private QueryModel ApplyAllNodes(IExpressionNode node, ClauseGenerationContext clauseGenerationContext)
{
QueryModel queryModel = null;
if (node.Source != null)
queryModel = ApplyAllNodes(node.Source, clauseGenerationContext);
return node.Apply(queryModel, clauseGenerationContext);
}
protected override void ApplyNodeSpecificSemantics (QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
var clause = new WhereClause (GetResolvedPredicate (clauseGenerationContext));
queryModel.BodyClauses.Add (clause);
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel,
ClauseGenerationContext clauseGenerationContext)
{
queryModel.BodyClauses.Add(new WhereMissingClause(GetResolvedPredicate(clauseGenerationContext)));
return queryModel;
}
public override Expression Resolve(ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull("expressionToBeResolved", expressionToBeResolved);
ArgumentUtility.CheckNotNull("clauseGenerationContext", clauseGenerationContext);
return Source.Resolve(inputParameter, expressionToBeResolved, clauseGenerationContext);
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel,
ClauseGenerationContext clauseGenerationContext)
{
queryModel.BodyClauses.Add(new UseKeysClause(Keys));
return queryModel;
}
public override Expression Resolve(
ParameterExpression inputParameter,
Expression expressionToBeResolved,
ClauseGenerationContext clauseGenerationContext)
=> Source.Resolve(
inputParameter,
expressionToBeResolved,
clauseGenerationContext);
public override Expression Resolve (ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull ("expressionToBeResolved", expressionToBeResolved);
// no data streams out from this node, so we cannot resolve any expressions
throw CreateResolveNotSupportedException ();
}
public override Expression Resolve (ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull ("expressionToBeResolved", expressionToBeResolved);
// UnionResultOperator is a query source, so expressions reolve their input parameter with the UnionResultOperator created by this node.
return QuerySourceExpressionNodeUtility.ReplaceParameterWithReference (this, inputParameter, expressionToBeResolved, clauseGenerationContext);
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
var resultOperator = CreateResultOperator (clauseGenerationContext);
queryModel.ResultOperators.Add (resultOperator);
return queryModel;
}
public Expression GetResolvedOptionalElementSelector (ClauseGenerationContext clauseGenerationContext)
{
if (_optionalElementSelector == null)
return null;
return _cachedElementSelector.GetOrCreate (
r => r.GetResolvedExpression (_optionalElementSelector.Body, _optionalElementSelector.Parameters[0], clauseGenerationContext));
}
protected override void ApplyNodeSpecificSemantics (QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
//NOTE: Do not seal ApplyNodeSpecificSemantics() in ResultOperatorExpressionNodeBase. It is overridden by e.g. Fetch-operators.
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
var resultOperator = CreateResultOperator (clauseGenerationContext);
queryModel.ResultOperators.Add (resultOperator);
}
protected sealed override QueryModel WrapQueryModelAfterEndOfQuery (QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
// Result operators can safely be appended to the previous query model even after another result operator, so do not wrap the previous
// query model.
return queryModel;
}
protected override void ApplyNodeSpecificSemantics (QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
var clause = new OrderByClause();
clause.Orderings.Add (new Ordering (GetResolvedKeySelector (clauseGenerationContext), OrderingDirection.Desc));
queryModel.BodyClauses.Add (clause);
}
public override Expression Resolve (ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull ("expressionToBeResolved", expressionToBeResolved);
// this simply streams its input data to the output without modifying its structure, so we resolve by passing on the data to the previous node
return Source.Resolve (inputParameter, expressionToBeResolved, clauseGenerationContext);
}
public QueryModel Apply (QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
if (queryModel != null)
throw new ArgumentException ("QueryModel has to be null because MainSourceExpressionNode marks the start of a query.", "queryModel");
var mainFromClause = CreateMainFromClause (clauseGenerationContext);
var defaultSelectClause = new SelectClause (new QuerySourceReferenceExpression (mainFromClause));
return new QueryModel (mainFromClause, defaultSelectClause) { ResultTypeOverride = QuerySourceType };
}
public QueryModel Apply (QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
queryModel = WrapQueryModelAfterEndOfQuery (queryModel, clauseGenerationContext);
ApplyNodeSpecificSemantics (queryModel, clauseGenerationContext);
SetResultTypeOverride (queryModel);
return queryModel;
}
public override Expression Resolve (
ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
return QuerySourceExpressionNodeUtility.ReplaceParameterWithReference (
this,
inputParameter,
expressionToBeResolved,
clauseGenerationContext);
}
public override Expression Resolve (ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull ("expressionToBeResolved", expressionToBeResolved);
var convertExpression = Expression.Convert (inputParameter, SearchedItemType);
var expressionWithCast = ReplacingExpressionVisitor.Replace (inputParameter, convertExpression, expressionToBeResolved);
return Source.Resolve (inputParameter, expressionWithCast, clauseGenerationContext);
}
protected override void ApplyNodeSpecificSemantics (QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("queryModel", queryModel);
var orderByClause = GetOrderByClause (queryModel);
if (orderByClause == null)
throw new NotSupportedException ("ThenByDescending expressions must follow OrderBy, OrderByDescending, ThenBy, or ThenByDescending expressions.");
orderByClause.Orderings.Add (new Ordering (GetResolvedKeySelector (clauseGenerationContext), OrderingDirection.Desc));
}
public override Expression Resolve(
ParameterExpression inputParameter,
Expression expressionToBeResolved,
ClauseGenerationContext clauseGenerationContext)
{
Check.NotNull(inputParameter, nameof(inputParameter));
Check.NotNull(expressionToBeResolved, nameof(expressionToBeResolved));
return Source.Resolve(inputParameter, expressionToBeResolved, clauseGenerationContext);
}
protected override void ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
var queryAnnotationResultOperator
= (QueryAnnotationResultOperator)clauseGenerationContext.GetContextInfo(Source);
((IncludeQueryAnnotation)queryAnnotationResultOperator.Annotation)
.AppendToNavigationPath(_navigationPropertyPathLambda.GetComplexPropertyAccess());
clauseGenerationContext.AddContextInfo(this, queryAnnotationResultOperator);
}
private MainFromClause CreateMainFromClause (ClauseGenerationContext clauseGenerationContext)
{
var fromClause = new MainFromClause (
AssociatedIdentifier,
QuerySourceElementType,
ParsedExpression);
clauseGenerationContext.AddContextInfo (this, fromClause);
return fromClause;
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
var includeResultOperator
= (IncludeResultOperator)clauseGenerationContext.GetContextInfo(Source);
includeResultOperator.AppendToNavigationPath(_navigationPropertyPathLambda.GetComplexPropertyAccess());
clauseGenerationContext.AddContextInfo(this, includeResultOperator);
return queryModel;
}
public Expression GetResolvedExpression (
Expression unresolvedExpression, ParameterExpression parameterToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("unresolvedExpression", unresolvedExpression);
ArgumentUtility.CheckNotNull ("parameterToBeResolved", parameterToBeResolved);
var sourceNode = _currentNode.Source;
var resolvedExpression = sourceNode.Resolve (parameterToBeResolved, unresolvedExpression, clauseGenerationContext);
resolvedExpression = TransparentIdentifierRemovingExpressionVisitor.ReplaceTransparentIdentifiers (resolvedExpression);
return resolvedExpression;
}
public override Expression Resolve (ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull ("expressionToBeResolved", expressionToBeResolved);
ArgumentUtility.CheckNotNull ("clauseGenerationContext", clauseGenerationContext);
// we modify the structure of the stream of data coming into this node by our result selector,
// so we first resolve the result selector, then we substitute the result for the inputParameter in the expressionToBeResolved
var resolvedResultSelector = GetResolvedResultSelector (clauseGenerationContext);
return ReplacingExpressionTreeVisitor.Replace (inputParameter, resolvedResultSelector, expressionToBeResolved);
}
protected override QueryModel ApplyNodeSpecificSemantics (QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
var previousFetchRequest = clauseGenerationContext.GetContextInfo (Source) as FetchRequestBase;
if (previousFetchRequest == null)
throw new ParserException ("ThenFetchMany must directly follow another Fetch request.");
FetchRequestBase innerFetchRequest = new FetchManyRequest (RelationMember);
innerFetchRequest = previousFetchRequest.GetOrAddInnerFetchRequest (innerFetchRequest);
clauseGenerationContext.AddContextInfo (this, innerFetchRequest);
return queryModel;
}
public Expression Resolve (ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull ("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull ("expressionToBeResolved", expressionToBeResolved);
// query sources resolve into references that point back to the respective clauses
return QuerySourceExpressionNodeUtility.ReplaceParameterWithReference (
this,
inputParameter,
expressionToBeResolved,
clauseGenerationContext);
}
public Expression GetResolvedResultSelector (ClauseGenerationContext clauseGenerationContext)
{
return _cachedResultSelector.GetOrCreate (
r => r.GetResolvedExpression (
QuerySourceExpressionNodeUtility.ReplaceParameterWithReference (
this,
_resultSelector.Parameters[1],
_resultSelector.Body,
clauseGenerationContext),
_resultSelector.Parameters[0],
clauseGenerationContext));
}
protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext)
{
var navigationPropertyPath
= Source.Resolve(
_navigationPropertyPathLambda.Parameters[0],
_navigationPropertyPathLambda.Body,
clauseGenerationContext);
var includeResultOperator = new IncludeResultOperator(navigationPropertyPath);
clauseGenerationContext.AddContextInfo(this, includeResultOperator);
return includeResultOperator;
}
/// <summary>
/// Gets the <see cref="IQuerySource"/> corresponding to the given <paramref name="node"/>, throwing an <see cref="InvalidOperationException"/>
/// if no such clause has been registered in the given <paramref name="context"/>.
/// </summary>
/// <param name="node">The node for which the <see cref="IQuerySource"/> should be returned.</param>
/// <param name="context">The clause generation context.</param>
/// <returns>The <see cref="IQuerySource"/> corresponding to <paramref name="node"/>.</returns>
public static IQuerySource GetQuerySourceForNode (IQuerySourceExpressionNode node, ClauseGenerationContext context)
{
try
{
return (IQuerySource) context.GetContextInfo (node);
}
catch (KeyNotFoundException ex)
{
var message = string.Format (
"Cannot retrieve an IQuerySource for the given {0}. Be sure to call Apply before calling methods that require IQuerySources, and pass in "
+ "the same QuerySourceClauseMapping to both.",
node.GetType().Name);
throw new InvalidOperationException (message, ex);
}
}
public override Expression Resolve(
ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
// this simply streams its input data to the output without modifying its structure, so we resolve by passing on the data to the previous node
return(Source.Resolve(inputParameter, expressionToBeResolved, clauseGenerationContext));
}
protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext)
{
return(new AggregateFromSeedResultOperator(Seed, GetResolvedFunc(clauseGenerationContext), OptionalResultSelector));
}
protected override void ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("queryModel", queryModel);
queryModel.SelectClause.Selector = GetResolvedSelector(clauseGenerationContext);
}
protected abstract QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext);
public Expression GetResolvedPredicate(ClauseGenerationContext clauseGenerationContext)
{
return(_cachedPredicate.GetOrCreate(r => r.GetResolvedExpression(Predicate.Body, Predicate.Parameters[0], clauseGenerationContext)));
}
public LambdaExpression GetResolvedFunc(ClauseGenerationContext clauseGenerationContext)
{
// '(total, current) => total + current' becomes 'total => total + [current]'
return(_cachedFunc.GetOrCreate(
r => Expression.Lambda(r.GetResolvedExpression(Func.Body, Func.Parameters[1], clauseGenerationContext), Func.Parameters[0])));
}
public override Expression Resolve(ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
throw CreateResolveNotSupportedException();
}
public override Expression Resolve(ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull("expressionToBeResolved", expressionToBeResolved);
// this simply streams its input data to the output without modifying its structure, so we resolve by passing on the data to the previous node
return(Source.Resolve(inputParameter, expressionToBeResolved, clauseGenerationContext));
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("queryModel", queryModel);
var resolvedCollectionSelector = GetResolvedCollectionSelector(clauseGenerationContext);
var clause = new AdditionalFromClause(ResultSelector.Parameters[1].Name, ResultSelector.Parameters[1].Type, resolvedCollectionSelector);
queryModel.BodyClauses.Add(clause);
clauseGenerationContext.AddContextInfo(this, clause);
var selectClause = queryModel.SelectClause;
selectClause.Selector = GetResolvedResultSelector(clauseGenerationContext);
return(queryModel);
}
protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext)
{
return(new IntersectResultOperator(Source2));
}
protected abstract ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext);
protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext)
{
return(new OfTypeResultOperator(SearchedItemType));
}
/// <summary>
/// Wraps the <paramref name="queryModel"/> into a subquery after a node that indicates the end of the query (
/// <see cref="ResultOperatorExpressionNodeBase"/> or <see cref="GroupByExpressionNode"/>). Override this method
/// when implementing a <see cref="IExpressionNode"/> that does not need a subquery to be created if it occurs after the query end.
/// </summary>
/// <remarks>
/// <para>
/// When an ordinary node follows a result operator or group node, it cannot simply append its clauses to the <paramref name="queryModel"/>
/// because semantically, the result operator (or grouping) must be executed _before_ the clause. Therefore, in such scenarios, we wrap
/// the current query model into a <see cref="SubQueryExpression"/> that we put into the <see cref="MainFromClause"/> of a new
/// <see cref="QueryModel"/>.
/// </para>
/// <para>
/// This method also changes the <see cref="Source"/> of this node because logically, all <see cref="Resolve"/> operations must be handled
/// by the new <see cref="MainFromClause"/> holding the <see cref="SubQueryExpression"/>. For example, consider the following call chain:
/// <code>
/// MainSource (...)
/// .Select (x => x)
/// .Distinct ()
/// .Select (x => x)
/// </code>
///
/// Naively, the last Select node would resolve (via Distinct and Select) to the <see cref="MainFromClause"/> created by the initial MainSource.
/// After this method is executed, however, that <see cref="MainFromClause"/> is part of the sub query, and a new <see cref="MainFromClause"/>
/// has been created to hold it. Therefore, we replace the chain as follows:
/// <code>
/// MainSource (MainSource (...).Select (x => x).Distinct ())
/// .Select (x => x)
/// </code>
///
/// Now, the last Select node resolves to the new <see cref="MainFromClause"/>.
/// </para>
/// </remarks>
protected virtual QueryModel WrapQueryModelAfterEndOfQuery(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("queryModel", queryModel);
var sourceAsResultOperatorNode = Source as ResultOperatorExpressionNodeBase;
if (sourceAsResultOperatorNode != null)
{
return(WrapQueryModel(queryModel, sourceAsResultOperatorNode.AssociatedIdentifier, clauseGenerationContext));
}
else
{
return(queryModel);
}
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
var clause = new WhereClause(GetResolvedPredicate(clauseGenerationContext));
queryModel.BodyClauses.Add(clause);
return(queryModel);
}
private QueryModel WrapQueryModel(QueryModel queryModel, string associatedIdentifier, ClauseGenerationContext clauseGenerationContext)
{
var subQueryExpression = new SubQueryExpression(queryModel);
// change the Source of this node so that Resolve will later correctly go to the new main from clause we create for the sub query
var newMainSourceNode = new MainSourceExpressionNode(associatedIdentifier, subQueryExpression);
Source = newMainSourceNode;
return(newMainSourceNode.Apply(null, clauseGenerationContext));
}
protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext)
{
return(new ContainsResultOperator(Item));
}
protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext)
{
return(new MaxResultOperator());
}
public abstract Expression Resolve(
ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext);
protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext)
{
var castItemType = CastItemType;
return(new CastResultOperator(castItemType));
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("queryModel", queryModel);
var clause = new WhereClause(GetResolvedPredicate(clauseGenerationContext));
queryModel.BodyClauses.Add(clause);
return(queryModel);
}
public override Expression Resolve(ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("inputParameter", inputParameter);
ArgumentUtility.CheckNotNull("expressionToBeResolved", expressionToBeResolved);
var convertExpression = Expression.Convert(inputParameter, SearchedItemType);
var expressionWithCast = ReplacingExpressionTreeVisitor.Replace(inputParameter, convertExpression, expressionToBeResolved);
return(Source.Resolve(inputParameter, expressionWithCast, clauseGenerationContext));
}
protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext)
{
return(new ExceptResultOperator(_source2));
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("queryModel", queryModel);
var clause = new OrderByClause();
clause.Orderings.Add(new Ordering(GetResolvedKeySelector(clauseGenerationContext), OrderingDirection.Asc));
queryModel.BodyClauses.Add(clause);
return(queryModel);
}
protected override ResultOperatorBase CreateResultOperator(ClauseGenerationContext clauseGenerationContext)
{
return(new LastResultOperator(ParsedExpression.Method.Name.EndsWith("OrDefault")));
}
public Expression GetResolvedKeySelector(ClauseGenerationContext clauseGenerationContext)
{
return(_cachedSelector.GetOrCreate(r => r.GetResolvedExpression(KeySelector.Body, KeySelector.Parameters[0], clauseGenerationContext)));
}
protected override QueryModel ApplyNodeSpecificSemantics(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("queryModel", queryModel);
var orderByClause = GetOrderByClause(queryModel);
if (orderByClause == null)
{
throw new ParserException("ThenByDescending expressions must follow OrderBy, OrderByDescending, ThenBy, or ThenByDescending expressions.");
}
orderByClause.Orderings.Add(new Ordering(GetResolvedKeySelector(clauseGenerationContext), OrderingDirection.Asc));
return(queryModel);
}
protected sealed override QueryModel WrapQueryModelAfterEndOfQuery(QueryModel queryModel, ClauseGenerationContext clauseGenerationContext)
{
ArgumentUtility.CheckNotNull("queryModel", queryModel);
// Result operators can safely be appended to the previous query model even after another result operator, so do not wrap the previous
// query model.
return(queryModel);
}
public override Expression Resolve(
ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
// no data streams out from this node, so we cannot resolve any expressions
throw CreateResolveNotSupportedException();
}
public Expression Resolve(ParameterExpression inputParameter, Expression expressionToBeResolved, ClauseGenerationContext clauseGenerationContext)
{
// query sources resolve into references that point back to the respective clauses
return(QuerySourceExpressionNodeUtility.ReplaceParameterWithReference(
this,
inputParameter,
expressionToBeResolved,
clauseGenerationContext));
}
