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JSR 354 provides an API for representing, transporting, and performing comprehensive calculations with Money and Currency. This module implements JSR 354.

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/*
  Copyright (c) 2012, 2014, Credit Suisse (Anatole Tresch), Werner Keil and others by the @author tag.

  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 org.javamoney.moneta.function;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import javax.money.CurrencyUnit;

/**
 * This statisticsMap is decorator of HashMap that returns an empty Summary when there
 * isn't currency in get's method
 *
 * @author otaviojava
 */
class MonetarySummaryMap implements
        Map {


    private final Map map = new HashMap<>();

    @Override
    public int size() {
        return map.size();
    }

    @Override
    public boolean isEmpty() {
        return map.isEmpty();
    }

    @Override
    public boolean containsKey(Object key) {
        return map.containsKey(key);
    }

    @Override
    public boolean containsValue(Object value) {
        return map.containsValue(value);
    }

    @Override
    public MonetarySummaryStatistics get(Object key) {
        if (CurrencyUnit.class.isInstance(key)) {
            CurrencyUnit unit = CurrencyUnit.class.cast(key);
            MonetarySummaryStatistics stats = map.get(key);
            if(stats==null){
                stats = new DefaultMonetarySummaryStatistics(unit);
                map.put(unit, stats);
            }
            return stats;
        }
        return map.get(key);
    }

    @Override
    public MonetarySummaryStatistics put(CurrencyUnit key,
                                         MonetarySummaryStatistics value) {
        return map.put(key, value);
    }

    @Override
    public MonetarySummaryStatistics remove(Object key) {
        return map.remove(key);
    }

    @Override
    public void putAll(
            Map m) {
        map.putAll(m);
    }

    @Override
    public void clear() {
        map.clear();
    }

    @Override
    public Set keySet() {
        return map.keySet();
    }

    @Override
    public Collection values() {
        return map.values();
    }

    @Override
    public Set> entrySet() {
        return map.entrySet();
    }

    @Override
    public boolean equals(Object obj) {
        if (MonetarySummaryMap.class.isInstance(obj)) {
            MonetarySummaryMap other = MonetarySummaryMap.class.cast(obj);
            return map.equals(other.map);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return map.hashCode();
    }

    @Override
    public String toString() {
        return "MonetarySummaryMap: " + map.toString();
    }
}