/// <exception cref="OverflowException"><paramref name="condition.Operand" /> Enum Names should be equivalent</exception>
private Expression BuildExpressionForCondition(Condition condition, Expression paramUser, int level = 0)
{
var leftLocatorExpression = BuildLocatorExpression(condition.Left, paramUser, ++level);
if (condition.Right != null && condition.Right.IsLambda)
{
return(BuildLocatorExpression(condition.Right, leftLocatorExpression, ++level));
}
if (condition.Right == null)
{
return(leftLocatorExpression);
}
var rightLocatorExpression = BuildLocatorExpression(condition.Right, paramUser, ++level);
var expressionType = ExpressionTypeHelper.GetByConditionOperand(condition.Operand);
var result = Expression.MakeBinary(expressionType, leftLocatorExpression,
Expression.Convert(rightLocatorExpression, leftLocatorExpression.Type));
return(result);
}
/// <exception cref="OverflowException"><paramref name="conditions" /> Enum Names should be equivalent</exception>
public Expression BuildExpressionForConditions(ICollection <Condition> conditions, ParameterExpression parameter,
int level)
{
Expression result = Expression.Constant(true);
if (conditions.Any())
{
result = BuildExpressionForCondition(conditions.First(), parameter, ++level);
if (conditions.Count == 1)
{
return(result);
}
}
foreach (var condition in conditions.Skip(1))
{
var binaryOperation = ExpressionTypeHelper.GetByAggregator(condition.Aggregator);
var conditionExpression = BuildExpressionForCondition(condition, parameter, ++level);
result = Expression.MakeBinary(binaryOperation, result, Expression.Convert(conditionExpression, result.Type));
}
return(result);
}
