Mercurial > pub > bltoolkit
view Source/Data/Linq/Builder/SequenceContextBase.cs @ 0:f990fcb411a9
Копия текущей версии из github
author | cin |
---|---|
date | Thu, 27 Mar 2014 21:46:09 +0400 |
parents | |
children |
line wrap: on
line source
using System; using System.Data; using System.Linq.Expressions; namespace BLToolkit.Data.Linq.Builder { using Data.Sql; public abstract class SequenceContextBase : IBuildContext { protected SequenceContextBase(IBuildContext parent, IBuildContext sequence, LambdaExpression lambda) { Parent = parent; Sequence = sequence; Builder = sequence.Builder; Lambda = lambda; SqlQuery = sequence.SqlQuery; Sequence.Parent = this; Builder.Contexts.Add(this); } #if DEBUG [CLSCompliant(false)] public string _sqlQueryText { get { return SqlQuery == null ? "" : SqlQuery.SqlText; } } #endif public IBuildContext Parent { get; set; } public IBuildContext Sequence { get; set; } public ExpressionBuilder Builder { get; set; } public LambdaExpression Lambda { get; set; } public SqlQuery SqlQuery { get; set; } Expression IBuildContext.Expression { get { return Lambda; } } public virtual void BuildQuery<T>(Query<T> query, ParameterExpression queryParameter) { var expr = BuildExpression(null, 0); var mapper = Builder.BuildMapper<T>(expr); query.SetQuery(mapper.Compile()); } public abstract Expression BuildExpression(Expression expression, int level); public abstract SqlInfo[] ConvertToSql (Expression expression, int level, ConvertFlags flags); public abstract SqlInfo[] ConvertToIndex (Expression expression, int level, ConvertFlags flags); public abstract IsExpressionResult IsExpression (Expression expression, int level, RequestFor requestFlag); public abstract IBuildContext GetContext (Expression expression, int level, BuildInfo buildInfo); public virtual int ConvertToParentIndex(int index, IBuildContext context) { return Parent == null ? index : Parent.ConvertToParentIndex(index, context); } public virtual void SetAlias(string alias) { } public virtual ISqlExpression GetSubQuery(IBuildContext context) { return null; } protected bool IsSubQuery() { for (var p = Parent; p != null; p = p.Parent) if (p.IsExpression(null, 0, RequestFor.SubQuery).Result) return true; return false; } } }