com.soomla.store.domain.data.BalanceDrivenPriceModel.java Source code

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Here is the source code for com.soomla.store.domain.data.BalanceDrivenPriceModel.java

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/*
 * Copyright (C) 2012 Soomla 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.soomla.store.domain.data;

import com.soomla.store.data.JSONConsts;
import com.soomla.store.data.StorageManager;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;

/**
 * This price model is a model that gives the associated virtual good a price according to its balance.
 * The {@link BalanceDrivenPriceModel} is provided with an ArrayList of prices which its indexes is the balances. for
 * example, the value at mCurrencyValuePerBalance[0] is the price of a specific virtual good when its balance is 0.
 */
public class BalanceDrivenPriceModel extends AbstractPriceModel {

    /** Constructor
     * A private constructor to prevent users from initializing this object with a default constructor.
     */
    private BalanceDrivenPriceModel() {
        super();

        mType = "balance";
    }

    /** Constructor
     * Creates an instance of {@link BalanceDrivenPriceModel} with the given ArrayList of prices-per-balance.
     * @param mCurrencyValuePerBalance is a given ArrayList of prices-per-balance.
     */
    public BalanceDrivenPriceModel(ArrayList<HashMap<String, Integer>> mCurrencyValuePerBalance) {
        this.mCurrencyValuePerBalance = mCurrencyValuePerBalance;
        mType = "balance";
    }

    /**
     * docs in {@link AbstractPriceModel#getCurrentPrice(VirtualGood)}.
     */
    @Override
    public HashMap<String, Integer> getCurrentPrice(VirtualGood good) {
        int balance = StorageManager.getInstance().getVirtualGoodsStorage().getBalance(good);

        // if the balance is bigger than the size of the array, return the last value in the array.
        if (balance >= mCurrencyValuePerBalance.size()) {
            return mCurrencyValuePerBalance.get(mCurrencyValuePerBalance.size() - 1);
        }

        return mCurrencyValuePerBalance.get(balance);
    }

    /**
     * docs in {@link AbstractPriceModel#toJSONObject()}
     */
    @Override
    public JSONObject toJSONObject() throws JSONException {
        JSONObject parentJsonObject = super.toJSONObject();
        JSONObject jsonObject = new JSONObject();

        Iterator<?> keys = parentJsonObject.keys();
        while (keys.hasNext()) {
            String key = (String) keys.next();
            jsonObject.put(key, parentJsonObject.get(key));
        }

        JSONArray valuesPerBalance = new JSONArray();
        for (HashMap<String, Integer> currencyValue : mCurrencyValuePerBalance) {
            JSONObject currencyValues = new JSONObject();
            for (String key : currencyValue.keySet()) {
                currencyValues.put(key, currencyValue.get(key));
            }
            valuesPerBalance.put(currencyValues);
        }
        jsonObject.put(JSONConsts.GOOD_PRICE_MODEL_VALUES, valuesPerBalance);

        return jsonObject;
    }

    /**
     * Creates a {@link BalanceDrivenPriceModel} with the given JSONObject.
     * @param jsonObject is a JSONObject representation of the required {@link BalanceDrivenPriceModel}.
     * @return an instance of {@link BalanceDrivenPriceModel}.
     * @throws JSONException
     */
    public static BalanceDrivenPriceModel fromJSONObject(JSONObject jsonObject) throws JSONException {
        JSONArray valuesPerBalanceJSON = jsonObject.getJSONArray(JSONConsts.GOOD_PRICE_MODEL_VALUES);
        ArrayList<HashMap<String, Integer>> valuesPerBalance = new ArrayList<HashMap<String, Integer>>(
                valuesPerBalanceJSON.length());
        for (int i = 0; i < valuesPerBalanceJSON.length(); i++) {
            JSONObject valuesJSON = valuesPerBalanceJSON.getJSONObject(i);
            Iterator<?> valuesKeys = valuesJSON.keys();
            HashMap<String, Integer> values = new HashMap<String, Integer>();
            while (valuesKeys.hasNext()) {
                String key = (String) valuesKeys.next();
                values.put(key, valuesJSON.getInt(key));
            }

            valuesPerBalance.add(i, values);
        }

        return new BalanceDrivenPriceModel(valuesPerBalance);
    }

    /** Private Members **/

    private ArrayList<HashMap<String, Integer>> mCurrencyValuePerBalance;
}