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/*
* Copyright 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.i18n.client;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.i18n.client.impl.CurrencyDataImpl;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
/**
* Generated class containing all the CurrencyImpl instances. This is just
* the fallback in case the I18N module is not included.
*/
public class CurrencyList implements Iterable {
/**
* Inner class to avoid CurrencyList.clinit calls and allow this to be
* completely removed from the generated code if instance isn't referenced
* (such as when all you call is CurrencyList.get().getDefault() ).
*/
private static class CurrencyListInstance {
private static CurrencyList instance = GWT.create(CurrencyList.class);
}
/**
* Return the singleton instance of CurrencyList.
*/
public static CurrencyList get() {
return CurrencyListInstance.instance;
}
/**
* Add all entries in {@code override} to the original map, replacing
* any existing entries. This is used by subclasses that need to slightly
* alter the data used by the parent locale.
*/
protected static final native JavaScriptObject overrideMap(
JavaScriptObject original, JavaScriptObject override) /*-{
for (var key in override) {
if (override.hasOwnProperty(key)) {
original[key] = override[key];
}
}
return original;
}-*/;
/**
* Add currency codes contained in the map to an ArrayList.
*/
private static native void loadCurrencyValuesNative(JavaScriptObject map, ArrayList collection) /*-{
for (var key in map) {
if (map.hasOwnProperty(key)) {
[email protected]::add(Ljava/lang/Object;)(map[key]);
}
}
}-*/;
/**
* Directly reference an entry in the currency names map JSO.
*
* @param code ISO4217 currency code
* @return currency name, or the currency code if not known
*/
private static native String lookupNameNative(JavaScriptObject namesMap, String code) /*-{
return namesMap[code] || code;
}-*/;
/**
* Directly reference an entry in the currency map JSO.
*
* @param code ISO4217 currency code
* @return currency data
*/
private static native CurrencyData lookupNative(JavaScriptObject dataMap, String code) /*-{
return dataMap[code];
}-*/;
/**
* Map of currency codes to CurrencyData.
*/
protected HashMap dataMapJava;
/**
* JS map of currency codes to CurrencyData objects. Each currency code is
* assumed to be a valid JS object key.
*/
protected JavaScriptObject dataMapNative;
/**
* Map of currency codes to localized currency names. This is kept separate
* from {@link #dataMapJava} above so that the names can be completely removed by
* the compiler if they are not used.
*/
protected HashMap namesMapJava;
/**
* JS map of currency codes to localized currency names. This is kept separate
* from {@link #dataMapNative} above so that the names can be completely
* removed by the compiler if they are not used. Each currency code is assumed
* to be a valid JS object key.
*/
protected JavaScriptObject namesMapNative;
/**
* Return the default currency data for this locale.
*
* Generated implementations override this method.
*/
public CurrencyData getDefault() {
if (GWT.isScript()) {
return getDefaultNative();
} else {
return getDefaultJava();
}
}
/**
* Returns an iterator for the list of currencies.
*
* Deprecated currencies will not be included.
*/
public final Iterator iterator() {
return iterator(false);
}
/**
* Returns an iterator for the list of currencies, optionally including
* deprecated ones.
*
* @param includeDeprecated true if deprecated currencies should be included
*/
public final Iterator iterator(boolean includeDeprecated) {
ensureCurrencyMap();
ArrayList collection = new ArrayList();
if (GWT.isScript()) {
loadCurrencyValuesNative(dataMapNative, collection);
} else {
for (CurrencyData item : dataMapJava.values()) {
collection.add(item);
}
}
if (!includeDeprecated) {
ArrayList newCollection = new ArrayList();
for (CurrencyData value : collection) {
if (!value.isDeprecated()) {
newCollection.add(value);
}
}
collection = newCollection;
}
return Collections.unmodifiableList(collection).iterator();
}
/**
* Lookup a currency based on the ISO4217 currency code.
*
* @param currencyCode ISO4217 currency code
* @return currency data, or null if code not found
*/
public final CurrencyData lookup(String currencyCode) {
ensureCurrencyMap();
if (GWT.isScript()) {
return lookupNative(dataMapNative, currencyCode);
} else {
return dataMapJava.get(currencyCode);
}
}
/**
* Lookup a currency name based on the ISO4217 currency code.
*
* @param currencyCode ISO4217 currency code
* @return name of the currency, or null if code not found
*/
public final String lookupName(String currencyCode) {
ensureNamesMap();
if (GWT.isScript()) {
return lookupNameNative(namesMapNative, currencyCode);
} else {
String result = namesMapJava.get(currencyCode);
return (result == null) ? currencyCode : result;
}
}
/**
* Return the default currency data for this locale.
*
* Generated implementations override this method.
*/
protected CurrencyData getDefaultJava() {
return new CurrencyDataImpl("USD", "$", 2, "US$");
}
/**
* Return the default currency data for this locale.
*
* Generated implementations override this method.
*/
protected native CurrencyData getDefaultNative() /*-{
return [ "USD", "$", 2, "US$" ];
}-*/;
/**
* Loads the currency map.
*
* Generated implementations override this method.
*/
protected HashMap loadCurrencyMapJava() {
HashMap result = new HashMap();
result.put("USD", new CurrencyDataImpl("USD", "$", 2));
result.put("EUR", new CurrencyDataImpl("EUR", "€", 2));
result.put("GBP", new CurrencyDataImpl("GBP", "UK£", 2));
result.put("JPY", new CurrencyDataImpl("JPY", "¥", 0));
return result;
}
/**
* Loads the currency map from a JS object literal.
*
* Generated implementations override this method.
*/
protected native JavaScriptObject loadCurrencyMapNative() /*-{
return {
"USD": [ "USD", "$", 2 ],
"EUR": [ "EUR", "€", 2 ],
"GBP": [ "GBP", "UK£", 2 ],
"JPY": [ "JPY", "¥", 0 ],
};
}-*/;
/**
* Loads the currency names map.
*
* Generated implementations override this method.
*/
protected HashMap loadNamesMapJava() {
HashMap result = new HashMap();
result.put("USD", "US Dollar");
result.put("EUR", "Euro");
result.put("GBP", "British Pound Sterling");
result.put("JPY", "Japanese Yen");
return result;
}
/**
* Loads the currency names map from a JS object literal.
*
* Generated implementations override this method.
*/
protected native JavaScriptObject loadNamesMapNative() /*-{
return {
"USD": "US Dollar",
"EUR": "Euro",
"GBP": "British Pound Sterling",
"JPY": "Japanese Yen",
};
}-*/;
/**
* Ensure that the map of currency data has been initialized.
*/
private void ensureCurrencyMap() {
if (GWT.isScript()) {
if (dataMapNative == null) {
dataMapNative = loadCurrencyMapNative();
}
} else {
if (dataMapJava == null) {
dataMapJava = loadCurrencyMapJava();
}
}
}
/**
* Ensure that the map of currency data has been initialized.
*/
private void ensureNamesMap() {
if (GWT.isScript()) {
if (namesMapNative == null) {
namesMapNative = loadNamesMapNative();
}
} else {
if (namesMapJava == null) {
namesMapJava = loadNamesMapJava();
}
}
}
}