public static IAggregateExpression CompileAggregateExpression(NamedExpressionElement element, IEnumerable <Declaration> declarations)
{
var declarationsList = declarations.ToList();
if (element.Imports.Count() == 1 &&
Equals(element.Imports.Single(), declarationsList.Last()))
{
var optimizer = new ExpressionSingleParameterOptimizer <Func <object, object> >();
var optimizedExpression = optimizer.ConvertParameter(element.Expression);
var @delegate = optimizedExpression.Compile();
var fastDelegate = Create(@delegate, element.Expression.Parameters.Count);
var expression = new AggregateFactExpression(element.Name, element.Expression, fastDelegate);
return(expression);
}
else
{
var optimizer = new ExpressionMultiParameterOptimizer <Func <object[], object> >();
var optimizedExpression = optimizer.CompactParameters(element.Expression, 0);
var @delegate = optimizedExpression.Compile();
var fastDelegate = Create(@delegate, element.Expression.Parameters.Count);
var factMap = IndexMap.CreateMap(element.Imports, declarationsList);
var expression = new AggregateExpression(element.Name, element.Expression, fastDelegate, factMap);
return(expression);
}
}
public static FastDelegate <Func <object, bool> > AlphaCondition(LambdaExpression expression)
{
var optimizer = new ExpressionSingleParameterOptimizer <Func <object, bool> >();
var optimizedExpression = optimizer.ConvertParameter(expression);
var @delegate = optimizedExpression.Compile();
var fastDelegate = Create(@delegate, expression.Parameters.Count);
return(fastDelegate);
}
public static IAlphaCondition CompileAlphaCondition(ConditionElement element)
{
var optimizer = new ExpressionSingleParameterOptimizer <Func <object, bool> >();
var optimizedExpression = optimizer.ConvertParameter(element.Expression);
var @delegate = optimizedExpression.Compile();
var fastDelegate = Create(@delegate, element.Expression.Parameters.Count);
var condition = new AlphaCondition(element.Expression, fastDelegate);
return(condition);
}