/// <summary>
/// Visitor pattern method for <see cref="T:System.Data.Entity.Core.Common.CommandTrees.DbJoinExpression" />.
/// </summary>
/// <param name="expression"> The DbJoinExpression that is being visited. </param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="expression" />
/// is null
/// </exception>
public override void Visit(DbJoinExpression expression)
{
Check.NotNull <DbJoinExpression>(expression, nameof(expression));
this.VisitExpressionBindingPre(expression.Left);
this.VisitExpressionBindingPre(expression.Right);
this.VisitExpression(expression.JoinCondition);
this.VisitExpressionBindingPost(expression.Left);
this.VisitExpressionBindingPost(expression.Right);
}
/// <summary>
/// Visitor pattern method for <see cref="DbJoinExpression" />.
/// </summary>
/// <param name="expression"> The DbJoinExpression that is being visited. </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="expression" />
/// is null
/// </exception>
public override void Visit(DbJoinExpression expression)
{
Check.NotNull(expression, "expression");
VisitExpressionBindingPre(expression.Left);
VisitExpressionBindingPre(expression.Right);
VisitExpression(expression.JoinCondition);
VisitExpressionBindingPost(expression.Left);
VisitExpressionBindingPost(expression.Right);
}
public override DbExpression Visit(DbJoinExpression expression)
{
Check.NotNull(expression, "expression");
DbExpression result = expression;
var newLeft = VisitExpressionBinding(expression.Left);
var newRight = VisitExpressionBinding(expression.Right);
EnterScope(newLeft.Variable, newRight.Variable);
var newCondition = VisitExpression(expression.JoinCondition);
ExitScope();
if (!ReferenceEquals(expression.Left, newLeft)
||
!ReferenceEquals(expression.Right, newRight)
||
!ReferenceEquals(expression.JoinCondition, newCondition))
{
if (DbExpressionKind.InnerJoin
== expression.ExpressionKind)
{
result = CqtBuilder.InnerJoin(newLeft, newRight, newCondition);
}
else if (DbExpressionKind.LeftOuterJoin
== expression.ExpressionKind)
{
result = CqtBuilder.LeftOuterJoin(newLeft, newRight, newCondition);
}
else
{
Debug.Assert(
expression.ExpressionKind == DbExpressionKind.FullOuterJoin,
"DbJoinExpression had ExpressionKind other than InnerJoin, LeftOuterJoin or FullOuterJoin?");
result = CqtBuilder.FullOuterJoin(newLeft, newRight, newCondition);
}
}
NotifyIfChanged(expression, result);
return(result);
}
/// <summary> /// When overridden in a derived class, implements the visitor pattern for /// <see /// cref="T:System.Data.Entity.Core.Common.CommandTrees.DbJoinExpression" /> /// . /// </summary> /// <returns>A result value of a specific type.</returns> /// <param name="expression"> /// The <see cref="T:System.Data.Entity.Core.Common.CommandTrees.DbJoinExpression" /> that is being visited. /// </param> public abstract TResultType Visit(DbJoinExpression expression);
/// <summary> /// When overridden in a derived class, implements the visitor pattern for /// <see cref="T:System.Data.Entity.Core.Common.CommandTrees.DbJoinExpression" /> /// . /// </summary> /// <param name="expression"> /// The <see cref="T:System.Data.Entity.Core.Common.CommandTrees.DbJoinExpression" /> that is visited. /// </param> public abstract void Visit(DbJoinExpression expression);
public override void Visit(DbJoinExpression expression)
{
}
