/*

 * Copyright (c) 2008, 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 5066863 5066867 5066874 5066879 5066884 5066887 5065777 6730652

   @summary canEncode() false iff encode() throws CharacterCodingException

   @run main/timeout=1200 FindCanEncodeBugs

   @author Martin Buchholz

 */

import java.util.*;

import java.nio.charset.*;

import java.nio.*;

public class FindCanEncodeBugs {

    static boolean encodable1(CharsetEncoder enc, char c) {

        enc.reset();

        return enc.canEncode(c);

    }

    static boolean encodable2(CharsetEncoder enc, char c) {

        enc.reset();

        try { enc.encode(CharBuffer.wrap(new char[]{c})); return true; }

        catch (CharacterCodingException e) { return false; }

    }

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

        int failures = 0;

        for (Map.Entry<String,Charset> e

                 : Charset.availableCharsets().entrySet()) {

            String csn = e.getKey();

            Charset cs = e.getValue();

            if (! cs.canEncode() || csn.matches("x-COMPOUND_TEXT"))

                continue;

            //System.out.println(csn);

            CharsetEncoder enc = cs.newEncoder();

            for (int i = Character.MIN_VALUE; i <= Character.MAX_VALUE; i++) {

                boolean encodable1 = encodable1(enc, (char)i);

                boolean encodable2 = encodable2(enc, (char)i);

                if (encodable1 != encodable2) {

                    int start = i;

                    int end = i;

                    for (int j = i;

                         j <= '\uffff' &&

                             encodable1(enc, (char)j) == encodable1 &&

                             encodable2(enc, (char)j) == encodable2;

                         j++)

                        end = j;

                    System.out.printf("charset=%-18s canEncode=%-5b ",

                                      csn, encodable1);

                    if (start == end)

                        System.out.printf("\'\\u%04x\'%n", start);

                    else

                        System.out.printf("\'\\u%04x\' - \'\\u%04x\'%n",

                                          start, end);

                    i = end;

                    failures++;

                }

            }

        }

        if (failures > 0)

            throw new Exception(failures + " failures");

    }

}