Java > Open Source Codes > org > jboss > axis > i18n > RB


1 /*
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4  *
5  * Copyright (c) 2001-2003 The Apache Software Foundation. All rights
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55
56 package org.jboss.axis.i18n;
57
58 import java.io.IOException ;
59 import java.io.InputStream ;
60 import java.text.MessageFormat ;
61 import java.util.Enumeration ;
62 import java.util.Hashtable ;
63 import java.util.Locale ;
64 import java.util.MissingResourceException ;
65 import java.util.Properties ;
66
67 /**
68  * CURRENTLY NOT USED
69  * KEEPING FOR REFERENCE 9/19/2002
70  * <p/>
71  * <p>Wrapper class for resource bundles. Property files are used to store
72  * resource strings, which are the only types of resources available.
73  * Property files can inherit properties from other files so that
74  * a base property file can be used and a small number of properties
75  * can be over-ridden by another property file. For example you may
76  * create an english version of a resource file named "resource.properties".
77  * You then decide that the British English version of all of the properties
78  * except one are the same, so there is no need to redefine all of the
79  * properties in "resource_en_GB", just the one that is different.</p>
80  * <p>The property file lookup searches for classes with various suffixes
81  * on the basis if the desired local and the current default local
82  * (as returned by Local.getDefault()). As property files are found the
83  * property values are merged so that inheritance is preserved.</p>
84  * <p>The order of searching is:</p>
85  * <dir>
86  * basename + "_" + langage + "_" + country + "_" + variant
87  * basename + "_" + langage + "_" + country
88  * basename + "_" + langage
89  * basename + "_" + defaultLanguage + "_" + defaultCountry + "_" + defaultVariant
90  * basename + "_" + defaultLanguage + "_" + defaultCountry
91  * basename + "_" + defaultLanguage
92  * basename
93  * </dir>
94  * <p>The basename is the name of the property file without the ".properties"
95  * extension.</p>
96  * <p>Properties will be cached for performance.<p>
97  * <p>Property values stored in the property files can also contain dynamic
98  * variables. Any dynamic variable defined in PropertiesUtil.getVariableValue()
99  * can be used (such as {date}), as well as arguments in the form {0}, {1}, etc.
100  * Argument values are specified in the various overloaded getString() methods.</p>
101  *
102  * @author Karl Moss (kmoss@macromedia.com)
103  * @author Glen Daniels (gdaniels@macromedia.com)
104  */
105 public class RB
106 {
107    // The static cache of properties. The key is the basename + the local +
108 // the default local and the element is the Properties object containing
109 // the resources
110 static Hashtable propertyCache = new Hashtable ();
111
112    // The default base name
113 public static final String BASE_NAME = "resource";
114
115    // The property file extension
116 public static final String PROPERTY_EXT = ".properties";
117
118    // The name of the current base property file (with extension)
119 protected String basePropertyFileName;
120
121    // The properties for the current resource bundle
122 protected Properties resourceProperties;
123
124    /**
125     * Construct a new RB
126     *
127     * @param name The name of the property file without the ".properties" extension
128     */
129    public RB(String name) throws MissingResourceException
130    {
131       this(null, name, null);
132    }
133
134    /**
135     * Construct a new RB
136     *
137     * @param caller The calling object. This is used to get the package name
138     * to further construct the basename as well as to get the proper ClassLoader
139     * @param name The name of the property file without the ".properties" extension
140     */
141    public RB(Object caller, String name) throws MissingResourceException
142    {
143       this(caller, name, null);
144    }
145
146    /**
147     * Construct a new RB
148     *
149     * @param caller The calling object. This is used to get the package name
150     * to further construct the basename as well as to get the proper ClassLoader
151     * @param name The name of the property file without the ".properties" extension
152     * @param local The local
153     */
154    public RB(Object caller, String name, Locale locale) throws MissingResourceException
155    {
156       ClassLoader cl = null;
157
158       if (caller != null)
159       {
160
161          Class c;
162          if (caller instanceof Class )
163          {
164             c = (Class )caller;
165          }
166          else
167          {
168             c = caller.getClass();
169          }
170
171          // Get the appropriate class loader
172 cl = c.getClassLoader();
173
174          if (name.indexOf("/") == -1)
175          {
176
177             // Create the full basename only if not given
178 String fullName = c.getName();
179
180             int pos = fullName.lastIndexOf(".");
181             if (pos > 0)
182             {
183                name = fullName.substring(0, pos + 1).replace('.', '/') + name;
184             }
185          }
186       }
187       else
188       {
189          // Try the shared default properties file...
190 if (name.indexOf("/") == -1)
191          {
192             name = "org/jboss/axis/default-resource";
193          }
194       }
195
196       Locale defaultLocale = Locale.getDefault();
197
198       // If the locale given is the same as the default locale, ignore it
199 if (locale != null)
200       {
201          if (locale.equals(defaultLocale))
202          {
203             locale = null;
204          }
205       }
206
207       // Load the properties. If no property files exist then a
208 // MissingResourceException will be thrown
209 loadProperties(name, cl, locale, defaultLocale);
210    }
211
212    /**
213     * Gets a string message from the resource bundle for the given key
214     *
215     * @param key The resource key
216     * @return The message
217     */
218    public String getString(String key) throws MissingResourceException
219    {
220       return getString(key, (Object [])null);
221    }
222
223    /**
224     * <p>Gets a string message from the resource bundle for the given key. The
225     * message may contain variables that will be substituted with the given
226     * arguments. Variables have the format:</p>
227     * <dir>
228     * This message has two variables: {0} and {1}
229     * </dir>
230     *
231     * @param key The resource key
232     * @param arg0 The argument to place in variable {0}
233     * @return The message
234     */
235    public String getString(String key, Object arg0) throws MissingResourceException
236    {
237       Object [] o = new Object [1];
238       o[0] = arg0;
239       return getString(key, o);
240    }
241
242    /**
243     * <p>Gets a string message from the resource bundle for the given key. The
244     * message may contain variables that will be substituted with the given
245     * arguments. Variables have the format:</p>
246     * <dir>
247     * This message has two variables: {0} and {1}
248     * </dir>
249     *
250     * @param key The resource key
251     * @param arg0 The argument to place in variable {0}
252     * @param arg1 The argument to place in variable {1}
253     * @return The message
254     */
255    public String getString(String key, Object arg0, Object arg1) throws MissingResourceException
256    {
257       Object [] o = new Object [2];
258       o[0] = arg0;
259       o[1] = arg1;
260       return getString(key, o);
261    }
262
263    /**
264     * <p>Gets a string message from the resource bundle for the given key. The
265     * message may contain variables that will be substituted with the given
266     * arguments. Variables have the format:</p>
267     * <dir>
268     * This message has two variables: {0} and {1}
269     * </dir>
270     *
271     * @param key The resource key
272     * @param arg0 The argument to place in variable {0}
273     * @param arg1 The argument to place in variable {1}
274     * @param arg2 The argument to place in variable {1}
275     * @return The message
276     */
277    public String getString(String key, Object arg0, Object arg1, Object arg2) throws MissingResourceException
278    {
279       Object [] o = new Object [3];
280       o[0] = arg0;
281       o[1] = arg1;
282       o[2] = arg2;
283       return getString(key, o);
284    }
285
286    /**
287     * <p>Gets a string message from the resource bundle for the given key. The
288     * message may contain variables that will be substituted with the given
289     * arguments. Variables have the format:</p>
290     * <dir>
291     * This message has two variables: {0} and {1}
292     * </dir>
293     *
294     * @param key The resource key
295     * @param array An array of objects to place in corresponding variables
296     * @return The message
297     */
298    public String getString(String key, Object [] array) throws MissingResourceException
299    {
300       String msg = null;
301       if (resourceProperties != null)
302       {
303          msg = resourceProperties.getProperty(key);
304       }
305
306       if (msg == null)
307       {
308          throw new MissingResourceException ("Cannot find resource key \"" + key +
309                  "\" in base name " + basePropertyFileName,
310                  basePropertyFileName, key);
311       }
312
313       msg = MessageFormat.format(msg, array);
314       return msg;
315    }
316
317    protected void loadProperties(String basename, ClassLoader loader, Locale locale,
318                                  Locale defaultLocale)
319            throws MissingResourceException
320    {
321       // Check the cache first
322 String loaderName = "";
323       if (loader != null)
324       {
325          loaderName = ":" + loader.hashCode();
326       }
327       String cacheKey = basename + ":" + locale + ":" + defaultLocale + loaderName;
328       Properties p = (Properties )propertyCache.get(cacheKey);
329       basePropertyFileName = basename + PROPERTY_EXT;
330
331       if (p == null)
332       {
333          // The properties were not found in the cache. Search the given locale
334 // first
335 if (locale != null)
336          {
337             p = loadProperties(basename, loader, locale, p);
338          }
339
340          // Search the default locale
341 if (defaultLocale != null)
342          {
343             p = loadProperties(basename, loader, defaultLocale, p);
344          }
345
346          // Search for the basename
347 p = merge(p, loadProperties(basePropertyFileName, loader));
348
349          if (p == null)
350          {
351             throw new MissingResourceException ("Cannot find resource for base name " +
352                     basePropertyFileName, basePropertyFileName, "");
353          }
354
355          // Cache the properties
356 propertyCache.put(cacheKey, p);
357
358       }
359
360       resourceProperties = p;
361    }
362
363    protected Properties loadProperties(String basename, ClassLoader loader, Locale locale,
364                                        Properties props)
365    {
366
367       String language = locale.getLanguage();
368       String country = locale.getCountry();
369       String variant = locale.getVariant();
370       if (variant != null)
371       {
372          if (variant.trim().length() == 0)
373          {
374             variant = null;
375          }
376       }
377
378       if (language != null)
379       {
380
381          if (country != null)
382          {
383
384             if (variant != null)
385             {
386                props = merge(props, loadProperties(basename + "_" + language + "_" + country + "_" + variant +
387                        PROPERTY_EXT, loader));
388             }
389             props = merge(props, loadProperties(basename + "_" + language + "_" + country +
390                     PROPERTY_EXT, loader));
391          }
392          props = merge(props, loadProperties(basename + "_" + language + PROPERTY_EXT, loader));
393       }
394       return props;
395    }
396
397    protected Properties loadProperties(String resname, ClassLoader loader)
398    {
399       Properties props = null;
400
401       // Attempt to open and load the properties
402 InputStream in = null;
403       try
404       {
405          if (loader != null)
406          {
407             in = loader.getResourceAsStream(resname);
408          }
409
410          // Either we're using the system class loader or we didn't find the
411 // resource using the given class loader
412 if (in == null)
413          {
414             in = ClassLoader.getSystemResourceAsStream(resname);
415          }
416          if (in != null)
417          {
418             props = new Properties ();
419             try
420             {
421                props.load(in);
422             }
423             catch (IOException ex)
424             {
425                // On error, clear the props
426 props = null;
427             }
428          }
429       }
430       finally
431       {
432          if (in != null)
433          {
434             try
435             {
436                in.close();
437             }
438             catch (Exception ex)
439             {
440                // Ignore error on close
441 }
442          }
443       }
444       return props;
445    }
446
447    /**
448     * Merge two Properties objects
449     */
450    protected Properties merge(Properties p1, Properties p2)
451    {
452       if ((p1 == null) &&
453               (p2 == null))
454       {
455          return null;
456       }
457       else if (p1 == null)
458       {
459          return p2;
460       }
461       else if (p2 == null)
462       {
463          return p1;
464       }
465
466       // Now merge. p1 takes precedence
467 Enumeration en = p2.keys();
468       while (en.hasMoreElements())
469       {
470          String key = (String )en.nextElement();
471          if (p1.getProperty(key) == null)
472          {
473             p1.put(key, p2.getProperty(key));
474          }
475       }
476
477       return p1;
478    }
479
480    /**
481     * Get the underlying properties
482     */
483    public Properties getProperties()
484    {
485       return resourceProperties;
486    }
487
488    // STATIC ACCESSORS
489
490    /**
491     * Get a message from resource.properties from the package of the given object.
492     *
493     * @param caller The calling object, used to get the package name and class loader
494     * @param key The resource key
495     * @return The formatted message
496     */
497    public static String getString(Object caller, String key)
498            throws MissingResourceException
499    {
500       return getMessage(caller, BASE_NAME, null, key, null);
501    }
502
503    /**
504     * Get a message from resource.properties from the package of the given object.
505     *
506     * @param caller The calling object, used to get the package name and class loader
507     * @param key The resource key
508     * @param arg0 The argument to place in variable {0}
509     * @return The formatted message
510     */
511    public static String getString(Object caller, String key, Object arg0)
512            throws MissingResourceException
513    {
514       Object [] o = new Object [1];
515       o[0] = arg0;
516       return getMessage(caller, BASE_NAME, null, key, o);
517    }
518
519    /**
520     * Get a message from resource.properties from the package of the given object.
521     *
522     * @param caller The calling object, used to get the package name and class loader
523     * @param key The resource key
524     * @param arg0 The argument to place in variable {0}
525     * @param arg1 The argument to place in variable {1}
526     * @return The formatted message
527     */
528    public static String getString(Object caller, String key, Object arg0, Object arg1)
529            throws MissingResourceException
530    {
531       Object [] o = new Object [2];
532       o[0] = arg0;
533       o[1] = arg1;
534       return getMessage(caller, BASE_NAME, null, key, o);
535    }
536
537    /**
538     * Get a message from resource.properties from the package of the given object.
539     *
540     * @param caller The calling object, used to get the package name and class loader
541     * @param key The resource key
542     * @param arg0 The argument to place in variable {0}
543     * @param arg1 The argument to place in variable {1}
544     * @param arg2 The argument to place in variable {2}
545     * @return The formatted message
546     */
547    public static String getString(Object caller, String key, Object arg0, Object arg1, Object arg2)
548            throws MissingResourceException
549    {
550       Object [] o = new Object [3];
551       o[0] = arg0;
552       o[1] = arg1;
553       o[2] = arg2;
554       return getMessage(caller, BASE_NAME, null, key, o);
555    }
556
557    /**
558     * Get a message from resource.properties from the package of the given object.
559     *
560     * @param caller The calling object, used to get the package name and class loader
561     * @param key The resource key
562     * @param arg0 The argument to place in variable {0}
563     * @param arg1 The argument to place in variable {1}
564     * @param arg2 The argument to place in variable {2}
565     * @param arg3 The argument to place in variable {3}
566     * @return The formatted message
567     */
568    public static String getString(Object caller, String key, Object arg0, Object arg1, Object arg2, Object arg3)
569            throws MissingResourceException
570    {
571       Object [] o = new Object [4];
572       o[0] = arg0;
573       o[1] = arg1;
574       o[2] = arg2;
575       o[3] = arg3;
576       return getMessage(caller, BASE_NAME, null, key, o);
577    }
578
579
580    /**
581     * Get a message from resource.properties from the package of the given object.
582     *
583     * @param caller The calling object, used to get the package name and class loader
584     * @param key The resource key
585     * @param arg0 The argument to place in variable {0}
586     * @param arg1 The argument to place in variable {1}
587     * @param arg2 The argument to place in variable {2}
588     * @param arg3 The argument to place in variable {3}
589     * @param arg4 The argument to place in variable {4}
590     * @return The formatted message
591     */
592    public static String getString(Object caller, String key, Object arg0, Object arg1, Object arg2, Object arg3, Object arg4)
593            throws MissingResourceException
594    {
595       Object [] o = new Object [5];
596       o[0] = arg0;
597       o[1] = arg1;
598       o[2] = arg2;
599       o[3] = arg3;
600       o[4] = arg4;
601       return getMessage(caller, BASE_NAME, null, key, o);
602    }
603
604
605    /**
606     * Get a message from resource.properties from the package of the given object.
607     *
608     * @param caller The calling object, used to get the package name and class loader
609     * @param key The resource key
610     * @param array An array of objects to place in corresponding variables
611     * @return The formatted message
612     */
613    public static String getString(Object caller, String key, Object [] args)
614            throws MissingResourceException
615    {
616       return getMessage(caller, BASE_NAME, null, key, args);
617    }
618
619
620    /**
621     * Get a message from resource.properties from the package of the given object.
622     *
623     * @param caller The calling object, used to get the package name and class loader
624     * @param locale The locale
625     * @param key The resource key
626     * @return The formatted message
627     */
628    public static String getString(Object caller, Locale locale, String key)
629            throws MissingResourceException
630    {
631       return getMessage(caller, BASE_NAME, locale, key, null);
632    }
633
634    /**
635     * Get a message from resource.properties from the package of the given object.
636     *
637     * @param caller The calling object, used to get the package name and class loader
638     * @param locale The locale
639     * @param key The resource key
640     * @param arg0 The argument to place in variable {0}
641     * @return The formatted message
642     */
643    public static String getString(Object caller, Locale locale, String key, Object arg0)
644            throws MissingResourceException
645    {
646       Object [] o = new Object [1];
647       o[0] = arg0;
648       return getMessage(caller, BASE_NAME, locale, key, o);
649    }
650
651    /**
652     * Get a message from resource.properties from the package of the given object.
653     *
654     * @param caller The calling object, used to get the package name and class loader
655     * @param locale The locale
656     * @param key The resource key
657     * @param arg0 The argument to place in variable {0}
658     * @param arg1 The argument to place in variable {1}
659     * @return The formatted message
660     */
661    public static String getString(Object caller, Locale locale, String key, Object arg0, Object arg1)
662            throws MissingResourceException
663    {
664       Object [] o = new Object [2];
665       o[0] = arg0;
666       o[1] = arg1;
667       return getMessage(caller, BASE_NAME, locale, key, o);
668    }
669
670    /**
671     * Get a message from resource.properties from the package of the given object.
672     *
673     * @param caller The calling object, used to get the package name and class loader
674     * @param locale The locale
675     * @param key The resource key
676     * @param arg0 The argument to place in variable {0}
677     * @param arg1 The argument to place in variable {1}
678     * @param arg2 The argument to place in variable {2}
679     * @return The formatted message
680     */
681    public static String getString(Object caller, Locale locale, String key, Object arg0, Object arg1, Object arg2)
682            throws MissingResourceException
683    {
684       Object [] o = new Object [3];
685       o[0] = arg0;
686       o[1] = arg1;
687       o[2] = arg2;
688       return getMessage(caller, BASE_NAME, locale, key, o);
689    }
690
691    /**
692     * Get a message from resource.properties from the package of the given object.
693     *
694     * @param caller The calling object, used to get the package name and class loader
695     * @param locale The locale
696     * @param key The resource key
697     * @param arg0 The argument to place in variable {0}
698     * @param arg1 The argument to place in variable {1}
699     * @param arg2 The argument to place in variable {2}
700     * @param arg3 The argument to place in variable {3}
701     * @return The formatted message
702     */
703    public static String getString(Object caller, Locale locale, String key, Object arg0, Object arg1, Object arg2, Object arg3)
704            throws MissingResourceException
705    {
706       Object [] o = new Object [4];
707       o[0] = arg0;
708       o[1] = arg1;
709       o[2] = arg2;
710       o[3] = arg3;
711       return getMessage(caller, BASE_NAME, locale, key, o);
712    }
713
714    /**
715     * Get a message from resource.properties from the package of the given object.
716     *
717     * @param caller The calling object, used to get the package name and class loader
718     * @param locale The locale
719     * @param key The resource key
720     * @param arg0 The argument to place in variable {0}
721     * @param arg1 The argument to place in variable {1}
722     * @param arg2 The argument to place in variable {2}
723     * @param arg3 The argument to place in variable {3}
724     * @return The formatted message
725     */
726    public static String getString(Object caller, Locale locale, String key, Object arg0, Object arg1, Object arg2, Object arg3, Object arg4)
727            throws MissingResourceException
728    {
729       Object [] o = new Object [5];
730       o[0] = arg0;
731       o[1] = arg1;
732       o[2] = arg2;
733       o[3] = arg3;
734       o[4] = arg4;
735       return getMessage(caller, BASE_NAME, locale, key, o);
736    }
737
738    /**
739     * Get a message from resource.properties from the package of the given object.
740     *
741     * @param caller The calling object, used to get the package name and class loader
742     * @param locale The locale
743     * @param key The resource key
744     * @param array An array of objects to place in corresponding variables
745     * @return The formatted message
746     */
747    public static String getString(Object caller, Locale locale, String key, Object [] args)
748            throws MissingResourceException
749    {
750       return getMessage(caller, BASE_NAME, locale, key, args);
751    }
752
753    // Workhorse that does the resource loading and key lookup
754 public static String getMessage(Object caller, String basename, Locale locale, String key,
755                                    Object [] args)
756            throws MissingResourceException
757    {
758       String msg = null;
759       MissingResourceException firstEx = null;
760       String fullName = null;
761       Class curClass = null;
762       boolean didNull = false;
763
764       if (caller != null)
765       {
766          if (caller instanceof Class )
767             curClass = (Class )caller;
768          else
769             curClass = caller.getClass();
770       }
771
772       while (msg == null)
773       {
774
775          // Get the full name of the resource
776 if (curClass != null)
777          {
778
779             // Create the full basename
780 String pkgName = curClass.getName();
781
782             int pos = pkgName.lastIndexOf(".");
783             if (pos > 0)
784             {
785                fullName = pkgName.substring(0, pos + 1).replace('.', '/') + basename;
786             }
787             else
788             {
789                fullName = basename;
790             }
791          }
792          else
793          {
794             fullName = basename;
795          }
796
797          try
798          {
799             RB rb = new RB(caller, fullName, locale);
800             msg = rb.getString(key, args);
801          }
802          catch (MissingResourceException ex)
803          {
804             if (curClass == null)
805             {
806                throw ex;
807             }
808
809             // Save the first exception
810 if (firstEx == null)
811             {
812                firstEx = ex;
813             }
814
815             // Get the superclass
816 curClass = curClass.getSuperclass();
817             if (curClass == null)
818             {
819                if (didNull)
820                   throw firstEx;
821                didNull = true;
822                caller = null;
823             }
824             else
825             {
826                String cname = curClass.getName();
827                if (cname.startsWith("java.") ||
828                        cname.startsWith("javax."))
829                {
830                   if (didNull)
831                      throw firstEx;
832                   didNull = true;
833                   caller = null;
834                   curClass = null;
835                }
836             }
837          }
838
839       }
840       return msg;
841    }
842
843    /**
844     * Clears the internal cache
845     */
846    public static void clearCache()
847    {
848       propertyCache.clear();
849    }
850 }
851

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