes("*")

    static class MyProcessor extends AbstractProcessor {

        void test(TypeElement element, boolean fbound) {

            TypeParameterElement tpe = element.getTypeParameters().iterator().next();

            tpe.getBounds().getClass();

            if (fbound) {

                DeclaredType type = (DeclaredType)tpe.getBounds().get(0);

                if (type.asElement() != element)

                    throw error("%s != %s", type.asElement(), element);

                TypeVariable tv = (TypeVariable)type.getTypeArguments().get(0);

                if (tv.asElement() != tpe)

                    throw error("%s != %s", tv.asElement(), tpe);

            }

        }

        public boolean process(Set<? extends TypeElement> annotations,

                               RoundEnvironment roundEnv) {

            test(processingEnv.getElementUtils().getTypeElement("Test1"), false);

            test(processingEnv.getElementUtils().getTypeElement("Test2"), true);

            return false;

        }

        @Override

        public SourceVersion getSupportedSourceVersion() {

            return SourceVersion.latest();

        }

    }

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

        try (T6421111 t = new T6421111()) {

            t.test(args);

        }

    }

    public static AssertionError error(String format, Object... args) {

        return new AssertionError(String.format(format, args));

    }

}