public static XElement GetFieldRef(ISpModelContext modelContext, Expression node)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
node = node.StripQuotes();
if (node.NodeType != ExpressionType.MemberAccess)
{
throw new NotSupportedException(string.Format("{0} should be a member access", node));
}
var memberExpression = (MemberExpression) node;
var memberName = memberExpression.Member.Name;
if (memberExpression.Expression.NodeType != ExpressionType.Parameter)
{
throw new NotSupportedException(string.Format("{0} not supported", memberExpression));
}
return new XElement(Tags.FieldRef,
new XAttribute(Tags.Name, modelContext.GetSpFieldInternalName(memberExpression.Member.DeclaringType, memberName)));
}
public XElement Translate(ISpModelContext modelContext, Expression predicate)
{
ModelContext = modelContext;
Visit(predicate);
return Root;
}
protected override Expression VisitConstant(ConstantExpression node)
{
if (typeof (ISpModelContext).IsAssignableFrom(node.Type))
{
ModelContext = (ISpModelContext) node.Value;
}
return node;
}
public XElement Translate(ISpModelContext modelContext, Expression node)
{
node = TreeVisitors.Aggregate(node, (current, treeVisitor) => treeVisitor.Visit(current));
var queryElement = new XElement(Tags.Query,
Translators.Select(translator => translator.Translate(modelContext, node)));
return queryElement;
}
public static XElement GetValue(ISpModelContext modelContext, MemberExpression memberExpression, Expression node)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
node = node.StripQuotes();
if (node.NodeType != ExpressionType.Constant)
{
throw new NotSupportedException(string.Format("{0} should be a constant expression", node));
}
var constantExpression = (ConstantExpression)node;
return new XElement(Tags.Value,
new XAttribute(Tags.Type, modelContext.GetSpFieldTypeAsString(memberExpression.Member.DeclaringType, memberExpression.Member.Name)),
Convert.ToString(modelContext.ConvertToSpValue(memberExpression.Member.DeclaringType, memberExpression.Member.Name, constantExpression.Value)));
}
