private Symbol ProcessAliasedQuerySource(VerificationContext context, HeD.Engine.Model.Node source)
{
var sourceAlias = source.GetAttribute <String>("alias");
var sourceExpression = source.Children[0] as ASTNode;
if (sourceExpression == null)
{
throw new InvalidOperationException(String.Format("Could not determine source expression for alias '{0}'.", sourceAlias));
}
Verifier.Verify(context, sourceExpression);
return(new Symbol(sourceAlias, sourceExpression.ResultType));
}
private SQLModel.SelectClause TranslateReturnClause(TranslationContext context, Node returnClause)
{
var result = new SQLModel.SelectClause();
result.Distinct = returnClause.GetAttribute<Boolean>("distinct", true);
var expression = returnClause.Children.Single(n => n.Name == "expression");
if (expression.NodeType.GetLocalName() == "Tuple")
{
foreach (var element in expression.Children)
{
var column =
new SQLModel.ColumnExpression
(
(Model.Expression)context.TranslateNode((ASTNode)element.Children.Single(n => n.Name == "value")),
element.GetAttribute<String>("name")
);
}
}
return result;
}
private SQLModel.TableSpecifier TranslateAliasedQuerySource(TranslationContext context, Node source)
{
var expression = (ASTNode)source.Children.Where(n => n.Name == "expression").Single();
var alias = source.GetAttribute<String>("alias");
var sqlContext = (SQLTranslationContext)context;
sqlContext.PushQueryContext();
try
{
return new SQLModel.TableSpecifier(SQLTranslationUtilities.EnsureExpression(context.TranslateNode(expression)), alias);
}
finally
{
sqlContext.PopQueryContext();
}
}
private void VerifyResponseBindings(VerificationContext context, Node node, Dictionary<string, ParameterDef> containers)
{
// foreach action
// If DeclareResponseAction
// Create a parameter with that name
// If CollectInformationAction
// Create a property on the appropriate parameter with the correct type
// Name = responseBinding.property
// Type = responseCardinality = Single ? responseDataType : List<responseDataType>
try
{
switch (node.NodeType.GetLocalName())
{
case "DeclareResponseAction" :
{
var containerName = node.GetAttribute<string>("name");
var container = new ParameterDef { Name = containerName, ParameterType = new ObjectType(containerName + "Type", new List<PropertyDef> { }) };
containers.Add(container.Name, container);
}
break;
case "CollectInformationAction" :
{
var responseBinding = node.Children.FirstOrDefault(c => c.Name == "responseBinding");
if (responseBinding != null)
{
var containerName = responseBinding.GetAttribute<string>("container");
if (String.IsNullOrEmpty(containerName))
{
containerName = "Responses";
}
if (!containers.ContainsKey(containerName))
{
throw new InvalidOperationException(String.Format("Could not resolve response container name {0}.", containerName));
}
var container = containers[containerName];
var containerType = (ObjectType)container.ParameterType;
DataType responseType = null;
var responseName = responseBinding.GetAttribute<string>("property");
var documentationConcept = node.Children.FirstOrDefault(c => c.Name == "documentationConcept");
if (documentationConcept != null)
{
var responseDataType = documentationConcept.Children.FirstOrDefault(c => c.Name == "responseDataType");
if (responseDataType != null)
{
responseType = context.ResolveType(responseDataType.GetAttribute<string>("value"));
}
else
{
responseType = DataTypes.String;
}
var responseCardinality = documentationConcept.Children.FirstOrDefault(c => c.Name == "responseCardinality");
if (responseCardinality != null)
{
if (responseCardinality.GetAttribute<string>("value") == "Multiple")
{
responseType = new ListType(responseType);
}
}
}
if (responseType == null)
{
responseType = DataTypes.String;
}
if (containerType.Properties.FirstOrDefault(pd => pd.Name == responseName) != null)
{
throw new InvalidOperationException(String.Format("The response container {0} already has a response named {1}.", container.Name, responseName));
}
containerType.Properties.Add(new PropertyDef(responseName, responseType));
}
}
break;
}
}
catch (Exception e)
{
context.ReportMessage(e, node);
}
foreach (var child in node.Children)
{
VerifyResponseBindings(context, child, containers);
}
}
public static T GetAttribute <T>(this Node node, string attributeName)
{
return(node.GetAttribute(attributeName, default(T)));
}
private string GetGroupSelectionBehavior(Node node)
{
var behaviorsNode = node.Children.FirstOrDefault(c => c.Name == "behaviors");
if (behaviorsNode != null)
{
var behaviorNode = node.Children.FirstOrDefault(c => c.Name == "behavior" && c.NodeType.GetLocalName() == "GroupSelectionBehavior");
if (behaviorNode != null)
{
return node.GetAttribute<string>("value");
}
}
return "All";
}
