/*

 * 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 6993305

 * @summary starting position of a method without modifiers and with type parameters is incorrect

 */

import java.io.File;

import javax.tools.JavaFileObject;

import javax.tools.StandardJavaFileManager;

import com.sun.source.tree.CompilationUnitTree;

import com.sun.source.tree.MethodTree;

import com.sun.source.util.JavacTask;

import com.sun.source.util.SourcePositions;

import com.sun.source.util.TreeScanner;

import com.sun.source.util.Trees;

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

import java.io.IOException;

/*

 * Test verifies the starting position of all methods by computing the start position

 * of each method as the first non-white character on the first line containing

 * (" " + methodName + "("), and then comparing this value against the reported

 * value in the SourcePositions table.

 */

public class T6993305 {

    <T> void test1(T t) { }  // this is the primary case to be tested

    public <T> void test2(T t) { }

    @Deprecated <T> void test3(T t) { }

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

        new T6993305().run();

    }

    void run() throws Exception {

        File testSrc = new File(System.getProperty("test.src"));

        JavacTool tool = JavacTool.create();

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

            File f = new File(testSrc, T6993305.class.getSimpleName() + ".java");

            Iterable<? extends JavaFileObject> fos = fm.getJavaFileObjects(f);

            JavacTask task = tool.getTask(null, fm, null, null, null, fos);

            Iterable<? extends CompilationUnitTree> cus = task.parse();

            TestScanner s = new TestScanner();

            s.scan(cus, task);

            if (errors > 0)

                throw new Exception(errors + " errors occurred");

        }

    }

    void error(String msg) {

        System.err.println("Error: " + msg);

        errors++;

    }

    int errors;

    class TestScanner extends TreeScanner<Void, JavacTask> {

        CompilationUnitTree cu;

        SourcePositions sourcePositions;

        String source;

        void show(String label, int pos) {

            System.err.println(label + ": " +

                    source.substring(pos, Math.min(source.length(), pos + 10)));

        }

        @Override public Void visitCompilationUnit(CompilationUnitTree tree, JavacTask task) {

            cu = tree;

            Trees trees = Trees.instance(task);

            sourcePositions = trees.getSourcePositions();

            try {

                source = String.valueOf(tree.getSourceFile().getCharContent(true));

            } catch (IOException e) {

                throw new Error(e);

            }

            return super.visitCompilationUnit(tree, task);

        }

        // this is the core of the test

        @Override public Void visitMethod(MethodTree tree, JavacTask task) {

            String name = String.valueOf(tree.getName());

            int pos = source.indexOf(" " + name + "(");

            while (source.charAt(pos - 1) != '\n') pos--;

            while (source.charAt(pos) == ' ') pos++;

            int expectedStart = pos;

            int reportedStart = (int) sourcePositions.getStartPosition(cu, tree);

            System.err.println("Method " + name

                    + " expectedStart:" + expectedStart

                    + " reportedStart:" + reportedStart);

            if (expectedStart != reportedStart) {

                error("Unexpected value for " + name);

                show("expected", expectedStart);

                show("reported", reportedStart);

            }

            return super.visitMethod(tree, task);

        }

    }

}