Examples of com.ibm.icu.util.UResourceBundle

com.ibm.icu.util.UResourceBundle
e.icu-project.org/repos/icu/icuhtml/trunk/design/bnf_rb.txt">BNF definition. More on resource bundle concepts and syntax can be found in the Users Guide.
The packaging of ICU *.res files can be of two types ICU4C:
```
 root.res | -------- |        | fr.res  en.res | -------- |        | fr_CA.res fr_FR.res 
```
JAVA/JDK:
```
 LocaleElements.res | ------------------- |                   | LocaleElements_fr.res  LocaleElements_en.res | --------------------------- |                            | LocaleElements_fr_CA.res   LocaleElements_fr_FR.res 
```
Depending on the organization of your resources, the syntax to getBundleInstance will change. To open ICU style organization use:
```
 UResourceBundle bundle = UResourceBundle.getBundleInstance("com/mycompany/resources", "en_US", myClassLoader); 
```
To open Java/JDK style organization use:
```
 UResourceBundle bundle = UResourceBundle.getBundleInstance("com.mycompany.resources.LocaleElements", "en_US", myClassLoader); 
```
Please use pass a class loader for loading non-ICU resources. Java security does not allow loading of resources across jar files. You must provide your class loader to load the resources @stable ICU 3.0 @author ram

    /** 
     * Load the Date string array
     */
    private synchronized void loadDates() {
        CalendarData calData = new CalendarData(fLocale, calendar.getType());
        UResourceBundle rb = calData.get("fields", "day", "relative");
        
        Set<URelativeString> datesSet = new TreeSet<URelativeString>(new Comparator<URelativeString>() { 
            public int compare(URelativeString r1, URelativeString r2) {
                
                if(r1.offset == r2.offset) {
                    return 0;
                } else if(r1.offset < r2.offset) {
                    return -1;
                } else {
                    return 1;
                }
            }
        }) ;
        
        for(UResourceBundleIterator i = rb.getIterator();i.hasNext();) {
            UResourceBundle line = i.next();
            
            String k = line.getKey();
            String v = line.getString();
            URelativeString rs = new URelativeString(k,v);
            datesSet.add(rs);
        }
        fDates = datesSet.toArray(new URelativeString[0]);
    }

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            resDepth = 0;
            // determine in which locale (if any) the named resource is located
            do {
                try {
                    ICUResourceBundle irb = (ICUResourceBundle)r.get(resName);
                    UResourceBundle urb = irb.get(kwVal);


                    // if we didn't fail before this..
                    fullBase = r.getULocale();


                    // If the fetched item (urb) is in a different locale than our outer locale (r/fullBase)
                    // then we are in a 'fallback' situation. treat as a missing resource situation.
                    if(!fullBase.toString().equals(urb.getLocale().toString())) {
                        fullBase = null; // fallback condition. Loop and try again.
                    }


                    // If we fell back to an ancestor of the old 'default',
                    // we need to re calculate the "default" keyword.

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        ULocale locales[] = createULocaleList(baseName, ICU_DATA_CLASS_LOADER);
        int i;


        for (i = 0; i < locales.length; i++) {
            try {
                UResourceBundle b = UResourceBundle.getBundleInstance(baseName, locales[i]);
                // downcast to ICUResourceBundle?
                ICUResourceBundle irb = (ICUResourceBundle) (b.getObject(keyword));
                Enumeration<String> e = irb.getKeys();
                while (e.hasMoreElements()) {
                    String s = e.nextElement();
                    if (!DEFAULT_TAG.equals(s)) {
                        // don't add 'default' items

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        return false;
    }
    // This method is for super class's instantiateBundle method
    public static UResourceBundle getBundleInstance(String baseName, String localeID,
                                                    ClassLoader root, boolean disableFallback){
        UResourceBundle b = instantiateBundle(baseName, localeID, root, disableFallback);
        if(b==null){
            throw new MissingResourceException("Could not find the bundle "+ baseName+"/"+ localeID+".res","","");
        }
        return b;
    }

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                            b.setLoadingStatus(ICUResourceBundle.FROM_ROOT);
                        }
                    }
                }
            }else{
                UResourceBundle parent = null;
                localeName = b.getLocaleID();
                int i = localeName.lastIndexOf('_');


                b = (ICUResourceBundle)addToCache(root, fullName, defaultLocale, b);

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        bundle.loader = loader;
        if(bundle.reader.getUsesPoolBundle()) {
            bundle.reader.setPoolBundleKeys(
                ((ICUResourceBundleImpl)getBundleInstance(baseName, "pool", loader, true)).reader);
        }
        UResourceBundle alias = bundle.handleGetImpl("%%ALIAS", null, bundle, null, null); // handleGet will cache the bundle with no parent set
        if(alias != null) {
            return (ICUResourceBundle)UResourceBundle.getBundleInstance(baseName, alias.getString());
        } else {
            return bundle;
        }
    }

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    protected void createLookupCache() {
        lookup = new SimpleCache<Object, UResourceBundle>(ICUCache.WEAK, Math.max(getSize()*2, MAX_INITIAL_LOOKUP_SIZE));
    }


    protected UResourceBundle handleGet(String resKey, HashMap<String, String> table, UResourceBundle requested) {
        UResourceBundle res = null;
        if (lookup != null) {
            res = lookup.get(resKey);
        }
        if (res == null) {
            int[] index = new int[1];

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        }
        return res;
    }


    protected UResourceBundle handleGet(int index, HashMap<String, String> table, UResourceBundle requested) {
        UResourceBundle res = null;
        Integer indexKey = null;
        if (lookup != null) {
            indexKey = Integer.valueOf(index);
            res = lookup.get(indexKey);
        }
        if (res == null) {
            boolean[] alias = new boolean[1];
            res = handleGetImpl(index, table, requested, alias);
            if (res != null && lookup != null && !alias[0]) {
                // We do not want to cache a result from alias entry
                lookup.put(res.getKey(), res);
                lookup.put(indexKey, res);
            }
        }
        return res;
    }

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    public String[] getDateTimePatterns(){
        ICUResourceBundle bundle = get("DateTimePatterns");
        ArrayList<String> list = new ArrayList<String>();
        UResourceBundleIterator iter = bundle.getIterator();
        while (iter.hasNext()) {
            UResourceBundle patResource = iter.next();
            int resourceType = patResource.getType();
            switch (resourceType) {
                case UResourceBundle.STRING:
                    list.add(patResource.getString());
                    break;
                case UResourceBundle.ARRAY:
                    String[] items = patResource.getStringArray();
                    list.add(items[0]);
                    break;
            }
        }

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    public String[] getOverrides(){
        ICUResourceBundle bundle = get("DateTimePatterns");
        ArrayList<String> list = new ArrayList<String>();
        UResourceBundleIterator iter = bundle.getIterator();
        while (iter.hasNext()) {
            UResourceBundle patResource = iter.next();
            int resourceType = patResource.getType();
            switch (resourceType) {
                case UResourceBundle.STRING:
                    list.add(null);
                    break;
                case UResourceBundle.ARRAY:
                    String[] items = patResource.getStringArray();
                    list.add(items[1]);
                    break;
            }
        }
        return list.toArray(new String[list.size()]);

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