예제 #1
0
 /// <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);
 }
예제 #2
0
        /// <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);
        }
예제 #3
0
        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)
 {
 }