/// <summary>
/// Searches through the current <see cref="SchemaEntries"/> for a matching column
/// </summary>
/// <param name="columnName">The name of the column to retrieve the SchemaItem for</param>
/// <returns>A SchemaItem that matches the columnName, or null for no matches</returns>
public virtual SchemaItem FindSchemaItem(string columnName)
{
if (this.SchemaEntries.Count == 0)
{
return(null);
}
for (int i = 0; i < this.SchemaEntries.Count; i++)
{
SchemaItem si = (SchemaItem)this.SchemaEntries[i];
if (si.FieldName == columnName)
{
return(si);
}
}
return(null);
}
/// <summary>
/// Initializes a new instance of <see cref="ValueParameter"/>.
/// </summary>
/// <param name="item">A <see cref="SchemaItem"/> for the parameter</param>
public ValueParameter(SchemaItem item)
{
this._schemaItem = item;
this._column = item.FieldName;
}
/// <summary>
/// This is only called internally by the EasyObject architecture.
/// </summary>
/// <param name="item">The SchemaItem associated with the WhereParameter</param>
public WhereParameter(SchemaItem item) : base(item)
{
this._operator = Operand.Equal;
}
/// <summary>
/// This is only called by EasyObject architecture.
/// </summary>
/// <param name="item">A <see cref="SchemaItem"/> to use in the aggregate</param>
public AggregateParameter(SchemaItem item) : base(item)
{
this._alias = item.FieldName;
this._distinct = false;
this._function = AggregateParameter.Func.Sum;
}