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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

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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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 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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 */

/**

 * @test

 * @bug 8195986

 * @summary Verify the type of String does not change across annotation processing rounds

 * @library /tools/lib

 * @modules

 *      jdk.compiler/com.sun.tools.javac.api

 *      jdk.compiler/com.sun.tools.javac.main

 * @build toolbox.ToolBox toolbox.JavacTask toolbox.TestRunner

 * @run main ValidTypesAreKept

 */

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.Set;

import javax.annotation.processing.AbstractProcessor;

import javax.annotation.processing.RoundEnvironment;

import javax.annotation.processing.SupportedAnnotationTypes;

import javax.lang.model.SourceVersion;

import javax.lang.model.element.TypeElement;

import javax.lang.model.type.TypeMirror;

import toolbox.JavacTask;

import toolbox.Task;

import toolbox.TestRunner;

import toolbox.ToolBox;

public class ValidTypesAreKept extends TestRunner {

    private ToolBox tb;

    public ValidTypesAreKept() {

        super(System.err);

        tb = new ToolBox();

    }

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

        new ValidTypesAreKept().runTests();

    }

    @Test

    public void testBrokenErrors() throws Exception {

        Path base = Paths.get(".");

        Path src = base.resolve("src");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        tb.writeJavaFiles(src,

                          "package t; @A(B.E) public @interface A { B value(); }",

                          "package t; public enum B { E; }");

        new JavacTask(tb)

                .outdir(classes)

                .files(tb.findJavaFiles(src))

                .run()

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        Files.delete(classes.resolve("t").resolve("B.class"));

        Path src2 = base.resolve("src2");

        Path classes2 = base.resolve("classes2");

        Files.createDirectories(classes2);

        Path output2 = base.resolve("output2");

        Files.createDirectories(output2);

        tb.writeJavaFiles(src2,

                          "package t2; @t.A class C { public native void t(String str); }");

        new JavacTask(tb)

                .classpath(classes)

                .options("-processor", AP.class.getName(),

                         "--processor-path", System.getProperty("test.classes"),

                         "-h", output2.toString())

                .outdir(classes2)

                .files(tb.findJavaFiles(src2))

                .run()

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        String content = new String(Files.readAllBytes(output2.resolve("t2_C.h")));

        if (!content.contains("(JNIEnv *, jobject, jstring)")) {

            fail("incorrect header file content: " + content);

        }

    }

    @SupportedAnnotationTypes("*")

    public static final class AP extends AbstractProcessor {

        private TypeMirror stringType;

        @Override

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

            TypeElement str = processingEnv.getElementUtils().getTypeElement("java.lang.String");

            if (str == null) {

                throw new AssertionError("java.lang.String");

            }

            if (stringType == null) {

                stringType = str.asType();

            } else {

                if (stringType != str.asType()) {

                    throw new AssertionError("The type of j.l.String changed.");

                }

            }

            return false;

        }

        @Override

        public SourceVersion getSupportedSourceVersion() {

            return SourceVersion.latest();

        }

    }

    private static void assertNonNull(String msg, Object val) {

        if (val == null) {

            throw new AssertionError(msg);

        }

    }

    static Path resolveFile(Path base, String... pathElements) {

        Path file = base;

        for (String el : pathElements) {

            file = file.resolve(el);

        }

        return file;

    }

    private static void fail(String msg) {

        throw new AssertionError(msg);

    }

}