/*

 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. 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 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 7031108

 * @summary NPE in javac.jvm.ClassReader.findMethod in PackageElement.enclosedElements from AP in incr build

 * @library /tools/javac/lib

 * @modules java.compiler

 *          jdk.compiler

 * @build JavacTestingAbstractProcessor T7031108

 * @run main T7031108

 */

import java.io.*;

import java.net.*;

import java.util.*;

import javax.annotation.processing.*;

import javax.lang.model.element.*;

import javax.tools.*;

import javax.tools.JavaCompiler.CompilationTask;

public class T7031108 extends JavacTestingAbstractProcessor {

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

        new T7031108().run();

    }

    /* Class containing a local class definition;

     * compiled class file will have an EnclosedMethod attribute.

     */

    static final JavaSource pC =

            new JavaSource("p/C.java",

                  "package p;\n"

                + "class C {\n"

                + "    void m() {\n"

                + "        new Runnable() {\n"

                + "            public void run() {\n"

                + "                new Runnable() {\n"

                + "                    public void run() { }\n"

                + "                };\n"

                + "            }\n"

                + "        };\n"

                + "    }\n"

                + "}");

    private static final String PACKAGE_CONTENT_ERROR = "package does not contain C";

    /* Dummy source file to compile while running anno processor. */

    static final JavaSource dummy =

            new JavaSource("Dummy.java",

                "class Dummy { }");

    void run() throws Exception {

        JavaCompiler comp = ToolProvider.getSystemJavaCompiler();

        try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {

            // step 1: compile test classes

            File cwd = new File(".");

            fm.setLocation(StandardLocation.CLASS_OUTPUT, Arrays.asList(cwd));

            compile(comp, fm, null, null, pC);

            // step 2: verify functioning of processor

            fm.setLocation(StandardLocation.ANNOTATION_PROCESSOR_PATH,

                    fm.getLocation(StandardLocation.CLASS_PATH));

            fm.setLocation(StandardLocation.CLASS_PATH, Arrays.asList(cwd));

            compile(comp, fm, null, getClass().getName(), dummy);

            File pC_class = new File(new File("p"), "C.class");

            pC_class.delete();

            DiagnosticCollector<JavaFileObject> dc = new DiagnosticCollector<JavaFileObject>();

            compile(comp, fm, dc, getClass().getName(), dummy);

            List<Diagnostic<? extends JavaFileObject>> diags =dc.getDiagnostics();

            System.err.println(diags);

            switch (diags.size()) {

                case 0:

                    throw new Exception("no diagnostics received");

                case 1:

                    String code = diags.get(0).getCode();

                    String expect = "compiler.err.proc.messager";

                    if (!expect.equals(code))

                        throw new Exception("unexpected diag code: " + code

                                + ", expected: " + expect);

                    String message = diags.get(0).getMessage(null);

                    if (!PACKAGE_CONTENT_ERROR.equals(message)) {

                        throw new Exception("unexpected diag message: " + code

                                + ", expected: " + PACKAGE_CONTENT_ERROR);

                    }

                    break;

                default:

                    throw new Exception("unexpected diags received");

            }

        }

    }

    void compile(JavaCompiler comp, JavaFileManager fm,

            DiagnosticListener<JavaFileObject> dl,

            String processor, JavaFileObject... files) throws Exception {

        System.err.println("compile processor:" + processor + ", files:" + Arrays.asList(files));

        List<String> opts = new ArrayList<String>();

        if (processor != null) {

            // opts.add("-verbose");

            opts.addAll(Arrays.asList("-processor", processor));

        }

        CompilationTask task = comp.getTask(null, fm, dl, opts, null, Arrays.asList(files));

        boolean ok = task.call();

        if (dl == null && !ok)

            throw new Exception("compilation failed");

    }

    static class JavaSource extends SimpleJavaFileObject {

        JavaSource(String name, String text) {

            super(URI.create("js://" + name), JavaFileObject.Kind.SOURCE);

            this.text = text;

        }

        @Override

        public CharSequence getCharContent(boolean ignoreEncodingErrors) {

            return text;

        }

        final String text;

    }

    // annotation processor method

    @Override

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

        if (!roundEnv.processingOver()) {

            PackageElement p = elements.getPackageElement("p");

            List<? extends Element> elems = p.getEnclosedElements();

            System.err.println("contents of package p: " + elems);

            if (elems.size() != 1 || !elems.get(0).getSimpleName().contentEquals("C")) {

                messager.printMessage(Diagnostic.Kind.ERROR, PACKAGE_CONTENT_ERROR);

            }

        }

        return true;

    }

}