/// <summary>
/// Parses a <paramref name="filter"/> clause, binding
/// the text into semantic nodes using the provided model.
/// </summary>
/// <param name="filter">String representation of the filter expression.</param>
/// <param name="configuration">The configuration used for binding.</param>
/// <param name="odataPathInfo">The path info from Uri path.</param>
/// <returns>A <see cref="FilterClause"/> representing the metadata bound filter expression.</returns>
private FilterClause ParseFilterImplementation(string filter, ODataUriParserConfiguration configuration, ODataPathInfo odataPathInfo)
{
ExceptionUtils.CheckArgumentNotNull(configuration, "configuration");
ExceptionUtils.CheckArgumentNotNull(odataPathInfo, "odataPathInfo");
ExceptionUtils.CheckArgumentNotNull(filter, "filter");
// Get the syntactic representation of the filter expression
UriQueryExpressionParser expressionParser = new UriQueryExpressionParser(configuration.Settings.FilterLimit, configuration.EnableCaseInsensitiveUriFunctionIdentifier);
QueryToken filterToken = expressionParser.ParseFilter(filter);
// Bind it to metadata
BindingState state = new BindingState(configuration, odataPathInfo.Segments.ToList());
state.ImplicitRangeVariable = NodeFactory.CreateImplicitRangeVariable(odataPathInfo.TargetEdmType.ToTypeReference(), odataPathInfo.TargetNavigationSource);
state.RangeVariables.Push(state.ImplicitRangeVariable);
if (applyClause != null)
{
state.AggregatedPropertyNames = applyClause.GetLastAggregatedPropertyNames();
}
MetadataBinder binder = new MetadataBinder(state);
FilterBinder filterBinder = new FilterBinder(binder.Bind, state);
FilterClause boundNode = filterBinder.BindFilter(filterToken);
return(boundNode);
}
/// <summary>
/// Binds an Count segment token.
/// </summary>
/// <param name="countSegmentToken">The Count segment token to bind.</param>
/// <param name="state">State of the metadata binding.</param>
/// <returns>The bound Count segment token.</returns>
internal QueryNode BindCountSegment(CountSegmentToken countSegmentToken)
{
ExceptionUtils.CheckArgumentNotNull(countSegmentToken, "countSegmentToken");
QueryNode source = this.bindMethod(countSegmentToken.NextToken);
CollectionNode node = source as CollectionNode;
if (node == null)
{
throw new ODataException(ODataErrorStrings.MetadataBinder_CountSegmentNextTokenNotCollectionValue());
}
FilterClause filterClause = null;
SearchClause searchClause = null;
BindingState innerBindingState = new BindingState(state.Configuration);
innerBindingState.ImplicitRangeVariable = NodeFactory.CreateParameterNode(ExpressionConstants.It, node);
MetadataBinder binder = new MetadataBinder(innerBindingState);
if (countSegmentToken.FilterOption != null)
{
FilterBinder filterBinder = new FilterBinder(binder.Bind, innerBindingState);
filterClause = filterBinder.BindFilter(countSegmentToken.FilterOption);
}
if (countSegmentToken.SearchOption != null)
{
SearchBinder searchBinder = new SearchBinder(binder.Bind);
searchClause = searchBinder.BindSearch(countSegmentToken.SearchOption);
}
return(new CountNode(node, filterClause, searchClause));
}
/// <summary>
/// Binds the token to a SingleValueFunctionCallNode or a SingleResourceFunctionCallNode for complex
/// </summary>
/// <param name="functionCallToken">Token to bind</param>
/// <returns>The resulting SingleValueFunctionCallNode/SingleResourceFunctionCallNode</returns>
internal QueryNode BindFunctionCall(FunctionCallToken functionCallToken)
{
ExceptionUtils.CheckArgumentNotNull(functionCallToken, "functionCallToken");
ExceptionUtils.CheckArgumentNotNull(functionCallToken.Name, "functionCallToken.Name");
// Bind the parent, if present.
// TODO: parent can be a collection as well, so we need to loosen this to QueryNode.
QueryNode parent = null;
if (state.ImplicitRangeVariable != null)
{
if (functionCallToken.Source != null)
{
parent = this.bindMethod(functionCallToken.Source);
}
else
{
parent = NodeFactory.CreateRangeVariableReferenceNode(state.ImplicitRangeVariable);
}
}
// Collection with any or all expression is already supported and handled separately.
// Add support of collection with $count segment.
var colNode = parent as CollectionNavigationNode;
if (colNode != null && functionCallToken.Name == UriQueryConstants.CountSegment)
{
FilterClause filterOption = null;
var filter = functionCallToken.Arguments.FirstOrDefault(a => a.ParameterName == "$filter");
if (filter != null)
{
MetadataBinder binder = this.BuildNewMetadataBinder(colNode.NavigationSource);
FilterBinder filterBinder = new FilterBinder(binder.Bind, binder.BindingState);
filterOption = filterBinder.BindFilter(filter.ValueToken);
}
// create a collection count node for collection node property.
return(new CountNode(colNode, filterOption));
}
// First see if there is a custom function for this
QueryNode boundFunction;
if (this.TryBindIdentifier(functionCallToken.Name, functionCallToken.Arguments, parent, state, out boundFunction))
{
return(boundFunction);
}
// then check if there is a global custom function(i.e with out a parent node)
if (this.TryBindIdentifier(functionCallToken.Name, functionCallToken.Arguments, null, state, out boundFunction))
{
return(boundFunction);
}
// If there isn't, bind as Uri function
// Bind all arguments
List <QueryNode> argumentNodes = new List <QueryNode>(functionCallToken.Arguments.Select(ar => this.bindMethod(ar)));
return(BindAsUriFunction(functionCallToken, argumentNodes));
}
/// <summary>
/// Bind the filter clause <see cref="FilterClause"/> at this level.
/// </summary>
/// <param name="filterToken">The filter token to visit.</param>
/// <returns>The null or the built filter clause.</returns>
private FilterClause BindFilter(QueryToken filterToken, IEdmNavigationSource navigationSource,
IEdmTypeReference elementType, HashSet <EndPathToken> generatedProperties, bool collapsed = false)
{
if (filterToken != null)
{
MetadataBinder binder = BuildNewMetadataBinder(this.Configuration, navigationSource, elementType, generatedProperties, collapsed);
FilterBinder filterBinder = new FilterBinder(binder.Bind, binder.BindingState);
return(filterBinder.BindFilter(filterToken));
}
return(null);
}
/// <summary>
/// Parses a <paramref name="filter"/> clause, binding
/// the text into semantic nodes using the provided model.
/// </summary>
/// <param name="filter">String representation of the filter expression.</param>
/// <param name="configuration">The configuration used for binding.</param>
/// <param name="odataPathInfo">The path info from Uri path.</param>
/// <returns>A <see cref="FilterClause"/> representing the metadata bound filter expression.</returns>
private FilterClause ParseFilterImplementation(string filter, ODataUriParserConfiguration configuration, ODataPathInfo odataPathInfo)
{
ExceptionUtils.CheckArgumentNotNull(configuration, "configuration");
ExceptionUtils.CheckArgumentNotNull(odataPathInfo, "odataPathInfo");
ExceptionUtils.CheckArgumentNotNull(filter, "filter");
// Get the syntactic representation of the filter expression
UriQueryExpressionParser expressionParser = new UriQueryExpressionParser(configuration.Settings.FilterLimit, configuration.EnableCaseInsensitiveUriFunctionIdentifier);
QueryToken filterToken = expressionParser.ParseFilter(filter);
// Bind it to metadata
BindingState state = CreateBindingState(configuration, odataPathInfo);
MetadataBinder binder = new MetadataBinder(state);
FilterBinder filterBinder = new FilterBinder(binder.Bind, state);
FilterClause boundNode = filterBinder.BindFilter(filterToken);
return(boundNode);
}
/// <summary>
/// Generate an expand item (and a select item for the implicit nav prop if necessary) based on an ExpandTermToken
/// </summary>
/// <param name="tokenIn">the expandTerm token to visit</param>
/// <returns>the expand item for this expand term token.</returns>
private SelectItem GenerateExpandItem(ExpandTermToken tokenIn)
{
ExceptionUtils.CheckArgumentNotNull(tokenIn, "tokenIn");
PathSegmentToken currentToken = tokenIn.PathToNavigationProp;
IEdmStructuredType currentLevelEntityType = this.EdmType;
List <ODataPathSegment> pathSoFar = new List <ODataPathSegment>();
PathSegmentToken firstNonTypeToken = currentToken;
if (currentToken.IsNamespaceOrContainerQualified())
{
pathSoFar.AddRange(SelectExpandPathBinder.FollowTypeSegments(currentToken, this.Model, this.Settings.SelectExpandLimit, this.configuration.Resolver, ref currentLevelEntityType, out firstNonTypeToken));
}
IEdmProperty edmProperty = this.configuration.Resolver.ResolveProperty(currentLevelEntityType, firstNonTypeToken.Identifier);
if (edmProperty == null)
{
throw new ODataException(ODataErrorStrings.MetadataBinder_PropertyNotDeclared(currentLevelEntityType.FullTypeName(), currentToken.Identifier));
}
IEdmNavigationProperty currentNavProp = edmProperty as IEdmNavigationProperty;
IEdmStructuralProperty currentComplexProp = edmProperty as IEdmStructuralProperty;
if (currentNavProp == null && currentComplexProp == null)
{
throw new ODataException(ODataErrorStrings.ExpandItemBinder_PropertyIsNotANavigationPropertyOrComplexProperty(currentToken.Identifier, currentLevelEntityType.FullTypeName()));
}
if (currentComplexProp != null)
{
currentNavProp = ParseComplexTypesBeforeNavigation(currentComplexProp, ref firstNonTypeToken, pathSoFar);
}
// ensure that we're always dealing with proper V4 syntax
if (firstNonTypeToken.NextToken != null && firstNonTypeToken.NextToken.NextToken != null)
{
throw new ODataException(ODataErrorStrings.ExpandItemBinder_TraversingMultipleNavPropsInTheSamePath);
}
bool isRef = false;
if (firstNonTypeToken.NextToken != null)
{
// lastly... make sure that, since we're on a NavProp, that the next token isn't null.
if (firstNonTypeToken.NextToken.Identifier == UriQueryConstants.RefSegment)
{
isRef = true;
}
else
{
throw new ODataException(ODataErrorStrings.ExpandItemBinder_TraversingMultipleNavPropsInTheSamePath);
}
}
// Add the segments in select and expand to parsed segments
this.parsedSegments.AddRange(pathSoFar);
IEdmNavigationSource targetNavigationSource = null;
if (this.NavigationSource != null)
{
IEdmPathExpression bindingPath;
targetNavigationSource = this.NavigationSource.FindNavigationTarget(currentNavProp, BindingPathHelper.MatchBindingPath, this.parsedSegments, out bindingPath);
}
NavigationPropertySegment navSegment = new NavigationPropertySegment(currentNavProp, targetNavigationSource);
pathSoFar.Add(navSegment);
this.parsedSegments.Add(navSegment); // Add the navigation property segment to parsed segments for future usage.
ODataExpandPath pathToNavProp = new ODataExpandPath(pathSoFar);
// call MetadataBinder to build the filter clause
FilterClause filterOption = null;
if (tokenIn.FilterOption != null)
{
MetadataBinder binder = this.BuildNewMetadataBinder(targetNavigationSource);
FilterBinder filterBinder = new FilterBinder(binder.Bind, binder.BindingState);
filterOption = filterBinder.BindFilter(tokenIn.FilterOption);
}
// call MetadataBinder again to build the orderby clause
OrderByClause orderbyOption = null;
if (tokenIn.OrderByOptions != null)
{
MetadataBinder binder = this.BuildNewMetadataBinder(targetNavigationSource);
OrderByBinder orderByBinder = new OrderByBinder(binder.Bind);
orderbyOption = orderByBinder.BindOrderBy(binder.BindingState, tokenIn.OrderByOptions);
}
SearchClause searchOption = null;
if (tokenIn.SearchOption != null)
{
MetadataBinder binder = this.BuildNewMetadataBinder(targetNavigationSource);
SearchBinder searchBinder = new SearchBinder(binder.Bind);
searchOption = searchBinder.BindSearch(tokenIn.SearchOption);
}
if (isRef)
{
return(new ExpandedReferenceSelectItem(pathToNavProp, targetNavigationSource, filterOption, orderbyOption, tokenIn.TopOption, tokenIn.SkipOption, tokenIn.CountQueryOption, searchOption));
}
SelectExpandClause subSelectExpand;
if (tokenIn.ExpandOption != null)
{
subSelectExpand = this.GenerateSubExpand(tokenIn);
}
else
{
subSelectExpand = BuildDefaultSubExpand();
}
subSelectExpand = this.DecorateExpandWithSelect(subSelectExpand, currentNavProp, tokenIn.SelectOption);
LevelsClause levelsOption = this.ParseLevels(tokenIn.LevelsOption, currentLevelEntityType, currentNavProp);
return(new ExpandedNavigationSelectItem(pathToNavProp, targetNavigationSource, subSelectExpand, filterOption, orderbyOption, tokenIn.TopOption, tokenIn.SkipOption, tokenIn.CountQueryOption, searchOption, levelsOption));
}
