/*

 * Copyright (c) 2010, 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.

 */

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.StringWriter;

import java.util.Arrays;

import java.util.Iterator;

import java.util.List;

import javax.lang.model.element.Element;

import javax.tools.DiagnosticCollector;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.ToolProvider;

import com.sun.source.tree.CompilationUnitTree;

import com.sun.source.util.JavacTask;

/**

 * @test

 * @bug 6956638

 * @summary JavacTask.generate does not generate all required files

 * @modules jdk.compiler

 */

public class T6956638 {

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

        new T6956638().run();

    }

    void run() throws Exception {

        File srcDir = new File("src");

        File[] files = {

            writeFile(new File(srcDir, "T1.java"),

                "public class T1 extends T2 {}\n"),

            writeFile(new File(srcDir, "T2.java"),

                "public class T2 extends T3 {}\n"),

            writeFile(new File(srcDir, "T3.java"),

                "public class T3 { public static final int C = 1; }\n"),

            writeFile(new File(srcDir, "Test.java"),

                "public class Test { public static final int D = T1.C; }\n")

        };

        for (File f1: files) {

            for (File f2: files) {

                if (f2 == f1) continue;

                for (File f3: files) {

                    if (f3 == f2 || f3 == f1) continue;

                    for (File f4: files) {

                        if (f4 == f3 || f4 == f2 || f4 == f1) continue;

                        try {

                            test(f1, f2, f3, f4);

                        } catch (Exception e) {

                            error(e);

                        }

                    }

                }

            }

        }

        if (errors > 0)

            throw new Exception(errors + " tests failed");

    }

    void test(File... sourceFiles) throws Exception {

        System.err.println("Test " + (++count) + ": " + Arrays.asList(sourceFiles));

        File classesDir = new File("classes" + count);

        classesDir.mkdirs();

        StringWriter compilerOutputStream = new StringWriter();

        List<String> compileOptions = Arrays.asList("-d", classesDir.getPath());

        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

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

        try (StandardJavaFileManager fileManager = compiler.getStandardFileManager(diagnosticCollector, null, null)) {

            Iterable<? extends JavaFileObject> sourceFileObjects = fileManager.getJavaFileObjects(sourceFiles);

            System.err.println("1- javac given java source JavaFileObjects " + sourceFileObjects);

            JavaCompiler.CompilationTask task = compiler.getTask(compilerOutputStream, fileManager, null, compileOptions, null, sourceFileObjects);

            JavacTask javacTask = (JavacTask) task;

            Iterable<? extends CompilationUnitTree> parsedTrees = javacTask.parse();

            Iterable<? extends Element> analyzedTrees = javacTask.analyze();

            Iterable<? extends JavaFileObject> generatedFiles = javacTask.generate();

            System.err.println("2- parsed:" + size(parsedTrees) + " analysed:" + size(analyzedTrees) + " generated:" + size(generatedFiles));

            System.err.print("3-");

            for (JavaFileObject f : generatedFiles)

                System.err.print(" " + f);

            System.err.println("");

            System.err.print("5-");

            for (File f : classesDir.listFiles())

                System.err.print(" " + f);

            System.err.println("");

            System.err.println("----");

            System.err.println(compilerOutputStream.toString());

            if (size(generatedFiles) != size(parsedTrees)) {

                throw new Exception("wrong number of files generated: " + size(generatedFiles)

                        + " expected: " + size(parsedTrees));

            }

        }

    }

    private void error(Throwable t) {

        t.printStackTrace();

        errors++;

    }

    int count;

    int errors;

    private static <E> int size(Iterable<E> x) {

        int n = 0;

        for (Iterator<E> iter = x.iterator(); iter.hasNext(); ++n)

            iter.next();

        return n;

    }

    private static File writeFile(File f, String str) throws IOException {

        f.getParentFile().mkdirs();

        BufferedWriter fout = new BufferedWriter(new FileWriter(f));

        try {

            fout.write(str);

            fout.flush();

        } finally {

            fout.close();

        }

        return f;

    }

}