コード例 #1
0
		public void Token(string token, QueryTranslator q)
		{
			SessionFactoryHelper helper = new SessionFactoryHelper(q.Factory);
			string lctoken = token.ToLowerInvariant();

			if (first)
			{
				first = false;
				if ("distinct".Equals(lctoken))
				{
					q.Distinct = true;
					return;
				}
				else if ("all".Equals(lctoken))
				{
					q.Distinct = false;
					return;
				}
			}

			if (afterNew)
			{
				afterNew = false;
				holderClass = helper.GetImportedClass(token);
				if (holderClass == null)
				{
					throw new QueryException("class not found: " + token);
				}
				q.HolderClass = holderClass;
				insideNew = true;
			}
			else if (token.Equals(StringHelper.Comma))
			{
				if (readyForAliasOrExpression)
				{
					throw new QueryException("alias or expression expected in SELECT");
				}
				q.AppendScalarSelectToken(StringHelper.CommaSpace);
				readyForAliasOrExpression = true;
			}
			else if ("new".Equals(lctoken))
			{
				afterNew = true;
				readyForAliasOrExpression = false;
			}
			else if (StringHelper.OpenParen.Equals(token))
			{
				parenCount++;
				if (!funcStack.HasFunctions && holderClass != null && !readyForAliasOrExpression)
				{
					//opening paren in new Foo ( ... )
					readyForAliasOrExpression = true;
				}
				else if (funcStack.HasFunctions)
				{
					q.AppendScalarSelectToken(token);
				}
				else
				{
					throw new QueryException("HQL function expected before '(' in SELECT clause.");
				}
				readyForAliasOrExpression = true;
			}
			else if (StringHelper.ClosedParen.Equals(token))
			{
				parenCount--;
				if (parenCount < 0)
				{
					throw new QueryException("'(' expected before ')' in SELECT clause.");
				}

				if (insideNew && !funcStack.HasFunctions && !readyForAliasOrExpression)
				{
					//if we are inside a new Result(), but not inside a nested function
					insideNew = false;
				}
				else if (funcStack.HasFunctions)
				{
					q.AppendScalarSelectToken(token);
					IType scalarType = funcStack.GetReturnType();
					funcStack.Pop();

					// Can't have an alias or expression right after the closing parenthesis of a function call.
					readyForAliasOrExpression = false;

					// if all functions were parsed add the type of the first function in stack
					if (!funcStack.HasFunctions)
						q.AddSelectScalar(scalarType);
				}
			}
			else if (IsHQLFunction(lctoken, q) && token == q.Unalias(token))
			{
				if (!readyForAliasOrExpression && !funcStack.HasFunctions)
				{
					// The syntax control inside a functions is delegated to the render
					throw new QueryException("',' expected before function in SELECT: " + token);
				}
				if (funcStack.HasFunctions && funcStack.FunctionGrammar.IsKnownArgument(lctoken))
				{
					// Some function, like extract, may have KnownArgument with the same name of another function
					q.AppendScalarSelectToken(token);
				}
				else
				{
					// 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)
					{
						q.AddCollection(
							pathExpressionParser.CollectionName,
							pathExpressionParser.CollectionRole);
					}
					else if (pathExpressionParser.WhereColumnType.IsEntityType)
					{
						q.AddSelectClass(pathExpressionParser.SelectName);
					}
					q.AppendScalarSelectTokens(pathExpressionParser.WhereColumns);
					q.AddSelectScalar(pathExpressionParser.WhereColumnType);
					pathExpressionParser.AddAssociation(q);
				}
				catch (QueryException)
				{
					// Accept costants in SELECT: NH-280
					// TODO: Parse a costant expression like 5+3+8 (now is not supported in SELECT)
					if (IsStringCostant(token))
					{
						q.AppendScalarSelectToken(token);
						q.AddSelectScalar(NHibernateUtil.String);
					}
					else if (IsIntegerConstant(token))
					{
						q.AppendScalarSelectToken(token);
						q.AddSelectScalar(GetIntegerConstantType(token));
					}
					else if (IsFloatingPointConstant(token))
					{
						q.AppendScalarSelectToken(token);
						q.AddSelectScalar(GetFloatingPointConstantType());
					}
					else if (token.StartsWith(ParserHelper.HqlVariablePrefix))
					{
						q.AddNamedParameter(token.Substring(1));
						q.AppendScalarSelectParameter();
					}
					else
						throw;
				}
				readyForAliasOrExpression = false;
			}
		}
コード例 #2
0
		/// <summary>
		/// 
		/// </summary>
		/// <param name="token"></param>
		/// <param name="q"></param>
		public void Token(string token, QueryTranslator q)
		{
			string lctoken = token.ToLower(CultureInfo.InvariantCulture);

			if (first)
			{
				first = false;
				if (lctoken.Equals("distinct"))
				{
					q.Distinct = true;
					return;
				}
				else if (lctoken.Equals("all"))
				{
					q.Distinct = false;
					return;
				}
			}

			if (afterNew)
			{
				afterNew = false;
				holderClass = SessionFactoryHelper.GetImportedClass(q.Factory, token);
				if (holderClass == null)
				{
					throw new QueryException("class not found: " + token);
				}
				q.HolderClass = holderClass;
				insideNew = true;
			}
			else if (token.Equals(StringHelper.Comma))
			{
				if (ready)
				{
					throw new QueryException("alias or expression expected in SELECT");
				}
				q.AppendScalarSelectToken(StringHelper.CommaSpace);
				ready = true;
			}
			else if ("new".Equals(lctoken))
			{
				afterNew = true;
				ready = false;
			}
			else if (StringHelper.OpenParen.Equals(token))
			{
				if (!aggregate && holderClass != null && !ready)
				{
					//opening paren in new Foo ( ... )
					ready = true;
				}
				else if (aggregate)
				{
					q.AppendScalarSelectToken(token);
				}
				else
				{
					throw new QueryException("aggregate function expected before ( in SELECT");
				}
				ready = true;
			}
			else if (StringHelper.ClosedParen.Equals(token))
			{
				if (insideNew && !aggregate && !ready)
				{
					//if we are inside a new Result(), but not inside a nested function
					insideNew = false;
				}
				else if (aggregate && ready)
				{
					q.AppendScalarSelectToken(token);
					aggregateFuncTokenList.RemoveAt(0);
					if (aggregateFuncTokenList.Count < 1)
					{
						aggregate = false;
						ready = false;
					}
				}
				else
				{
					throw new QueryException("( expected before ) in select");
				}
			}
			else if (countArguments.Contains(lctoken))
			{
				if (!ready || !aggregate)
				{
					throw new QueryException(token + " only allowed inside aggregate function in SELECT");
				}
				q.AppendScalarSelectToken(token);
				if ("*".Equals(token) && !afterAggregatePath)
				{
					q.AddSelectScalar(GetFunction("count", q).ReturnType(NHibernateUtil.Int64, q.Factory));
				} //special case
				afterAggregatePath = false;
			}
			else if (GetFunction(lctoken, q) != null && token == q.Unalias(token))
			{
				// the name of an SQL function
				if (!ready)
				{
					throw new QueryException(", expected before aggregate function in SELECT: " + token);
				}
				aggregate = true;
				afterAggregatePath = false;
				aggregateAddSelectScalar = true;
				aggregateFuncTokenList.Insert(0, lctoken);
				ready = false;
				q.AppendScalarSelectToken(token);
				if (!AggregateHasArgs(lctoken, q))
				{
					q.AddSelectScalar(AggregateType(aggregateFuncTokenList, null, q));
					if (!AggregateFuncNoArgsHasParenthesis(lctoken, q))
					{
						aggregateFuncTokenList.RemoveAt(0);
						if (aggregateFuncTokenList.Count < 1)
						{
							aggregate = false;
							ready = false;
						}
						else
						{
							ready = true;
						}
					}
				}
			}
			else if (aggregate)
			{
				bool constantToken = false;
				if (!ready)
				{
					throw new QueryException("( expected after aggregate function in SELECT");
				}
				try
				{
					ParserHelper.Parse(aggregatePathExpressionParser, q.Unalias(token), ParserHelper.PathSeparators, q);
				}
				catch (QueryException)
				{
					constantToken = true;
				}
				afterAggregatePath = true;

				if (constantToken)
				{
					q.AppendScalarSelectToken(token);
				}
				else
				{
					if (aggregatePathExpressionParser.IsCollectionValued)
					{
						q.AddCollection(
							aggregatePathExpressionParser.CollectionName,
							aggregatePathExpressionParser.CollectionRole);
					}
					q.AppendScalarSelectToken(aggregatePathExpressionParser.WhereColumn);
					if (aggregateAddSelectScalar)
					{
						q.AddSelectScalar(AggregateType(aggregateFuncTokenList, aggregatePathExpressionParser.WhereColumnType, q));
						aggregateAddSelectScalar = false;
					}
					aggregatePathExpressionParser.AddAssociation(q);
				}
			}
			else
			{
				if (!ready)
				{
					throw new QueryException(", expected in SELECT");
				}

				ParserHelper.Parse(pathExpressionParser, q.Unalias(token), ParserHelper.PathSeparators, q);
				if (pathExpressionParser.IsCollectionValued)
				{
					q.AddCollection(
						pathExpressionParser.CollectionName,
						pathExpressionParser.CollectionRole);
				}
				else if (pathExpressionParser.WhereColumnType.IsEntityType)
				{
					q.AddSelectClass(pathExpressionParser.SelectName);
				}
				q.AppendScalarSelectTokens(pathExpressionParser.WhereColumns);
				q.AddSelectScalar(pathExpressionParser.WhereColumnType);
				pathExpressionParser.AddAssociation(q);

				ready = false;
			}
		}