public EntityPropertyMappingInfo(EntityPropertyMappingAttribute attribute, Type definingType, ClientType actualPropertyType)
{
#endif
Debug.Assert(attribute != null, "attribute != null");
Debug.Assert(definingType != null, "definingType != null");
Debug.Assert(actualPropertyType != null, "actualPropertyType != null");
this.attribute = attribute;
this.definingType = definingType;
this.actualPropertyType = actualPropertyType;
Debug.Assert(!string.IsNullOrEmpty(attribute.SourcePath), "Invalid source path");
this.segmentedSourcePath = attribute.SourcePath.Split('/');
}
public EntityPropertyMappingInfo(EntityPropertyMappingAttribute attribute, Type definingType, ClientType actualPropertyType)
{
#endif
Debug.Assert(attribute != null, "attribute != null");
Debug.Assert(definingType != null, "definingType != null");
Debug.Assert(actualPropertyType != null, "actualPropertyType != null");
this.attribute = attribute;
this.definingType = definingType;
this.actualPropertyType = actualPropertyType;
Debug.Assert(!string.IsNullOrEmpty(attribute.SourcePath), "Invalid source path");
this.segmentedSourcePath = attribute.SourcePath.Split('/');
}
internal void EnterMemberInit(MemberInitExpression init)
{
bool isEntityType = ClientType.CheckElementTypeIsEntity(init.Type);
this.entityInScope.Push(isEntityType);
}
private static BindingEntityInfoPerType GetBindingEntityInfoFor(Type entityType)
{
BindingEntityInfoPerType bindingEntityInfo;
metadataCacheLock.EnterReadLock();
try
{
if (bindingEntityInfos.TryGetValue(entityType, out bindingEntityInfo))
{
return(bindingEntityInfo);
}
}
finally
{
metadataCacheLock.ExitReadLock();
}
bindingEntityInfo = new BindingEntityInfoPerType();
object[] attributes = entityType.GetCustomAttributes(typeof(EntitySetAttribute), true);
bindingEntityInfo.EntitySet = (attributes != null && attributes.Length == 1) ? ((EntitySetAttribute)attributes[0]).EntitySet : null;
bindingEntityInfo.ClientType = ClientType.Create(entityType);
foreach (ClientType.ClientProperty p in bindingEntityInfo.ClientType.Properties)
{
BindingPropertyInfo bpi = null;
Type propertyType = p.PropertyType;
if (p.CollectionType != null)
{
if (BindingEntityInfo.IsDataServiceCollection(propertyType))
{
bpi = new BindingPropertyInfo {
PropertyKind = BindingPropertyKind.BindingPropertyKindCollection
};
}
}
else
if (BindingEntityInfo.IsEntityType(propertyType))
{
bpi = new BindingPropertyInfo {
PropertyKind = BindingPropertyKind.BindingPropertyKindEntity
};
}
else
if (BindingEntityInfo.CanBeComplexProperty(p))
{
bpi = new BindingPropertyInfo {
PropertyKind = BindingPropertyKind.BindingPropertyKindComplex
};
}
if (bpi != null)
{
bpi.PropertyInfo = p;
if (bindingEntityInfo.ClientType.IsEntityType || bpi.PropertyKind == BindingPropertyKind.BindingPropertyKindComplex)
{
bindingEntityInfo.ObservableProperties.Add(bpi);
}
}
}
metadataCacheLock.EnterWriteLock();
try
{
if (!bindingEntityInfos.ContainsKey(entityType))
{
bindingEntityInfos[entityType] = bindingEntityInfo;
}
}
finally
{
metadataCacheLock.ExitWriteLock();
}
return(bindingEntityInfo);
}
internal static LambdaExpression TryToRewrite(LambdaExpression le, Type proposedParameterType)
{
LambdaExpression result;
if (!ResourceBinder.PatternRules.MatchSingleArgumentLambda(le, out le) || ClientType.CheckElementTypeIsEntity(le.Parameters[0].Type) || !(le.Parameters[0].Type.GetProperties().Any(p => p.PropertyType == proposedParameterType)))
{
result = le;
}
else
{
ProjectionRewriter rewriter = new ProjectionRewriter(proposedParameterType);
result = rewriter.Rebind(le);
}
return(result);
}
internal override Expression VisitConditional(ConditionalExpression c)
{
var nullCheck = ResourceBinder.PatternRules.MatchNullCheck(this.box.ParamExpressionInScope, c);
if (nullCheck.Match)
{
this.Visit(nullCheck.AssignExpression);
return(c);
}
if (ClientType.CheckElementTypeIsEntity(c.Test.Type) || ClientType.CheckElementTypeIsEntity(c.IfTrue.Type) || ClientType.CheckElementTypeIsEntity(c.IfFalse.Type) ||
IsCollectionProducingExpression(c.Test) || IsCollectionProducingExpression(c.IfTrue) || IsCollectionProducingExpression(c.IfFalse))
{
throw new NotSupportedException(Strings.ALinq_ExpressionNotSupportedInProjection(this.type, c.ToString()));
}
return(base.VisitConditional(c));
}
/// <summary>Analyzes the specified member-init expression.</summary>
/// <param name="mie">Expression to analyze.</param>
/// <param name="pb">Path-tracking object to store analysis in.</param>
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;
}
// Note that an "empty" assignment on the binding is not checked/handled,
// because the funcletizer would have turned that into a constant
// in the tree, the visit earlier in this method would have thrown
// an exception at finding a constant in an entity projection.
//
// We do account however for failing to find a reference off the
// parameter entry to detect errors like this: new ET() { Ref = e }
// Here it looks like the new ET should be the parent of 'e', but
// there is nothing in scope that represents that.
//
// This also explains while error messages might be a bit misleading
// in this case (because they reference a constant when the user
// hasn't included any).
Type targetType = GetMemberType(ma.Member);
Expression[] lastExpressions = analysis.GetExpressionsBeyondTargetEntity();
if (lastExpressions.Length == 0)
{
throw new NotSupportedException(Strings.ALinq_ExpressionNotSupportedInProjectionToEntity(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(Strings.ALinq_PropertyNamesMustMatchInProjections(lastExpression.Member.Name, ma.Member.Name));
}
analysis.CheckCompatibleAssignments(mie.Type, ref targetEntityPath);
// Unless we're initializing an entity, we should not traverse into the parameter in scope.
bool targetIsEntity = ClientType.CheckElementTypeIsEntity(targetType);
bool sourceIsEntity = ClientType.CheckElementTypeIsEntity(lastExpression.Type);
if (sourceIsEntity && !targetIsEntity)
{
throw new NotSupportedException(Strings.ALinq_ExpressionNotSupportedInProjection(targetType, ma.Expression));
}
}
}
}
