/*

 * Copyright (c) 2005, 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 6304912

 * @summary unit test for Log

 */

import java.lang.reflect.Field;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.URI;

import java.util.Set;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import com.sun.tools.javac.file.JavacFileManager;

import com.sun.tools.javac.parser.Parser;

import com.sun.tools.javac.parser.ParserFactory;

import com.sun.tools.javac.tree.EndPosTable;

import com.sun.tools.javac.tree.JCTree;

import com.sun.tools.javac.tree.TreeScanner;

import com.sun.tools.javac.util.Context;

import com.sun.tools.javac.util.Log;

import com.sun.tools.javac.util.JCDiagnostic;

import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;

import com.sun.tools.javac.util.JCDiagnostic.Factory;

import com.sun.tools.javac.util.Options;

public class TestLog

{

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

        test(false);

        test(true);

    }

    static void test(boolean genEndPos) throws Exception {

        Context context = new Context();

        Options options = Options.instance(context);

        options.put("diags", "%b:%s/%o/%e:%_%t%m|%p%m");

        Log log = Log.instance(context);

        Factory diagnosticFactory = JCDiagnostic.Factory.instance(context);

        Field defaultErrorFlagsField =

                JCDiagnostic.Factory.class.getDeclaredField("defaultErrorFlags");

        defaultErrorFlagsField.setAccessible(true);

        Set<DiagnosticFlag> defaultErrorFlags =

                (Set<DiagnosticFlag>) defaultErrorFlagsField.get(diagnosticFactory);

        defaultErrorFlags.add(DiagnosticFlag.MULTIPLE);

        JavacFileManager.preRegister(context);

        ParserFactory pfac = ParserFactory.instance(context);

        final String text =

              "public class Foo {\n"

            + "  public static void main(String[] args) {\n"

            + "    if (args.length == 0)\n"

            + "      System.out.println(\"no args\");\n"

            + "    else\n"

            + "      System.out.println(args.length + \" args\");\n"

            + "  }\n"

            + "}\n";

        JavaFileObject fo = new StringJavaFileObject("Foo", text);

        log.useSource(fo);

        CharSequence cs = fo.getCharContent(true);

        Parser parser = pfac.newParser(cs, false, genEndPos, false);

        JCTree.JCCompilationUnit tree = parser.parseCompilationUnit();

        log.setEndPosTable(fo, tree.endPositions);

        TreeScanner ts = new LogTester(log, tree.endPositions);

        ts.scan(tree);

        check(log.nerrors, 4, "errors");

        check(log.nwarnings, 4, "warnings");

    }

    private static void check(int found, int expected, String name) {

        if (found == expected)

            System.err.println(found + " " + name + " found, as expected.");

        else {

            System.err.println("incorrect number of " + name + " found.");

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

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

            throw new IllegalStateException("test failed");

        }

    }

    private static class LogTester extends TreeScanner {

        LogTester(Log log, EndPosTable endPosTable) {

            this.log = log;

            this.endPosTable = endPosTable;

        }

        public void visitIf(JCTree.JCIf tree) {

            JCDiagnostic.DiagnosticPosition nil = null;

            // generate dummy messages to exercise the log API

            log.error("not.stmt");

            log.error(tree.pos, "not.stmt");

            log.error(tree.pos(), "not.stmt");

            log.error(nil, "not.stmt");

            log.warning("div.zero");

            log.warning(tree.pos, "div.zero");

            log.warning(tree.pos(), "div.zero");

            log.warning(nil, "div.zero");

        }

        private Log log;

        private EndPosTable endPosTable;

    }

    private static class StringJavaFileObject extends SimpleJavaFileObject {

        StringJavaFileObject(String name, String text) {

            super(URI.create(name), JavaFileObject.Kind.SOURCE);

            this.text = text;

        }

        public CharSequence getCharContent(boolean b) {

            return text;

        }

        public InputStream openInputStream() {

            throw new UnsupportedOperationException();

        }

        public OutputStream openOutputStream() {

            throw new UnsupportedOperationException();

        }

        private String text;

    }

}