1 /*

     2  * Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

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

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

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package java.lang;

    27 

    28 abstract class CharacterData {

    29     abstract int getProperties(int ch);

    30     abstract int getType(int ch);

    31     abstract boolean isWhitespace(int ch);

    32     abstract boolean isMirrored(int ch);

    33     abstract boolean isJavaIdentifierStart(int ch);

    34     abstract boolean isJavaIdentifierPart(int ch);

    35     abstract boolean isUnicodeIdentifierStart(int ch);

    36     abstract boolean isUnicodeIdentifierPart(int ch);

    37     abstract boolean isIdentifierIgnorable(int ch);

    38     abstract int toLowerCase(int ch);

    39     abstract int toUpperCase(int ch);

    40     abstract int toTitleCase(int ch);

    41     abstract int digit(int ch, int radix);

    42     abstract int getNumericValue(int ch);

    43     abstract byte getDirectionality(int ch);

    44 

    45     //need to implement for JSR204

    46     int toUpperCaseEx(int ch) {

    47         return toUpperCase(ch);

    48     }

    49 

    50     char[] toUpperCaseCharArray(int ch) {

    51         return null;

    52     }

    53 

    54     boolean isOtherLowercase(int ch) {

    55         return false;

    56     }

    57 

    58     boolean isOtherUppercase(int ch) {

    59         return false;

    60     }

    61 

    62     boolean isOtherAlphabetic(int ch) {

    63         return false;

    64     }

    65 

    66     boolean isIdeographic(int ch) {

    67         return false;

    68     }

    69 

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

    71     // to avoid initializing large tables.

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

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

    74     // Should revisit after optimization of table initialization.

    75 

    76     static final CharacterData of(int ch) {

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

    78             return CharacterDataLatin1.instance;

    79         } else {

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

    81             case(0):

    82                 return CharacterData00.instance;

    83             case(1):

    84                 return CharacterData01.instance;

    85             case(2):

    86                 return CharacterData02.instance;

    87             case(14):

    88                 return CharacterData0E.instance;

    89             case(15):   // Private Use

    90             case(16):   // Private Use

    91                 return CharacterDataPrivateUse.instance;

    92             default:

    93                 return CharacterDataUndefined.instance;

    94             }

    95         }

    96     }

    97 }