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 * CREDIT SUISSE IS WILLING TO LICENSE THIS SPECIFICATION TO YOU ONLY UPON THE
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 * BUTTON AT THE BOTTOM OF THIS PAGE.
 *
 * Specification: JSR-354 Money and Currency API ("Specification")
 *
 * Copyright (c) 2012-2013, Credit Suisse All rights reserved.
 */
package javax.money;

import javax.money.spi.Bootstrap;
import javax.money.spi.CurrencyProviderSpi;
import javax.money.spi.MonetaryCurrenciesSingletonSpi;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

Factory singleton for CurrencyUnit instances as provided by the different registered CurrencyProviderSpi instances. 

This class is thread safe.
Author:
Anatole Tresch
Version:
0.8/**
 * Factory singleton for {@link CurrencyUnit} instances as provided by the
 * different registered {@link javax.money.spi.CurrencyProviderSpi} instances.
 * <p/>
 * This class is thread safe.
 *
 * @author Anatole Tresch
 * @version 0.8
 */
final class DefaultMonetaryCurrenciesSingletonSpi implements MonetaryCurrenciesSingletonSpi {

    @Override
    public Set<CurrencyUnit> getCurrencies(CurrencyQuery query) {
        Set<CurrencyUnit> result = new HashSet<>();
        for (CurrencyProviderSpi spi : Bootstrap.getServices(CurrencyProviderSpi.class)) {
            try {
                result.addAll(spi.getCurrencies(query));
            } catch (Exception e) {
                Logger.getLogger(DefaultMonetaryCurrenciesSingletonSpi.class.getName())
                        .log(Level.SEVERE, "Error loading currency provider names for " + spi.getClass().getName(),
                                e);
            }
        }
        return result;
    }

    
This default implementation simply returns all providers defined in arbitrary order.
Returns:
the default provider chain, never null./**
     * This default implementation simply returns all providers defined in arbitrary order.
     *
     * @return the default provider chain, never null.
     */
    @Override
    public List<String> getDefaultProviderChain() {
        List<String> list = new ArrayList<>();
        list.addAll(getProviderNames());
        Collections.sort(list);
        return list;
    }

    
Get the names of the currently loaded providers.
Returns:
the names of the currently loaded providers, never null./**
     * Get the names of the currently loaded providers.
     *
     * @return the names of the currently loaded providers, never null.
     */
    @Override
    public Set<String> getProviderNames() {
        Set<String> result = new HashSet<>();
        for (CurrencyProviderSpi spi : Bootstrap.getServices(CurrencyProviderSpi.class)) {
            try {
                result.add(spi.getProviderName());
            } catch (Exception e) {
                Logger.getLogger(DefaultMonetaryCurrenciesSingletonSpi.class.getName())
                        .log(Level.SEVERE, "Error loading currency provider names for " + spi.getClass().getName(),
                                e);
            }
        }
        return result;
    }

}