Allow building a configuration from an option list

include/cppkafka/configuration_option.h

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2016, Matias Fontanini
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following disclaimer
+ *   in the documentation and/or other materials provided with the
+ *   distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef CPPKAFKA_CONFIGURATION_OPTION_H
+#define CPPKAFKA_CONFIGURATION_OPTION_H
+
+#include <string>
+#include <type_traits>
+
+namespace cppkafka {
+
+/**
+ * Wrapper over a configuration (key, value) pair
+ */
+class ConfigurationOption {
+public:
+    /**
+     * Construct using a std::string value
+     */
+    ConfigurationOption(const std::string& key, const std::string& value);
+    
+    /**
+     * Construct using a const char* value
+     */
+    ConfigurationOption(const std::string& key, const char* value);
+    
+    /**
+     * Construct using a bool value
+     */
+    ConfigurationOption(const std::string& key, bool value);
+
+    /**
+     * Construct using any integral value
+     */
+    template <typename T,
+              typename = typename std::enable_if<std::is_integral<T>::value>::type>
+    ConfigurationOption(const std::string& key, T value)
+    : ConfigurationOption(key, std::to_string(value)) {
+
+    }
+
+    /**
+     * Gets the key
+     */
+    const std::string& get_key() const;
+
+    /**
+     * Gets the value
+     */
+    const std::string& get_value() const;
+private:
+    std::string key_;
+    std::string value_;
+};
+
+} // cppkafka
+
+#endif // CPPKAFKA_CONFIGURATION_OPTION_H