it.newfammulfin.api.util.converters.MoneyConverter.java Source code

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Here is the source code for it.newfammulfin.api.util.converters.MoneyConverter.java

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package it.newfammulfin.api.util.converters;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import java.lang.reflect.Type;
import org.joda.money.CurrencyUnit;
import org.joda.money.Money;

/**
 *
 * @author eric
 */
public class MoneyConverter implements JsonSerializer<Money>, JsonDeserializer<Money> {

    private final static String VALUE_FIELD = "value";
    private final static String CURRENCY_FIELD = "currency";

    @Override
    public JsonElement serialize(Money money, Type type, JsonSerializationContext jsc) {
        JsonObject jsonObject = new JsonObject();
        jsonObject.add(VALUE_FIELD, new JsonPrimitive(money.getAmount()));
        jsonObject.add(CURRENCY_FIELD, new JsonPrimitive(money.getCurrencyUnit().getCurrencyCode()));
        return jsonObject;
    }

    @Override
    public Money deserialize(JsonElement jsonElement, Type type, JsonDeserializationContext jdc)
            throws JsonParseException {
        if (!(jsonElement instanceof JsonObject)) {
            throw new JsonParseException("Json object expected");
        }
        JsonObject jsonObject = (JsonObject) jsonElement;
        if (!jsonObject.has(VALUE_FIELD) || !jsonObject.has(CURRENCY_FIELD)) {
            throw new JsonParseException(
                    "Fields missing (expected " + VALUE_FIELD + " and " + CURRENCY_FIELD + ")");
        }
        Money money = Money.of(CurrencyUnit.getInstance(jsonObject.get(CURRENCY_FIELD).getAsString()),
                jsonObject.get(VALUE_FIELD).getAsDouble());
        return money;
    }

}