示例#1
0
 static void EnsureMethod(DbMethodCallExpression exp, MethodInfo methodInfo)
 {
     if (exp.Method != methodInfo)
         throw UtilExceptions.NotSupportedMethod(exp.Method);
 }
        static void Method_Contains(DbMethodCallExpression exp, SqlGenerator generator)
        {
            MethodInfo method = exp.Method;

            if (method.DeclaringType == UtilConstants.TypeOfString)
            {
                Method_String_Contains(exp, generator);
                return;
            }

            List <DbExpression> exps    = new List <DbExpression>();
            IEnumerable         values  = null;
            DbExpression        operand = null;

            Type declaringType = method.DeclaringType;

            if (typeof(IList).IsAssignableFrom(declaringType) || (declaringType.IsGenericType && typeof(ICollection <>).MakeGenericType(declaringType.GetGenericArguments()).IsAssignableFrom(declaringType)))
            {
                if (exp.Object.NodeType == DbExpressionType.SqlQuery)
                {
                    /* where Id in(select id from T) */

                    operand = exp.Arguments[0];
                    In(generator, (DbSqlQueryExpression)exp.Object, operand);
                    return;
                }

                DbMemberExpression memberExp = exp.Object as DbMemberExpression;

                if (memberExp == null || !memberExp.IsEvaluable())
                {
                    throw new NotSupportedException(exp.ToString());
                }

                values  = DbExpressionExtension.Evaluate(memberExp) as IEnumerable; //Enumerable
                operand = exp.Arguments[0];
                goto constructInState;
            }
            if (method.IsStatic && declaringType == typeof(Enumerable) && exp.Arguments.Count == 2)
            {
                DbExpression arg0 = exp.Arguments[0];
                if (arg0.NodeType == DbExpressionType.SqlQuery)
                {
                    /* where Id in(select id from T) */

                    operand = exp.Arguments[1];
                    In(generator, (DbSqlQueryExpression)arg0, operand);
                    return;
                }

                DbMemberExpression memberExp = arg0 as DbMemberExpression;

                if (memberExp == null || !memberExp.IsEvaluable())
                {
                    throw new NotSupportedException(exp.ToString());
                }

                values  = DbExpressionExtension.Evaluate(memberExp) as IEnumerable;
                operand = exp.Arguments[1];
                goto constructInState;
            }

            throw UtilExceptions.NotSupportedMethod(exp.Method);

constructInState:
            foreach (object value in values)
            {
                if (value == null)
                {
                    exps.Add(DbExpression.Constant(null, operand.Type));
                }
                else
                {
                    Type valueType = value.GetType();
                    if (valueType.IsEnum)
                    {
                        valueType = Enum.GetUnderlyingType(valueType);
                    }

                    if (Utils.IsToStringableNumericType(valueType))
                    {
                        exps.Add(DbExpression.Constant(value));
                    }
                    else
                    {
                        exps.Add(DbExpression.Parameter(value));
                    }
                }
            }
            In(generator, exps, operand);
        }
示例#3
0
 static void EnsureMethodDeclaringType(DbMethodCallExpression exp, Type ensureType)
 {
     if (exp.Method.DeclaringType != ensureType)
         throw UtilExceptions.NotSupportedMethod(exp.Method);
 }