1 /*

     2  * Copyright (c) 2018, 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.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

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

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

    21  * questions.

    22  */

    23 

    24 package foo;

    25 

    26 import java.text.DateFormatSymbols;

    27 import java.text.spi.DateFormatSymbolsProvider;

    28 import java.util.Locale;

    29 

    30 /*

    31  * Implements DateFormatSymbolsProvider SPI, in order to check if the

    32  * extensions work correctly.

    33  */

    34 public class DateFormatSymbolsProviderImpl extends DateFormatSymbolsProvider {

    35     private static final Locale AA = Locale.forLanguageTag("en-AA");

    36     private static final Locale USJCAL = Locale.forLanguageTag("en-US-u-ca-japanese");

    37     private static final Locale[] avail = {AA, Locale.US};

    38 

    39     @Override

    40     public Locale[] getAvailableLocales() {

    41         return avail;

    42     }

    43 

    44     @Override

    45     public boolean isSupportedLocale(Locale l) {

    46         // Overriding to check the relation between

    47         // isSupportedLocale/getAvailableLocales works correctly

    48         if (l.equals(AA)) {

    49             // delegates to super, as if isSupportedLocale didn't exist.

    50             return super.isSupportedLocale(l);

    51         } else {

    52             return (l.equals(USJCAL));

    53         }

    54     }

    55 

    56     @Override

    57     public DateFormatSymbols getInstance(Locale l) {

    58         return new MyDateFormatSymbols(l);

    59     }

    60 

    61     class MyDateFormatSymbols extends DateFormatSymbols {

    62         Locale locale;

    63 

    64         public MyDateFormatSymbols(Locale l) {

    65             super(l);

    66             locale = l;

    67         }

    68 

    69         @Override

    70         public String[] getMonths() {

    71             String[] ret = super.getMonths();

    72             // replace the first item with some unique value

    73             if (locale.stripExtensions().equals(AA)) {

    74                 ret[0] = "foo";

    75             } else if (locale.equals(USJCAL)) {

    76                 ret[0] = "bar";

    77             } else {

    78                 throw new RuntimeException("Unsupported locale: " + locale);

    79             }

    80             return ret;

    81         }

    82     }

    83 }