public IRequestable GetParameters(LambdaExpression lambdaExpression, TargetMethodType methodType, AggregationType aggType = AggregationType.Min)
{
IRequestable condition = null;
switch (methodType)
{
case TargetMethodType.Projection: {
switch (lambdaExpression.Body.NodeType)
{
case ExpressionType.Equal: {
condition = createSingleSelectionFunctionFromBinaryExpression(lambdaExpression); // Select a variable with condition
} break;
case ExpressionType.New: {
condition = createMultipleSelectionFunction(lambdaExpression); // Select many variables
} break;
case ExpressionType.Call: {
condition = createSingleSelectionFunction(lambdaExpression); // Select a variable
} break;
case ExpressionType.Parameter: {
condition = new All(); // Select all with no condition
} break;
default: {
condition = createSingleSelectionFunctionFromBinaryExpression(lambdaExpression); // Select a variable with condition
} break;
}
} break;
case TargetMethodType.Selection: {
condition = createFilterForSelection(lambdaExpression);
} break;
case TargetMethodType.Aggregation: {
switch (aggType)
{
case AggregationType.Count: {
condition = createCountFunction(lambdaExpression);
} break;
default: {
condition = createAggregationForAggregationFunction(lambdaExpression, aggType);
} break;
}
} break;
}
return(condition);
}
/// <summary>
/// Initializes a new instance of the <see cref="ProxyMethodAttribute"/> class.
/// </summary>
/// <param name="methodType">The type of the target method.</param>
/// <param name="name">The custom name of the method to proxy, if any.</param>
public ProxyMethodAttribute(TargetMethodType methodType, string name = null)
{
this.methodType = methodType;
this.name = name;
}