protected override Expression VisitExtensionExpression(ExtensionExpression expression)
{
if (expression is LuceneQueryExpression)
{
return VisitLuceneQueryExpression((LuceneQueryExpression)expression);
}
if (expression is LuceneQueryAnyFieldExpression)
{
return VisitLuceneQueryAnyFieldExpression((LuceneQueryAnyFieldExpression)expression);
}
if (expression is LuceneQueryFieldExpression)
{
return VisitLuceneQueryFieldExpression((LuceneQueryFieldExpression) expression);
}
if (expression is LuceneQueryPredicateExpression)
{
return VisitLuceneQueryPredicateExpression((LuceneQueryPredicateExpression) expression);
}
if (expression is BoostBinaryExpression)
{
return VisitBoostBinaryExpression((BoostBinaryExpression) expression);
}
return base.VisitExtensionExpression(expression);
}
protected override Expression VisitExtensionExpression(ExtensionExpression expression)
#endif
{
if (expression is SelectIdentifierVariableNameExpression)
{
var siv = expression as SelectIdentifierVariableNameExpression;
var v = _values[siv.Name].ToString();
if (!String.IsNullOrEmpty(siv.IdentifierPrefix) && v.StartsWith(siv.IdentifierPrefix))
{
v = v.Substring(siv.IdentifierPrefix.Length);
}
if (siv.Type.IsInstanceOfType(v))
{
return Expression.Constant(v, siv.Type);
}
var converted = _converter(v, RdfDatatypes.GetLiteralLanguageTag(_values[siv.Name]), siv.Type);
return Expression.Constant(converted, siv.Type);
}
if (expression is SelectVariableNameExpression)
{
var svn = expression as SelectVariableNameExpression;
var v = _values[svn.Name];
if (svn.Type.IsInstanceOfType(v))
{
return Expression.Constant(v, svn.Type);
}
var converted = _converter(v.ToString(), RdfDatatypes.GetLiteralLanguageTag(v), svn.Type);
return Expression.Constant(converted, svn.Type);
}
return expression;
}
protected override Expression VisitExtensionExpression(ExtensionExpression expression)
{
// Nominated expressions need to prevent joins on non-Identifier member expressions
// (for the test expression of conditional expressions only)
// Otherwise an extra join is created and the GroupBy and Select clauses will not match
var old = _preventJoinsInConditionalTest;
_preventJoinsInConditionalTest = (NhExpressionType)expression.NodeType == NhExpressionType.Nominator;
var expr = base.VisitExtensionExpression(expression);
_preventJoinsInConditionalTest = old;
return expr;
}
protected override Expression VisitExtensionExpression(ExtensionExpression expression)
{
if (expression is AllowSpecialCharactersExpression)
{
return VisitAllowSpecialCharactersExpression((AllowSpecialCharactersExpression) expression);
}
if (expression is LuceneQueryPredicateExpression)
{
return VisitQueryPredicateExpression((LuceneQueryPredicateExpression) expression);
}
return base.VisitExtensionExpression(expression);
}
protected override Expression VisitExtensionExpression(ExtensionExpression expression)
{
var aliasExpression = expression as AliasExpression;
if (aliasExpression != null)
{
return VisitExpression(aliasExpression.Expression);
}
var notNullableExpression = expression as NotNullableExpression;
if (notNullableExpression != null)
{
return expression;
}
var columnExpression = expression as ColumnExpression
?? expression.TryGetColumnExpression();
if (columnExpression != null
&& columnExpression.Property.IsNullable)
{
AddToResult(new IsNullExpression(expression));
return expression;
}
var isNullExpression = expression as IsNullExpression;
if (isNullExpression != null)
{
return expression;
}
var inExpression = expression as InExpression;
if (inExpression != null)
{
return expression;
}
return expression;
}
protected override Expression VisitExtensionExpression(ExtensionExpression expression)
{
return expression is NotNullableExpression
? expression
: base.VisitExtensionExpression(expression);
}
protected internal override Expression VisitExtensionExpression (ExtensionExpression expression)
{
ArgumentUtility.CheckNotNull ("expression", expression);
return Expression.Parameter (expression.Type, expression.ToString ());
}
protected internal override Expression VisitExtensionExpression(ExtensionExpression expression)
private Expression VisitChildrenWithGivenSemantics (ExtensionExpression expression, SqlExpressionContext childContext)
{
var visitor = new SqlContextExpressionVisitor (childContext, _stage, _context);
return visitor.VisitExtensionExpression (expression);
}
protected override Expression VisitExtensionExpression(ExtensionExpression expression)
{
var notNullableExpression = expression as NotNullableExpression;
return notNullableExpression != null
? expression
: base.VisitExtensionExpression(expression);
}