/// <summary>
/// Creates a formattable string from this parameterized SQL.
/// </summary>
/// <returns></returns>
public FormattableString ToFormattableString()
{
var r = new Regex(@"@[A-Z_][A-Z0-9_]+", RegexOptions.IgnoreCase);
var list = new List <object>();
var fmt = r.Replace(
SqlText, (m) =>
{
var placeholder = $"{{{list.Count}}}";
if (ParameterValues.ContainsKey(m.Value))
{
list.Add(ParameterValues[m.Value]);
return(placeholder);
}
if (ParameterValues.ContainsKey(m.Value.Substring(1)))
{
list.Add(ParameterValues[m.Value.Substring(1)]);
return(placeholder);
}
return(m.Value);
}
);
return(FormattableStringFactory.Create(fmt, list.ToArray()));
}
protected override void GenerateTop(SelectExpression selectExpression)
{
Check.NotNull(selectExpression, nameof(selectExpression));
if (selectExpression.Offset != null)
{
if (selectExpression.Offset.NodeType == ExpressionType.Parameter && ParameterValues.ContainsKey(selectExpression.Offset.ToString()))
{
Sql.Append(" SKIP ").Append(ParameterValues[selectExpression.Offset.ToString()].ToString()).Append(" ");
}
else if (selectExpression.Offset.NodeType == ExpressionType.Constant)
{
Sql.Append(" SKIP ").Append(selectExpression.Offset).Append(" ");
}
}
if (selectExpression.Limit != null)
{
if (selectExpression.Limit.NodeType == ExpressionType.Parameter && ParameterValues.ContainsKey(selectExpression.Limit.ToString()))
{
Sql.Append("FIRST ").Append(ParameterValues[selectExpression.Limit.ToString()].ToString()).Append(" ");
}
else if (selectExpression.Limit.NodeType == ExpressionType.Constant)
{
Sql.Append("FIRST ").Append(selectExpression.Limit).Append(" ");
}
}
}
internal IRequestData PrepareRequestData()
{
var headers = new HeaderValue[0];
var rootNode = new BodyTree();
foreach (ServiceParameter parameter in _method.Request.Parameters)
{
var parameterName = parameter.Name;
IBodyTreeItem value;
if (!ParameterValues.ContainsKey(parameterName))
{
value = new BodyTreeNodeParameterValue {
Parameter = parameter,
Value = parameter.DefValue
};
}
else
{
var customValue = ParameterValues[parameterName];
value = GetParameterValue(parameter, customValue);
}
rootNode.Add(value);
}
return(new RequestData(headers, rootNode));
}
protected override void GenerateLimitOffset(SelectExpression selectExpression)
{
Check.NotNull(selectExpression, "selectExpression");
if (!selectExpression.Projection.OfType <RowNumberExpression_DB2>().Any() && selectExpression.Limit != null)
{
if (selectExpression.Limit.NodeType == ExpressionType.Parameter && ParameterValues.ContainsKey(selectExpression.Limit.ToString()))
{
Sql.Append(" FETCH FIRST ").Append(ParameterValues[selectExpression.Limit.ToString()].ToString()).Append(" ROWS ONLY");
}
else if (selectExpression.Limit.NodeType == ExpressionType.Constant)
{
Sql.Append(" FETCH FIRST ").Append(selectExpression.Limit).Append(" ROWS ONLY");
}
}
}
protected override Expression VisitParameter(ParameterExpression parameterExpression)
{
if (!_predicateGenerating || parameterExpression?.Type != typeof(string))
{
return(base.VisitParameter(parameterExpression));
}
var parameterName = SqlGenerator.GenerateParameterName(parameterExpression.Name);
if (Sql.ParameterBuilder.Parameters
.All(p => p.InvariantName != parameterExpression.Name))
{
var parameterType = parameterExpression.Type.UnwrapNullableType();
var typeMapping = TypeMappingSource.GetMapping(parameterType);
if (ParameterValues.ContainsKey(parameterExpression.Name))
{
var value = ParameterValues[parameterExpression.Name];
typeMapping = TypeMappingSource.GetMappingForValue(value);
if (typeMapping == null ||
(!typeMapping.ClrType.UnwrapNullableType().IsAssignableFrom(parameterType) &&
(parameterType.IsEnum ||
!typeof(IConvertible).IsAssignableFrom(parameterType))))
{
typeMapping = TypeMappingSource.GetMapping(parameterType);
}
}
Sql.AddParameter(
parameterExpression.Name,
parameterName,
typeMapping,
parameterExpression.Type.IsNullableType());
}
var parameterNamePlaceholder = SqlGenerator.GenerateParameterNamePlaceholder(parameterExpression.Name);
AddLowerFunctionToSqlQuery(parameterNamePlaceholder);
return(parameterExpression);
}
/// <summary>
/// Synchronously executes the <see cref="T:Microsoft.AspNetCore.Razor.TagHelpers.TagHelper" />
/// with the given <paramref name="context" /> and <paramref name="output" />. This is the
/// method responsible for localizing the html attributes.
/// </summary>
/// <param name="context">Contains information associated with the current HTML tag.</param>
/// <param name="output">A stateful HTML element used to generate an HTML tag.</param>
public override void Process(TagHelperContext context, TagHelperOutput output)
{
foreach (var attribute in AttributeValues)
{
string key = attribute.Key;
string value = attribute.Value;
if (!string.IsNullOrWhiteSpace(value))
{
string newValue = null;
if (ParameterValues.ContainsKey(key))
{
newValue = localizer.GetString(value, ParameterValues[key].Split(';'));
}
else
{
newValue = localizer.GetString(value);
}
output.Attributes.Add(key, newValue);
}
}
}
void GenerateReplaceSQL(SqlFunctionExpression fun)
{
string o = "";
Sql.Append(fun.FunctionName + "(");
foreach (Expression argument in fun.Arguments)
{
Sql.Append(o);
if (argument.NodeType == ExpressionType.Parameter && ParameterValues.ContainsKey(argument.ToString()))
{
Sql.Append("'" + ParameterValues[argument.ToString()] + "'");
}
else if (argument.NodeType == ExpressionType.Constant)
{
Sql.Append(argument.ToString().StartsWith("\"", StringComparison.Ordinal) ? argument.ToString().Replace("\"", "'") : ("'" + argument + "'"));
}
else
{
(this).Visit(argument);
}
o = ", ";
}
Sql.Append(")");
}
