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/*
* SPDX-FileCopyrightText: Copyright 2021 Arm Limited and/or its affiliates <open-source-office@arm.com>
* SPDX-License-Identifier: Apache-2.0
*
* 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.
*/
#ifndef APP_CTX_HPP
#define APP_CTX_HPP
#include <string>
#include <map>
namespace arm {
namespace app {
class IAttribute
{
public:
virtual ~IAttribute() = default;
};
template<typename T>
class Attribute : public IAttribute
{
public:
~Attribute() override = default;
explicit Attribute(const T value): m_value(value){}
T Get()
{
return m_value;
}
private:
T m_value;
};
/* Application context class */
class ApplicationContext {
public:
/**
* @brief Saves given value as a named attribute in the context.
* @tparam T value type.
* @param[in] name Context attribute name.
* @param[in] object Value to save in the context.
*/
template<typename T>
void Set(const std::string &name, T object)
{
/* check if we have already the attribute allocated. */
if( true == this->Has(name) ){
//delete its value
delete this->m_attributes[name];
}
/* allocate new value */
this->m_attributes[name] = new Attribute<T>(object);
}
/**
* @brief Gets the saved attribute from the context by the given name.
* @tparam T value type.
* @param[in] name Context attribute name.
* @return Value saved in the context.
*/
template<typename T>
T Get(const std::string &name)
{
auto a = (Attribute<T>*)m_attributes[name];
return a->Get();
}
/**
* @brief Checks if an attribute for a given name exists in the context.
* @param[in] name Attribute name.
* @return true if attribute exists, false otherwise
*/
bool Has(const std::string& name)
{
return m_attributes.find(name) != m_attributes.end();
}
ApplicationContext() = default;
~ApplicationContext() {
for (auto& attribute : m_attributes)
delete attribute.second;
this->m_attributes.clear();
}
private:
std::map<std::string, IAttribute*> m_attributes;
};
} /* namespace app */
} /* namespace arm */
#endif /* APP_CTX_HPP */
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