| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
| LocaleFunctionSupport |
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| 7.0;7 |
| 1 | /* |
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| 2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/ext/LocaleFunctionSupport.java,v 1.9 2005/06/28 13:44:45 elharo Exp $ |
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| 3 | * $Revision: 1.9 $ |
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| 4 | * $Date: 2005/06/28 13:44:45 $ |
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| 5 | * |
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| 6 | * ==================================================================== |
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| 7 | * |
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| 8 | * Copyright (C) 2000-2002 bob mcwhirter & James Strachan. |
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| 9 | * All rights reserved. |
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| 10 | * |
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| 11 | * Redistribution and use in source and binary forms, with or without |
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| 12 | * modification, are permitted provided that the following conditions |
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| 13 | * are met: |
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| 14 | * |
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| 15 | * 1. Redistributions of source code must retain the above copyright |
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| 16 | * notice, this list of conditions, and the following disclaimer. |
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| 17 | * |
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| 18 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 19 | * notice, this list of conditions, and the disclaimer that follows |
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| 20 | * these conditions in the documentation and/or other materials |
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| 21 | * provided with the distribution. |
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| 22 | * |
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| 23 | * 3. The name "Jaxen" must not be used to endorse or promote products |
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| 24 | * derived from this software without prior written permission. For |
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| 25 | * written permission, please contact license@jaxen.org. |
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| 26 | * |
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| 27 | * 4. Products derived from this software may not be called "Jaxen", nor |
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| 28 | * may "Jaxen" appear in their name, without prior written permission |
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| 29 | * from the Jaxen Project Management (pm@jaxen.org). |
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| 30 | * |
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| 31 | * In addition, we request (but do not require) that you include in the |
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| 32 | * end-user documentation provided with the redistribution and/or in the |
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| 33 | * software itself an acknowledgement equivalent to the following: |
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| 34 | * "This product includes software developed by the |
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| 35 | * Jaxen Project <http://www.jaxen.org/>." |
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| 36 | * Alternatively, the acknowledgment may be graphical using the logos |
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| 37 | * available at http://www.jaxen.org/ |
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| 38 | * |
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| 39 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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| 40 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 41 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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| 42 | * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT |
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| 43 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| 44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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| 45 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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| 46 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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| 47 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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| 48 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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| 49 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 50 | * SUCH DAMAGE. |
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| 51 | * |
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| 52 | * ==================================================================== |
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| 53 | * This software consists of voluntary contributions made by many |
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| 54 | * individuals on behalf of the Jaxen Project and was originally |
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| 55 | * created by bob mcwhirter <bob@werken.com> and |
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| 56 | * James Strachan <jstrachan@apache.org>. For more information on the |
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| 57 | * Jaxen Project, please see <http://www.jaxen.org/>. |
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| 58 | * |
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| 59 | * $Id: LocaleFunctionSupport.java,v 1.9 2005/06/28 13:44:45 elharo Exp $ |
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| 60 | */ |
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| 61 | ||
| 62 | package org.jaxen.function.ext; |
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| 63 | ||
| 64 | import java.util.List; |
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| 65 | import java.util.Locale; |
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| 66 | import java.util.StringTokenizer; |
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| 67 | ||
| 68 | import org.jaxen.Function; |
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| 69 | import org.jaxen.Navigator; |
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| 70 | import org.jaxen.function.StringFunction; |
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| 71 | ||
| 72 | /** |
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| 73 | * <p>An abstract base class for Locale-specific extension |
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| 74 | * functions. This class provides convenience methods that |
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| 75 | * can be inherited, specifically to find a Locale from |
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| 76 | * an XPath function argument value. |
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| 77 | * </p> |
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| 78 | * |
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| 79 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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| 80 | */ |
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| 81 | 576 | public abstract class LocaleFunctionSupport implements Function |
| 82 | { |
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| 83 | ||
| 84 | /** |
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| 85 | * Attempts to convert the given function argument value |
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| 86 | * into a Locale either via casting, extracting it from a List |
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| 87 | * or looking up the named Locale using reflection. |
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| 88 | * |
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| 89 | * @param value is either a Locale, a List containing a Locale |
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| 90 | * or a String containing the name of a Locale |
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| 91 | * as defined by the Locale static members. |
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| 92 | * |
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| 93 | * @return the Locale for the value or null if one could |
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| 94 | * not be deduced |
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| 95 | */ |
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| 96 | protected Locale getLocale(Object value, Navigator navigator) |
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| 97 | { |
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| 98 | 72 | if (value instanceof Locale) |
| 99 | { |
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| 100 | 0 | return (Locale) value; |
| 101 | } |
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| 102 | 72 | else if(value instanceof List) |
| 103 | { |
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| 104 | 0 | List list = (List) value; |
| 105 | 0 | if ( ! list.isEmpty() ) |
| 106 | { |
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| 107 | 0 | return getLocale( list.get(0), navigator ); |
| 108 | } |
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| 109 | } |
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| 110 | else { |
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| 111 | 72 | String text = StringFunction.evaluate( value, navigator ); |
| 112 | 72 | if (text != null && text.length() > 0) |
| 113 | { |
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| 114 | 72 | return findLocale( text ); |
| 115 | } |
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| 116 | } |
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| 117 | 0 | return null; |
| 118 | } |
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| 119 | ||
| 120 | /** |
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| 121 | * Tries to find a Locale instance by name using |
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| 122 | * <a href="http://www.ietf.org/rfc/rfc3066.txt" target="_top">RFC 3066</a> |
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| 123 | * language tags such as 'en', 'en-US', 'en-US-Brooklyn'. |
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| 124 | * |
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| 125 | * @param localeText the RFC 3066 language tag |
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| 126 | * @return the locale for the given text or null if one could not |
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| 127 | * be found |
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| 128 | */ |
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| 129 | protected Locale findLocale(String localeText) { |
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| 130 | 72 | StringTokenizer tokens = new StringTokenizer( localeText, "-" ); |
| 131 | 72 | if (tokens.hasMoreTokens()) |
| 132 | { |
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| 133 | 72 | String language = tokens.nextToken(); |
| 134 | 72 | if (! tokens.hasMoreTokens()) |
| 135 | { |
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| 136 | 24 | return findLocaleForLanguage(language); |
| 137 | } |
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| 138 | else |
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| 139 | { |
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| 140 | 48 | String country = tokens.nextToken(); |
| 141 | 48 | if (! tokens.hasMoreTokens()) |
| 142 | { |
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| 143 | 24 | return new Locale(language, country); |
| 144 | } |
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| 145 | else |
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| 146 | { |
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| 147 | 24 | String variant = tokens.nextToken(); |
| 148 | 24 | return new Locale(language, country, variant); |
| 149 | } |
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| 150 | } |
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| 151 | } |
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| 152 | 0 | return null; |
| 153 | } |
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| 154 | ||
| 155 | /** |
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| 156 | * Finds the locale with the given language name with no country |
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| 157 | * or variant, such as Locale.ENGLISH or Locale.FRENCH |
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| 158 | * |
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| 159 | * @param language the language code to look for |
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| 160 | * @return the locale for the given language or null if one could not |
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| 161 | * be found |
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| 162 | */ |
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| 163 | protected Locale findLocaleForLanguage(String language) { |
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| 164 | 24 | Locale[] locales = Locale.getAvailableLocales(); |
| 165 | 1992 | for ( int i = 0, size = locales.length; i < size; i++ ) |
| 166 | { |
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| 167 | 1992 | Locale locale = locales[i]; |
| 168 | 1992 | if ( language.equals( locale.getLanguage() ) ) |
| 169 | { |
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| 170 | 24 | String country = locale.getCountry(); |
| 171 | 24 | if ( country == null || country.length() == 0 ) |
| 172 | { |
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| 173 | 24 | String variant = locale.getVariant(); |
| 174 | 24 | if ( variant == null || variant.length() == 0 ) |
| 175 | { |
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| 176 | 24 | return locale; |
| 177 | } |
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| 178 | } |
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| 179 | } |
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| 180 | } |
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| 181 | 0 | return null; |
| 182 | } |
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| 183 | } |