private static string ComposeWhereClauseTemplateForShortcutAttributePath(FilterShortcutAttribute shortcutAttribute)
{
string whereClauseTemplate = string.Empty;
string[] clauses = shortcutAttribute.Path.Split("[]");
int argumentIndex = 0;
for (int i = 0; i != clauses.Length; i++, argumentIndex++)
{
if (i != 0)
{
whereClauseTemplate += $".Any(x{argumentIndex} => x{argumentIndex}";
}
whereClauseTemplate += clauses[i];
}
whereClauseTemplate += "{0}";
for (int i = 0; i != clauses.Length - 1; i++)
{
whereClauseTemplate += ')';
}
return(whereClauseTemplate);
}
private static void CombineWhereClauseForFilter(string whereClauseTemplate, ParameterIndex parameterIndex, List <string> whereClauses, List <object> parameters, PropertyInfo property, IFilter filter)
{
if (whereClauseTemplate != "{0}")
{
whereClauseTemplate = string.Format(whereClauseTemplate, ".{0}");
}
FilterShortcutAttribute shortcutAttribute = property.GetCustomAttribute <FilterShortcutAttribute>();
if (shortcutAttribute == null || string.IsNullOrEmpty(shortcutAttribute.Path))
{
whereClauseTemplate = string.Format(whereClauseTemplate, property.Name + "{0}");
}
else
{
whereClauseTemplate = string.Format(whereClauseTemplate, ComposeWhereClauseTemplateForShortcutAttributePath(shortcutAttribute));
}
CombineWhereClauses(filter, whereClauseTemplate, parameterIndex, whereClauses, parameters);
}
private static void CombineWhereClauseForValue(string whereClauseTemplate, ParameterIndex parameterIndex, List <string> whereClauses, List <object> parameters, PropertyInfo property, object value)
{
FilterShortcutAttribute shortcutAttribute = property.GetCustomAttribute <FilterShortcutAttribute>();
if (shortcutAttribute != null && !string.IsNullOrEmpty(shortcutAttribute.Path))
{
whereClauseTemplate = string.Format(whereClauseTemplate, ComposeWhereClauseTemplateForShortcutAttributePath(shortcutAttribute));
}
string whereClause;
if (property.Name == "Equals")
{
if (value is DateTime)
{
whereClause = string.Format(whereClauseTemplate, $".Date = @{parameterIndex.Value++}");
}
else
{
whereClause = string.Format(whereClauseTemplate, $" = @{parameterIndex.Value++}");
}
}
else if (property.Name == "From")
{
whereClause = string.Format(whereClauseTemplate, $" >= @{parameterIndex.Value++}");
}
else if (property.Name == "To")
{
whereClause = string.Format(whereClauseTemplate, $" <= @{parameterIndex.Value++}");
}
else if (property.Name == "Contains")
{
whereClause = string.Format(whereClauseTemplate, $".Contains(@{parameterIndex.Value++})");
}
else
{
if (whereClauseTemplate != "{0}")
{
whereClauseTemplate = string.Format(whereClauseTemplate, ".{0}");
}
whereClause = string.Format(whereClauseTemplate, $"{property.Name} = @{parameterIndex.Value++}");
}
whereClauses.Add(whereClause);
if (value is DateTime && property.Name == "Equals")
{
parameters.Add(((DateTime)value).Date);
}
else
{
parameters.Add(value);
}
}
private static string ComposeWhereClauseTemplateForShortcutAttributePath(Indexer shortcutIndexer, FilterShortcutAttribute shortcutAttribute)
{
StringBuilder whereClauseTemplate = new StringBuilder();
string[] clauses = shortcutAttribute.Path.Split("[]");
for (int i = 0; i != clauses.Length; i++)
{
if (i != 0)
{
shortcutIndexer.Value++;
whereClauseTemplate.Append($".Any(x{shortcutIndexer.Value} => x{shortcutIndexer.Value}");
}
whereClauseTemplate.Append(clauses[i]);
}
whereClauseTemplate.Append("{0}");
whereClauseTemplate.Append(new string(')', clauses.Length - 1));
return(whereClauseTemplate.ToString());
}
