protected override Expression VisitClientJoin(ClientJoinExpression join)
{
Expression expression = this.MakeJoinKey(join.InnerKey as IList <Expression>);
Expression exp = this.MakeJoinKey(join.OuterKey as IList <Expression>);
Expression projector = Expression.New(typeof(KeyValuePair <,>).MakeGenericType(new Type[] { expression.Type, join.Projection.Projector.Type }).GetConstructor(new Type[] { expression.Type, join.Projection.Projector.Type }), new Expression[] { expression, join.Projection.Projector });
ProjectionExpression projection = new ProjectionExpression(join.Projection.Select, projector);
int num = ++this.nLookup;
Expression expression5 = this.ExecuteProjection(projection, false);
ParameterExpression expression6 = Expression.Parameter(projector.Type, "kvp");
if (join.Projection.Projector.NodeType == ((ExpressionType)0x3f9))
{
LambdaExpression expression7 = Expression.Lambda(Expression.PropertyOrField(expression6, "Value").NotEqual(King.Framework.Linq.TypeHelper.GetNullConstant(join.Projection.Projector.Type)), new ParameterExpression[] { expression6 });
expression5 = Expression.Call(typeof(Enumerable), "Where", new Type[] { expression6.Type }, new Expression[] { expression5, expression7 });
}
LambdaExpression expression8 = Expression.Lambda(Expression.PropertyOrField(expression6, "Key"), new ParameterExpression[] { expression6 });
LambdaExpression expression9 = Expression.Lambda(Expression.PropertyOrField(expression6, "Value"), new ParameterExpression[] { expression6 });
Expression item = Expression.Call(typeof(Enumerable), "ToLookup", new Type[] { expression6.Type, exp.Type, join.Projection.Projector.Type }, new Expression[] { expression5, expression8, expression9 });
ParameterExpression instance = Expression.Parameter(item.Type, "lookup" + num);
Expression replaceWith = Expression.Call(instance, instance.Type.GetProperty("Item").GetGetMethod(), new Expression[] { this.Visit(exp) });
if (join.Projection.Aggregator != null)
{
replaceWith = DbExpressionReplacer.Replace(join.Projection.Aggregator.Body, join.Projection.Aggregator.Parameters[0], replaceWith);
}
this.variables.Add(instance);
this.initializers.Add(item);
return(replaceWith);
}
protected ClientJoinExpression UpdateClientJoin(ClientJoinExpression join, ProjectionExpression projection, IEnumerable <Expression> outerKey, IEnumerable <Expression> innerKey)
{
if (((projection != join.Projection) || (outerKey != join.OuterKey)) || (innerKey != join.InnerKey))
{
return(new ClientJoinExpression(projection, outerKey, innerKey));
}
return(join);
}
protected virtual Expression VisitClientJoin(ClientJoinExpression join)
{
ProjectionExpression projection = (ProjectionExpression)this.Visit(join.Projection);
ReadOnlyCollection <Expression> outerKey = this.VisitExpressionList(join.OuterKey);
ReadOnlyCollection <Expression> innerKey = this.VisitExpressionList(join.InnerKey);
return(this.UpdateClientJoin(join, projection, outerKey, innerKey));
}
protected override Expression VisitClientJoin(ClientJoinExpression join)
{
ReadOnlyCollection <Expression> innerKey = this.VisitExpressionList(join.InnerKey);
ReadOnlyCollection <Expression> outerKey = this.VisitExpressionList(join.OuterKey);
ProjectionExpression projection = (ProjectionExpression)this.Visit(join.Projection);
if (((projection != join.Projection) || (innerKey != join.InnerKey)) || (outerKey != join.OuterKey))
{
return(new ClientJoinExpression(projection, outerKey, innerKey));
}
return(join);
}
protected override Expression VisitClientJoin(ClientJoinExpression join)
{
bool isTopLevel = this.isTopLevel;
SelectExpression currentSelect = this.currentSelect;
this.isTopLevel = true;
this.currentSelect = null;
Expression expression2 = base.VisitClientJoin(join);
this.isTopLevel = isTopLevel;
this.currentSelect = currentSelect;
return(expression2);
}
protected virtual Expression VisitClientJoin(ClientJoinExpression join)
{
this.AddAlias(join.Projection.Select.Alias);
base.Write("ClientJoin(");
base.WriteLine(ExpressionWriter.Indentation.Inner);
base.Write("OuterKey(");
this.VisitExpressionList(join.OuterKey);
base.Write("),");
base.WriteLine(ExpressionWriter.Indentation.Same);
base.Write("InnerKey(");
this.VisitExpressionList(join.InnerKey);
base.Write("),");
base.WriteLine(ExpressionWriter.Indentation.Same);
this.Visit(join.Projection);
base.WriteLine(ExpressionWriter.Indentation.Outer);
base.Write(")");
return(join);
}
