Android example source code file (PluralRules.java)

This example Android source code file (PluralRules.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

id_other, pluralrules, quantity_few, quantity_many, quantity_one, quantity_other, quantity_two, quantity_zero, string, util

The PluralRules.java Android example source code

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.content.res;

import java.util.Locale;

/*
 * Yuck-o.  This is not the right way to implement this.  When the ICU PluralRules
 * object has been integrated to android, we should switch to that.  For now, yuck-o.
 */

abstract class PluralRules {

    static final int QUANTITY_OTHER = 0x0000;
    static final int QUANTITY_ZERO  = 0x0001;
    static final int QUANTITY_ONE   = 0x0002;
    static final int QUANTITY_TWO   = 0x0004;
    static final int QUANTITY_FEW   = 0x0008;
    static final int QUANTITY_MANY  = 0x0010;

    static final int ID_OTHER = 0x01000004;

    abstract int quantityForNumber(int n);

    final int attrForNumber(int n) {
        return PluralRules.attrForQuantity(quantityForNumber(n));
    }

    static final int attrForQuantity(int quantity) {
        // see include/utils/ResourceTypes.h
        switch (quantity) {
            case QUANTITY_ZERO: return 0x01000005;
            case QUANTITY_ONE:  return 0x01000006;
            case QUANTITY_TWO:  return 0x01000007;
            case QUANTITY_FEW:  return 0x01000008;
            case QUANTITY_MANY: return 0x01000009;
            default:            return ID_OTHER;
        }
    }

    static final String stringForQuantity(int quantity) {
        switch (quantity) {
            case QUANTITY_ZERO:
                return "zero";
            case QUANTITY_ONE:
                return "one";
            case QUANTITY_TWO:
                return "two";
            case QUANTITY_FEW:
                return "few";
            case QUANTITY_MANY:
                return "many";
            default:
                return "other";
        }
    }

    static final PluralRules ruleForLocale(Locale locale) {
        String lang = locale.getLanguage();
        if ("cs".equals(lang)) {
            if (cs == null) cs = new cs();
            return cs;
        }
        else {
            if (en == null) en = new en();
            return en;
        }
    }

    private static PluralRules cs;
    private static class cs extends PluralRules {
        int quantityForNumber(int n) {
            if (n == 1) {
                return QUANTITY_ONE;
            }
            else if (n >= 2 && n <= 4) {
                return QUANTITY_FEW;
            }
            else {
                return QUANTITY_OTHER;
            }
        }
    }

    private static PluralRules en;
    private static class en extends PluralRules {
        int quantityForNumber(int n) {
            if (n == 1) {
                return QUANTITY_ONE;
            }
            else {
                return QUANTITY_OTHER;
            }
        }
    }
}