/// <summary>
/// Analyzes the specified <paramref name="lambda"/> for selection and updates
/// <paramref name="resource"/>.
/// </summary>
/// <param name="lambda">Lambda expression to analyze.</param>
/// <param name="resource">Resource expression to update.</param>
/// <param name="context">Context of expression to analyze.</param>
private static void AnalyzeResourceExpression(LambdaExpression lambda, ResourceExpression resource, DataServiceContext context)
{
SelectExpandPathBuilder pb = new SelectExpandPathBuilder();
ProjectionAnalyzer.Analyze(lambda, pb, context);
resource.Projection = new ProjectionQueryOptionExpression(lambda.Body.Type, lambda, pb.ProjectionPaths.ToList());
resource.ExpandPaths = pb.ExpandPaths.Union(resource.ExpandPaths, StringComparer.Ordinal).ToList();
resource.RaiseUriVersion(pb.UriVersion);
}
/// <summary>Initializes a new <see cref="EntityProjectionAnalyzer"/> instance.</summary>
/// <param name="pb">Path-tracking object.</param>
/// <param name="type">Type being member-init'ed.</param>
/// <param name="context">Context of expression to analyze.</param>
private EntityProjectionAnalyzer(SelectExpandPathBuilder pb, Type type, DataServiceContext context)
{
Debug.Assert(pb != null, "pb != null");
Debug.Assert(type != null, "type != null");
this.builder = pb;
this.type = type;
this.context = context;
}
public void SingleProjectionBecomesSelect()
{
PropertyInfo testProperty1Info = typeof(TestEntity).GetProperties().Single(x => x.Name == "TestProperty1");
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
pathBuilder.PushParamExpression(pe);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(testProperty1Info, null, this.dsc);
pathBuilder.ProjectionPaths.Single().Should().Be("TestProperty1");
}
public void SingleExpansionBecomesExpand()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter((typeof(TestEntity)));
pathBuilder.PushParamExpression(pe);
PropertyInfo navPropPropertyInfo = typeof(TestEntity).GetProperties().Single(x => x.PropertyType == typeof(SubTestEntity1));
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(navPropPropertyInfo, null, dsc);
pathBuilder.ExpandPaths.Single().Should().Be("NavProp1");
}
public void SingleProjectionBecomesSelect()
{
PropertyInfo testProperty1Info = typeof(TestEntity).GetProperties().Single(x => x.Name == "TestProperty1");
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
pathBuilder.PushParamExpression(pe);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(testProperty1Info, null, this.dsc);
pathBuilder.ProjectionPaths.Single().Should().Be("TestProperty1");
}
public void TypeIsPrePendedAsATypeSegment()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
PropertyInfo testProperty1Info = typeof(TestEntity).GetProperties().Single(x => x.Name == "TestProperty1");
pathBuilder.PushParamExpression(pe);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(testProperty1Info, typeof(TestEntity), dsc);
pathBuilder.ProjectionPaths.Single().Should().Be("Microsoft.OData.Client.Tests.ALinq.SelectExpandPathBuilderTests+TestEntity/TestProperty1");
}
public void SingleExpansionBecomesExpand()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter((typeof(TestEntity)));
pathBuilder.PushParamExpression(pe);
PropertyInfo navPropPropertyInfo = typeof(TestEntity).GetProperties().Single(x => x.PropertyType == typeof(SubTestEntity1));
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(navPropPropertyInfo, null, dsc);
pathBuilder.ExpandPaths.Single().Should().Be("NavProp1");
}
public void ExpansionThroughMultipleNavPropsIsExpressedAsExpandOptions()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
PropertyInfo navPropInfo = typeof(TestEntity).GetProperties().Single(x => x.Name == "NavProp1");
PropertyInfo subNavPropInfo = typeof(SubTestEntity1).GetProperties().Single(x => x.Name == "NavProp3");
pathBuilder.PushParamExpression(pe);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(navPropInfo, null, dsc);
pathBuilder.AppendPropertyToPath(subNavPropInfo, null, dsc);
pathBuilder.ExpandPaths.Single().Should().Be("NavProp1($expand=NavProp3)");
}
public void ProjectionThroughMultipleNavPropsBecomeExpandOptions()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
PropertyInfo subTestEntityProperty = typeof(SubTestEntity1).GetProperties().Single(x => x.Name == "SubTestProperty");
PropertyInfo navPropInfo = typeof(TestEntity).GetProperties().Single(x => x.Name == "NavProp1");
pathBuilder.PushParamExpression(pe);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(navPropInfo, null, dsc);
pathBuilder.AppendPropertyToPath(subTestEntityProperty, null, dsc);
Assert.Equal("NavProp1($select=SubTestProperty)", pathBuilder.ExpandPaths.Single());
}
public void MultipleSingleLevelExpansionsBecomeExpandClauses()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
pathBuilder.PushParamExpression(pe);
foreach (PropertyInfo propertyInfo in typeof(TestEntity).GetProperties().Where(x => x.PropertyType != typeof(string)))
{
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(propertyInfo, null, dsc);
}
pathBuilder.ExpandPaths.Should().HaveCount(2);
pathBuilder.ExpandPaths.Should().Contain(x => x == "NavProp1")
.And.Contain(x => x == "NavProp2");
}
public void MultipleSingleLevelExpansionsBecomeExpandClauses()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
pathBuilder.PushParamExpression(pe);
foreach (PropertyInfo propertyInfo in typeof(TestEntity).GetProperties().Where(x => x.PropertyType != typeof(string)))
{
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(propertyInfo, null, dsc);
}
pathBuilder.ExpandPaths.Should().HaveCount(2);
pathBuilder.ExpandPaths.Should().Contain(x => x == "NavProp1")
.And.Contain(x => x == "NavProp2");
}
public void SelectingLowerLevelPropertyIsTranslatedIntoExpandOption()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
PropertyInfo navPropInfo = typeof(TestEntity).GetProperties().Single(x => x.Name == "NavProp1");
PropertyInfo subNavPropInfo = typeof(SubTestEntity1).GetProperties().Single(x => x.Name == "NavProp3");
PropertyInfo subTestProperty = typeof(SubTestEntity2).GetProperties().Single();
pathBuilder.PushParamExpression(pe);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(navPropInfo, null, dsc);
pathBuilder.AppendPropertyToPath(subNavPropInfo, null, dsc);
pathBuilder.AppendPropertyToPath(subTestProperty, null, dsc);
pathBuilder.ExpandPaths.Single().Should().Be("NavProp1($expand=NavProp3($select=SubTestProperty))");
}
public void MultipleSingleLevelProjectionsBecomeSelectClauses()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
pathBuilder.PushParamExpression(pe);
foreach (PropertyInfo propertyInfo in typeof(TestEntity).GetProperties().Where(x => x.PropertyType == typeof(string)))
{
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(propertyInfo, null, this.dsc);
}
Assert.Equal(2, pathBuilder.ProjectionPaths.Count());
Assert.Contains("TestProperty1", pathBuilder.ProjectionPaths);
Assert.Contains("TestProperty2", pathBuilder.ProjectionPaths);
}
/// <summary>
/// Analyzes the specified expression with an entity-projection or
/// non-entity-projection analyzer.
/// </summary>
/// <param name="mie">Expression to analyze.</param>
/// <param name="pb">Path box where select and expand paths are tracked.</param>
/// <param name="context">Context of expression to analyze.</param>
private static void Analyze(MemberInitExpression mie, SelectExpandPathBuilder pb, DataServiceContext context)
{
Debug.Assert(mie != null, "mie != null");
Debug.Assert(pb != null, "pb != null");
bool knownEntityType = ClientTypeUtil.TypeOrElementTypeIsEntity(mie.Type);
if (knownEntityType)
{
EntityProjectionAnalyzer.Analyze(mie, pb, context);
}
else
{
NonEntityProjectionAnalyzer.Analyze(mie, pb, context);
}
}
public void PushingANewParameterExpressionResetsTheBasePath()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe1 = Expression.Parameter(typeof(TestEntity), "pe1");
ParameterExpression pe2 = Expression.Parameter(typeof(SubTestEntity1), "pe2");
PropertyInfo navPropInfo = typeof(TestEntity).GetProperties().Single(x => x.Name == "NavProp1");
PropertyInfo subNavPropInfo = typeof(SubTestEntity1).GetProperties().Single(x => x.Name == "NavProp3");
PropertyInfo subTestProperty = typeof(SubTestEntity2).GetProperties().Single();
pathBuilder.PushParamExpression(pe1);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(navPropInfo, null, dsc);
pathBuilder.AppendPropertyToPath(subNavPropInfo, null, dsc);
pathBuilder.PushParamExpression(pe2);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(subTestProperty, null, dsc);
pathBuilder.ExpandPaths.Single().Should().Be("NavProp1($expand=NavProp3($select=SubTestProperty))");
}
private static void Analyze(LambdaExpression e, SelectExpandPathBuilder pb, DataServiceContext context)
{
bool knownEntityType = ClientTypeUtil.TypeOrElementTypeIsEntity(e.Body.Type);
ParameterExpression pe = e.Parameters.Last();
bool isEntityParameter = ClientTypeUtil.TypeOrElementTypeIsEntity(pe.Type);
if (isEntityParameter)
{
pb.PushParamExpression(pe);
}
if (!knownEntityType)
{
NonEntityProjectionAnalyzer.Analyze(e.Body, pb, context);
}
else
{
switch (e.Body.NodeType)
{
case ExpressionType.MemberInit:
EntityProjectionAnalyzer.Analyze((MemberInitExpression)e.Body, pb, context);
break;
case ExpressionType.New:
throw new NotSupportedException(Strings.ALinq_CannotConstructKnownEntityTypes);
case ExpressionType.Constant:
throw new NotSupportedException(Strings.ALinq_CannotCreateConstantEntity);
default:
// ExpressionType.MemberAccess as a top-level expression is correctly
// processed here, as the lambda isn't being member-initialized.
NonEntityProjectionAnalyzer.Analyze(e.Body, pb, context);
break;
}
}
if (isEntityParameter)
{
pb.PopParamExpression();
}
}
internal static void Analyze(Expression e, SelectExpandPathBuilder pb, DataServiceContext context)
{
var nepa = new NonEntityProjectionAnalyzer(pb, e.Type, context);
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);
}
}
public void ProjectionThroughMultipleNavPropsBecomeExpandOptions()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
PropertyInfo subTestEntityProperty = typeof(SubTestEntity1).GetProperties().Single(x => x.Name == "SubTestProperty");
PropertyInfo navPropInfo = typeof(TestEntity).GetProperties().Single(x => x.Name == "NavProp1");
pathBuilder.PushParamExpression(pe);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(navPropInfo, null, dsc);
pathBuilder.AppendPropertyToPath(subTestEntityProperty, null, dsc);
pathBuilder.ExpandPaths.Single().Should().Be("NavProp1($select=SubTestProperty)");
}
public void TypeIsPrePendedAsATypeSegment()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
PropertyInfo testProperty1Info = typeof(TestEntity).GetProperties().Single(x => x.Name == "TestProperty1");
pathBuilder.PushParamExpression(pe);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(testProperty1Info, typeof(TestEntity), dsc);
pathBuilder.ProjectionPaths.Single().Should().Be("Microsoft.OData.Client.Tests.ALinq.SelectExpandPathBuilderTests+TestEntity/TestProperty1");
}
public void PushingANewParameterExpressionResetsTheBasePath()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe1 = Expression.Parameter(typeof(TestEntity), "pe1");
ParameterExpression pe2 = Expression.Parameter(typeof(SubTestEntity1), "pe2");
PropertyInfo navPropInfo = typeof(TestEntity).GetProperties().Single(x => x.Name == "NavProp1");
PropertyInfo subNavPropInfo = typeof(SubTestEntity1).GetProperties().Single(x => x.Name == "NavProp3");
PropertyInfo subTestProperty = typeof(SubTestEntity2).GetProperties().Single();
pathBuilder.PushParamExpression(pe1);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(navPropInfo, null, dsc);
pathBuilder.AppendPropertyToPath(subNavPropInfo, null, dsc);
pathBuilder.PushParamExpression(pe2);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(subTestProperty, null, dsc);
pathBuilder.ExpandPaths.Single().Should().Be("NavProp1($expand=NavProp3($select=SubTestProperty))");
}
public void SelectingLowerLevelPropertyIsTranslatedIntoExpandOption()
{
SelectExpandPathBuilder pathBuilder = new SelectExpandPathBuilder();
ParameterExpression pe = Expression.Parameter(typeof(TestEntity));
PropertyInfo navPropInfo = typeof(TestEntity).GetProperties().Single(x => x.Name == "NavProp1");
PropertyInfo subNavPropInfo = typeof(SubTestEntity1).GetProperties().Single(x => x.Name == "NavProp3");
PropertyInfo subTestProperty = typeof(SubTestEntity2).GetProperties().Single();
pathBuilder.PushParamExpression(pe);
pathBuilder.StartNewPath();
pathBuilder.AppendPropertyToPath(navPropInfo, null, dsc);
pathBuilder.AppendPropertyToPath(subNavPropInfo, null, dsc);
pathBuilder.AppendPropertyToPath(subTestProperty, null, dsc);
pathBuilder.ExpandPaths.Single().Should().Be("NavProp1($expand=NavProp3($select=SubTestProperty))");
}
private NonEntityProjectionAnalyzer(SelectExpandPathBuilder pb, Type type, DataServiceContext context)
{
this.builder = pb;
this.type = type;
this.context = context;
}
/// <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>
/// <param name="context">Context of expression to analyze.</param>
internal static void Analyze(MemberInitExpression mie, SelectExpandPathBuilder pb, DataServiceContext context)
{
Debug.Assert(mie != null, "mie != null");
var epa = new EntityProjectionAnalyzer(pb, mie.Type, context);
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 = ClientTypeUtil.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");
#if DEBUG
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 correlated");
#endif
analysis.CheckCompatibleAssignments(mie.Type, ref targetEntityPath);
// For DataServiceStreamLink, the last expression will be a constant expression. Hence we won't be comparing name checks and entity checks for those type of bindings
if (lastExpression != null)
{
if (lastExpression.Member.Name != ma.Member.Name)
{
throw new NotSupportedException(Strings.ALinq_PropertyNamesMustMatchInProjections(lastExpression.Member.Name, ma.Member.Name));
}
// Unless we're initializing an entity, we should not traverse into the parameter in scope.
bool targetIsEntity = ClientTypeUtil.TypeOrElementTypeIsEntity(targetType);
bool sourceIsEntity = ClientTypeUtil.TypeOrElementTypeIsEntity(lastExpression.Type);
if (sourceIsEntity && !targetIsEntity)
{
throw new NotSupportedException(Strings.ALinq_ExpressionNotSupportedInProjection(targetType, ma.Expression));
}
}
}
}
}
