示例#1
0
        protected internal virtual Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledSelect CompileSelect(Net.Vpc.Upa.Expressions.Select v, Net.Vpc.Upa.Impl.Uql.ExpressionTranslationManager manager, Net.Vpc.Upa.Impl.Uql.ExpressionDeclarationList declarations)
        {
            if (v == null)
            {
                return(null);
            }
            Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledSelect s = new Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledSelect();
            s.SetDistinct(v.IsDistinct());
            s.SetTop(v.GetTop());
            Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledNameOrSelect nameOrSelect = (Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledNameOrSelect)manager.TranslateAny(v.GetEntity(), declarations);
            string entityAlias = v.GetEntityAlias();

            System.Collections.Generic.HashSet <string> aliases = new System.Collections.Generic.HashSet <string>();
            if (entityAlias == null)
            {
                if (nameOrSelect is Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledEntityName)
                {
                    entityAlias = ((Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledEntityName)nameOrSelect).GetName();
                }
                else
                {
                    entityAlias = "ALIAS";
                }
                int i = 0;
                while (true)
                {
                    string a2 = i == 0 ? entityAlias : (entityAlias + i);
                    if (!aliases.Contains(a2))
                    {
                        aliases.Add(a2);
                        entityAlias = a2;
                        break;
                    }
                    i++;
                }
            }
            s.From(nameOrSelect, entityAlias);
            for (int i = 0; i < v.CountJoins(); i++)
            {
                Net.Vpc.Upa.Expressions.JoinCriteria c = v.GetJoin(i);
                Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledNameOrSelect jnameOrSelect = (Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledNameOrSelect)manager.TranslateAny(c.GetEntity(), declarations);
                entityAlias = c.GetEntityAlias();
                if (entityAlias == null)
                {
                    if (nameOrSelect is Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledEntityName)
                    {
                        entityAlias = ((Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledEntityName)nameOrSelect).GetName();
                    }
                    else
                    {
                        entityAlias = "ALIAS";
                    }
                    i = 0;
                    while (true)
                    {
                        string a2 = i == 0 ? entityAlias : (entityAlias + i);
                        if (!aliases.Contains(a2))
                        {
                            aliases.Add(a2);
                            entityAlias = a2;
                            break;
                        }
                        i++;
                    }
                }
                Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledJoinCriteria cc = new Net.Vpc.Upa.Impl.Uql.Compiledexpression.CompiledJoinCriteria(c.GetJoinType(), jnameOrSelect, entityAlias, manager.TranslateAny(c.GetCondition(), declarations));
                s.Join(cc);
            }
            for (int i = 0; i < v.CountFields(); i++)
            {
                Net.Vpc.Upa.Expressions.QueryField field = v.GetField(i);
                s.Field(manager.TranslateAny(field.GetExpression(), declarations), field.GetAlias());
            }
            s.Where(manager.TranslateAny(v.GetWhere(), declarations));
            s.Having(manager.TranslateAny(v.GetHaving(), declarations));
            for (int i = 0; i < v.CountGroupByItems(); i++)
            {
                Net.Vpc.Upa.Expressions.Expression c = v.GetGroupBy(i);
                s.GroupBy(manager.TranslateAny(c, declarations));
            }
            for (int i = 0; i < v.CountOrderByItems(); i++)
            {
                Net.Vpc.Upa.Expressions.Expression c = v.GetOrderBy(i);
                s.OrderBy(manager.TranslateAny(c, declarations), v.IsOrderAscending(i));
            }
            return(s);
        }