public static Expression GetPredicateExpression
(ParameterExpression instanceParameter, string sourceExpression, ExpressionOperator @operator, object value, PredicateBuilderConfiguration configuration = null)
{
var left = MemberExpressionBuilder.GetExpressionSelector(instanceParameter, sourceExpression).Body;
return(GetPredicateExpression(left, @operator, value, configuration));
}
private Expression GetExpression(IProjectionSource source, ParameterExpression itParameter)
{
switch (source)
{
case StringProjectionSource stringProjectionSource:
return(MemberExpressionBuilder.GetExpression(itParameter, stringProjectionSource.SourceExpression));
case ExpressionProjectionSource expressionProjectionSource:
return(Expressions.ExpressionParameterReplacer.Replace(expressionProjectionSource.SourceExpression, itParameter.Type, itParameter));
case LambdaExpressionProjectionSource lambdaExpressionProjectionSource:
return(Expressions.ExpressionParameterReplacer.Replace(lambdaExpressionProjectionSource.SourceExpression, lambdaExpressionProjectionSource.SourceExpression.Parameters.First(), itParameter));
case ConstantProjectionSource constantProjectionSource:
return(Expression.Constant(constantProjectionSource.Value));
}
throw new InvalidOperationException("Unexpected projection source type");
}
private void GenerateOperationalAccessors(ModuleBuilder target,
string targetName,
IEnumerable <PapVariable> variables)
{
// Generiert Properties, die Eingabe- oder Ausgabeparameter in die Berechnungsklasse
// weiterleiten.
foreach (var variable in variables)
{
var memberExpr = new MemberExpressionBuilder(targetName, variable.Name);
var getter = new ReturnStatementBuilder(memberExpr);
var setter = new AssignmentStatementBuilder(memberExpr,
new KeywordExpressionBuilder(KeywordExpressionBuilder.Keywords.Value));
target.Properties.Add(new FullPropertyBuilder(Visibilities.Private,
TypeMapping.Map(variable.Type),
variable.Name,
getter,
setter));
}
}
private InvocationExpressionBuilder MakeRoundingExpression(ExpressionBuilder inner,
ConstantExpressionBuilder decimals,
MemberExpressionBuilder direction)
{
if (direction != null)
{
string roundingFunction;
if (direction.IsEquivalent("BigDecimal.ROUND_UP"))
{
roundingFunction = "Ceiling";
}
else if (direction.IsEquivalent("BigDecimal.ROUND_DOWN"))
{
roundingFunction = "Floor";
}
else
{
throw new NotSupportedException();
}
var invocation = new InvocationExpressionBuilder(roundingFunction);
invocation.Arguments.Add(inner);
invocation.Arguments.Add(decimals);
return(invocation);
}
else
{
var invocation = new InvocationExpressionBuilder("System.Math.Round");
invocation.Arguments.Add(inner);
invocation.Arguments.Add(decimals);
invocation.Arguments.Add(new MemberExpressionBuilder("System", "MidpointRounding", "AwayFromZero"));
return(invocation);
}
}
