/*

 * Copyright (c) 2011, 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 7068451

 * @summary Regression: javac compiles fixed sources against previous,

 *              not current, version of generated sources

 */

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileWriter;

import java.io.IOException;

import java.io.Writer;

import java.util.Arrays;

import java.util.Collections;

import java.util.List;

import java.util.Set;

import javax.annotation.processing.AbstractProcessor;

import javax.annotation.processing.Filer;

import javax.annotation.processing.Messager;

import javax.annotation.processing.RoundEnvironment;

import javax.annotation.processing.SupportedAnnotationTypes;

import javax.lang.model.SourceVersion;

import javax.lang.model.element.TypeElement;

import javax.tools.Diagnostic.Kind;

import javax.tools.JavaCompiler;

import javax.tools.JavaCompiler.CompilationTask;

import javax.tools.StandardLocation;

import javax.tools.ToolProvider;

public class T7068451 {

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

        new T7068451().run();

    }

    void run() throws Exception {

        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

        System.err.println("using " + compiler.getClass() + " from " + compiler.getClass().getProtectionDomain().getCodeSource());

        File tmp = new File("tmp");

        tmp.mkdir();

        for (File f: tmp.listFiles())

            f.delete();

        File input = writeFile(tmp, "X.java", "package p; class X { { p.C.first(); } }");

        List<String> opts = Arrays.asList(

                "-s", tmp.getPath(),

                "-d", tmp.getPath(),

                "-XprintRounds");

        System.err.println();

        System.err.println("FIRST compilation");

        System.err.println();

        CompilationTask task = compiler.getTask(null, null, null, opts, null,

                compiler.getStandardFileManager(null, null, null).getJavaFileObjects(input));

        task.setProcessors(Collections.singleton(new Proc("first")));

        check("compilation", task.call());

        writeFile(tmp, "X.java", "package p; class X { { p.C.second(); } }");

        //Thread.sleep(2000);

        System.err.println();

        System.err.println("SECOND compilation");

        System.err.println();

        task = compiler.getTask(null, null, null, opts, null,

                compiler.getStandardFileManager(null, null, null).getJavaFileObjects(input));

        task.setProcessors(Collections.singleton(new Proc("second")));

        check("compilation", task.call());

        //Thread.sleep(2000);

        System.err.println();

        System.err.println("SECOND compilation, REPEATED");

        System.err.println();

        task = compiler.getTask(null, null, null, opts, null,

                compiler.getStandardFileManager(null, null, null).getJavaFileObjects(input));

        task.setProcessors(Collections.singleton(new Proc("second")));

        check("compilation", task.call());

    }

    void check(String msg, boolean ok) {

        System.err.println(msg + ": " + (ok ? "ok" : "failed"));

        if (!ok)

            throw new AssertionError(msg);

    }

    static File writeFile(File base, String path, String body) throws IOException {

        File f = new File(base, path);

        FileWriter out = new FileWriter(f);

        out.write(body);

        out.close();

        System.err.println("wrote " + path + ": " + body);

        return f;

    }

    @SupportedAnnotationTypes("*")

    private static class Proc extends AbstractProcessor {

        final String m;

        Proc(String m) {

            this.m = m;

        }

        int count;

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

            if (roundEnv.processingOver() || count++ > 0) {

                return false;

            }

            Filer filer = processingEnv.getFiler();

            Messager messager = processingEnv.getMessager();

            System.err.println("running Proc");

            try {

                int len = filer.getResource(StandardLocation.SOURCE_OUTPUT, "p", "C.java").getCharContent(false).length();

                messager.printMessage(Kind.NOTE, "C.java: found previous content of length " + len);

            } catch (FileNotFoundException x) {

                messager.printMessage(Kind.NOTE, "C.java: not previously there");

            } catch (IOException x) {

                messager.printMessage(Kind.ERROR, "while reading: " + x);

            }

            try {

                String body = "package p; public class C { public static void " + m + "() {} }";

                Writer w = filer.createSourceFile("p.C").openWriter();

                w.write(body);

                w.close();

                messager.printMessage(Kind.NOTE, "C.java: wrote new content: " + body);

            } catch (IOException x) {

                messager.printMessage(Kind.ERROR, "while writing: " + x);

            }

            return true;

        }

        @Override

        public SourceVersion getSupportedSourceVersion() {

            return SourceVersion.latest();

        }

    }

}