C# SqlString.Copy方法代码示例

		public void ProcessFilters(SqlString sql, ISessionImplementor session)
		{
			filteredParameterValues = new List<object>();
			filteredParameterTypes = new List<IType>();
			filteredParameterLocations = new List<int>();

			if (session.EnabledFilters.Count == 0 || sql.ToString().IndexOf(ParserHelper.HqlVariablePrefix) < 0)
			{
				processedSQL = sql.Copy();
				return;
			}

			Dialect.Dialect dialect = session.Factory.Dialect;
			string symbols = ParserHelper.HqlSeparators + dialect.OpenQuote + dialect.CloseQuote;

			var result = new SqlStringBuilder();

			int originalParameterIndex = 0; // keep track of the positional parameter
			int newParameterIndex = 0;
			_adjustedParameterLocations = new Dictionary<int, int>();

			foreach (var part in sql.Parts)
			{
				if (part is Parameter)
				{
					result.AddParameter();

					// (?) can be a position parameter or a named parameter (already substituted by (?),
					// but only the positional parameters are available at this point. Adding them in the
					// order of appearance is best that can be done at this point of time, but if they
					// are mixed with named parameters, the order is still wrong, because values and
					// types for the named parameters are added later to the end of the list.
					// see test fixture NH-1098

					_adjustedParameterLocations[originalParameterIndex] = newParameterIndex;
					originalParameterIndex++;
					newParameterIndex++;
					continue;
				}

				var tokenizer = new StringTokenizer((string) part, symbols, true);

				foreach (var token in tokenizer)
				{
					if (token.StartsWith(ParserHelper.HqlVariablePrefix))
					{
						string filterParameterName = token.Substring(1);
						object value = session.GetFilterParameterValue(filterParameterName);
						IType type = session.GetFilterParameterType(filterParameterName);

						// If the value is not a value of the type but a collection of values...
						if (value != null && !type.ReturnedClass.IsAssignableFrom(value.GetType()) && // Added to fix NH-882
						    typeof (ICollection).IsAssignableFrom(value.GetType()))
						{
							var coll = (ICollection) value;
							int i = 0;
							foreach (var elementValue in coll)
							{
								i++;
								int span = type.GetColumnSpan(session.Factory);
								if (span > 0)
								{
									result.AddParameter();
									filteredParameterTypes.Add(type);
									filteredParameterValues.Add(elementValue);
									filteredParameterLocations.Add(newParameterIndex);
									newParameterIndex++;
									if (i < coll.Count)
									{
										result.Add(", ");
									}
								}
							}
						}
						else
						{
							int span = type.GetColumnSpan(session.Factory);
							if (span > 0)
							{
								result.AddParameter();
								filteredParameterTypes.Add(type);
								filteredParameterValues.Add(value);
								filteredParameterLocations.Add(newParameterIndex);
								newParameterIndex++;
							}
						}
					}
					else
					{
						result.Add(token);
					}
				}
			}

			processedSQL = result.ToSqlString();
		}