/// <summary>
/// Adds the given modifier to the SELECT query
/// </summary>
public RDFSelectQuery AddModifier(RDFModifier modifier)
{
if (modifier != null)
{
//Ensure to have only one distinct modifier in the query
if (modifier is RDFDistinctModifier && this.Modifiers.Any(m => m is RDFDistinctModifier))
{
return(this);
}
//Ensure to have only one limit modifier in the query
if (modifier is RDFLimitModifier && this.Modifiers.Any(m => m is RDFLimitModifier))
{
return(this);
}
//Ensure to have only one offset modifier in the query
if (modifier is RDFOffsetModifier && this.Modifiers.Any(m => m is RDFOffsetModifier))
{
return(this);
}
//Add the modifier, avoiding duplicates
if (!this.Modifiers.Exists(m => m.Equals(modifier)))
{
this.Modifiers.Add(modifier);
}
}
return(this);
}
/// <summary>
/// Adds the given modifier to the query
/// </summary>
public RDFSelectQuery AddModifier(RDFModifier modifier)
{
if (modifier != null)
{
//Ensure to have only one distinct modifier in the query
if (modifier is RDFDistinctModifier && this.GetModifiers().Any(m => m is RDFDistinctModifier))
{
return(this);
}
//Ensure to have only one limit modifier in the query
if (modifier is RDFLimitModifier && this.GetModifiers().Any(m => m is RDFLimitModifier))
{
return(this);
}
//Ensure to have only one offset modifier in the query
if (modifier is RDFOffsetModifier && this.GetModifiers().Any(m => m is RDFOffsetModifier))
{
return(this);
}
//Ensure to have only one orderby modifier per variable in the query
if (modifier is RDFOrderByModifier && this.GetModifiers().Any(m => m is RDFOrderByModifier && ((RDFOrderByModifier)m).Variable.Equals(((RDFOrderByModifier)modifier).Variable)))
{
return(this);
}
//Add the modifier, avoiding duplicates
if (!this.GetModifiers().Any(m => m.Equals(modifier)))
{
this.QueryMembers.Add(modifier);
}
}
return(this);
}