/// <summary>
/// Binds a an end path token into a PropertyAccessToken, OpenPropertyToken, or FunctionCallToken.
/// </summary>
/// <param name="endPathToken">The property access token to bind.</param>
/// <returns>A Query node representing this endpath token, bound to metadata.</returns>
internal QueryNode BindEndPath(EndPathToken endPathToken)
{
ExceptionUtils.CheckArgumentNotNull(endPathToken, "EndPathToken");
ExceptionUtils.CheckArgumentStringNotNullOrEmpty(endPathToken.Identifier, "EndPathToken.Identifier");
// Set the parent (get the parent type, so you can check whether the Identifier inside EndPathToken really is legit offshoot of the parent type)
QueryNode parent = this.DetermineParentNode(endPathToken);
QueryNode boundFunction;
SingleValueNode singleValueParent = parent as SingleValueNode;
if (singleValueParent == null)
{
if (functionCallBinder.TryBindEndPathAsFunctionCall(endPathToken, parent, state, out boundFunction))
{
return(boundFunction);
}
// Collection with any or all expression is already supported and handled separately.
// Add support of collection with $count segment.
CollectionNode colNode = parent as CollectionNode;
if (colNode != null && endPathToken.Identifier.Equals(UriQueryConstants.CountSegment))
{
// create a collection count node for collection node property.
return(new CountNode(colNode));
}
throw new ODataException(ODataErrorStrings.MetadataBinder_PropertyAccessSourceNotSingleValue(endPathToken.Identifier));
}
// Now that we have the parent type, can find its corresponding EDM type
IEdmStructuredTypeReference structuredParentType =
singleValueParent.TypeReference == null ? null : singleValueParent.TypeReference.AsStructuredOrNull();
IEdmProperty property =
structuredParentType == null ? null : this.Resolver.ResolveProperty(structuredParentType.StructuredDefinition(), endPathToken.Identifier);
if (property != null)
{
return(GeneratePropertyAccessQueryNode(singleValueParent as SingleResourceNode, property, state));
}
if (endPathToken.Identifier == ExpressionConstants.QueryOptionCount)
{
return(new CountVirtualPropertyNode());
}
if (functionCallBinder.TryBindEndPathAsFunctionCall(endPathToken, singleValueParent, state, out boundFunction))
{
return(boundFunction);
}
return(GeneratePropertyAccessQueryForOpenType(endPathToken, singleValueParent));
}
/// <summary>
/// Determines the parent node. If the token has a parent, that token is bound. If not, then we
/// use the implicit parameter from the BindingState as the parent node.
/// </summary>
/// <param name="segmentToken">Token to determine the parent node for.</param>
/// <returns>A SingleValueQueryNode that is the parent node of the <paramref name="segmentToken"/>.</returns>
private QueryNode DetermineParentNode(EndPathToken segmentToken)
{
ExceptionUtils.CheckArgumentNotNull(segmentToken, "segmentToken");
ExceptionUtils.CheckArgumentNotNull(state, "state");
if (segmentToken.NextToken != null)
{
return(this.bindMethod(segmentToken.NextToken));
}
else
{
RangeVariable implicitRangeVariable = state.ImplicitRangeVariable;
return(NodeFactory.CreateRangeVariableReferenceNode(implicitRangeVariable));
}
}
internal AggregateTokenBase ParseAggregateExpression()
{
try
{
this.parseAggregateExpresionDepth++;
// expression
QueryToken expression = ParseLogicalOr();
if (this.lexer.CurrentToken.Kind == ExpressionTokenKind.OpenParen)
{
// When there's a parenthesis after the expression we have a entity set aggregation.
// The syntax is the same as the aggregate expression itself, so we recurse on ParseAggregateExpressions.
this.aggregateExpressionParents.Push(expression);
List <AggregateTokenBase> statements = ParseAggregateExpressions();
this.aggregateExpressionParents.Pop();
return(new EntitySetAggregateToken(expression, statements));
}
AggregationMethodDefinition verb;
// "with" verb
EndPathToken endPathExpression = expression as EndPathToken;
if (endPathExpression != null && endPathExpression.Identifier == ExpressionConstants.QueryOptionCount)
{
// e.g. aggregate($count as Count)
verb = AggregationMethodDefinition.VirtualPropertyCount;
}
else
{
// e.g. aggregate(UnitPrice with sum as Total)
verb = this.ParseAggregateWith();
}
// "as" alias
StringLiteralToken alias = this.ParseAggregateAs();
return(new AggregateExpressionToken(expression, verb, alias.Text));
}
finally
{
this.parseAggregateExpresionDepth--;
}
}
/// <summary>
/// Try to bind an end path token as a function call. Used for bound functions without parameters
/// that parse as end path tokens syntactically
/// </summary>
/// <param name="endPathToken">the end path token to bind</param>
/// <param name="parent">the parent node to this end path token.</param>
/// <param name="state">the current state of the binding algorithm</param>
/// <param name="boundFunction">a single value function call node representing the function call, if it exists</param>
/// <returns>true if we found a function for this token, false otherwise.</returns>
internal bool TryBindEndPathAsFunctionCall(EndPathToken endPathToken, QueryNode parent, BindingState state, out QueryNode boundFunction)
{
return(this.TryBindIdentifier(endPathToken.Identifier, null, parent, state, out boundFunction));
}
/// <summary>
/// Build a segment from a token.
/// </summary>
/// <param name="tokenIn">the token to bind</param>
/// <param name="model">The model.</param>
/// <param name="edmType">the type of the current scope based on type segments.</param>
/// <param name="resolver">Resolver for uri parser.</param>
/// <param name="state">The binding state.</param>
/// <returns>The segment created from the token.</returns>
public static ODataPathSegment ConvertNonTypeTokenToSegment(PathSegmentToken tokenIn, IEdmModel model, IEdmStructuredType edmType, ODataUriResolver resolver, BindingState state = null)
{
ExceptionUtils.CheckArgumentNotNull(resolver, "resolver");
ODataPathSegment nextSegment;
if (UriParserHelper.IsAnnotation(tokenIn.Identifier))
{
if (TryBindAsDeclaredTerm(tokenIn, model, resolver, out nextSegment))
{
return(nextSegment);
}
string qualifiedTermName = tokenIn.Identifier.Remove(0, 1);
int separator = qualifiedTermName.LastIndexOf(".", StringComparison.Ordinal);
string namespaceName = qualifiedTermName.Substring(0, separator);
string termName = qualifiedTermName.Substring(separator == 0 ? 0 : separator + 1);
// Don't allow selecting odata control information
if (String.Compare(namespaceName, ODataConstants.ODataPrefix, StringComparison.OrdinalIgnoreCase) == 0)
{
throw new ODataException(ODataErrorStrings.UriSelectParser_TermIsNotValid(tokenIn.Identifier));
}
return(new AnnotationSegment(new EdmTerm(namespaceName, termName, EdmCoreModel.Instance.GetUntyped())));
}
EndPathToken endPathToken = new EndPathToken(tokenIn.Identifier, null);
if ((state?.IsCollapsed ?? false) && !(state?.AggregatedPropertyNames?.Contains(endPathToken) ?? false))
{
throw new ODataException(ODataErrorStrings.ApplyBinder_GroupByPropertyNotPropertyAccessValue(tokenIn.Identifier));
}
if (TryBindAsDeclaredProperty(tokenIn, edmType, resolver, out nextSegment))
{
return(nextSegment);
}
// Operations must be container-qualified, and because the token type indicates it was not a .-separated identifier, we should not try to look up operations.
if (tokenIn.IsNamespaceOrContainerQualified())
{
if (TryBindAsOperation(tokenIn, model, edmType, out nextSegment))
{
return(nextSegment);
}
// If an action or function is requested in a selectItem using a qualifiedActionName or a qualifiedFunctionName
// and that operation cannot be bound to the entities requested, the service MUST ignore the selectItem.
if (!edmType.IsOpen)
{
return(null);
}
}
if (edmType.IsOpen || (state?.AggregatedPropertyNames?.Contains(endPathToken) ?? false))
{
return(new DynamicPathSegment(tokenIn.Identifier));
}
throw new ODataException(ODataErrorStrings.MetadataBinder_PropertyNotDeclared(edmType.FullTypeName(), tokenIn.Identifier));
}
/// <summary>
/// This method generates a <see cref="SingleValueOpenPropertyAccessNode"/> for properties of open type
/// </summary>
/// <param name="endPathToken">EndPathToken to bind into an open property node.</param>
/// <param name="parentNode">Parent node of this open property</param>
/// <returns>Will return a <see cref="SingleValueOpenPropertyAccessNode"/> when open types are supported</returns>
internal SingleValueOpenPropertyAccessNode GeneratePropertyAccessQueryForOpenType(EndPathToken endPathToken, SingleValueNode parentNode)
{
if (parentNode.TypeReference == null ||
parentNode.TypeReference.Definition.IsOpen() ||
IsAggregatedProperty(endPathToken.Identifier))
{
return(new SingleValueOpenPropertyAccessNode(parentNode, endPathToken.Identifier));
}
else
{
throw new ODataException(ODataErrorStrings.MetadataBinder_PropertyNotDeclared(
parentNode.TypeReference.FullName(),
endPathToken.Identifier));
}
}
/// <summary>
/// Binds a property access token.
/// </summary>
/// <param name="endPathToken">The property access token to bind.</param>
/// <returns>The bound property access token.</returns>
protected virtual QueryNode BindEndPath(EndPathToken endPathToken)
{
EndPathBinder endPathBinder = new EndPathBinder(this.Bind, this.BindingState);
return(endPathBinder.BindEndPath(endPathToken));
}
/// <summary> /// Determines the token if represents an aggregated property or not. /// </summary> /// <param name="endPath">EndPathToken to check in the list of aggregated properties.</param> /// <returns>Whether the token represents an aggregated property.</returns> private bool IsAggregatedProperty(EndPathToken endPath) => state?.AggregatedPropertyNames?.Contains(endPath) ?? false;
/// <summary>
/// Visits an EndPathToken
/// </summary>
/// <param name="tokenIn">The EndPathToken to bind</param>
/// <returns>A PropertyAccessClause bound to this EndPathToken</returns>
public virtual T Visit(EndPathToken tokenIn)
{
throw new NotImplementedException();
}
/// <summary>
/// This method generates a <see cref="SingleValueOpenPropertyAccessNode"/> for properties of open type
/// </summary>
/// <param name="endPathToken">EndPathToken to bind into an open property node.</param>
/// <param name="parentNode">Parent node of this open property</param>
/// <returns>Will return a <see cref="SingleValueOpenPropertyAccessNode"/> when open types are supported</returns>
internal SingleValueOpenPropertyAccessNode GeneratePropertyAccessQueryForOpenType(EndPathToken endPathToken, SingleValueNode parentNode)
{
if (parentNode.TypeReference == null ||
parentNode.TypeReference.Definition.IsOpen() ||
IsAggregatedProperty(endPathToken.Identifier))
{
return(new SingleValueOpenPropertyAccessNode(parentNode, endPathToken.Identifier));
}
else
{
throw ExceptionUtil.CreatePropertyNotFoundException(endPathToken.Identifier, parentNode.TypeReference.FullName());
}
}
