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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/* $Rev$ $Date$ */
/**
* Catalog component implementation.
*/
#include "string.hpp"
#include "function.hpp"
#include "list.hpp"
#include "value.hpp"
#include "monad.hpp"
namespace tuscany {
namespace store {
/**
* Returns the catalog.
*/
struct convert {
const lambda<value(const list<value>&)> converter;
const string currency;
convert(const lambda<value(const list<value>&)>& converter, const string& currency) : converter(converter), currency(currency) {
}
const value operator()(const value& price) const {
return converter(mklist<value>("convert", string("USD"), currency, price));
}
};
const list<value> mkfruit(const string& name, const string& code, const string& symbol, const double price) {
return list<value>() +
mklist<value>("name", name) + mklist<value>("currencyCode", code) + mklist<value>("currencySymbol", symbol) + mklist<value>("price", price);
}
const failable<value> items(const lambda<value(const list<value>&)> converter, const lambda<value(const list<value>&)> currencyCode) {
const string currency(currencyCode(list<value>()));
const string symbol(converter(mklist<value>("symbol", currency)));
const lambda<value(const value&)> conv(convert(converter, currency));
return value(list<value>() +
mkfruit("Apple", currency, symbol, conv(2.99)) +
mkfruit("Orange", currency, symbol, conv(3.55)) +
mkfruit("Pear", currency, symbol, conv(1.55)));
}
}
}
extern "C" {
const tuscany::value apply(const tuscany::list<tuscany::value>& params) {
const tuscany::value func(car(params));
if (func == "items")
return tuscany::store::items(cadr(params), caddr(params));
return tuscany::mkfailure<tuscany::value>();
}
}
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