/// <summary>
/// Creates the filter expression from this instance of filter rule.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public Expression <Func <T, bool> > GetExpression <T>()
{
var typeToCompare = Value != null?Value.GetType() : typeof(object);
var provider = FilterExpressionProviderFactory.GetProvider(typeToCompare, Operator);
return(provider.CreateFilterExpression <T>(Expression, Operator, Value));
}
/// <summary>
/// Initializes a new instance of the <see cref="ComplexFilterRule{TEntity}"/> class.
/// </summary>
/// <param name="rules">The rules to join using OR operator.</param>
internal ComplexFilterRule(IEnumerable <FilterRule> rules)
{
argument = Expression.Parameter(typeof(TEntity), "x");
foreach (var filterRule in rules)
{
var typeToCompare = filterRule.Value != null?filterRule.Value.GetType() : typeof(object);
var provider = FilterExpressionProviderFactory.GetProvider(typeToCompare, filterRule.Operator);
var condition = provider.CreateConditionExpression(argument, filterRule.Expression, filterRule.Operator, filterRule.Value);
filterBody = filterBody != null
? Expression.OrElse(condition, filterBody)
: condition;
}
}
