internal ProjectionPathSegment(ProjectionPath startPath, string member, Type projectionType)
{
Debug.Assert(startPath != null, "startPath != null");
this.Member = member;
this.StartPath = startPath;
this.ProjectionType = projectionType;
}
/// <summary>Initializes a new <see cref="ProjectionPathSegment"/> instance.</summary>
/// <param name="startPath">Path on which this segment is located.</param>
/// <param name="member">Name of member to access when traversing a property; possibly null.</param>
/// <param name="projectionType">
/// Type that we expect to project out; typically the same as <paramref name="member"/>, but may be adjusted.
/// </param>
internal ProjectionPathSegment(ProjectionPath startPath, string member, Type projectionType)
{
Debug.Assert(startPath != null, "startPath != null");
this.Member = member;
this.StartPath = startPath;
this.ProjectionType = projectionType;
}
internal ProjectionPathSegment(ProjectionPath startPath, MemberExpression memberExpression)
{
this.StartPath = startPath;
Expression expression = ResourceBinder.StripTo<Expression>(memberExpression.Expression);
this.Member = memberExpression.Member.Name;
this.ProjectionType = memberExpression.Type;
this.SourceTypeAs = (expression.NodeType == ExpressionType.TypeAs) ? expression.Type : null;
}
private Expression CallValueForPathWithType(Expression entry, Expression entryType, ProjectionPath path, Type type)
{
Expression key = Expression.Convert(this.CallValueForPath(entry, entryType, path), type);
ExpressionAnnotation annotation = new ExpressionAnnotation {
Segment = path[path.Count - 1]
};
this.annotations.Add(key, annotation);
return key;
}
private Expression CallValueForPath(Expression entry, Expression entryType, ProjectionPath path)
{
Expression key = CallMaterializer("ProjectionValueForPath", new Expression[] { this.materializerExpression, entry, entryType, Expression.Constant(path, typeof(object)) });
ExpressionAnnotation annotation = new ExpressionAnnotation {
Segment = path[path.Count - 1]
};
this.annotations.Add(key, annotation);
return key;
}
/// <summary>Initializes a new <see cref="ProjectionPathSegment"/> instance.</summary>
/// <param name="startPath">Path on which this segment is located.</param>
/// <param name="memberExpression">Member expression for the projection path; possibly null.</param>
internal ProjectionPathSegment(ProjectionPath startPath, MemberExpression memberExpression)
{
Debug.Assert(startPath != null, "startPath != null");
Debug.Assert(memberExpression != null, "memberExpression != null");
this.StartPath = startPath;
Expression source = ResourceBinder.StripTo<Expression>(memberExpression.Expression);
this.Member = ClientTypeUtil.GetServerDefinedName(memberExpression.Member);
this.ProjectionType = memberExpression.Type;
this.SourceTypeAs = source.NodeType == ExpressionType.TypeAs ? source.Type : null;
}
/// <summary>Initializes a new <see cref="ProjectionPathSegment"/> instance.</summary>
/// <param name="startPath">Path on which this segment is located.</param>
/// <param name="memberExpression">Member expression for the projection path; possibly null.</param>
internal ProjectionPathSegment(ProjectionPath startPath, MemberExpression memberExpression)
{
Debug.Assert(startPath != null, "startPath != null");
Debug.Assert(memberExpression != null, "memberExpression != null");
this.StartPath = startPath;
Expression source = ResourceBinder.StripTo <Expression>(memberExpression.Expression);
this.Member = ClientTypeUtil.GetServerDefinedName(memberExpression.Member);
this.ProjectionType = memberExpression.Type;
this.SourceTypeAs = source.NodeType == ExpressionType.TypeAs ? source.Type : null;
}
/// <summary>Rebinds the specified parameter expression as a path-based access.</summary>
/// <param name="expression">Expression to rebind.</param>
/// <param name='annotation'>Annotation for the expression to rebind.</param>
/// <returns>The rebound expression.</returns>
private Expression RebindParameter(Expression expression, ExpressionAnnotation annotation)
{
Debug.Assert(expression != null, "expression != null");
Debug.Assert(annotation != null, "annotation != null");
Expression result;
result = this.CallValueForPathWithType(
annotation.Segment.StartPath.RootEntry,
annotation.Segment.StartPath.ExpectedRootType,
annotation.Segment.StartPath,
expression.Type);
// Refresh the annotation so the next one that comes along
// doesn't start off with an already-written path.
ProjectionPath parameterPath = new ProjectionPath(
annotation.Segment.StartPath.Root,
annotation.Segment.StartPath.ExpectedRootType,
annotation.Segment.StartPath.RootEntry);
ProjectionPathSegment parameterSegment = new ProjectionPathSegment(parameterPath, null, null);
parameterPath.Add(parameterSegment);
this.annotations[expression] = new ExpressionAnnotation() { Segment = parameterSegment };
return result;
}
/// <summary>Creates an expression that calls ProjectionValueForPath.</summary>
/// <param name="entry">Expression for root entry for paths.</param>
/// <param name="entryType">Expression for expected type for entry.</param>
/// <param name="path">Path to pull value from.</param>
/// <param name="type">Path to convert result for.</param>
/// <returns>A new expression with the call instance.</returns>
private Expression CallValueForPathWithType(Expression entry, Expression entryType, ProjectionPath path, Type type)
{
Debug.Assert(entry != null, "entry != null");
Debug.Assert(path != null, "path != null");
Expression value = this.CallValueForPath(entry, entryType, path);
Expression result = Expression.Convert(value, type);
this.annotations.Add(result, new ExpressionAnnotation() { Segment = path[path.Count - 1] });
return result;
}
/// <summary>Creates an expression that calls ProjectionCheckValueForPathIsNull.</summary>
/// <param name="entry">Expression for root entry for paths.</param>
/// <param name="entryType">Expression for expected type for entry.</param>
/// <param name="path">Path to check null value for.</param>
/// <returns>A new expression with the call instance.</returns>
private Expression CallCheckValueForPathIsNull(Expression entry, Expression entryType, ProjectionPath path)
{
Expression result = CallMaterializer("ProjectionCheckValueForPathIsNull", entry, entryType, Expression.Constant(path, typeof(object)));
this.annotations.Add(result, new ExpressionAnnotation() { Segment = path[path.Count - 1] });
return result;
}
internal static object ProjectionValueForPath(ODataEntityMaterializer materializer, MaterializerEntry entry, Type expectedType, ProjectionPath path)
{
if ((path.Count == 0) || ((path.Count == 1) && (path[0].Member == null)))
{
if (!entry.EntityHasBeenResolved)
{
materializer.Materialize(entry, expectedType, false);
}
return(entry.ResolvedObject);
}
object streamLink = null;
ODataNavigationLink link = null;
ODataProperty atomProperty = null;
ICollection <ODataNavigationLink> navigationLinks = entry.NavigationLinks;
IEnumerable <ODataProperty> properties = entry.Entry.Properties;
ClientEdmModel model = ClientEdmModel.GetModel(materializer.ResponseInfo.MaxProtocolVersion);
for (int i = 0; i < path.Count; i++)
{
Func <StreamDescriptor, bool> predicate = null;
Func <ODataNavigationLink, bool> func2 = null;
Func <ODataProperty, bool> func3 = null;
Func <ODataProperty, bool> func4 = null;
Func <ODataNavigationLink, bool> func5 = null;
string propertyName;
ProjectionPathSegment segment = path[i];
if (segment.Member != null)
{
bool flag = i == (path.Count - 1);
propertyName = segment.Member;
expectedType = segment.SourceTypeAs ?? expectedType;
ClientPropertyAnnotation property = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(expectedType)).GetProperty(propertyName, false);
if (property.IsStreamLinkProperty)
{
if (predicate == null)
{
predicate = sd => sd.Name == propertyName;
}
StreamDescriptor descriptor = entry.EntityDescriptor.StreamDescriptors.Where <StreamDescriptor>(predicate).SingleOrDefault <StreamDescriptor>();
if (descriptor == null)
{
if (segment.SourceTypeAs == null)
{
throw new InvalidOperationException(System.Data.Services.Client.Strings.AtomMaterializer_PropertyMissing(propertyName, entry.Entry.Id));
}
return(WebUtil.GetDefaultValue <DataServiceStreamLink>());
}
streamLink = descriptor.StreamLink;
}
else
{
if (segment.SourceTypeAs != null)
{
if (func2 == null)
{
func2 = p => p.Name == propertyName;
}
if (!navigationLinks.Any <ODataNavigationLink>(func2))
{
if (func3 == null)
{
func3 = p => p.Name == propertyName;
}
if (!properties.Any <ODataProperty>(func3) && flag)
{
return(WebUtil.GetDefaultValue(property.PropertyType));
}
}
}
if (func4 == null)
{
func4 = p => p.Name == propertyName;
}
atomProperty = properties.Where <ODataProperty>(func4).FirstOrDefault <ODataProperty>();
if (func5 == null)
{
func5 = p => p.Name == propertyName;
}
link = ((atomProperty == null) && (navigationLinks != null)) ? navigationLinks.Where <ODataNavigationLink>(func5).FirstOrDefault <ODataNavigationLink>() : null;
if ((link == null) && (atomProperty == null))
{
throw new InvalidOperationException(System.Data.Services.Client.Strings.AtomMaterializer_PropertyMissing(propertyName, entry.Entry.Id));
}
if (link != null)
{
ValidatePropertyMatch(property, link);
MaterializerNavigationLink link2 = MaterializerNavigationLink.GetLink(link);
if (link2.Feed != null)
{
MaterializerFeed feed = MaterializerFeed.GetFeed(link2.Feed);
Type implementationType = ClientTypeUtil.GetImplementationType(segment.ProjectionType, typeof(ICollection <>));
if (implementationType == null)
{
implementationType = ClientTypeUtil.GetImplementationType(segment.ProjectionType, typeof(IEnumerable <>));
}
Type nestedExpectedType = implementationType.GetGenericArguments()[0];
Type projectionType = segment.ProjectionType;
if (projectionType.IsInterfaceEx() || ODataMaterializer.IsDataServiceCollection(projectionType))
{
projectionType = typeof(Collection <>).MakeGenericType(new Type[] { nestedExpectedType });
}
IEnumerable list = (IEnumerable)Util.ActivatorCreateInstance(projectionType, new object[0]);
MaterializeToList(materializer, list, nestedExpectedType, feed.Entries);
if (ODataMaterializer.IsDataServiceCollection(segment.ProjectionType))
{
list = (IEnumerable)Util.ActivatorCreateInstance(WebUtil.GetDataServiceCollectionOfT(new Type[] { nestedExpectedType }), new object[] { list, TrackingMode.None });
}
ProjectionPlan plan = CreatePlanForShallowMaterialization(nestedExpectedType);
materializer.FoundNextLinkForCollection(list, feed.Feed.NextPageLink, plan);
streamLink = list;
}
else if (link2.Entry != null)
{
MaterializerEntry entry2 = link2.Entry;
if (flag)
{
if ((entry2.Entry != null) && !entry2.EntityHasBeenResolved)
{
materializer.Materialize(entry2, property.PropertyType, false);
}
}
else
{
CheckEntryToAccessNotNull(entry2, propertyName);
}
properties = entry2.Properties;
navigationLinks = entry2.NavigationLinks;
streamLink = entry2.ResolvedObject;
entry = entry2;
}
}
else
{
if (atomProperty.Value is ODataStreamReferenceValue)
{
streamLink = null;
navigationLinks = ODataMaterializer.EmptyLinks;
properties = ODataMaterializer.EmptyProperties;
continue;
}
ValidatePropertyMatch(property, atomProperty);
if (ClientTypeUtil.TypeOrElementTypeIsEntity(property.PropertyType))
{
throw System.Data.Services.Client.Error.InvalidOperation(System.Data.Services.Client.Strings.AtomMaterializer_InvalidEntityType(property.EntityCollectionItemType ?? property.PropertyType));
}
if (property.IsPrimitiveOrComplexCollection)
{
object instance = streamLink ?? (entry.ResolvedObject ?? Util.ActivatorCreateInstance(expectedType, new object[0]));
ODataMaterializer.ApplyDataValue(model.GetClientTypeAnnotation(model.GetOrCreateEdmType(instance.GetType())), atomProperty, materializer.ResponseInfo.IgnoreMissingProperties, materializer.ResponseInfo, instance);
navigationLinks = ODataMaterializer.EmptyLinks;
properties = ODataMaterializer.EmptyProperties;
}
else if (atomProperty.Value is ODataComplexValue)
{
ODataComplexValue complexValue = atomProperty.Value as ODataComplexValue;
ODataMaterializer.MaterializeComplexTypeProperty(property.PropertyType, complexValue, materializer.ResponseInfo.IgnoreMissingProperties, materializer.ResponseInfo);
properties = complexValue.Properties;
navigationLinks = ODataMaterializer.EmptyLinks;
}
else
{
if ((atomProperty.Value == null) && !ClientTypeUtil.CanAssignNull(property.NullablePropertyType))
{
throw new InvalidOperationException(System.Data.Services.Client.Strings.AtomMaterializer_CannotAssignNull(atomProperty.Name, property.NullablePropertyType));
}
ODataMaterializer.MaterializePrimitiveDataValue(property.NullablePropertyType, atomProperty);
navigationLinks = ODataMaterializer.EmptyLinks;
properties = ODataMaterializer.EmptyProperties;
}
streamLink = atomProperty.GetMaterializedValue();
}
}
expectedType = property.PropertyType;
}
}
return(streamLink);
}
private Expression RebindParameter(Expression expression, ExpressionAnnotation annotation)
{
Debug.Assert(expression != null, "expression != null");
Debug.Assert(annotation != null, "annotation != null");
Expression result;
result = this.CallValueForPathWithType(
annotation.Segment.StartPath.RootEntry,
annotation.Segment.StartPath.ExpectedRootType,
annotation.Segment.StartPath,
expression.Type);
ProjectionPath parameterPath = new ProjectionPath(
annotation.Segment.StartPath.Root,
annotation.Segment.StartPath.ExpectedRootType,
annotation.Segment.StartPath.RootEntry);
ProjectionPathSegment parameterSegment = new ProjectionPathSegment(parameterPath, null, null);
parameterPath.Add(parameterSegment);
this.annotations[expression] = new ExpressionAnnotation() { Segment = parameterSegment };
return result;
}
private Expression RebindEntityMemberInit(MemberInitExpression init)
{
Debug.Assert(init != null, "init != null");
Debug.Assert(init.Bindings.Count > 0, "init.Bindings.Count > 0 -- otherwise this is just empty construction");
Expression[] expressions;
if (!this.pathBuilder.HasRewrites)
{
MemberAssignmentAnalysis propertyAnalysis = MemberAssignmentAnalysis.Analyze(
this.pathBuilder.LambdaParameterInScope,
((MemberAssignment)init.Bindings[0]).Expression);
expressions = propertyAnalysis.GetExpressionsToTargetEntity();
Debug.Assert(expressions.Length != 0, "expressions.Length != 0 -- otherwise there is no correlation to parameter in entity member init");
}
else
{
expressions = MemberAssignmentAnalysis.EmptyExpressionArray;
}
Expression entryParameterAtMemberInit = this.pathBuilder.ParameterEntryInScope;
List<string> propertyNames = new List<string>();
List<Func<object, object, Type, object>> propertyFunctions = new List<Func<object, object, Type, object>>();
Type projectedType = init.NewExpression.Type;
Expression projectedTypeExpression = Expression.Constant(projectedType, typeof(Type));
Expression entryToInitValue; Expression expectedParamValue; ParameterExpression entryParameterForMembers; ParameterExpression expectedParameterForMembers; string[] expressionNames = expressions.Skip(1).Select(e => ((MemberExpression)e).Member.Name).ToArray();
if (expressions.Length <= 1)
{
entryToInitValue = this.pathBuilder.ParameterEntryInScope;
expectedParamValue = this.pathBuilder.ExpectedParamTypeInScope;
entryParameterForMembers = (ParameterExpression)this.pathBuilder.ParameterEntryInScope;
expectedParameterForMembers = (ParameterExpression)this.pathBuilder.ExpectedParamTypeInScope;
}
else
{
entryToInitValue = this.GetDeepestEntry(expressions);
expectedParamValue = projectedTypeExpression;
entryParameterForMembers = Expression.Parameter(typeof(object), "subentry" + this.identifierId++);
expectedParameterForMembers = (ParameterExpression)this.pathBuilder.ExpectedParamTypeInScope;
ProjectionPath entryPath = new ProjectionPath(
(ParameterExpression)this.pathBuilder.LambdaParameterInScope,
this.pathBuilder.ExpectedParamTypeInScope,
this.pathBuilder.ParameterEntryInScope,
expressions.Skip(1));
this.annotations.Add(entryToInitValue, new ExpressionAnnotation() { Segment = entryPath[entryPath.Count - 1] });
this.annotations.Add(entryParameterForMembers, new ExpressionAnnotation() { Segment = entryPath[entryPath.Count - 1] });
this.pathBuilder.RegisterRewrite(this.pathBuilder.LambdaParameterInScope, expressionNames, entryParameterForMembers);
}
for (int i = 0; i < init.Bindings.Count; i++)
{
MemberAssignment assignment = (MemberAssignment)init.Bindings[i];
propertyNames.Add(assignment.Member.Name);
LambdaExpression propertyLambda;
if ((ClientType.CheckElementTypeIsEntity(assignment.Member.ReflectedType) &&
assignment.Expression.NodeType == ExpressionType.MemberInit))
{
Expression nestedEntry = CallMaterializer(
"ProjectionGetEntry",
entryParameterAtMemberInit,
Expression.Constant(assignment.Member.Name, typeof(string)));
ParameterExpression nestedEntryParameter = Expression.Parameter(
typeof(object),
"subentry" + this.identifierId++);
ProjectionPath entryPath;
ExpressionAnnotation entryAnnotation;
if (this.annotations.TryGetValue(this.pathBuilder.ParameterEntryInScope, out entryAnnotation))
{
entryPath = new ProjectionPath(
(ParameterExpression)this.pathBuilder.LambdaParameterInScope,
this.pathBuilder.ExpectedParamTypeInScope,
entryParameterAtMemberInit);
entryPath.AddRange(entryAnnotation.Segment.StartPath);
}
else
{
entryPath = new ProjectionPath(
(ParameterExpression)this.pathBuilder.LambdaParameterInScope,
this.pathBuilder.ExpectedParamTypeInScope,
entryParameterAtMemberInit,
expressions.Skip(1));
}
ProjectionPathSegment nestedSegment = new ProjectionPathSegment(
entryPath,
assignment.Member.Name,
assignment.Member.ReflectedType);
entryPath.Add(nestedSegment);
string[] names = (entryPath.Where(m => m.Member != null).Select(m => m.Member)).ToArray();
this.annotations.Add(nestedEntryParameter, new ExpressionAnnotation() { Segment = nestedSegment });
this.pathBuilder.RegisterRewrite(this.pathBuilder.LambdaParameterInScope, names, nestedEntryParameter);
Expression e = this.Visit(assignment.Expression);
this.pathBuilder.RevokeRewrite(this.pathBuilder.LambdaParameterInScope, names);
this.annotations.Remove(nestedEntryParameter);
e = Expression.Convert(e, typeof(object));
ParameterExpression[] parameters =
new ParameterExpression[]
{
this.materializerExpression,
nestedEntryParameter,
expectedParameterForMembers,
};
propertyLambda = Expression.Lambda(e, parameters);
Expression[] nestedParams =
new Expression[]
{
this.materializerExpression,
nestedEntry,
expectedParameterForMembers,
};
var invokeParameters =
new ParameterExpression[]
{
this.materializerExpression,
(ParameterExpression)entryParameterAtMemberInit,
expectedParameterForMembers,
};
propertyLambda = Expression.Lambda(Expression.Invoke(propertyLambda, nestedParams), invokeParameters);
}
else
{
Expression e = this.Visit(assignment.Expression);
e = Expression.Convert(e, typeof(object));
ParameterExpression[] parameters =
new ParameterExpression[]
{
this.materializerExpression,
entryParameterForMembers,
expectedParameterForMembers,
};
propertyLambda = Expression.Lambda(e, parameters);
}
#if TRACE_CLIENT_PROJECTIONS
Trace.WriteLine("Compiling lambda for " + assignment.Member.Name + ": " + propertyLambda);
#endif
propertyFunctions.Add((Func<object, object, Type, object>) propertyLambda.Compile());
}
for (int i = 1; i < expressions.Length; i++)
{
this.pathBuilder.RevokeRewrite(this.pathBuilder.LambdaParameterInScope, expressionNames);
this.annotations.Remove(entryToInitValue);
this.annotations.Remove(entryParameterForMembers);
}
Expression reboundExpression = CallMaterializer(
"ProjectionInitializeEntity",
this.materializerExpression,
entryToInitValue,
expectedParamValue,
projectedTypeExpression,
Expression.Constant(propertyNames.ToArray()),
Expression.Constant(propertyFunctions.ToArray()));
return Expression.Convert(reboundExpression, projectedType);
}
internal ProjectionPathSegment(ProjectionPath startPath, string member, Type projectionType)
{
this.Member = member;
this.StartPath = startPath;
this.ProjectionType = projectionType;
}
internal static bool ProjectionCheckValueForPathIsNull(MaterializerEntry entry, Type expectedType, ProjectionPath path)
{
if ((path.Count == 0) || ((path.Count == 1) && (path[0].Member == null)))
{
return(entry.Entry == null);
}
bool flag = false;
MaterializerNavigationLink link = null;
IEnumerable <ODataNavigationLink> navigationLinks = entry.NavigationLinks;
ClientEdmModel model = ClientEdmModel.GetModel(entry.EntityDescriptor.MaxProtocolVersion);
for (int i = 0; i < path.Count; i++)
{
Func <ODataNavigationLink, bool> predicate = null;
string propertyName;
ProjectionPathSegment segment = path[i];
if (segment.Member != null)
{
bool flag2 = i == (path.Count - 1);
propertyName = segment.Member;
if (segment.SourceTypeAs != null)
{
expectedType = segment.SourceTypeAs;
if (predicate == null)
{
predicate = p => p.Name == propertyName;
}
if (!navigationLinks.Any <ODataNavigationLink>(predicate))
{
return(true);
}
}
IEdmType orCreateEdmType = model.GetOrCreateEdmType(expectedType);
ClientPropertyAnnotation property = model.GetClientTypeAnnotation(orCreateEdmType).GetProperty(propertyName, false);
link = GetPropertyOrThrow(navigationLinks, propertyName, entry.Id);
ValidatePropertyMatch(property, link.Link);
if (link.Feed != null)
{
flag = false;
}
else
{
if (link.Entry == null)
{
return(true);
}
if (flag2)
{
flag = link.Entry.Entry == null;
}
else
{
entry = link.Entry;
navigationLinks = entry.NavigationLinks;
}
}
expectedType = property.PropertyType;
}
}
return(flag);
}
internal static IEnumerable ProjectionSelect(ODataEntityMaterializer materializer, MaterializerEntry entry, Type expectedType, Type resultType, ProjectionPath path, Func <object, object, Type, object> selector)
{
ClientEdmModel model = ClientEdmModel.GetModel(materializer.ResponseInfo.MaxProtocolVersion);
ClientTypeAnnotation clientTypeAnnotation = entry.ActualType ?? model.GetClientTypeAnnotation(model.GetOrCreateEdmType(expectedType));
IEnumerable enumerable = (IEnumerable)Util.ActivatorCreateInstance(typeof(List <>).MakeGenericType(new Type[] { resultType }), new object[0]);
MaterializerNavigationLink link = null;
ClientPropertyAnnotation property = null;
for (int i = 0; i < path.Count; i++)
{
ProjectionPathSegment segment = path[i];
if (segment.SourceTypeAs != null)
{
clientTypeAnnotation = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(segment.SourceTypeAs));
}
if (segment.Member != null)
{
string member = segment.Member;
property = clientTypeAnnotation.GetProperty(member, false);
link = GetPropertyOrThrow(entry.NavigationLinks, member, entry.Id);
if (link.Entry != null)
{
entry = link.Entry;
clientTypeAnnotation = model.GetClientTypeAnnotation(model.GetOrCreateEdmType(property.PropertyType));
}
}
}
ValidatePropertyMatch(property, link.Link);
MaterializerFeed feed = MaterializerFeed.GetFeed(link.Feed);
Action <object, object> addToCollectionDelegate = ODataMaterializer.GetAddToCollectionDelegate(enumerable.GetType());
foreach (ODataEntry entry2 in feed.Entries)
{
object obj2 = selector(materializer, entry2, property.EntityCollectionItemType);
addToCollectionDelegate(enumerable, obj2);
}
ProjectionPlan plan = new ProjectionPlan {
LastSegmentType = property.EntityCollectionItemType,
Plan = selector,
ProjectedType = resultType
};
materializer.FoundNextLinkForCollection(enumerable, feed.NextPageLink, plan);
return(enumerable);
}
private Expression RebindMemberAccess(MemberExpression m, ExpressionAnnotation baseAnnotation)
{
Debug.Assert(m != null, "m != null");
Debug.Assert(baseAnnotation != null, "baseAnnotation != null");
ProjectionPathSegment memberSegment;
Expression baseSourceExpression = m.Expression;
Expression result = this.pathBuilder.GetRewrite(baseSourceExpression);
if (result != null)
{
Expression baseTypeExpression = Expression.Constant(baseSourceExpression.Type, typeof(Type));
ProjectionPath nestedPath = new ProjectionPath(result as ParameterExpression, baseTypeExpression, result);
ProjectionPathSegment nestedSegment = new ProjectionPathSegment(nestedPath, m.Member.Name, m.Type);
nestedPath.Add(nestedSegment);
result = this.CallValueForPathWithType(result, baseTypeExpression, nestedPath, m.Type);
}
else
{
memberSegment = new ProjectionPathSegment(baseAnnotation.Segment.StartPath, m.Member.Name, m.Type);
baseAnnotation.Segment.StartPath.Add(memberSegment);
result = this.CallValueForPathWithType(
baseAnnotation.Segment.StartPath.RootEntry,
baseAnnotation.Segment.StartPath.ExpectedRootType,
baseAnnotation.Segment.StartPath,
m.Type);
}
return result;
}
/// <summary>LambdaExpression visit method.</summary>
/// <param name="lambda">The LambdaExpression to visit</param>
/// <returns>The visited LambdaExpression</returns>
internal override Expression VisitLambda(LambdaExpression lambda)
{
Debug.Assert(lambda != null, "lambda != null");
Expression result;
if (!this.topLevelProjectionFound || lambda.Parameters.Count == 1 && ClientType.CheckElementTypeIsEntity(lambda.Parameters[0].Type))
{
this.topLevelProjectionFound = true;
ParameterExpression expectedTypeParameter = Expression.Parameter(typeof(Type), "type" + this.identifierId);
ParameterExpression entryParameter = Expression.Parameter(typeof(object), "entry" + this.identifierId);
this.identifierId++;
this.pathBuilder.EnterLambdaScope(lambda, entryParameter, expectedTypeParameter);
ProjectionPath parameterPath = new ProjectionPath(lambda.Parameters[0], expectedTypeParameter, entryParameter);
ProjectionPathSegment parameterSegment = new ProjectionPathSegment(parameterPath, null, null);
parameterPath.Add(parameterSegment);
this.annotations[lambda.Parameters[0]] = new ExpressionAnnotation() { Segment = parameterSegment };
Expression body = this.Visit(lambda.Body);
// Value types must be boxed explicitly; the lambda initialization
// won't do it for us (type-compatible types still work, so all
// references will work fine with System.Object).
if (body.Type.IsValueType)
{
body = Expression.Convert(body, typeof(object));
}
result = Expression.Lambda<Func<object, object, Type, object>>(
body,
this.materializerExpression,
entryParameter,
expectedTypeParameter);
this.pathBuilder.LeaveLambdaScope();
}
else
{
result = base.VisitLambda(lambda);
}
return result;
}
private Expression RebindEntityMemberInit(MemberInitExpression init)
{
Expression[] expressionsToTargetEntity;
Expression deepestEntry;
Expression expectedParamTypeInScope;
ParameterExpression expression5;
ParameterExpression expression6;
if (!this.pathBuilder.HasRewrites)
{
expressionsToTargetEntity = MemberAssignmentAnalysis.Analyze(this.pathBuilder.LambdaParameterInScope, ((MemberAssignment) init.Bindings[0]).Expression).GetExpressionsToTargetEntity();
}
else
{
expressionsToTargetEntity = MemberAssignmentAnalysis.EmptyExpressionArray;
}
Expression parameterEntryInScope = this.pathBuilder.ParameterEntryInScope;
List<string> list = new List<string>();
List<Func<object, object, Type, object>> list2 = new List<Func<object, object, Type, object>>();
Type type = init.NewExpression.Type;
Expression expression2 = Expression.Constant(type, typeof(Type));
string[] names = (from e in expressionsToTargetEntity.Skip<Expression>(1) select ((MemberExpression) e).Member.Name).ToArray<string>();
if (expressionsToTargetEntity.Length <= 1)
{
deepestEntry = this.pathBuilder.ParameterEntryInScope;
expectedParamTypeInScope = this.pathBuilder.ExpectedParamTypeInScope;
expression5 = (ParameterExpression) this.pathBuilder.ParameterEntryInScope;
expression6 = (ParameterExpression) this.pathBuilder.ExpectedParamTypeInScope;
}
else
{
deepestEntry = this.GetDeepestEntry(expressionsToTargetEntity);
expectedParamTypeInScope = expression2;
expression5 = Expression.Parameter(typeof(object), "subentry" + this.identifierId++);
expression6 = (ParameterExpression) this.pathBuilder.ExpectedParamTypeInScope;
ProjectionPath path = new ProjectionPath((ParameterExpression) this.pathBuilder.LambdaParameterInScope, this.pathBuilder.ExpectedParamTypeInScope, this.pathBuilder.ParameterEntryInScope, expressionsToTargetEntity.Skip<Expression>(1));
ExpressionAnnotation annotation = new ExpressionAnnotation {
Segment = path[path.Count - 1]
};
this.annotations.Add(deepestEntry, annotation);
ExpressionAnnotation annotation2 = new ExpressionAnnotation {
Segment = path[path.Count - 1]
};
this.annotations.Add(expression5, annotation2);
this.pathBuilder.RegisterRewrite(this.pathBuilder.LambdaParameterInScope, names, expression5);
}
for (int i = 0; i < init.Bindings.Count; i++)
{
LambdaExpression expression7;
MemberAssignment assignment = (MemberAssignment) init.Bindings[i];
list.Add(assignment.Member.Name);
if (ClientTypeUtil.TypeOrElementTypeIsEntity(ClientTypeUtil.GetMemberType(assignment.Member)) && (assignment.Expression.NodeType == ExpressionType.MemberInit))
{
ProjectionPath path2;
ExpressionAnnotation annotation3;
Expression expression8 = CallMaterializer("ProjectionGetEntry", new Expression[] { parameterEntryInScope, Expression.Constant(assignment.Member.Name, typeof(string)) });
ParameterExpression key = Expression.Parameter(typeof(object), "subentry" + this.identifierId++);
if (this.annotations.TryGetValue(this.pathBuilder.ParameterEntryInScope, out annotation3))
{
path2 = new ProjectionPath((ParameterExpression) this.pathBuilder.LambdaParameterInScope, this.pathBuilder.ExpectedParamTypeInScope, parameterEntryInScope);
path2.AddRange(annotation3.Segment.StartPath);
}
else
{
path2 = new ProjectionPath((ParameterExpression) this.pathBuilder.LambdaParameterInScope, this.pathBuilder.ExpectedParamTypeInScope, parameterEntryInScope, expressionsToTargetEntity.Skip<Expression>(1));
}
Type reflectedType = assignment.Member.ReflectedType;
ProjectionPathSegment item = new ProjectionPathSegment(path2, assignment.Member.Name, reflectedType);
path2.Add(item);
string[] strArray2 = (from m in path2
where m.Member != null
select m.Member).ToArray<string>();
ExpressionAnnotation annotation4 = new ExpressionAnnotation {
Segment = item
};
this.annotations.Add(key, annotation4);
this.pathBuilder.RegisterRewrite(this.pathBuilder.LambdaParameterInScope, strArray2, key);
Expression expression = this.Visit(assignment.Expression);
this.pathBuilder.RevokeRewrite(this.pathBuilder.LambdaParameterInScope, strArray2);
this.annotations.Remove(key);
expression = Expression.Convert(expression, typeof(object));
ParameterExpression[] parameters = new ParameterExpression[] { this.materializerExpression, key, expression6 };
expression7 = Expression.Lambda(expression, parameters);
Expression[] arguments = new Expression[] { this.materializerExpression, expression8, expression6 };
ParameterExpression[] expressionArray4 = new ParameterExpression[] { this.materializerExpression, (ParameterExpression) parameterEntryInScope, expression6 };
expression7 = Expression.Lambda(Expression.Invoke(expression7, arguments), expressionArray4);
}
else
{
Expression body = Expression.Convert(this.Visit(assignment.Expression), typeof(object));
ParameterExpression[] expressionArray5 = new ParameterExpression[] { this.materializerExpression, expression5, expression6 };
expression7 = Expression.Lambda(body, expressionArray5);
}
list2.Add((Func<object, object, Type, object>) expression7.Compile());
}
for (int j = 1; j < expressionsToTargetEntity.Length; j++)
{
this.pathBuilder.RevokeRewrite(this.pathBuilder.LambdaParameterInScope, names);
this.annotations.Remove(deepestEntry);
this.annotations.Remove(expression5);
}
return Expression.Convert(CallMaterializer("ProjectionInitializeEntity", new Expression[] { this.materializerExpression, deepestEntry, expectedParamTypeInScope, expression2, Expression.Constant(list.ToArray()), Expression.Constant(list2.ToArray()) }), type);
}
/// <summary>Creates an expression that calls ProjectionValueForPath.</summary>
/// <param name="entry">Expression for root entry for paths.</param>
/// <param name="entryType">Expression for expected type for entry.</param>
/// <param name="path">Path to pull value from.</param>
/// <returns>A new expression with the call instance.</returns>
private Expression CallValueForPath(Expression entry, Expression entryType, ProjectionPath path)
{
Debug.Assert(entry != null, "entry != null");
Debug.Assert(path != null, "path != null");
Expression result = CallMaterializer("ProjectionValueForPath", this.materializerExpression, entry, entryType, Expression.Constant(path, typeof(object)));
this.annotations.Add(result, new ExpressionAnnotation() { Segment = path[path.Count - 1] });
return result;
}
private Expression RebindMemberAccess(MemberExpression m, ExpressionAnnotation baseAnnotation)
{
Expression expression = m.Expression;
Expression rewrite = this.pathBuilder.GetRewrite(expression);
if (rewrite != null)
{
Expression expectedRootType = Expression.Constant(expression.Type, typeof(Type));
ProjectionPath startPath = new ProjectionPath(rewrite as ParameterExpression, expectedRootType, rewrite);
ProjectionPathSegment segment2 = new ProjectionPathSegment(startPath, m);
startPath.Add(segment2);
return this.CallValueForPathWithType(rewrite, expectedRootType, startPath, m.Type);
}
ProjectionPathSegment item = new ProjectionPathSegment(baseAnnotation.Segment.StartPath, m);
baseAnnotation.Segment.StartPath.Add(item);
return this.CallValueForPathWithType(baseAnnotation.Segment.StartPath.RootEntry, baseAnnotation.Segment.StartPath.ExpectedRootType, baseAnnotation.Segment.StartPath, m.Type);
}
/// <summary>
/// Rebinds the specified <paramref name="init"/> expression by gathering
/// annotated paths and returning an expression that calls the
/// ProjectionGetEntity method.
/// </summary>
/// <param name="init">Member initialization expression.</param>
/// <returns>A new expression suitable for materialization.</returns>
private Expression RebindEntityMemberInit(MemberInitExpression init)
{
Debug.Assert(init != null, "init != null");
Debug.Assert(init.Bindings.Count > 0, "init.Bindings.Count > 0 -- otherwise this is just empty construction");
// We "jump" into entities only if we're not already materializing an entity.
Expression[] expressions;
if (!this.pathBuilder.HasRewrites)
{
MemberAssignmentAnalysis propertyAnalysis = MemberAssignmentAnalysis.Analyze(
this.pathBuilder.LambdaParameterInScope,
((MemberAssignment)init.Bindings[0]).Expression);
expressions = propertyAnalysis.GetExpressionsToTargetEntity();
Debug.Assert(expressions.Length != 0, "expressions.Length != 0 -- otherwise there is no correlation to parameter in entity member init");
}
else
{
expressions = MemberAssignmentAnalysis.EmptyExpressionArray;
}
Expression entryParameterAtMemberInit = this.pathBuilder.ParameterEntryInScope;
List<string> propertyNames = new List<string>();
List<Func<object, object, Type, object>> propertyFunctions = new List<Func<object, object, Type, object>>();
Type projectedType = init.NewExpression.Type;
Expression projectedTypeExpression = Expression.Constant(projectedType, typeof(Type));
// We may need to materialize from deeper in the entity tree for anonymous types.
// t => new { nested = new Nested() { nid = t.nested.nid }
//
// We do the same kind of rewriting we'd do for a nested entity
// but at the initializing scope (rather than at the member assignment scope).
//
// t=> new { nested = ProjInit(GetEntry(entry0, "Nested"), "nid", *->nid) }
Expression entryToInitValue; // Expression that yields value for entry in target tree.
Expression expectedParamValue; // Expression that yield expectedType in target tree.
ParameterExpression entryParameterForMembers; // Parameter expression members think of as "entry".
ParameterExpression expectedParameterForMembers; // Parameter expression members think of as "expectedType" for entry.
string[] expressionNames = expressions.Skip(1).Select(e => ((MemberExpression)e).Member.Name).ToArray();
if (expressions.Length <= 1)
{
entryToInitValue = this.pathBuilder.ParameterEntryInScope;
expectedParamValue = this.pathBuilder.ExpectedParamTypeInScope;
entryParameterForMembers = (ParameterExpression)this.pathBuilder.ParameterEntryInScope;
expectedParameterForMembers = (ParameterExpression)this.pathBuilder.ExpectedParamTypeInScope;
}
else
{
entryToInitValue = this.GetDeepestEntry(expressions);
expectedParamValue = projectedTypeExpression;
entryParameterForMembers = Expression.Parameter(typeof(object), "subentry" + this.identifierId++);
expectedParameterForMembers = (ParameterExpression)this.pathBuilder.ExpectedParamTypeInScope;
// Annotate the entry expression with 'how we get to it' information.
// The annotation on entryToInitiValue is picked up
// The annotation on entryParameterForMembers is picked up to build nested member-init on entities.
ProjectionPath entryPath = new ProjectionPath(
(ParameterExpression)this.pathBuilder.LambdaParameterInScope,
this.pathBuilder.ExpectedParamTypeInScope,
this.pathBuilder.ParameterEntryInScope,
expressions.Skip(1));
this.annotations.Add(entryToInitValue, new ExpressionAnnotation() { Segment = entryPath[entryPath.Count - 1] });
this.annotations.Add(entryParameterForMembers, new ExpressionAnnotation() { Segment = entryPath[entryPath.Count - 1] });
this.pathBuilder.RegisterRewrite(this.pathBuilder.LambdaParameterInScope, expressionNames, entryParameterForMembers);
}
for (int i = 0; i < init.Bindings.Count; i++)
{
MemberAssignment assignment = (MemberAssignment)init.Bindings[i];
propertyNames.Add(assignment.Member.Name);
LambdaExpression propertyLambda;
// Here are the rewrites we do for member inits:
// new T { id = t.id }
// => ProjInit(pt, "id", f(t -> *.id));
//
// new T { t2 = new T2 { id2 = *.t2.id2 } }
// => ProjInit(pt, "t2", f(ProjInit(pt->t2), "id2", *.id2)))
if ((ClientType.CheckElementTypeIsEntity(assignment.Member.ReflectedType) &&
assignment.Expression.NodeType == ExpressionType.MemberInit))
{
Expression nestedEntry = CallMaterializer(
"ProjectionGetEntry",
entryParameterAtMemberInit,
Expression.Constant(assignment.Member.Name, typeof(string)));
ParameterExpression nestedEntryParameter = Expression.Parameter(
typeof(object),
"subentry" + this.identifierId++);
// Register the rewrite from the top to the entry if necessary.
ProjectionPath entryPath;
ExpressionAnnotation entryAnnotation;
if (this.annotations.TryGetValue(this.pathBuilder.ParameterEntryInScope, out entryAnnotation))
{
entryPath = new ProjectionPath(
(ParameterExpression)this.pathBuilder.LambdaParameterInScope,
this.pathBuilder.ExpectedParamTypeInScope,
entryParameterAtMemberInit);
entryPath.AddRange(entryAnnotation.Segment.StartPath);
}
else
{
entryPath = new ProjectionPath(
(ParameterExpression)this.pathBuilder.LambdaParameterInScope,
this.pathBuilder.ExpectedParamTypeInScope,
entryParameterAtMemberInit,
expressions.Skip(1));
}
ProjectionPathSegment nestedSegment = new ProjectionPathSegment(
entryPath,
assignment.Member.Name,
assignment.Member.ReflectedType);
entryPath.Add(nestedSegment);
string[] names = (entryPath.Where(m => m.Member != null).Select(m => m.Member)).ToArray();
this.annotations.Add(nestedEntryParameter, new ExpressionAnnotation() { Segment = nestedSegment });
this.pathBuilder.RegisterRewrite(this.pathBuilder.LambdaParameterInScope, names, nestedEntryParameter);
Expression e = this.Visit(assignment.Expression);
this.pathBuilder.RevokeRewrite(this.pathBuilder.LambdaParameterInScope, names);
this.annotations.Remove(nestedEntryParameter);
e = Expression.Convert(e, typeof(object));
ParameterExpression[] parameters =
new ParameterExpression[]
{
this.materializerExpression,
nestedEntryParameter,
expectedParameterForMembers,
};
propertyLambda = Expression.Lambda(e, parameters);
Expression[] nestedParams =
new Expression[]
{
this.materializerExpression,
nestedEntry,
expectedParameterForMembers,
};
var invokeParameters =
new ParameterExpression[]
{
this.materializerExpression,
(ParameterExpression)entryParameterAtMemberInit,
expectedParameterForMembers,
};
propertyLambda = Expression.Lambda(Expression.Invoke(propertyLambda, nestedParams), invokeParameters);
}
else
{
// We need an expression of object, which might require boxing.
Expression e = this.Visit(assignment.Expression);
e = Expression.Convert(e, typeof(object));
ParameterExpression[] parameters =
new ParameterExpression[]
{
this.materializerExpression,
entryParameterForMembers,
expectedParameterForMembers,
};
propertyLambda = Expression.Lambda(e, parameters);
}
#if TRACE_CLIENT_PROJECTIONS
Trace.WriteLine("Compiling lambda for " + assignment.Member.Name + ": " + propertyLambda);
#endif
propertyFunctions.Add((Func<object, object, Type, object>) propertyLambda.Compile());
}
// Revoke rewrites used for nested initialization.
for (int i = 1; i < expressions.Length; i++)
{
this.pathBuilder.RevokeRewrite(this.pathBuilder.LambdaParameterInScope, expressionNames);
this.annotations.Remove(entryToInitValue);
this.annotations.Remove(entryParameterForMembers);
}
Expression reboundExpression = CallMaterializer(
"ProjectionInitializeEntity",
this.materializerExpression,
entryToInitValue,
expectedParamValue,
projectedTypeExpression,
Expression.Constant(propertyNames.ToArray()),
Expression.Constant(propertyFunctions.ToArray()));
return Expression.Convert(reboundExpression, projectedType);
}
private Expression RebindParameter(Expression expression, ExpressionAnnotation annotation)
{
Expression expression2 = this.CallValueForPathWithType(annotation.Segment.StartPath.RootEntry, annotation.Segment.StartPath.ExpectedRootType, annotation.Segment.StartPath, expression.Type);
ProjectionPath startPath = new ProjectionPath(annotation.Segment.StartPath.Root, annotation.Segment.StartPath.ExpectedRootType, annotation.Segment.StartPath.RootEntry);
ProjectionPathSegment item = new ProjectionPathSegment(startPath, null, null);
startPath.Add(item);
ExpressionAnnotation annotation2 = new ExpressionAnnotation {
Segment = item
};
this.annotations[expression] = annotation2;
return expression2;
}
/// <summary>Rebinds the specified member access expression into a path-based value retrieval method call.</summary>
/// <param name='m'>Member expression.</param>
/// <param name='baseAnnotation'>Annotation for the base portion of the expression.</param>
/// <returns>A rebound expression.</returns>
private Expression RebindMemberAccess(MemberExpression m, ExpressionAnnotation baseAnnotation)
{
Debug.Assert(m != null, "m != null");
Debug.Assert(baseAnnotation != null, "baseAnnotation != null");
ProjectionPathSegment memberSegment;
// If we are in nested member-init, we rewrite the property
// accessors that are in the form of top.nested.id to
// nested.id.
Expression baseSourceExpression = m.Expression;
Expression result = this.pathBuilder.GetRewrite(baseSourceExpression);
if (result != null)
{
Expression baseTypeExpression = Expression.Constant(baseSourceExpression.Type, typeof(Type));
ProjectionPath nestedPath = new ProjectionPath(result as ParameterExpression, baseTypeExpression, result);
ProjectionPathSegment nestedSegment = new ProjectionPathSegment(nestedPath, m.Member.Name, m.Type);
nestedPath.Add(nestedSegment);
result = this.CallValueForPathWithType(result, baseTypeExpression, nestedPath, m.Type);
}
else
{
// This actually modifies the path for the underlying
// segments, but that shouldn't be a problem. Actually
// we should be able to remove it from the dictionary.
// There should be no aliasing problems, because
// annotations always come from target expression
// that are generated anew (except parameters,
// but those)
memberSegment = new ProjectionPathSegment(baseAnnotation.Segment.StartPath, m.Member.Name, m.Type);
baseAnnotation.Segment.StartPath.Add(memberSegment);
result = this.CallValueForPathWithType(
baseAnnotation.Segment.StartPath.RootEntry,
baseAnnotation.Segment.StartPath.ExpectedRootType,
baseAnnotation.Segment.StartPath,
m.Type);
}
return result;
}
internal override Expression VisitLambda(LambdaExpression lambda)
{
if (!this.topLevelProjectionFound || ((lambda.Parameters.Count == 1) && ClientTypeUtil.TypeOrElementTypeIsEntity(lambda.Parameters[0].Type)))
{
this.topLevelProjectionFound = true;
ParameterExpression expectedType = Expression.Parameter(typeof(Type), "type" + this.identifierId);
ParameterExpression entry = Expression.Parameter(typeof(object), "entry" + this.identifierId);
this.identifierId++;
this.pathBuilder.EnterLambdaScope(lambda, entry, expectedType);
ProjectionPath startPath = new ProjectionPath(lambda.Parameters[0], expectedType, entry);
ProjectionPathSegment item = new ProjectionPathSegment(startPath, null, null);
startPath.Add(item);
ExpressionAnnotation annotation = new ExpressionAnnotation {
Segment = item
};
this.annotations[lambda.Parameters[0]] = annotation;
Expression expression4 = this.Visit(lambda.Body);
if (expression4.Type.IsValueType)
{
expression4 = Expression.Convert(expression4, typeof(object));
}
Expression expression = Expression.Lambda<Func<object, object, Type, object>>(expression4, new ParameterExpression[] { this.materializerExpression, entry, expectedType });
this.pathBuilder.LeaveLambdaScope();
return expression;
}
return base.VisitLambda(lambda);
}
