public static object CalculateLambdaExpression(ColumnExpression expression, Type dataType, Type[] servicePredefinedTypes, DataRow dataRow, DataRow inputRow)
{
if (!ExpressionCalculator.IsCacheValid(expression, dataRow, inputRow))
{
expression.CachedDelegate = new CachedDelegate
{
TemplateDataRow = ((dataRow != null) ? dataRow.Table.Clone().NewRow() : null),
TemplateInputRow = ((inputRow != null) ? inputRow.Table.Clone().NewRow() : null)
};
expression.CachedDelegate.CompiledDelegate = ExpressionCalculator.CompileLambdaExpression(expression, dataType, servicePredefinedTypes, expression.CachedDelegate.TemplateDataRow, expression.CachedDelegate.TemplateInputRow);
}
if (expression.CachedDelegate.TemplateDataRow != null)
{
expression.CachedDelegate.TemplateDataRow.ItemArray = dataRow.ItemArray;
}
if (expression.CachedDelegate.TemplateInputRow != null)
{
expression.CachedDelegate.TemplateInputRow.ItemArray = inputRow.ItemArray;
}
return(expression.CachedDelegate.CompiledDelegate.DynamicInvoke(expression.DependentColumns.ToArray()));
}
public static object CalculateLambdaExpression(ColumnExpression expression, Type dataType, DataRow dataRow, DataRow inputRow)
{
return(ExpressionCalculator.CalculateLambdaExpression(expression, dataType, null, dataRow, inputRow));
}
private IList <KeyValuePair <string, object> > CalculateCore(DataRow dataRow, DataRow inputRow, IList <ColumnExpression> query)
{
List <KeyValuePair <string, object> > list = new List <KeyValuePair <string, object> >();
foreach (ColumnExpression columnExpression in query)
{
list.Add(new KeyValuePair <string, object>(columnExpression.ResultColumn, ExpressionCalculator.CalculateLambdaExpression(columnExpression, this.GetColumnRealDataType(dataRow.Table.Columns[columnExpression.ResultColumn]), dataRow, inputRow)));
}
return(list);
}
public static ExpressionCalculator Parse(DataTable table)
{
return(ExpressionCalculator.Parse(table, "LambdaExpression"));
}
internal static Delegate CompileLambdaExpression(ColumnExpression expression, Type dataType, DataRow dataRow, DataRow inputRow)
{
return(ExpressionCalculator.CompileLambdaExpression(expression, dataType, null, dataRow, inputRow));
}