From 2ca14246638d3b0599dd34825f8b024467eb30f2 Mon Sep 17 00:00:00 2001
From: Jens Luedicke <jens.luedicke@gmail.com>
Date: Wed, 8 Sep 2010 23:29:37 +0200
Subject: [PATCH] Initial commit.

---
 settable.hpp | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 settable.hpp

diff --git a/settable.hpp b/settable.hpp
new file mode 100644
index 0000000..683d3cd
--- /dev/null
+++ b/settable.hpp
@@ -0,0 +1,62 @@
+#ifndef SETTABLE_HPP
+#define SETTABLE_HPP
+
+#include <map>
+#include <string>
+
+#include <boost/shared_ptr.hpp>
+
+namespace settable {
+    namespace setter {
+        namespace string2type {
+            namespace helper {
+                template <typename T>
+                T convert(const std::string &value);
+            }
+        }
+
+        class abstract_setter {
+        public:
+            virtual void operator=(const std::string &value) = 0;
+        };
+
+        template <typename T>
+        class setter : public abstract_setter {
+        public:
+            setter(void *p) : ptr(p) {
+                BOOST_ASSERT(ptr != 0);
+            }
+            
+            virtual void operator=(const std::string &value) {
+                T *ptrT = static_cast<T*>(ptr);
+                BOOST_ASSERT(ptrT != 0);
+
+                *ptrT = string2type::helper::convert<T>(value);
+            }
+
+            void *ptr;
+        };
+    }
+
+    class settable {
+    public:
+        void set_attribute(const std::string &attr, const std::string &value) {
+            boost::shared_ptr<setter::abstract_setter> setter = setters[attr];
+            
+            if (setter) {
+                *setter = value;
+            }
+        }
+
+        template <typename T>
+        void register_setter(const std::string &name, void *ptr) {
+            setters.insert(std::make_pair(name, boost::shared_ptr<setter::abstract_setter>(new setter::setter<T>(ptr))));
+        }
+
+    private:
+        std::map< std::string, boost::shared_ptr<setter::abstract_setter> > setters;
+    };
+}
+
+#endif /* SETTABLE_HPP */
+