tidy up PropertyHolder

[simgrid.git] / src / xbt / PropertyHolder.cpp

diff --git a/src/xbt/PropertyHolder.cpp b/src/xbt/PropertyHolder.cpp
new file mode 100644 (file)
index 0000000..8b62106
--- /dev/null
+++ b/src/xbt/PropertyHolder.cpp
@@ -0,0 +1,56 @@
+/* Copyright (c) 2015-2019. The SimGrid Team. All rights reserved.          */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include <xbt/PropertyHolder.hpp>
+
+#include <map>
+
+namespace simgrid {
+namespace xbt {
+
+/** @brief Return the property associated to the provided key (or nullptr if not existing) */
+const char* PropertyHolder::get_property(const std::string& key) const
+{
+  if (not properties_)
+    return nullptr;
+  auto prop = properties_->find(key);
+  return prop == properties_->end() ? nullptr : prop->second.c_str();
+}
+
+/** @brief Change the value of a given key in the property set */
+void PropertyHolder::set_property(const std::string& key, const std::string& value)
+{
+  if (not properties_)
+    properties_.reset(new std::unordered_map<std::string, std::string>);
+  (*properties_)[key] = value;
+}
+
+/** @brief Return the whole set of properties. Don't mess with it, dude! */
+const std::unordered_map<std::string, std::string>* PropertyHolder::get_properties()
+{
+  if (not properties_)
+    properties_.reset(new std::unordered_map<std::string, std::string>);
+  return properties_.get();
+}
+
+/** @brief Change the value of the given keys in the property set */
+template <class Assoc> void PropertyHolder::set_properties(const Assoc& properties)
+{
+  if (not properties_)
+    properties_.reset(new std::unordered_map<std::string, std::string>);
+  std::unordered_map<std::string, std::string> props(properties.cbegin(), properties.cend());
+#if __cplusplus >= 201703L
+  props.merge(properties_);
+#else
+  props.insert(properties_->cbegin(), properties_->cend());
+#endif
+  properties_->swap(props);
+}
+
+template void PropertyHolder::set_properties(const std::map<std::string, std::string>& properties);
+template void PropertyHolder::set_properties(const std::unordered_map<std::string, std::string>& properties);
+
+} // namespace xbt
+} // namespace simgrid