/*

 * Copyright (c) 2006, 2020, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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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 */

package java.lang;

abstract class CharacterData {

    abstract int getProperties(int ch);

    abstract int getType(int ch);

    abstract boolean isDigit(int ch);

    abstract boolean isLowerCase(int ch);

    abstract boolean isUpperCase(int ch);

    abstract boolean isWhitespace(int ch);

    abstract boolean isMirrored(int ch);

    abstract boolean isJavaIdentifierStart(int ch);

    abstract boolean isJavaIdentifierPart(int ch);

    abstract boolean isUnicodeIdentifierStart(int ch);

    abstract boolean isUnicodeIdentifierPart(int ch);

    abstract boolean isIdentifierIgnorable(int ch);

    abstract int toLowerCase(int ch);

    abstract int toUpperCase(int ch);

    abstract int toTitleCase(int ch);

    abstract int digit(int ch, int radix);

    abstract int getNumericValue(int ch);

    abstract byte getDirectionality(int ch);

    //need to implement for JSR204

    int toUpperCaseEx(int ch) {

        return toUpperCase(ch);

    }

    char[] toUpperCaseCharArray(int ch) {

        return null;

    }

    boolean isOtherAlphabetic(int ch) {

        return false;

    }

    boolean isIdeographic(int ch) {

        return false;

    }

    // Character <= 0xff (basic latin) is handled by internal fast-path

    // to avoid initializing large tables.

    // Note: performance of this "fast-path" code may be sub-optimal

    // in negative cases for some accessors due to complicated ranges.

    // Should revisit after optimization of table initialization.

    static final CharacterData of(int ch) {

        if (ch >>> 8 == 0) {     // fast-path

            return CharacterDataLatin1.instance;

        } else {

            return switch (ch >>> 16) {  //plane 00-16

                case 0 -> CharacterData00.instance;

                case 1 -> CharacterData01.instance;

                case 2 -> CharacterData02.instance;

                case 3 -> CharacterData03.instance;

                case 14 -> CharacterData0E.instance;

                case 15, 16 -> CharacterDataPrivateUse.instance; // Both cases Private Use

                default -> CharacterDataUndefined.instance;

            };

        }

    }

}