/// <summary>
/// Executes an OData <see cref="Expression"/>.
/// </summary>
/// <param name="expression">The OData query <see cref="Expression"/>.</param>
/// <returns>The result of the OData expression execution.</returns>
public virtual object Execute(Expression expression)
{
var visitor = new ODataExpressionVisitor(expression);
var operation = visitor.Eval();
if (HttpContext.Current != null)
{
HttpContext.Current.Items.Add("ODataQueryOperation.Current", operation);
}
return(this.ExecuteQuery(operation));
}
/// <summary>
/// Evaluates a custom <see cref="ExpressionVisitor"/> to get a resource.
/// </summary>
/// <param name="query">The <see cref="IQueryable"/> which contains the
/// expression to get the resource.</param>
/// <param name="fullTypeName">The resource full type name.</param>
/// <returns>The expected resource.</returns>
public object GetResource(IQueryable query, string fullTypeName)
{
var visitor = new ODataExpressionVisitor(query.Expression);
var operation = visitor.Eval() as ODataSelectOneQueryOperation;
if (operation != null)
{
this.currentEntity = query.Provider.Execute(query.Expression);
if (operation.Key.StartsWith("temp-"))
{
this.currentOperation = "CreateResource";
}
}
return(this.currentEntity);
}