/*

 * 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

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 */

/*

 * @test

 * @bug 6403466

 * @summary javac TaskListener should be informed when annotation processing occurs

 */

import com.sun.source.util.*;

import java.io.*;

import java.lang.annotation.*;

import java.util.*;

import javax.annotation.processing.*;

import javax.lang.model.*;

import javax.lang.model.element.*;

import javax.lang.model.type.*;

import javax.lang.model.util.*;

import javax.tools.*;

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

@Wrap

@SupportedAnnotationTypes("Wrap")

public class T6403466 extends AbstractProcessor {

    static final String testSrcDir = System.getProperty("test.src");

    static final String testClassDir = System.getProperty("test.classes");

    static final String self = T6403466.class.getName();

    static PrintWriter out = new PrintWriter(System.err, true);

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

        JavacTool tool = JavacTool.create();

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

            Iterable<? extends JavaFileObject> files =

                fm.getJavaFileObjectsFromFiles(Arrays.asList(new File(testSrcDir, self + ".java")));

            Iterable<String> options = Arrays.asList("-processorpath", testClassDir,

                                                     "-processor", self,

                                                     "-s", ".",

                                                     "-d", ".");

            JavacTask task = tool.getTask(out, fm, null, options, null, files);

            VerifyingTaskListener vtl = new VerifyingTaskListener(new File(testSrcDir, self + ".out"));

            task.setTaskListener(vtl);

            if (!task.call())

                throw new AssertionError("compilation failed");

            if (vtl.iter.hasNext() || vtl.errors)

                throw new AssertionError("comparison against golden file failed.");

        }

    }

    public boolean process(Set<? extends TypeElement> annos, RoundEnvironment rEnv) {

        if (!rEnv.processingOver()) {

            Filer filer = processingEnv.getFiler();

            for (TypeElement anno: annos) {

                Set<? extends Element> elts = rEnv.getElementsAnnotatedWith(anno);

                System.err.println("anno: " + anno);

                System.err.println("elts: " + elts);

                for (TypeElement te: ElementFilter.typesIn(elts)) {

                    try {

                        Writer out = filer.createSourceFile(te.getSimpleName() + "Wrapper").openWriter();

                        out.write("class " + te.getSimpleName() + "Wrapper { }");

                        out.close();

                    } catch (IOException ex) {

                        ex.printStackTrace();

                    }

                }

            }

        }

        return true;

    }

    @Override

    public SourceVersion getSupportedSourceVersion() {

        return SourceVersion.latest();

    }

}

@Retention(RetentionPolicy.SOURCE)

@Target(ElementType.TYPE)

@interface Wrap {

}

class VerifyingTaskListener implements TaskListener {

    VerifyingTaskListener(File ref) throws IOException {

        BufferedReader in = new BufferedReader(new FileReader(ref));

        String line;

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

        while ((line = in.readLine()) != null)

            lines.add(line);

        in.close();

        iter = lines.iterator();

    }

    public void started(TaskEvent e) {

        check("Started " + toString(e));

    }

    public void finished(TaskEvent e) {

        check("Finished " + toString(e));

    }

    // similar to TaskEvent.toString(), but just prints basename of the file

    private String toString(TaskEvent e) {

        JavaFileObject file = e.getSourceFile();

        return "TaskEvent["

            + e.getKind() + ","

            + (file == null ? null : new File(file.toUri().getPath()).getName()) + ","

            // the compilation unit is identified by the file

            + e.getTypeElement() + "]";

    }

    private void check(String s) {

        System.out.println(s); // write a reference copy of expected output to stdout

        String ref = iter.hasNext() ? iter.next() : null;

        line++;

        if (!s.equals(ref)) {

            if (ref != null)

                System.err.println(line + ": expected: " + ref);

            System.err.println(line + ":    found: " + s);

            errors = true;

        }

    }

    Iterator<String> iter;

    int line;

    boolean errors;

}