001: /* ====================================================================
002: * The LateralNZ Software License, Version 1.0
003: *
004: * Copyright (c) 2003 LateralNZ. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * 2. Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in
015: * the documentation and/or other materials provided with the
016: * distribution.
017: *
018: * 3. The end-user documentation included with the redistribution,
019: * if any, must include the following acknowledgment:
020: * "This product includes software developed by
021: * LateralNZ (http://www.lateralnz.org/) and other third parties."
022: * Alternately, this acknowledgment may appear in the software itself,
023: * if and wherever such third-party acknowledgments normally appear.
024: *
025: * 4. The names "LateralNZ" must not be used to endorse or promote
026: * products derived from this software without prior written
027: * permission. For written permission, please
028: * contact oss@lateralnz.org.
029: *
030: * 5. Products derived from this software may not be called "Panther",
031: * or "Lateral" or "LateralNZ", nor may "PANTHER" or "LATERAL" or
032: * "LATERALNZ" appear in their name, without prior written
033: * permission of LateralNZ.
034: *
035: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
036: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046: * SUCH DAMAGE.
047: * ====================================================================
048: *
049: * This software consists of voluntary contributions made by many
050: * individuals on behalf of LateralNZ. For more
051: * information on Lateral, please see http://www.lateralnz.com/ or
052: * http://www.lateralnz.org
053: *
054: */
055: package org.lateralnz.common.util;
056:
057: import java.util.HashMap;
058: import java.util.Locale;
059:
060: /**
061: * utility class for caching locale objects
062: *
063: * @author J R Briggs
064: */
065: public final class LocaleUtils implements Constants {
066: private static HashMap locales = new HashMap();
067:
068: private static final Locale get(String lang, String cty, String var) {
069: Locale loc = new Locale((lang == null ? EMPTY : lang),
070: (cty == null ? EMPTY : cty),
071: (var == null ? EMPTY : var));
072:
073: synchronized (locales) {
074: String key = getKey(lang, cty, var);
075: if (!locales.containsKey(key)) {
076: locales.put(key, loc);
077: } else {
078: loc = (Locale) locales.get(key);
079: }
080: }
081:
082: return loc;
083: }
084:
085: private static final String getKey(String lang, String cty,
086: String var) {
087: lang = (lang == null ? lang = EMPTY : lang);
088: cty = (cty == null ? cty = EMPTY : cty);
089: var = (var == null ? var = EMPTY : var);
090:
091: return lang + UNDERSCORE + cty + UNDERSCORE + var;
092: }
093:
094: /**
095: * get a locale using the specified language, country and variant.
096: * Note: if this is not found in the cache, it will be created
097: */
098: public static final Locale getLocale(String lang, String cty,
099: String var) {
100: String key = getKey(lang, cty, var);
101: if (locales.containsKey(key)) {
102: return (Locale) locales.get(key);
103: } else {
104: return get(lang, cty, var);
105: }
106: }
107:
108: public static final Locale getLocale(String fullkey) {
109: if (locales.containsKey(fullkey)) {
110: return (Locale) locales.get(fullkey);
111: } else {
112: String[] s = fullkey.split(UNDERSCORE, 3);
113: if (s.length == 3) {
114: return get(s[0], s[1], s[2]);
115: } else if (s.length == 2) {
116: return get(s[0], s[1], null);
117: } else {
118: return get(s[0], null, null);
119: }
120: }
121: }
122:
123: }
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