allow stepSizeHint to be set through SSP

Author: markaren

src/ecos/ssp/ssp.cpp

@@ -149,7 +149,15 @@ Component parse_component(const std::filesystem::path& dir, const pugi::xml_node
     const std::string componentSource = node.attribute("source").as_string();
     const auto connectors = parse_connectors(node.child("ssd:Connectors"));
     const auto parameterSets = parse_parameter_bindings(dir, node.child("ssd:ParameterBindings"));
-    return {componentName, componentSource, connectors, parameterSets};
+    const auto annotations = node.child("ssd:Annotations");
+    std::optional<double> stepSizeHint = std::nullopt;
+    for (const auto& annotationNode : annotations) {
+        if (std::string(annotationNode.attribute("type").as_string()) == "com.opensimulationplatform") {
+            stepSizeHint = annotationNode.child("osp:StepSizeHint").attribute("value").as_double();
+        }
+    }
+
+    return {componentName, componentSource, stepSizeHint, connectors, parameterSets};
 }
 
 std::unordered_map<std::string, Component> parse_components(const std::filesystem::path& dir, const pugi::xml_node& node)

src/ecos/ssp/ssp.hpp

@@ -65,6 +65,7 @@ struct Component
 {
     std::string name;
     std::string source;
+    std::optional<double> stepSizeHint;
     std::unordered_map<std::string, Connector> connectors;
     std::unordered_map<std::string, ParameterSet> parameterSets;
 

src/ecos/ssp/ssp_loader.cpp

@@ -28,7 +28,7 @@ class ssp_based_simulation_structure : public simulation_structure
         for (const auto& [name, component] : components) {
             auto model = resolver->resolve(desc_.dir(), component.source);
             if (!model) throw std::runtime_error("Could not resolve model: " + component.source);
-            add_model(name, std::move(model));
+            add_model(name, std::move(model), component.stepSizeHint);
         }
 
         for (const auto& connection : connections) {