com.qdeve.oilprice.configuration.GsonMoneyTypeAdapter.java Source code

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Here is the source code for com.qdeve.oilprice.configuration.GsonMoneyTypeAdapter.java

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/**************************************************************************
 * (C) Copyright 2016 QDEVE Roman Krysinski.
 *
 * 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.qdeve.oilprice.configuration;

import java.io.IOException;

import org.javamoney.moneta.Money;

import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;
import com.qdeve.oilprice.util.MonetaryUtils;

/**
 * Custom GSON adapter for {@link Money} type.
 *
 * @author Roman Krysinski
 */
public class GsonMoneyTypeAdapter extends TypeAdapter<Money> {
    public static final String CURRENTY_TAG = "currency";
    public static final String PRICE_TAG = "value";

    @Override
    public void write(JsonWriter out, Money value) throws IOException {
        out.beginObject();
        out.name(CURRENTY_TAG).value(MonetaryUtils.getCurrencyFrom(value));
        out.name(PRICE_TAG).value(MonetaryUtils.getBigDecimalFrom(value));
        out.endObject();
    }

    @Override
    public Money read(JsonReader in) throws IOException {
        String currency = null;
        Double price = null;
        in.beginObject();
        while (in.hasNext()) {
            switch (in.nextName()) {
            case CURRENTY_TAG:
                currency = in.nextString();
                break;
            case PRICE_TAG:
                price = in.nextDouble();
                break;
            }
        }
        in.endObject();
        return MonetaryUtils.newMoneyFrom(price, currency);
    }

}