internal override Expression VisitMemberAccess(MemberExpression m)
{
PropertyInfo info;
Expression expression;
Type type = m.Expression.Type;
this.leafExpressionIsMemberAccess = true;
if (PrimitiveType.IsKnownNullableType(type))
{
this.leafExpressionIsMemberAccess = false;
return(base.VisitMemberAccess(m));
}
if (ProjectionAnalyzer.IsCollectionProducingExpression(m.Expression))
{
throw new NotSupportedException(System.Data.Services.Client.Strings.ALinq_ExpressionNotSupportedInProjection(this.type, m.ToString()));
}
if (!ResourceBinder.PatternRules.MatchNonPrivateReadableProperty(m, out info, out expression))
{
throw new NotSupportedException(System.Data.Services.Client.Strings.ALinq_ExpressionNotSupportedInProjection(this.type, m.ToString()));
}
Expression expression2 = base.VisitMemberAccess(m);
if (ClientTypeUtil.TypeOrElementTypeIsEntity(type))
{
Type type2;
ResourceBinder.StripTo <Expression>(m.Expression, out type2);
this.box.AppendPropertyToPath(info, type2, this.context);
this.leafExpressionIsMemberAccess = false;
}
return(expression2);
}
internal override Expression VisitTypeIs(TypeBinaryExpression b)
{
if (ClientTypeUtil.TypeOrElementTypeIsEntity(b.Expression.Type) || ProjectionAnalyzer.IsCollectionProducingExpression(b.Expression))
{
throw new NotSupportedException(System.Data.Services.Client.Strings.ALinq_ExpressionNotSupportedInProjection(this.type, b.ToString()));
}
return(base.VisitTypeIs(b));
}
internal override Expression VisitInvocation(InvocationExpression iv)
{
if ((ClientTypeUtil.TypeOrElementTypeIsEntity(iv.Expression.Type) || ProjectionAnalyzer.IsCollectionProducingExpression(iv.Expression)) || iv.Arguments.Any <Expression>(delegate(Expression a) {
if (!ClientTypeUtil.TypeOrElementTypeIsEntity(a.Type))
{
return(ProjectionAnalyzer.IsCollectionProducingExpression(a));
}
return(true);
}))
{
throw new NotSupportedException(System.Data.Services.Client.Strings.ALinq_ExpressionNotSupportedInProjection(this.type, iv.ToString()));
}
return(base.VisitInvocation(iv));
}
internal override Expression VisitUnary(UnaryExpression u)
{
UnaryExpression expression = (UnaryExpression)base.VisitUnary(u);
Expression rewritten = expression;
this.RecordRewrite(u, rewritten);
if ((expression.NodeType != ExpressionType.Convert) && (expression.NodeType != ExpressionType.TypeAs))
{
return(rewritten);
}
if (!expression.Type.IsAssignableFrom(expression.Operand.Type))
{
return(rewritten);
}
if ((PrimitiveType.IsKnownNullableType(expression.Operand.Type) || PrimitiveType.IsKnownNullableType(expression.Type)) && !(expression.Operand.Type == expression.Type))
{
return(rewritten);
}
if (ClientTypeUtil.TypeOrElementTypeIsEntity(expression.Operand.Type) && ProjectionAnalyzer.IsCollectionProducingExpression(expression.Operand))
{
return(rewritten);
}
return(expression.Operand);
}
internal override Expression VisitConditional(ConditionalExpression c)
{
ResourceBinder.PatternRules.MatchNullCheckResult result = ResourceBinder.PatternRules.MatchNullCheck(this.box.ParamExpressionInScope, c);
if (result.Match)
{
this.Visit(result.AssignExpression);
return(c);
}
if (((ClientTypeUtil.TypeOrElementTypeIsEntity(c.Test.Type) || ClientTypeUtil.TypeOrElementTypeIsEntity(c.IfTrue.Type)) || (ClientTypeUtil.TypeOrElementTypeIsEntity(c.IfFalse.Type) || ProjectionAnalyzer.IsCollectionProducingExpression(c.Test))) || (ProjectionAnalyzer.IsCollectionProducingExpression(c.IfTrue) || ProjectionAnalyzer.IsCollectionProducingExpression(c.IfFalse)))
{
throw new NotSupportedException(System.Data.Services.Client.Strings.ALinq_ExpressionNotSupportedInProjection(this.type, c.ToString()));
}
return(base.VisitConditional(c));
}
/// <summary>
/// CODE: x
/// ORIGINAL: Convert(x, t) where t is assignable from typeof(x)
/// ORIGINAL: x as t, where t is assignable from typeof(x)
/// ORIGINAL: and typeof(x) or t are not known primitives unless typeof(x) == t
/// ORIGINAL: and x is not a collection of entity types
/// NORMALIZED: x
/// </summary>
internal override Expression VisitUnary(UnaryExpression u)
{
UnaryExpression visited = (UnaryExpression)base.VisitUnary(u);
Expression result = visited;
// Note that typically we would record a potential rewrite
// after extracting the conversion, but we avoid doing this
// because it breaks undoing the rewrite by making the non-local
// change circular, ie:
// unary [operand = a]
// becomes
// a <- unary [operand = a]
// So the undoing visits a, then the original unary, then the
// operand and again the unary, the operand, etc.
this.RecordRewrite(u, result);
// Convert(x, t) or x as t, where t is assignable from typeof(x)
if ((visited.NodeType == ExpressionType.Convert || visited.NodeType == ExpressionType.TypeAs) && visited.Type.IsAssignableFrom(visited.Operand.Type))
{
// typeof(x) or t are not known primitives unless typeof(x) == t
if (!ClientConvert.IsKnownNullableType(visited.Operand.Type) && !ClientConvert.IsKnownNullableType(visited.Type) || visited.Operand.Type == visited.Type)
{
// x is not a collection of entity types
if (!(ClientType.CheckElementTypeIsEntity(visited.Operand.Type) && ProjectionAnalyzer.IsCollectionProducingExpression(visited.Operand)))
{
result = visited.Operand;
}
}
}
return(result);
}
internal override Expression VisitUnary(UnaryExpression u)
{
UnaryExpression visited = (UnaryExpression)base.VisitUnary(u);
Expression result = visited;
this.RecordRewrite(u, result);
if ((visited.NodeType == ExpressionType.Convert || visited.NodeType == ExpressionType.TypeAs) && visited.Type.IsAssignableFrom(visited.Operand.Type))
{
if (!ClientConvert.IsKnownNullableType(visited.Operand.Type) && !ClientConvert.IsKnownNullableType(visited.Type) || visited.Operand.Type == visited.Type)
{
if (!(ClientType.CheckElementTypeIsEntity(visited.Operand.Type) && ProjectionAnalyzer.IsCollectionProducingExpression(visited.Operand)))
{
result = visited.Operand;
}
}
}
return(result);
}