// private static methods
private static Boolean CanBeEvaluatedLocally(Expression expression, IQueryProvider queryProvider)
{
// any operation on a query can't be done locally
var constantExpression = expression as ConstantExpression;
if (constantExpression != null)
{
var query = constantExpression.Value as IQueryable;
if (query != null && (queryProvider == null || query.Provider == queryProvider))
{
return false;
}
}
var methodCallExpression = expression as MethodCallExpression;
if (methodCallExpression != null)
{
Type declaringType = methodCallExpression.Method.DeclaringType;
if (declaringType == typeof (Enumerable) || declaringType == typeof (Queryable))
{
return false;
}
}
if (expression.NodeType == ExpressionType.Convert && expression.Type == typeof (Object))
{
return true;
}
if (expression.NodeType == ExpressionType.Parameter || expression.NodeType == ExpressionType.Lambda)
{
return false;
}
return true;
}
public void SetUp()
{
_mockRepository = new MockRepository();
_providerMock = _mockRepository.StrictMock<IQueryProvider> ();
_intArrayExpression = ExpressionHelper.CreateNewIntArrayExpression ();
}
internal static bool IsEntityFramework(IQueryProvider provider) {
var type = provider.GetType().FullName;
return type == "System.Data.Entity.Internal.Linq.DbQueryProvider"
|| type == "Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider"
|| type == "Microsoft.Data.Entity.Query.Internal.EntityQueryProvider";
}
public ContentQueryTranslator( IQueryProvider provider, ITableFinder tableFinder )
{
this.provider = provider;
this.tableFinder = tableFinder;
Skip = -1;
Take = -1;
}
public ExpressionBuilderParameters(ParameterExpression[] parameters, IQueryProvider queryProvider, Type elementType, IXmlNamespaceResolver namespaceResolver, bool mayRootPathBeImplied, IOperatorImplementationProvider operatorImplementationProvider, Func<Type, IXmlNamespaceResolver, XPathTypeNavigator> navigatorCreator=null)
{
Debug.Assert(parameters!=null);
if (parameters==null)
throw new ArgumentNullException("parameters");
Debug.Assert(parameters.Length>0);
if (parameters.Length==0)
throw new ArgumentException(
string.Format(
CultureInfo.CurrentCulture,
SR.ArrayShouldHaveElementsException,
1,
parameters.Length
),
"parameters"
);
Debug.Assert(queryProvider!=null);
if (queryProvider==null)
throw new ArgumentNullException("queryProvider");
Debug.Assert(elementType!=null);
if (elementType==null)
throw new ArgumentNullException("elementType");
Parameters=new ReadOnlyCollection<ParameterExpression>(parameters);
ElementType=elementType;
QueryProvider=queryProvider;
NamespaceResolver=namespaceResolver;
MayRootPathBeImplied=mayRootPathBeImplied;
OperatorImplementationProvider=operatorImplementationProvider;
NavigatorCreator=navigatorCreator;
}
public DefaultEnumeratorProvider(Type entityType, IQueryProvider provider, Expression expression)
{
Checker.CheckArgumentNull(entityType, "entityType");
Checker.CheckArgumentNull(provider, "provider");
Checker.CheckArgumentNull(expression, "expression");
EntityType = entityType;
QueryProvider = provider;
Expression = expression;
}
internal TableQuery(IDatabase database, Expression expression)
{
if (database == null)
{
throw new ArgumentNullException("database");
}
if (expression == null)
{
throw new ArgumentNullException("expression");
}
this.database = database;
this.expression = expression;
this.provider = new TableQueryProvider(database);
}
public TestDbAsyncQueryProvider(IQueryProvider provider)
{
_inner = provider;
}
public SelectAddressStoredProcedure(IQueryProvider provider, PerSchemaSqlDbContext dbContext) : base(provider, dbContext)
{
}
internal ProjectionReader(IDataReader reader, Func <ProjectionRow, T> projector, IQueryProvider provider)
{
_enumerator = new Enumerator(reader, projector, provider);
}
public Task<Boolean> RequestPermission()
{
var tcs = new TaskCompletionSource<Boolean>();
if(UIDevice.CurrentDevice.CheckSystemVersion( 6, 0 ))
{
var status = ABAddressBook.GetAuthorizationStatus();
if(status == ABAuthorizationStatus.Denied || status == ABAuthorizationStatus.Restricted)
{
tcs.SetResult( false );
}
else
{
if(addressBook == null)
{
addressBook = new ABAddressBook();
provider = new ContactQueryProvider( addressBook );
}
if(status == ABAuthorizationStatus.NotDetermined)
{
addressBook.RequestAccess(
( s, e ) =>
{
tcs.SetResult( s );
if(!s)
{
addressBook.Dispose();
addressBook = null;
provider = null;
}
} );
}
else
{
tcs.SetResult( true );
}
}
}
else
{
tcs.SetResult( true );
}
return tcs.Task;
}
public QueryBinder(IQueryProvider provider, Expression root)
{
_projector = new FieldProjector(CanBeField);
_provider = provider;
_root = root;
}
/// <summary>Constructor.</summary>
/// <param name="originalProvider">The original provider.</param>
public QueryIncludeOptimizedProvider(IQueryProvider originalProvider)
{
OriginalProvider = originalProvider;
}
public ManagedConnectionQuery(IQueryable innerQueryable, IQueryProvider queryProvider)
{
_innerQueryable = innerQueryable;
_queryProvider = queryProvider;
}
/** <inheritdoc /> */
public CacheQueryableBase(IQueryProvider provider) : base(provider)
{
// No-op.
}
public Query(IQueryProvider provider)
{
Provider = provider ?? throw new ArgumentNullException(nameof(provider));
}
public QueryProvider(IQueryProvider provider) => _provider = provider;
public AsyncAdaptedQueryProvider(IQueryProvider queryProvider)
{
_queryProvider = queryProvider;
}
internal static RemoveReactionPayload Create(IQueryProvider provider, Expression expression)
{
return(new RemoveReactionPayload(provider, expression));
}
public RemoveReactionPayload(IQueryProvider provider, Expression expression) : base(provider, expression)
{
}
public IEnumeratorProvider CreateEnumeratorProvider(Type entityType, IQueryProvider provider, Expression expression)
{
return new LinqEnumeratorProvider(entityType, provider, expression);
}
public AsyncDecompiledQueryable(IQueryProvider provider, IQueryable inner) : base(provider, inner)
{
this.inner = inner;
}
/** <inheritdoc /> */
public CacheQueryableBase(IQueryProvider provider, Expression expression) : base(provider, expression)
{
// No-op.
}
internal CqlUpdate(Expression expression, IQueryProvider table)
: base(expression, table)
{
}
public TestAsyncQueryProvider(IQueryProvider provider)
{
_provider = provider;
}
public ExpandableQueryProvider(IQueryProvider provider)
{
_provider = provider ?? throw new ArgumentNullException(nameof(provider));
}
/// <summary>Constructor.</summary>
/// <param name="originalProvider">The original provider.</param>
public QueryIncludeFilterProvider(IQueryProvider originalProvider)
{
OriginalProvider = originalProvider;
}
/// <summary>
/// Performs evaluation and replacement of independent sub-trees.
/// </summary>
/// <param name="expression">The root of the expression tree.</param>
/// <param name="queryProvider">The query provider.</param>
/// <returns>A new tree with sub-trees evaluated and replaced.</returns>
internal static Expression Evaluate(Expression expression, IQueryProvider queryProvider)
{
return new SubtreeEvaluator(
Nominator.Nominate(e => CanBeEvaluatedLocally(e, queryProvider), expression))
.Evaluate(expression);
}
public PullRequestReviewConnection(IQueryProvider provider, Expression expression) : base(provider, expression)
{
}
internal static StubIClosable Create(IQueryProvider provider, Expression expression)
{
return(new StubIClosable(provider, expression));
}
internal static PullRequestReviewConnection Create(IQueryProvider provider, Expression expression)
{
return(new PullRequestReviewConnection(provider, expression));
}
internal Enumerator(IDataReader reader, Func <ProjectionRow, T> projector, IQueryProvider provider)
{
_reader = reader;
_projector = projector;
_provider = provider;
}
private InterceptingProvider(Func <Expression, Expression> afterUnderlyingVisitor, IQueryProvider underlyingQueryProvider, params Func <Expression, Expression>[] visitors)
{
this._underlyingProvider = underlyingQueryProvider;
this._afterUnderlyingVisitor = afterUnderlyingVisitor;
this._visitors = visitors;
}
/// <summary>
/// Ctor
/// </summary>
/// <param name="provider"></param>
public Query(IQueryProvider provider)
: this(provider, null)
{
}
/// <summary>
/// Replaces the provider of the expression with the given one.
/// </summary>
/// <typeparam name="TEntity">The type of the entity.</typeparam>
/// <param name="query">The query.</param>
/// <param name="set">The set.</param>
/// <param name="provider">The provider of the set.</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">
/// query
/// or
/// set
/// or
/// provider
/// </exception>
/// <exception cref="ArgumentException">The supplied query does not originate from a QueryRootExpression and therefor does not come from Entity Framework. - query</exception>
public static Expression ReplaceProvider <TEntity>(Expression query, DbSet <TEntity> set, IQueryProvider provider)
where TEntity : class
{
if (query is null)
{
throw new ArgumentNullException(nameof(query));
}
if (set is null)
{
throw new ArgumentNullException(nameof(set));
}
if (provider is null)
{
throw new ArgumentNullException(nameof(provider));
}
var setQuery = provider is IAsyncQueryProvider asyncProvider ?
new QueryRootExpression(asyncProvider, set.EntityType) :
new QueryRootExpression(set.EntityType);
var visitor = new QueryRootExpressionReplaceVisitor(setQuery);
var replaced = visitor.Visit(query);
if (!visitor.queryWasReplaced)
{
throw new ArgumentException($"The supplied query does not originate from a {nameof(QueryRootExpression)} and therefor does not come from Entity Framework.", nameof(query));
}
return(replaced ?? throw new ArgumentException($"The supplied query resulted in a replaces expression which was null. This should not happen.", nameof(query)));
}
public FakeDbAsyncQueryProvider(IQueryProvider inner)
{
_inner = inner;
}
internal static bool IsLinqToObjectsProvider(IQueryProvider provider)
{
return(provider.GetType().FullName.Contains("EnumerableQuery"));
}
/// <summary>
/// Gets the next-page token from the $skiptoken query option in the request URI.
/// </summary>
/// <param name="query">Query for which the continuation token is being provided.</param>
/// <param name="resourceType">Resource type of the result on which the $skip token is to be applied.</param>
/// <param name="continuationToken">Continuation token parsed into primitive type values.</param>
public virtual void SetContinuationToken(IQueryable query, ResourceType resourceType, object[] continuationToken)
{
if (IsTopRequest())
return;
var instanceType = resourceType.InstanceType;
var queryType = typeof(ODataQuery<>).MakeGenericType(instanceType);
this.expression = query.Expression;
this.queryProvider = query.Provider;
if (queryType.IsAssignableFrom(query.GetType()))
{
if (this.SupportsType(instanceType))
{
if (continuationToken != null && continuationToken[0] != null)
{
var token = Encoding.Default.GetString(Convert.FromBase64String(continuationToken[0].ToString()));
var tokenParts = token.Split(':');
this.entityTypeName = tokenParts[0];
this.lastReceivedPage = Convert.ToInt32(tokenParts[1]);
}
else
{
this.entityTypeName = instanceType.Name;
this.lastReceivedPage = 1;
}
var provider = queryType.GetProperty("Provider").GetValue(query, null);
var skip = (this.lastReceivedPage * this.PageSizeFor(instanceType)) - this.PageSizeFor(instanceType);
var nextContinuationToken = string.Format(CultureInfo.InvariantCulture, "{0}:{1}", skip + this.CurrentOffset(), this.PageSizeFor(instanceType));
provider.GetType().GetProperty("ContinuationToken").SetValue(provider, nextContinuationToken, null);
provider.GetType().GetProperty("SkipTakeBasedPaging").SetValue(provider, true, null);
}
}
}
protected internal DecompiledQueryable(IQueryProvider provider, IQueryable inner)
{
this.inner = inner;
this.provider = provider;
}
public void Setup()
{
_provider = MockRepository.GenerateStub<IQueryProvider>();
}
/// <summary>
/// Creates source for initial expression, i.e. From
/// </summary>
/// <param name="provider"></param>
internal QueryableWorkItemStore(WorkItemQueryProvider provider)
{
this.provider = provider;
this.expression = Expression.Constant(this);
}
// internal static methods
internal static Expression Bind(IQueryProvider provider, Expression node)
{
return new QueryBinder(node).Visit(node);
}
public RetryQueryable(IQueryProvider queryProvider, IQueryable queryable, IRetryPolicy retryPolicy)
{
_queryable = queryable;
_queryProvider = queryProvider;
_retryPolicy = retryPolicy;
}
internal TableQuery(IDatabase database)
{
if (database == null)
{
throw new ArgumentNullException("database");
}
this.database = database;
this.expression = Expression.Constant(this);
this.provider = new TableQueryProvider(database);
}
internal RealmResults(Realm realm, RealmObjectBase.Metadata metadata, RealmResultsProvider realmResultsProvider, Expression expression) : base(realm, metadata)
{
Provider = realmResultsProvider;
Expression = expression ?? Expression.Constant(this);
}
/// <summary>
/// Performs evaluation and replacement of independent sub-trees.
/// </summary>
/// <param name="expression">The root of the expression tree.</param>
/// <param name="queryProvider">The query provider when the expression is a LINQ query (can be null).</param>
/// <returns>A new tree with sub-trees evaluated and replaced.</returns>
public static Expression Evaluate(Expression expression, IQueryProvider queryProvider)
{
return new SubtreeEvaluator(new Nominator(e => CanBeEvaluatedLocally(e, queryProvider)).Nominate(expression)).Evaluate(expression);
}
public IDataReader ExecuteDataReader(IQueryProvider query, CommandBehavior behavior)
{
return InternalDatabaseProvider.ExecuteDataReader(query, behavior);
}
/// <summary>
/// Creates sources for consequitive expressions .Where, .OrderBy, etc.
/// </summary>
/// <param name="provider"></param>
/// <param name="expression"></param>
internal QueryableWorkItemStore(WorkItemQueryProvider provider, Expression expression)
{
this.provider = provider;
this.expression = expression;
}
// This constructor is called indirectly by LINQ's query methods, just pass to base.
public NhQueryable(IQueryProvider provider, Expression expression)
: base(provider, expression)
{
}
public AdsiDirectory(IQueryProvider queryProvider)
: base(queryProvider)
{
}
internal MyAsyncQueryProvider(IQueryProvider inner)
{
_inner = inner;
}
public IDataReader ExecuteDataReader(IQueryProvider query)
{
return InternalDatabaseProvider.ExecuteDataReader(query);
}
internal TestDbAsyncQueryProvider(IQueryProvider inner)
{
_inner = inner;
}
public int ExecuteNonQuery(IQueryProvider query)
{
return InternalDatabaseProvider.ExecuteNonQuery(query);
}
internal TestAsyncQueryProvider(IQueryProvider inner) => _inner = inner;
internal CqlCommand(Expression expression, IQueryProvider table)
{
_expression = expression;
_table = table;
}
public NhFetchRequest(IQueryProvider provider, Expression expression)
: base(provider, expression)
{
}
public StubIClosable(IQueryProvider provider, Expression expression) : base(provider, expression)
{
}
private void CheckStatus()
{
if(UIDevice.CurrentDevice.CheckSystemVersion( 6, 0 ))
{
var status = ABAddressBook.GetAuthorizationStatus();
if(status != ABAuthorizationStatus.Authorized)
{
throw new SecurityException( "AddressBook has not been granted permission" );
}
}
if(addressBook == null)
{
addressBook = new ABAddressBook();
provider = new ContactQueryProvider( addressBook );
}
}
