public override SqlFragment Visit(DbIsEmptyExpression expression)
{
ExistsFragment f = new ExistsFragment(expression.Argument.Accept(this));
f.Negate();
return(f);
}
public override void Visit(DbIsEmptyExpression e)
{
Check.NotNull(e, "e");
BeginUnary(e);
End(e);
}
public override void Visit(DbIsEmptyExpression expression)
{
Write(expression);
_depth++;
Write("Argument", expression.Argument);
_depth--;
}
/// <summary>
/// Implements the visitor pattern for <see cref="T:System.Data.Common.CommandTrees.DbIsEmptyExpression"/>.
/// </summary>
/// <param name="expression">The <see cref="T:System.Data.Common.CommandTrees.DbIsEmptyExpression"/> that is visited.</param>
public override void Visit(DbIsEmptyExpression expression)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
expression.Argument.Accept(this);
}
/// <summary>
/// <see cref="Visit(DbIsEmptyExpression)"/>
/// </summary>
/// <param name="e"></param>
/// <param name="negate">Was the parent a DbNotExpression?</param>
/// <returns></returns>
SqlBuilder VisitIsEmptyExpression(DbIsEmptyExpression e, bool negate)
{
if (negate)
{
return(new SqlBuilder(" exists (", VisitExpressionEnsureSqlStatement(e.Argument), Environment.NewLine, ")"));
}
else
{
return(new SqlBuilder(" not exists (", VisitExpressionEnsureSqlStatement(e.Argument), Environment.NewLine, ")"));
}
}
public override void Visit(DbIsEmptyExpression e)
{
Check.NotNull(e, "e");
VisitUnary(e);
}
/// <summary>
/// Not(IsEmpty) has to be handled specially, so we delegate to
/// <see cref="VisitIsEmptyExpression"/>.
///
/// </summary>
/// <param name="e"></param>
/// <returns>A <see cref="SqlBuilder"/>.
/// <code>[NOT] EXISTS( ... )</code>
/// </returns>
public override ISqlFragment Visit(DbIsEmptyExpression e)
{
return(VisitIsEmptyExpression(e, false));
}
/// <summary>
/// Implements the visitor pattern for <see cref="T:System.Data.Common.CommandTrees.DbIsEmptyExpression"/>.
/// </summary>
/// <param name="expression">The <see cref="T:System.Data.Common.CommandTrees.DbIsEmptyExpression"/> that is visited.</param>
public override void Visit(DbIsEmptyExpression expression)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
expression.Argument.Accept(this);
}
public override TReturn Visit(DbIsEmptyExpression expression)
{
Check.NotNull(expression, "expression");
throw ConstructNotSupportedException(expression);
}
public override void Visit(DbIsEmptyExpression e)
{
VisitUnary(e);
}
/// <summary> /// Visitor pattern method for DbIsEmptyExpression. /// </summary> /// <param name="expression"> The DbIsEmptyExpression that is being visited. </param> public abstract void Visit(DbIsEmptyExpression expression);
public override void Visit(DbIsEmptyExpression expression)
{
this.VisitUnaryExpression((DbUnaryExpression)expression);
}
public override Expression Visit(DbIsEmptyExpression expression)
{
Expression arg = this.Visit(expression.Argument);
return Expression.Not(queryMethodExpressionBuilder.Any(arg));
}
public override bool Visit(DbIsEmptyExpression expression)
{
Check.NotNull <DbIsEmptyExpression>(expression, nameof(expression));
return(this.VisitUnaryExpression((DbUnaryExpression)expression));
}
public override void Visit(DbIsEmptyExpression expression) { }
public override void Visit(DbIsEmptyExpression e)
{
Check.NotNull <DbIsEmptyExpression>(e, nameof(e));
this.VisitUnary((DbUnaryExpression)e);
}
public override ViewValidator.DbExpressionEntitySetInfo Visit(
DbIsEmptyExpression expression)
{
Check.NotNull <DbIsEmptyExpression>(expression, nameof(expression));
return((ViewValidator.DbExpressionEntitySetInfo)null);
}
public override TReturn Visit(DbIsEmptyExpression expression)
{
Check.NotNull <DbIsEmptyExpression>(expression, nameof(expression));
throw this.ConstructNotSupportedException((DbExpression)expression);
}
public override TreeNode Visit(DbIsEmptyExpression e)
{
return(this.VisitUnary(e));
}
public override TReturn Visit(DbIsEmptyExpression expression)
{
throw ConstructNotSupportedException(expression);
}
public override void Visit(DbIsEmptyExpression expression)
{
throw new NotSupportedException("Visit(\"DbIsEmptyExpression\") is not supported.");
}
public override TreeNode Visit(DbIsEmptyExpression e)
{
Check.NotNull(e, "e");
return(VisitUnary(e));
}
public override Expression Visit(DbIsEmptyExpression expression)
{
Expression arg = this.Visit(expression.Argument);
return(Expression.Not(queryMethodExpressionBuilder.Any(arg)));
}
public override void Visit(DbIsEmptyExpression expression)
{
Contract.Requires(expression != null);
}
/// <summary>
/// <see cref="VisitUnaryExpression" />
/// </summary>
/// <param name="expression"> The DbIsEmptyExpression that is being visited. </param>
/// <returns> </returns>
public override bool Visit(DbIsEmptyExpression expression)
{
Check.NotNull(expression, "expression");
return(VisitUnaryExpression(expression));
}
public override object Visit(DbIsEmptyExpression expression)
{
this.Visit(expression.Argument);
return(null);
}
public override void Visit(DbIsEmptyExpression expression)
{
throw new NotSupportedException("Visit(\"IsEmptyExpression\") is not supported.");
}
public override LegacyCommandTrees.DbExpression Visit(DbIsEmptyExpression expression)
{
Debug.Assert(expression != null, "expression != null");
return(expression.Argument.Accept(this).IsEmpty());
}
public override void Visit(DbIsEmptyExpression expression)
{
VisitUnaryExpression(expression);
}
/// <summary> /// Typed visitor pattern method for DbIsEmptyExpression. /// </summary> /// <param name="expression"> The DbIsEmptyExpression that is being visited. </param> /// <returns> An instance of TResultType. </returns> public abstract TResultType Visit(DbIsEmptyExpression expression);
/// <summary>
/// Visitor pattern method for <see cref="DbIsEmptyExpression" />.
/// </summary>
/// <param name="expression"> The DbIsEmptyExpression that is being visited. </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="expression" />
/// is null
/// </exception>
public override void Visit(DbIsEmptyExpression expression)
{
Check.NotNull(expression, "expression");
VisitUnaryExpression(expression);
}
public override TreeNode Visit(DbIsEmptyExpression e)
{
Check.NotNull <DbIsEmptyExpression>(e, nameof(e));
return(this.VisitUnary((DbUnaryExpression)e));
}
public override VfpExpression Visit(DbIsEmptyExpression expression)
{
return(new VfpIsEmptyExpression(expression.ResultType, expression.Argument.Accept(this)));
}
public override void Visit(DbIsEmptyExpression e)
{
VisitUnary(e);
}
public override DbExpressionEntitySetInfo Visit(DbIsEmptyExpression expression)
{
Check.NotNull(expression, "expression");
return(null);
}
/// <summary> /// Visitor pattern method for DbIsEmptyExpression. /// </summary> /// <param name="expression"> The DbIsEmptyExpression that is being visited. </param> public abstract void Visit(DbIsEmptyExpression expression);
public override void Visit(DbIsEmptyExpression e)
{
BeginUnary(e);
End(e);
}
public override void Visit(DbIsEmptyExpression expression)
{
VisitUnaryExpression(expression);
}
public override void Visit(DbIsEmptyExpression e)
{
BeginUnary(e);
End(e);
}
