std::string getXMLTypeAttribute(const XMLNode& node)
{
if (rapidxml::count_attributes(const_cast<XMLNode*>(&node)) != 1)
raiseXMLException(node, "Expected 1 attribute");
XMLAttribute* attr = node.first_attribute();
if (strcmp(attr->name(), "type"))
raiseXMLException(node, "Missing \"type\" attribute");
return std::string(attr->value());
}
Shape* Shape::buildFromXMLNode(XMLNode& node)
{
if (rapidxml::count_attributes(&node) != 1)
raiseXMLException(node, "Expected 1 attribute");
XMLAttribute* attr = node.first_attribute();
if (strcmp(attr->name(), "type"))
raiseXMLException(node, "Missing \"type\" attribute");
const std::string type(attr->value());
if (type == "Planet")
return Planet::buildFromXMLNode(node);
else if (type == "Star")
return Star::buildFromXMLNode(node);
raiseXMLException(node, std::string("Invalid type: ") + type);
return nullptr; // Keep compiler happy
}