public SelectDataFromCaseExpression(SqlSearchedCaseExpression caseExpression, RawData rawData)
{
_Expression = caseExpression;
_RawData = rawData;
if (_Expression.ElseExpression != null)
{
_FullTypeInfo = Helper.DetermineFullTypeInfo(_Expression.ElseExpression, rawData);
_ScalarExpression = _Expression.ElseExpression;
}
if (_Expression.ElseExpression == null || _FullTypeInfo.DbDataType == null)
{
var whenExpression = _Expression.WhenClauses.First( );
_FullTypeInfo = Helper.DetermineFullTypeInfo(whenExpression.ThenExpression, rawData);
_ScalarExpression = whenExpression.ThenExpression;
}
}
private static IEnumerable <FullTypeInfo> TypeAndBaseTypesExceptObject(FullTypeInfo type)
{
if (type.Type == null || type.Type == typeof(object))
{
yield break;
}
while (true)
{
yield return(type);
type.Type = type.TypeInfo.BaseType;
if (type.Type == null || type.Type == typeof(object))
{
yield break;
}
type.TypeInfo = type.Type.GetTypeInfo();
}
}
private static bool OverridesEquals(FullTypeInfo specificType)
{
foreach (var type in TypeAndBaseTypesExceptObject(specificType))
{
foreach (var method in type.TypeInfo.DeclaredMethods)
{
if (!method.IsPublic || method.IsStatic || !method.IsVirtual || !method.IsHideBySig || method.Name != "Equals")
{
continue;
}
var baseDefinition = method.GetRuntimeBaseDefinition();
if (baseDefinition.Equals(method))
{
continue;
}
if (baseDefinition.DeclaringType == typeof(object))
{
return(true);
}
}
}
return(false);
}
private static IEnumerable<FullTypeInfo> TypeAndBaseTypesExceptObject(FullTypeInfo type)
{
if (type.Type == null || type.Type == typeof(object))
yield break;
while (true)
{
yield return type;
type.Type = type.TypeInfo.BaseType;
if (type.Type == null || type.Type == typeof(object))
yield break;
type.TypeInfo = type.Type.GetTypeInfo();
}
}
private static bool OverridesEquals(FullTypeInfo specificType)
{
foreach (var type in TypeAndBaseTypesExceptObject(specificType))
{
foreach (var method in type.TypeInfo.DeclaredMethods)
{
if (!method.IsPublic || method.IsStatic || !method.IsVirtual || !method.IsHideBySig
|| !method.Name.Equals("Equals", StringComparison.Ordinal))
continue;
var baseDefinition = method.GetRuntimeBaseDefinition();
if (baseDefinition == method)
continue;
if (baseDefinition.DeclaringType == typeof(object))
return true;
}
}
return false;
}
