/// <summary>
/// Format generate expression
/// </summary>
/// <param name="generateExpression">the expression to be formatted as part of a query string</param>
/// <returns>the expression unchanged</returns>
protected override Expression VisitGenerate(GenerateExpression generateExpression)
{
var str = new GenerateVisitor().GetGenerateString(generateExpression);
this.Builder.Append(str);
return(generateExpression);
}
// protected override Expression VisitTable(TableExpression tableExpression)
// {
// Builder.Append("Relatedtable(");
// Builder.Append(tableExpression.Name);
// Builder.Append(")");
// return tableExpression;
// }
/// <summary>
/// Generate expression formatting method
/// </summary>
/// <param name="generateExpression">generate expression to be formatted</param>
/// <returns>the original expression</returns>
protected override Expression VisitGenerate(GenerateExpression generateExpression)
{
Builder.Append("GENERATE(\n");
Visit(generateExpression.Source);
Builder.Append(",\n");
Visit(generateExpression.Generator);
Builder.Append(")\n");
return(generateExpression);
}
public List <bool> Build <T>(T item, List <ConditionModel> conditions)
{
var resultRules = new List <bool>();
conditions.ForEach(rule =>
{
ParameterExpression genericType = Expression.Parameter(typeof(T));
Type type = GetType <T>(genericType, rule.Key);
if (!type.IsGenericType)
{
Expression left = Expression.Property(genericType, rule.Key);
Expression right = Expression.Constant(Convert.ChangeType(rule.Val, type));
resultRules.Add(GenerateExpression <T>(rule.Condition.ToString().GetExpressionType(), left, right, genericType)(item));
}
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(List <>))
{
resultRules.Add(GenerateExpressionContains <T>(rule, type)(item));
}
});
return(resultRules);
}
/// <summary>
/// Generates query string part corresponding to a generate expression
/// </summary>
/// <param name="generateExpression">the input generate expression</param>
/// <returns>query string part</returns>
public string GetGenerateString(GenerateExpression generateExpression)
{
Visit(generateExpression);
return(Builder.ToString());
}
