C# QueryTranslator.AddNamedParameter方法代碼示例

		public void Token(string token, QueryTranslator q)
		{
			if (q.IsName(StringHelper.Root(token)))
			{
				ParserHelper.Parse(pathExpressionParser, q.Unalias(token), ParserHelper.PathSeparators, q);
				q.AppendGroupByToken(pathExpressionParser.WhereColumn);
				pathExpressionParser.AddAssociation(q);
			}
			else if (token.StartsWith(ParserHelper.HqlVariablePrefix))
			{
				q.AddNamedParameter(token.Substring(1));
				q.AppendGroupByParameter();
			}
			else
			{
				q.AppendGroupByToken(token);
			}
		}

//.........這裏部分代碼省略.........
					// Is a nested function
					funcStack.Push(GetFunction(lctoken, q));
					q.AppendScalarSelectToken(token);
					if (!funcStack.SqlFunction.HasArguments && !funcStack.SqlFunction.HasParenthesesIfNoArguments)
					{
						q.AddSelectScalar(funcStack.GetReturnType());
						funcStack.Pop();
						readyForAliasOrExpression = funcStack.HasFunctions;
					}
				}
			}
			else if (funcStack.HasFunctions)
			{
				bool constantToken = false;
				var expectedParen = parenCount + ((insideNew) ? -1 : 0);
				if (!readyForAliasOrExpression && expectedParen != funcStack.NestedFunctionCount)
				{
					throw new QueryException("'(' expected after HQL function in SELECT");
				}
				try
				{
					ParserHelper.Parse(funcStack.PathExpressionParser, q.Unalias(token), ParserHelper.PathSeparators, q);
				}
				catch (QueryException)
				{
					if (IsPathExpression(token))
						throw;
					// If isn't a path the token is added like part of function arguments
					constantToken = true;
				}

				if (token.StartsWith(ParserHelper.HqlVariablePrefix))
				{
					q.AddNamedParameter(token.Substring(1));
					q.AppendScalarSelectParameter();
				}
				else if (constantToken)
				{
					q.AppendScalarSelectToken(token);
				}
				else
				{
					if (funcStack.PathExpressionParser.IsCollectionValued)
					{
						q.AddCollection(
							funcStack.PathExpressionParser.CollectionName,
							funcStack.PathExpressionParser.CollectionRole);
					}
					q.AppendScalarSelectToken(funcStack.PathExpressionParser.WhereColumn);
					funcStack.PathExpressionParser.AddAssociation(q);
				}
				// after a function argument
				readyForAliasOrExpression = false;
			}
			else
			{
				if (!readyForAliasOrExpression)
				{
					throw new QueryException("',' expected in SELECT before:" + token);
				}

				try
				{
					//High probablly to find a valid pathExpression
					ParserHelper.Parse(pathExpressionParser, q.Unalias(token), ParserHelper.PathSeparators, q);
					if (pathExpressionParser.IsCollectionValued)

		private void DoToken(string token, QueryTranslator q)
		{
			SessionFactoryHelper helper = new SessionFactoryHelper(q.Factory);
			if (q.IsName(StringHelper.Root(token))) //path expression
			{
				DoPathExpression(q.Unalias(token), q);
			}
			else if (token.StartsWith(ParserHelper.HqlVariablePrefix)) //named query parameter
			{
				q.AddNamedParameter(token.Substring(1));
				// this is only a temporary parameter to help with the parsing of hql - 
				// when the type becomes known then this will be converted to its real
				// parameter type.
				AppendToken(q, SqlString.Parameter);
			}
			else if (token.Equals(StringHelper.SqlParameter))
			{
				//if the token is a "?" then we have a Parameter so convert it to a SqlCommand.Parameter
				// instead of appending a "?" to the WhereTokens
				AppendToken(q, SqlString.Parameter);
			}
			else
			{
				IQueryable persister = q.GetPersisterUsingImports(token);
				if (persister != null) // the name of a class
				{
					string discrim = persister.DiscriminatorSQLValue;
					if (InFragment.Null == discrim || InFragment.NotNull == discrim)
					{
						throw new QueryException("subclass test not allowed for null or not null discriminator");
					}
					AppendToken(q, discrim);
				}
				else
				{
					object constant;
					string fieldName = null;
					System.Type importedType = null;

					int indexOfDot = token.IndexOf(StringHelper.Dot);
					// don't even bother to do the lookups if the indexOfDot is not 
					// greater than -1.  This will save all the string modifications.

					// This allows us to resolve to the full type before obtaining the value e.g. FooStatus.OFF -> NHibernate.Model.FooStatus.OFF
					if (indexOfDot > -1)
					{
						fieldName = StringHelper.Unqualify(token);
						string typeName = StringHelper.Qualifier(token);
						importedType = helper.GetImportedClass(typeName);
					}

					if (indexOfDot > -1 && importedType != null &&
							(constant = ReflectHelper.GetConstantValue(importedType, fieldName)) != null)
					{
						// need to get the NHibernate Type so we can convert the Enum or field from 
						// a class into it's string representation for hql.
						IType type;
						try
						{
							type = TypeFactory.HeuristicType(constant.GetType().AssemblyQualifiedName);
						}
						catch (MappingException me)
						{
							throw new QueryException(me);
						}

						if (type == null)
						{
							throw new QueryException(string.Format("Could not determin the type of: {0}", token));
						}

						try
						{
							AppendToken(q, ((ILiteralType)type).ObjectToSQLString(constant, q.Factory.Dialect));
						}
						catch (Exception e)
						{
							throw new QueryException("Could not format constant value to SQL literal: " + token, e);
						}
					}
					else
					{
						//anything else
						string negatedToken = null;
						if (negated)
							negations.TryGetValue(token.ToLowerInvariant(), out negatedToken);
						if (negatedToken != null && (!betweenSpecialCase || !"or".Equals(negatedToken)))
						{
							AppendToken(q, negatedToken);
						}
						else
						{
							AppendToken(q, token);
						}
					}
				}
			}
		}