/*
*******************************************************************************
* Copyright (C) 2002-2008, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
package com.ibm.icu.text;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import java.util.MissingResourceException;
import com.ibm.icu.impl.ICUData;
import com.ibm.icu.impl.ICULocaleService;
import com.ibm.icu.impl.ICUResourceBundle;
import com.ibm.icu.impl.ICUService;
import com.ibm.icu.impl.ICUService.Factory;
import com.ibm.icu.util.ULocale;
import com.ibm.icu.util.UResourceBundle;
import com.ibm.icu.impl.Assert;
/**
* @author Ram
*
* To change this generated comment edit the template variable "typecomment":
* Window>Preferences>Java>Templates.
* To enable and disable the creation of type comments go to
* Window>Preferences>Java>Code Generation.
*/
final class BreakIteratorFactory extends BreakIterator.BreakIteratorServiceShim {
public Object registerInstance(BreakIterator iter, ULocale locale, int kind) {
iter.setText(new java.text.StringCharacterIterator(""));
return service.registerObject(iter, locale, kind);
}
public boolean unregister(Object key) {
if (service.isDefault()) {
return false;
}
return service.unregisterFactory((Factory)key);
}
public Locale[] getAvailableLocales() {
if (service == null) {
return ICUResourceBundle.getAvailableLocales(ICUResourceBundle.ICU_BASE_NAME);
} else {
return service.getAvailableLocales();
}
}
public ULocale[] getAvailableULocales() {
if (service == null) {
return ICUResourceBundle.getAvailableULocales(ICUResourceBundle.ICU_BASE_NAME);
} else {
return service.getAvailableULocales();
}
}
public BreakIterator createBreakIterator(ULocale locale, int kind) {
// TODO: convert to ULocale when service switches over
if (service.isDefault()) {
return createBreakInstance(locale, kind);
}
ULocale[] actualLoc = new ULocale[1];
BreakIterator iter = (BreakIterator)service.get(locale, kind, actualLoc);
iter.setLocale(actualLoc[0], actualLoc[0]); // services make no distinction between actual & valid
return iter;
}
private static class BFService extends ICULocaleService {
BFService() {
super("BreakIterator");
class RBBreakIteratorFactory extends ICUResourceBundleFactory {
protected Object handleCreate(ULocale loc, int kind, ICUService srvc) {
return createBreakInstance(loc, kind);
}
}
registerFactory(new RBBreakIteratorFactory());
markDefault();
}
}
static final ICULocaleService service = new BFService();
/** KIND_NAMES are the resource key to be used to fetch the name of the
* pre-compiled break rules. The resource bundle name is "boundaries".
* The value for each key will be the rules to be used for the
* specified locale - "word" -> "word_th" for Thai, for example.
* DICTIONARY_POSSIBLE indexes in the same way, and indicates whether a
* dictionary is a possibility for that type of break. This is just
* an optimization to avoid a resource lookup where no dictionary is
* ever possible.
* @internal
*/
private static final String[] KIND_NAMES = {
"grapheme", "word", "line", "sentence", "title"
};
private static final boolean[] DICTIONARY_POSSIBLE = {
false, true, true, false, false
};
private static BreakIterator createBreakInstance(ULocale locale, int kind) {
BreakIterator iter = null;
ICUResourceBundle rb = (ICUResourceBundle)UResourceBundle.getBundleInstance(ICUResourceBundle.ICU_BRKITR_BASE_NAME, locale);
//
// Get the binary rules. These are needed for both normal RulesBasedBreakIterators
// and for Dictionary iterators.
//
InputStream ruleStream = null;
try {
String typeKey = KIND_NAMES[kind];
String brkfname = rb.getStringWithFallback("boundaries/" + typeKey);
String rulesFileName = ICUResourceBundle.ICU_BUNDLE +ICUResourceBundle.ICU_BRKITR_NAME+ "/" + brkfname;
ruleStream = ICUData.getStream(rulesFileName);
}
catch (Exception e) {
throw new MissingResourceException(e.toString(),"","");
}
//
// Check whether a dictionary exists, and create a DBBI iterator is
// one does.
//
if (DICTIONARY_POSSIBLE[kind]) {
// This type of break iterator could potentially use a dictionary.
//
try {
if (locale.getLanguage().equals("th")){
// If the language is Thai, load the thai compact trie dictionary.
String dictType = "Thai";
String dictFileName = rb.getStringWithFallback("dictionaries/" + dictType);
dictFileName = ICUResourceBundle.ICU_BUNDLE +ICUResourceBundle.ICU_BRKITR_NAME+ "/" + dictFileName;
InputStream is = ICUData.getStream(dictFileName);
iter = new ThaiBreakIterator(ruleStream, is);
}
} catch (MissingResourceException e) {
// Couldn't find a dictionary.
// This is normal, and will occur whenever creating a word or line
// break iterator for a locale that does not have a BreakDictionaryData
// resource - meaning for all but Thai.
// Fall through to creating a normal RulebasedBreakIterator.
} catch (IOException e) {
Assert.fail(e);
}
}
if (iter == null) {
//
// Create a normal RuleBasedBreakIterator.
// We have determined that this is not supposed to be a dictionary iterator.
//
try {
iter = RuleBasedBreakIterator.getInstanceFromCompiledRules(ruleStream);
}
catch (IOException e) {
// Shouldn't be possible to get here.
// If it happens, the compiled rules are probably corrupted in some way.
Assert.fail(e);
}
}
// TODO: Determine valid and actual locale correctly.
ULocale uloc = ULocale.forLocale(rb.getLocale());
iter.setLocale(uloc, uloc);
return iter;
}
}