/// <summary>
/// Get the string representation of <see cref="ODataPath"/>.
/// mainly translate Context Url path.
/// </summary>
/// <param name="path">Path to perform the computation on.</param>
/// <returns>The string representation of the Context Url path.</returns>
public static string ToContextUrlPathString(this ODataPath path)
{
StringBuilder pathString = new StringBuilder();
PathSegmentToContextUrlPathTranslator pathTranslator = PathSegmentToContextUrlPathTranslator.DefaultInstance;
ODataPathSegment priorSegment = null;
foreach (ODataPathSegment segment in path)
{
OperationSegment operationSegment = segment as OperationSegment;
if (operationSegment != null)
{
bool isBoundPath = false;
if (priorSegment != null)
{
foreach (IEdmOperation operation in operationSegment.Operations)
{
if (operation.IsBound && operation.Parameters.First().Type.Definition == priorSegment.EdmType)
{
if (operation.EntitySetPath != null)
{
foreach (string pathSegment in operation.EntitySetPath.PathSegments.Skip(1))
{
pathString.Append('/');
pathString.Append(pathSegment);
}
isBoundPath = true;
}
break;
}
}
}
if (!isBoundPath)
{
if (operationSegment.EntitySet != null)
{
pathString = new StringBuilder();
pathString.Append(operationSegment.EntitySet.Name);
}
else
{
return(null);
}
}
}
else
{
pathString.Append(segment.TranslateWith(pathTranslator));
}
priorSegment = segment;
}
return(pathString.ToString().TrimStart('/'));
}
/// <summary>
/// Check if this segment is equal to another segment.
/// </summary>
/// <param name="other">the other segment to check.</param>
/// <returns>true if the other segment is equal.</returns>
/// <exception cref="System.ArgumentNullException">Throws if the input other is null.</exception>
internal override bool Equals(ODataPathSegment other)
{
ExceptionUtils.CheckArgumentNotNull(other, "other");
OperationSegment otherOperation = other as OperationSegment;
return(otherOperation != null &&
otherOperation.Operations.SequenceEqual(this.Operations) &&
otherOperation.EntitySet == this.entitySet);
}
/// <summary>
/// Translate a OperationSegment
/// </summary>
/// <param name="segment">the segment to Translate</param>
/// <returns>Defined by the implementer.</returns>
public override string Translate(OperationSegment segment)
{
Debug.Assert(segment != null, "segment != null");
string res = null;
NodeToStringBuilder nodeToStringBuilder = new NodeToStringBuilder();
foreach (OperationSegmentParameter operationSegmentParameter in segment.Parameters)
{
string tmp = nodeToStringBuilder.TranslateNode((QueryNode)operationSegmentParameter.Value);
res = String.Concat(res, String.IsNullOrEmpty(res) ? null : ExpressionConstants.SymbolComma, operationSegmentParameter.Name, ExpressionConstants.SymbolEqual, tmp);
}
return(String.IsNullOrEmpty(res) ? String.Concat("/", segment.Operations.OperationGroupFullName()) : String.Concat("/", segment.Operations.OperationGroupFullName(), ExpressionConstants.SymbolOpenParen, res, ExpressionConstants.SymbolClosedParen));
}
/// <summary>
/// Tries to bind a given token as an Operation.
/// </summary>
/// <param name="pathToken">Token to bind.</param>
/// <param name="model">The model.</param>
/// <param name="entityType">the current entity type to use as the binding type when looking for operations.</param>
/// <param name="segment">Bound segment if the token was bound to an operation successfully, or null.</param>
/// <returns>True if the token was bound successfully, or false otherwise.</returns>
internal static bool TryBindAsOperation(PathSegmentToken pathToken, IEdmModel model, IEdmStructuredType entityType, out ODataPathSegment segment)
{
Debug.Assert(pathToken != null, "pathToken != null");
Debug.Assert(entityType != null, "bindingType != null");
IEnumerable <IEdmOperation> possibleFunctions = Enumerable.Empty <IEdmOperation>();
IList <string> parameterNames = new List <string>();
// Catch all catchable exceptions as FindDeclaredBoundOperations is implemented by anyone.
// If an exception occurs it will be suppressed and the possible functions will be empty and return false.
try
{
int wildCardPos = pathToken.Identifier.IndexOf("*", StringComparison.Ordinal);
if (wildCardPos > -1)
{
string namespaceName = pathToken.Identifier.Substring(0, wildCardPos - 1);
possibleFunctions = model.FindBoundOperations(entityType).Where(o => o.Namespace == namespaceName);
}
else
{
NonSystemToken nonSystemToken = pathToken as NonSystemToken;
if (nonSystemToken != null && nonSystemToken.NamedValues != null)
{
parameterNames = nonSystemToken.NamedValues.Select(s => s.Name).ToList();
}
if (parameterNames.Count > 0)
{
// Always force to use fully qualified name when select operation
possibleFunctions = model.FindBoundOperations(entityType).FilterByName(true, pathToken.Identifier).FilterOperationsByParameterNames(parameterNames, false);
}
else
{
possibleFunctions = model.FindBoundOperations(entityType).FilterByName(true, pathToken.Identifier);
}
}
}
catch (Exception exc)
{
if (!ExceptionUtils.IsCatchableExceptionType(exc))
{
throw;
}
}
// Only filter if there is more than one and its needed.
if (possibleFunctions.Count() > 1)
{
possibleFunctions = possibleFunctions.FilterBoundOperationsWithSameTypeHierarchyToTypeClosestToBindingType(entityType);
}
// If more than one overload matches, try to select based on optional parameters
if (possibleFunctions.Count() > 1 && parameterNames.Count > 0)
{
possibleFunctions = possibleFunctions.FilterOverloadsBasedOnParameterCount(parameterNames.Count);
}
if (!possibleFunctions.HasAny())
{
segment = null;
return(false);
}
possibleFunctions.EnsureOperationsBoundWithBindingParameter();
segment = new OperationSegment(possibleFunctions, null /*entitySet*/);
return(true);
}
/// <summary>
/// Translate an OperationSegment
/// </summary>
/// <param name="segment">the segment to Translate</param>
/// <returns>Defined by the implementer.</returns>
public override string Translate(OperationSegment segment)
{
Debug.Assert(segment != null, "segment != null");
return("/" + segment.Operations.OperationGroupFullName());
}
/// <summary>
/// Handle an OperationSegment
/// </summary>
/// <param name="segment">the segment to Handle</param>
public virtual void Handle(OperationSegment segment)
{
throw new NotImplementedException();
}
/// <summary>
/// Get the string representation of <see cref="ODataPath"/>.
/// mainly translate Context Url path.
/// </summary>
/// <param name="path">Path to perform the computation on.</param>
/// <returns>The string representation of the Context Url path.</returns>
public static string ToContextUrlPathString(this ODataPath path)
{
StringBuilder pathString = new StringBuilder();
PathSegmentToContextUrlPathTranslator pathTranslator = PathSegmentToContextUrlPathTranslator.DefaultInstance;
ODataPathSegment priorSegment = null;
bool foundOperationWithoutPath = false;
foreach (ODataPathSegment segment in path)
{
OperationSegment operationSegment = segment as OperationSegment;
OperationImportSegment operationImportSegment = segment as OperationImportSegment;
if (operationImportSegment != null)
{
IEdmOperationImport operationImport = operationImportSegment.OperationImports.FirstOrDefault();
Debug.Assert(operationImport != null);
EdmPathExpression pathExpression = operationImport.EntitySet as EdmPathExpression;
if (pathExpression != null)
{
Debug.Assert(priorSegment == null); // operation import is always the first segment?
pathString.Append(pathExpression.Path);
}
else
{
pathString = operationImport.Operation.ReturnType != null ?
new StringBuilder(operationImport.Operation.ReturnType.FullName()) :
new StringBuilder("Edm.Untyped");
foundOperationWithoutPath = true;
}
}
else if (operationSegment != null)
{
IEdmOperation operation = operationSegment.Operations.FirstOrDefault();
Debug.Assert(operation != null);
if (operation.IsBound &&
priorSegment != null &&
operation.Parameters.First().Type.Definition == priorSegment.EdmType)
{
if (operation.EntitySetPath != null)
{
foreach (string pathSegment in operation.EntitySetPath.PathSegments.Skip(1))
{
pathString.Append('/');
pathString.Append(pathSegment);
}
}
else if (operationSegment.EntitySet != null)
{
// Is it correct to check EntitySet?
pathString = new StringBuilder(operationSegment.EntitySet.Name);
}
else
{
pathString = operation.ReturnType != null ?
new StringBuilder(operation.ReturnType.FullName()) :
new StringBuilder("Edm.Untyped");
foundOperationWithoutPath = true;
}
}
}
else
{
if (foundOperationWithoutPath)
{
pathString = new StringBuilder(segment.EdmType.FullTypeName());
foundOperationWithoutPath = false;
}
else
{
pathString.Append(segment.TranslateWith(pathTranslator));
}
}
priorSegment = segment;
}
return(pathString.ToString().TrimStart('/'));
}
/// <summary>
/// Handle an OperationSegment
/// </summary>
/// <param name="segment">the segment to Handle</param>
public override void Handle(OperationSegment segment)
{
CommonHandler(segment);
}
/// <summary>
/// Translate an OperationSegment
/// </summary>
/// <param name="segment">the segment to Translate</param>
/// <returns>Defined by the implementer.</returns>
public virtual T Translate(OperationSegment segment)
{
throw new NotImplementedException();
}
/// <summary>
/// Determine the NavigationSource of an OperationSegment
/// </summary>
/// <param name="segment">The OperationSegment to look in.</param>
/// <returns>The IEdmNavigationSource of this OperationSegment</returns>
/// <exception cref="System.ArgumentNullException">Throws if the input segment is null.</exception>
public override IEdmNavigationSource Translate(OperationSegment segment)
{
ExceptionUtils.CheckArgumentNotNull(segment, "segment");
return(segment.EntitySet);
}