/// <summary>
/// Initializes a new instance of the <see cref="UpdateEntryDto"/> class.
/// </summary>
/// <param name="entry">The state entry of an entity.</param>
/// <param name="mapper">The <see cref="IDynamicObjectMapper" /> used for mapping the property values.</param>
public UpdateEntryDto(IUpdateEntry entry, IDynamicObjectMapper mapper)
{
DynamicObject CreateValueDto(IProperty propertyBase, object value)
{
value = Utils.ConvertToProvider(value, propertyBase);
return(mapper.MapObject(value));
}
this.EntityTypeName = entry.EntityType.DisplayName();
this.EntityState = entry.EntityState;
this.PropertyDatas = entry.ToEntityEntry().Properties.Select(
prop => new PropertyData
{
Name = prop.Metadata.Name,
OriginalValueDto = prop.Metadata.GetOriginalValueIndex() >= 0 ? CreateValueDto(prop.Metadata, prop.OriginalValue) : null,
CurrentValueDto = CreateValueDto(prop.Metadata, prop.CurrentValue),
IsModified = prop.IsModified,
IsTemporary = prop.IsTemporary,
}).ToList();
if (entry.EntityType.HasDefiningNavigation())
{
var ownership = entry.EntityType.GetForeignKeys().Single(fk => fk.IsOwnership);
this.DelegatedIdentityDatas = ownership.Properties.Select(
prop => new PropertyData
{
Name = prop.Name,
OriginalValueDto = CreateValueDto(prop, entry.GetOriginalValue(prop)),
CurrentValueDto = CreateValueDto(prop, entry.GetCurrentValue(prop)),
IsModified = entry.IsModified(prop),
IsTemporary = entry.HasTemporaryValue(prop),
}).ToList();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="DefaultExpressionExecutor"/> class.
/// </summary>
public DefaultExpressionExecutor(Func <Type, IQueryable> queryableProvider, IExpressionFromRemoteLinqContext?context = null, Func <Type, bool>?setTypeInformation = null)
: base(queryableProvider, context)
{
_mapper = (context ?? ExpressionTranslatorContext.Default).ValueMapper
?? throw new ArgumentException($"{nameof(IExpressionValueMapperProvider.ValueMapper)} property must not be null.", nameof(context));
_setTypeInformation = setTypeInformation ?? (t => !t.IsAnonymousType());
}
/// <summary>
/// Initializes a new instance of the <see cref="ExpressionExecutor"/> class.
/// </summary>
public ExpressionExecutor(Func <Type, IQueryable> queryableProvider, ITypeResolver typeResolver = null, IDynamicObjectMapper mapper = null, Func <Type, bool> setTypeInformation = null, Func <System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally = null)
{
_queryableProvider = queryableProvider;
_typeResolver = typeResolver;
_mapper = mapper ?? new DynamicQueryResultMapper();
_setTypeInformation = setTypeInformation ?? (t => !t.IsAnonymousType());
_canBeEvaluatedLocally = canBeEvaluatedLocally;
}
public DefaultEntityFrameworkExpressionExecutor(
Func <Type, IQueryable> queryableProvider,
IExpressionTranslatorContext?context = null,
Func <Type, bool>?setTypeInformation = null)
: base(queryableProvider, context ??= new EntityFrameworkExpressionTranslatorContext())
{
_mapper = context.ValueMapper;
_setTypeInformation = setTypeInformation ?? (t => !t.IsAnonymousType());
}
/// <summary>
/// Returns the current values of scalar properties of the entity.
/// </summary>
/// <param name="entityType">The type of the entity.</param>
/// <param name="mapper">The <see cref="IDynamicObjectMapper" /> used for mapping the property values.</param>
/// <returns>
/// The current values of scalar properties of the entity mapped back to their original types.
/// </returns>
public object[] GetCurrentValues(IEntityType entityType, IDynamicObjectMapper mapper)
{
return(entityType
.GetProperties()
.Select(p => Utils.ConvertFromProvider(
mapper.Map(this.PropertyDatas.SingleOrDefault(pd => pd.Name == p.Name)?.CurrentValueDto),
p))
.ToArray());
}
public DefaultReactiveAsyncStreamExpressionExecutor(
Func <Type, IAsyncQueryable> queryableProvider,
IExpressionFromRemoteLinqContext?context = null,
Func <Type, bool>?setTypeInformation = null)
: base(queryableProvider, context ??= new AsyncQueryExpressionTranslatorContext())
{
_mapper = context.ValueMapper;
_setTypeInformation = setTypeInformation ?? (t => !t.IsAnonymousType());
}
/// <summary>
/// Matches the <see cref="PropertyEntry" />'s of the given <see cref="EntityEntry" /> with corresponding <see cref="PropertyData"/>'s.
/// </summary>
/// <param name="entry">The reference <see cref="EntityEntry" />.</param>
/// <param name="mapper">The <see cref="IDynamicObjectMapper" /> used for mapping the property values.</param>
/// <returns>
/// The list of matching scalar properties alongside their Origianl and Current values
/// mapped back to their original types.
/// </returns>
public IReadOnlyList <(PropertyEntry EfProperty, PropertyData DtoProperty, object OriginalValue, object CurrentValue)> JoinScalarProperties(
EntityEntry entry,
IDynamicObjectMapper mapper)
{
return((
from ef in entry.Properties
join dto in this.PropertyDatas
on ef.Metadata.Name equals dto.Name
select(ef, dto,
Utils.ConvertFromProvider(mapper.Map(dto.OriginalValueDto), ef.Metadata),
Utils.ConvertFromProvider(mapper.Map(dto.CurrentValueDto), ef.Metadata))).ToList());
}
/// <summary>
/// Initializes a new instance of the <see cref="DynamicObject"/> class,
/// representing the object structure defined by the specified object.
/// </summary>
/// <param name="obj">The object to be represented by the new dynamic object.</param>
/// <param name="mapper">Optional instance of dynamic object mapper.</param>
/// <exception cref="ArgumentNullException">The specified object is null.</exception>
public DynamicObject(object obj, IDynamicObjectMapper mapper = null)
{
if (obj is null)
{
throw new ArgumentNullException(nameof(obj));
}
var dynamicObject = (mapper ?? new DynamicObjectMapper()).MapObject(obj);
Type = dynamicObject.Type;
Properties = dynamicObject.Properties;
}
public RemoteToSystemLinqTranslator(IExpressionFromRemoteLinqContext expressionTranslatorContext)
{
expressionTranslatorContext.AssertNotNull(nameof(expressionTranslatorContext));
_parameterExpressionCache = new Dictionary <RemoteLinq.ParameterExpression, SystemLinq.ParameterExpression>(ExpressionComparer.Default);
_labelTargetCache = new Dictionary <RemoteLinq.LabelTarget, SystemLinq.LabelTarget>(ExpressionComparer.Default);
_typeResolver = expressionTranslatorContext.TypeResolver
?? throw new ArgumentException($"{nameof(expressionTranslatorContext.TypeResolver)} property must not be null.", nameof(expressionTranslatorContext));
_dynamicObjectMapper = expressionTranslatorContext.ValueMapper
?? throw new ArgumentException($"{nameof(expressionTranslatorContext.ValueMapper)} property must not be null.", nameof(expressionTranslatorContext));
}
public SystemToRemoteLinqTranslator(IExpressionToRemoteLinqContext expressionTranslatorContext)
{
expressionTranslatorContext.AssertNotNull(nameof(expressionTranslatorContext));
_canBeEvaluatedLocally = expressionTranslatorContext.CanBeEvaluatedLocally;
_needsMapping = expressionTranslatorContext.NeedsMapping;
_typeInfoProvider = expressionTranslatorContext.TypeInfoProvider
?? throw new ArgumentException($"{nameof(expressionTranslatorContext.TypeInfoProvider)} property must not be null.", nameof(expressionTranslatorContext));
_dynamicObjectMapper = expressionTranslatorContext.ValueMapper
?? throw new ArgumentException($"{nameof(expressionTranslatorContext.ValueMapper)} property must not be null.", nameof(expressionTranslatorContext));
}
internal static T MapToType <T>(IEnumerable <DynamicObject> dataRecords, IDynamicObjectMapper mapper, Expression expression)
{
var elementType = TypeHelper.GetElementType(typeof(T));
if (mapper is null)
{
mapper = new DynamicQueryResultMapper();
}
var result = mapper.Map(dataRecords, elementType);
if (result is null)
{
return(default);
internal static T MapToType <T>(IEnumerable <DynamicObject> dataRecords, IDynamicObjectMapper mapper, Expression expression)
{
var elementType = TypeHelper.GetElementType(typeof(T));
var strElementType = elementType.Name;
if (mapper is null)
{
mapper = new DynamicQueryResultMapper();
}
var result = mapper.Map(dataRecords, elementType);
if (result is null)
{
return(default(T));
}
if (typeof(T).IsAssignableFrom(typeof(IEnumerable <>).MakeGenericType(elementType)))
{
return((T)result);
}
if (typeof(T).IsAssignableFrom(elementType))
{
try
{
object single;
if ((expression as MethodCallExpression)?.Arguments.Count == 2)
{
var predicate = GetTruePredicate(elementType);
single = MethodInfos.Enumerable.SingleWithFilter.MakeGenericMethod(elementType).Invoke(null, new object[] { result, predicate });
}
else
{
single = MethodInfos.Enumerable.Single.MakeGenericMethod(elementType).Invoke(null, new object[] { result });
}
return((T)single);
}
catch (TargetInvocationException ex)
{
throw ex.InnerException;
}
}
throw new Exception(string.Format("Failed to cast result of type '{0}' to '{1}'", result.GetType(), typeof(T)));
}
/// <summary>
/// Maps a collection of <see cref="DynamicObject" />s into a collection of objects.
/// </summary>
/// <param name="objectMapper">The <see cref="IDynamicObjectMapper"/> instance used to map the <see cref="DynamicObject"/>s.</param>
/// <param name="objects">Collection of <see cref="DynamicObject" /> to be mapped.</param>
/// <param name="type">Target type for mapping, set this parameter to <see langword="null"/> if type information included within individual <see cref="DynamicObject" />s should be used.</param>
/// <returns>Collection of objects created based on the <see cref="DynamicObject" />s specified.</returns>
public static IEnumerable Map(this IDynamicObjectMapper objectMapper, IEnumerable <DynamicObject?> objects, Type?type = null)
{
if (objectMapper is null)
{
throw new ArgumentNullException(nameof(objectMapper));
}
if (objects is null)
{
throw new ArgumentNullException(nameof(objects));
}
IEnumerable <object?> source = objects.Select(x => objectMapper.Map(x, type));
return(type is null || type == typeof(object)
? source.ToArray()
: source.CastCollectionToArrayOfType(type));
}
public RemoteRepository(string uri)
{
_mapper = new DynamicObjectMapper(isKnownTypeProvider: new IsKnownTypeProvider());
var binding = new NetNamedPipeBinding {
MaxReceivedMessageSize = 10240
}.WithDebugSetting();
_channelFactory = new ChannelFactory <IQueryService>(binding, uri);
_dataProvider = expression =>
{
using var proxy = _channelFactory.CreateServiceProxy();
IEnumerable <DynamicObject> result = proxy.Service.ExecuteQuery(expression);
return(result);
};
}
public RemoteRepository(string uri)
{
_mapper = new DynamicObjectMapper(isKnownTypeProvider: new IsKnownTypeProvider());
var binding = new NetNamedPipeBinding()
{
CloseTimeout = TimeSpan.FromMinutes(10),
ReceiveTimeout = TimeSpan.FromMinutes(10),
SendTimeout = TimeSpan.FromMinutes(10),
MaxReceivedMessageSize = 640000L
};
_channelFactory = new ChannelFactory <IQueryService>(binding, uri);
_dataProvider = expression =>
{
IQueryService channel = null;
try
{
channel = _channelFactory.CreateChannel();
var result = channel.ExecuteQuery(expression);
return(result);
}
finally
{
var communicationObject = channel as ICommunicationObject;
if (communicationObject != null)
{
if (communicationObject.State == CommunicationState.Faulted)
{
communicationObject.Abort();
}
else
{
communicationObject.Close();
}
}
}
};
}
public static IEnumerable <DynamicObject> ConvertResultToDynamicObjects(object queryResult, IDynamicObjectMapper mapper = null, Func <Type, bool> setTypeInformation = null)
{
var exec = (IExpressionExecutionDecorator) new ExpressionExecutor(null, null, mapper, setTypeInformation);
return(exec.ProcessResult(exec.ConvertResult(queryResult)));
}
public static ExpressionExecutionContext Executor(this Expression expression, Func <Type, IQueryable> queryableProvider, ITypeResolver typeResolver = null, IDynamicObjectMapper mapper = null, Func <Type, bool> setTypeInformation = null, Func <System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally = null) => new ExpressionExecutionContext(CreateExecutor(queryableProvider, typeResolver, mapper, setTypeInformation, canBeEvaluatedLocally), expression);
public static IEnumerable <DynamicObject> Execute(this Expression expression, Func <Type, IQueryable> queryableProvider, ITypeResolver typeResolver, Func <object, object> resultProjector, IDynamicObjectMapper mapper = null, Func <Type, bool> setTypeInformation = null, Func <System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally = null) => Executor(expression, queryableProvider, typeResolver, mapper, setTypeInformation, canBeEvaluatedLocally).With(resultProjector).Execute();
public DefaultEntityFrameworkExpressionExecutor(Func <Type, IQueryable> queryableProvider, ITypeResolver?typeResolver = null, IDynamicObjectMapper?mapper = null, Func <Type, bool>?setTypeInformation = null, Func <System.Linq.Expressions.Expression, bool>?canBeEvaluatedLocally = null)
: base(queryableProvider, typeResolver, canBeEvaluatedLocally)
{
_mapper = mapper ?? new DynamicQueryResultMapper();
_setTypeInformation = setTypeInformation ?? (t => !t.IsAnonymousType());
}
private static ExpressionExecutor CreateExecutor(Func <Type, IQueryable> queryableProvider, ITypeResolver typeResolver, IDynamicObjectMapper mapper, Func <Type, bool> setTypeInformation, Func <System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally) => new ExpressionExecutor(queryableProvider, typeResolver, mapper, setTypeInformation);
public EntityFrameworkExpressionExecutor(Func<Type, IQueryable> queryableProvider, ITypeResolver typeResolver = null, IDynamicObjectMapper mapper = null, Func<Type, bool> setTypeInformation = null, Func<System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally = null)
: base(queryableProvider, typeResolver, mapper, setTypeInformation, canBeEvaluatedLocally)
{
}
public DynamicResultMapper(IDynamicObjectMapper mapper)
{
_mapper = mapper;
}
/// <summary> /// Composes and executes the query based on the <see cref="Expression"/> and mappes the result into dynamic objects. /// </summary> /// <param name="expression">The <see cref="Expression"/> to be executed.</param> /// <param name="queryableProvider">Delegate to provide <see cref="IQueryable"/> instances for given <see cref="Type"/>s.</param> /// <param name="typeResolver">Optional instance of <see cref="ITypeResolver"/> to be used to translate <see cref="Aqua.TypeSystem.TypeInfo"/> into <see cref="Type"/> objects.</param> /// <param name="mapper">Optional instance of <see cref="IDynamicObjectMapper"/>.</param> /// <param name="setTypeInformation">Function to define whether to add type information.</param> /// <param name="canBeEvaluatedLocally">Function to define which expressions may be evaluated locally, and which need to be retained for execution in the database.</param> /// <returns>The mapped result of the query execution.</returns> public static IEnumerable <DynamicObject> ExecuteWithEntityFrameworkCore(this Expression expression, Func <Type, IQueryable> queryableProvider, ITypeResolver typeResolver = null, IDynamicObjectMapper mapper = null, Func <Type, bool> setTypeInformation = null, Func <System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally = null) => new EntityFrameworkCoreExpressionExecutor(queryableProvider, typeResolver, mapper, setTypeInformation, canBeEvaluatedLocally).Execute(expression);
public static IQueryable <T> CreateEntityFrameworkCoreAsyncQueryable <T>(this RemoteQueryableFactory factory, Func <Expressions.Expression, Task <IEnumerable <DynamicObject> > > dataProvider, ITypeInfoProvider typeInfoProvider = null, IDynamicObjectMapper mapper = null, Func <System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally = null) => factory.CreateQueryable <T>(dataProvider, typeInfoProvider, mapper, canBeEvaluatedLocally.And(ExpressionEvaluator.CanBeEvaluated));
/// <summary> /// Creates an <see cref="ExpressionExecutionContext" /> for the given <see cref="Expression"/> /// </summary> /// <param name="expression">The <see cref="Expression"/> to be executed</param> /// <param name="queryableProvider">Delegate to provide <see cref="IQueryable"/> instances for given <see cref="Type"/>s</param> /// <param name="typeResolver">Optional instance of <see cref="ITypeResolver"/> to be used to translate <see cref="Aqua.TypeSystem.TypeInfo"/> into <see cref="Type"/> objects</param> /// <param name="mapper">Optional instance of <see cref="IDynamicObjectMapper"/></param> /// <param name="setTypeInformation">Function to define whether to add type information</param> /// <returns>A new instance <see cref="ExpressionExecutionContext" /></returns> public static ExpressionExecutionContext EntityFrameworkExecutor(this Expression expression, Func <Type, IQueryable> queryableProvider, ITypeResolver typeResolver = null, IDynamicObjectMapper mapper = null, Func <Type, bool> setTypeInformation = null) => new ExpressionExecutionContext(new EntityFrameworkExpressionExecutor(queryableProvider, typeResolver, mapper, setTypeInformation), expression);
/// <summary>
/// Creates an instance of <see cref="IQueryable{T}" /> that utilizes the data provider specified.
/// </summary>
/// <typeparam name="T">Element type of the <see cref="IQueryable{T}"/>.</typeparam>
public static IQueryable <T> CreateQueryable <T>(this RemoteQueryableFactory factory, Func <Expressions.Expression, IEnumerable <DynamicObject> > dataProvider, ITypeInfoProvider typeInfoProvider = null, IDynamicObjectMapper mapper = null, Func <System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally = null)
{
var resultMapper = new DynamicResultMapper(mapper);
return(factory.CreateQueryable <T, IEnumerable <DynamicObject> >(dataProvider, resultMapper, typeInfoProvider, canBeEvaluatedLocally));
}
/// <summary>
/// Returns the values of the delegated identity key of the entity
/// (for owned entities only).
/// </summary>
/// <param name="mapper">The <see cref="IDynamicObjectMapper" /> used for mapping the key values.</param>
/// <param name="key"> The primary key of the defining entity. </param>
/// <returns>
/// The values of the delegated identity key of the entity mapped back to their original types.
/// </returns>
public object[] GetDelegatedIdentityKeys(IDynamicObjectMapper mapper, IKey key)
{
return(this.DelegatedIdentityDatas.Zip(
key.Properties,
(d, p) => Utils.ConvertFromProvider(mapper.Map(d.CurrentValueDto), p)).ToArray());
}
public DynamicObjectWithOriginalReference(object obj, IDynamicObjectMapper mapper = null)
: base(obj, mapper)
{
_originalObject = obj;
}
/// <summary> /// Composes and executes the query based on the <see cref="Expression"/> and mappes the result into dynamic objects /// </summary> /// <param name="expression">The <see cref="Expression"/> to be executed</param> /// <param name="queryableProvider">Delegate to provide <see cref="IQueryable"/> instances for given <see cref="Type"/>s</param> /// <param name="typeResolver">Optional instance of <see cref="ITypeResolver"/> to be used to translate <see cref="Aqua.TypeSystem.TypeInfo"/> into <see cref="Type"/> objects</param> /// <param name="mapper">Optional instance of <see cref="IDynamicObjectMapper"/></param> /// <param name="setTypeInformation">Function to define whether to add type information</param> /// <returns>The mapped result of the query execution</returns> public static IEnumerable <DynamicObject> ExecuteWithEntityFramework(this Expression expression, Func <Type, IQueryable> queryableProvider, ITypeResolver typeResolver = null, IDynamicObjectMapper mapper = null, Func <Type, bool> setTypeInformation = null) => new EntityFrameworkExpressionExecutor(queryableProvider, typeResolver, mapper, setTypeInformation).Execute(expression);
/// <summary>
/// Creates an instance of <see cref="IQueryable" /> that utilizes the data provider specified.
/// </summary>
public static IQueryable CreateAsyncQueryable(this RemoteQueryableFactory factory, Type elementType, Func <Expressions.Expression, Task <IEnumerable <DynamicObject> > > dataProvider, ITypeInfoProvider typeInfoProvider = null, IDynamicObjectMapper mapper = null, Func <System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally = null)
{
var resultMapper = new AsyncDynamicResultMapper(mapper);
return(factory.CreateAsyncQueryable <IEnumerable <DynamicObject> >(elementType, dataProvider, resultMapper, typeInfoProvider, canBeEvaluatedLocally));
}
/// <summary>
/// Creates an <see cref="ExpressionExecutionContext" /> for the given <see cref="Expression"/>.
/// </summary>
/// <param name="expression">The <see cref="Expression"/> to be executed.</param>
/// <param name="dbContext">Instance of <see cref="DbContext"/> to get the <see cref="DbSet{T}"/>.</param>
/// <param name="typeResolver">Optional instance of <see cref="ITypeResolver"/> to be used to translate <see cref="Aqua.TypeSystem.TypeInfo"/> into <see cref="Type"/> objects.</param>
/// <param name="mapper">Optional instance of <see cref="IDynamicObjectMapper"/>.</param>
/// <param name="setTypeInformation">Function to define whether to add type information.</param>
/// <param name="canBeEvaluatedLocally">Function to define which expressions may be evaluated locally, and which need to be retained for execution in the database.</param>
/// <returns>A new instance <see cref="ExpressionExecutionContext" />.</returns>
public static ExpressionExecutionContext EntityFrameworkCoreExecutor(this Expression expression, DbContext dbContext, ITypeResolver typeResolver = null, IDynamicObjectMapper mapper = null, Func <Type, bool> setTypeInformation = null, Func <System.Linq.Expressions.Expression, bool> canBeEvaluatedLocally = null)
=> new ExpressionExecutionContext(new EntityFrameworkCoreExpressionExecutor(dbContext, typeResolver, mapper, setTypeInformation, canBeEvaluatedLocally), expression);
