internal static void Analyze(LambdaExpression e, PathBox pb)
{
bool knownEntityType = CommonUtil.IsClientType(e.Body.Type);
pb.PushParamExpression(e.Parameters.Last());
if (!knownEntityType)
{
NonEntityProjectionAnalyzer.Analyze(e.Body, pb);
}
else
{
switch (e.Body.NodeType)
{
case ExpressionType.MemberInit:
EntityProjectionAnalyzer.Analyze((MemberInitExpression)e.Body, pb);
break;
case ExpressionType.New:
throw new NotSupportedException(SR.ALinqCannotConstructKnownEntityTypes);
case ExpressionType.Constant:
throw new NotSupportedException(SR.ALinqCannotCreateConstantEntity);
default:
NonEntityProjectionAnalyzer.Analyze(e.Body, pb);
break;
}
}
pb.PopParamExpression();
}
private EntityProjectionAnalyzer(PathBox pb, Type type)
{
Debug.Assert(pb != null, "pb != null");
Debug.Assert(type != null, "type != null");
this.box = pb;
this.type = type;
}
private static void AnalyzeResourceExpression(LambdaExpression lambda, ResourceExpression resource)
{
PathBox pb = new PathBox();
ProjectionAnalyzer.Analyze(lambda, pb);
resource.Projection = new ProjectionQueryOptionExpression(lambda.Body.Type, lambda, pb.ProjectionPaths.ToList());
resource.ExpandPaths = pb.ExpandPaths.Union(resource.ExpandPaths, StringComparer.Ordinal).ToList();
}
internal static void Analyze(MemberInitExpression mie, PathBox pb)
{
Debug.Assert(mie != null, "mie != null");
var epa = new EntityProjectionAnalyzer(pb, mie.Type);
MemberAssignmentAnalysis targetEntityPath = null;
foreach (MemberBinding mb in mie.Bindings)
{
MemberAssignment ma = mb as MemberAssignment;
epa.Visit(ma.Expression);
if (ma != null)
{
var analysis = MemberAssignmentAnalysis.Analyze(pb.ParamExpressionInScope, ma.Expression);
if (analysis.IncompatibleAssignmentsException != null)
{
throw analysis.IncompatibleAssignmentsException;
}
Type targetType = GetMemberType(ma.Member);
Expression[] lastExpressions = analysis.GetExpressionsBeyondTargetEntity();
if (lastExpressions.Length == 0)
{
throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, SR.ALinqExpressionNotSupportedInProjectionToEntity, targetType, ma.Expression));
}
MemberExpression lastExpression = lastExpressions[lastExpressions.Length - 1] as MemberExpression;
Debug.Assert(
!analysis.MultiplePathsFound,
"!analysis.MultiplePathsFound -- the initilizer has been visited, and cannot be empty, and expressions that can combine paths should have thrown exception during initializer analysis");
Debug.Assert(
lastExpression != null,
"lastExpression != null -- the initilizer has been visited, and cannot be empty, and the only expressions that are allowed can be formed off the parameter, so this is always correlatd");
if (lastExpression != null && (lastExpression.Member.Name != ma.Member.Name))
{
throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, SR.ALinqPropertyNamesMustMatchInProjections, lastExpression.Member.Name, ma.Member.Name));
}
analysis.CheckCompatibleAssignments(mie.Type, ref targetEntityPath);
bool targetIsEntity = CommonUtil.IsClientType(targetType);
bool sourceIsEntity = CommonUtil.IsClientType(lastExpression.Type);
if (sourceIsEntity && !targetIsEntity)
{
throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, SR.ALinqExpressionNotSupportedInProjection, targetType, ma.Expression));
}
}
}
}
private static void Analyze(MemberInitExpression mie, PathBox pb)
{
Debug.Assert(mie != null, "mie != null");
Debug.Assert(pb != null, "pb != null");
bool knownEntityType = CommonUtil.IsClientType(mie.Type);
if (knownEntityType)
{
EntityProjectionAnalyzer.Analyze(mie, pb);
}
else
{
NonEntityProjectionAnalyzer.Analyze(mie, pb);
}
}
internal static void Analyze(Expression e, PathBox pb)
{
var nepa = new NonEntityProjectionAnalyzer(pb, e.Type);
MemberInitExpression mie = e as MemberInitExpression;
if (mie != null)
{
foreach (MemberBinding mb in mie.Bindings)
{
MemberAssignment ma = mb as MemberAssignment;
if (ma != null)
{
nepa.Visit(ma.Expression);
}
}
}
else
{
nepa.Visit(e);
}
}
private NonEntityProjectionAnalyzer(PathBox pb, Type type)
{
this.box = pb;
this.type = type;
}
