/// <summary>
/// Bind a parameter alias which is inside another alias value.
/// </summary>
/// <param name="bindingState">The alias name which is inside another alias value.</param>
/// <param name="aliasToken">The cache of alias value nodes</param>
/// <returns>The semantics node tree for alias (the @p1 in "@p1=...", not alias value expression)</returns>
internal ParameterAliasNode BindParameterAlias(BindingState bindingState, FunctionParameterAliasToken aliasToken)
{
ExceptionUtils.CheckArgumentNotNull(bindingState, "bindingState");
ExceptionUtils.CheckArgumentNotNull(aliasToken, "aliasToken");
string alias = aliasToken.Alias;
ParameterAliasValueAccessor aliasValueAccessor = bindingState.Configuration.ParameterAliasValueAccessor;
if (aliasValueAccessor == null)
{
return(new ParameterAliasNode(alias, null));
}
// in cache?
SingleValueNode aliasValueNode = null;
if (!aliasValueAccessor.ParameterAliasValueNodesCached.TryGetValue(alias, out aliasValueNode))
{
// has value expression?
string aliasValueExpression = aliasValueAccessor.GetAliasValueExpression(alias);
if (aliasValueExpression == null)
{
aliasValueAccessor.ParameterAliasValueNodesCached[alias] = null;
}
else
{
aliasValueNode = this.ParseAndBindParameterAliasValueExpression(bindingState, aliasValueExpression, aliasToken.ExpectedParameterType);
aliasValueAccessor.ParameterAliasValueNodesCached[alias] = aliasValueNode;
}
}
return(new ParameterAliasNode(alias, aliasValueNode.GetEdmTypeReference()));
}
/// <summary>
/// Parses parameter alias into token.
/// </summary>
/// <param name="lexer">The lexer to use.</param>
/// <returns>The parameter alias token.</returns>
private static FunctionParameterAliasToken ParseParameterAlias(ExpressionLexer lexer)
{
Debug.Assert(lexer != null, "lexer != null");
FunctionParameterAliasToken ret = new FunctionParameterAliasToken(lexer.CurrentToken.Text);
lexer.NextToken();
return(ret);
}
/// <summary>
/// This is temp work around for $filter $orderby parameter expression which contains complex or collection
/// like "Fully.Qualified.Namespace.CanMoveToAddresses(addresses=[{\"Street\":\"NE 24th St.\",\"City\":\"Redmond\"},{\"Street\":\"Pine St.\",\"City\":\"Seattle\"}])";
/// TODO: $filter $orderby parameter expression which contains nested complex or collection should NOT be supported in this way
/// but should be parsed into token tree, and binded to node tree: parsedParameters.Select(p => this.bindMethod(p));
/// </summary>
/// <param name="model">The model.</param>
/// <param name="operation">IEdmFunction or IEdmOperation</param>
/// <param name="parameterTokens">The tokens to bind.</param>
/// <param name="enableCaseInsensitive">Whether to enable case-insensitive when resolving parameter name.</param>
/// <param name="enableUriTemplateParsing">Whether Uri template parsing is enabled.</param>
/// <returns>The FunctionParameterTokens with complex or collection values converted from string like "{...}", or "[..,..,..]".</returns>
private static ICollection <FunctionParameterToken> HandleComplexOrCollectionParameterValueIfExists(IEdmModel model, IEdmOperation operation, ICollection <FunctionParameterToken> parameterTokens, bool enableCaseInsensitive, bool enableUriTemplateParsing = false)
{
ICollection <FunctionParameterToken> partiallyParsedParametersWithComplexOrCollection = new Collection <FunctionParameterToken>();
foreach (FunctionParameterToken paraToken in parameterTokens)
{
FunctionParameterToken funcParaToken;
IEdmOperationParameter functionParameter = operation.FindParameter(paraToken.ParameterName);
if (enableCaseInsensitive && functionParameter == null)
{
functionParameter = ODataUriResolver.ResolveOperationParameterNameCaseInsensitive(operation, paraToken.ParameterName);
// The functionParameter can not be null here, else this method won't be called.
funcParaToken = new FunctionParameterToken(functionParameter.Name, paraToken.ValueToken);
}
else
{
funcParaToken = paraToken;
}
FunctionParameterAliasToken aliasToken = funcParaToken.ValueToken as FunctionParameterAliasToken;
if (aliasToken != null)
{
aliasToken.ExpectedParameterType = functionParameter.Type;
}
LiteralToken valueToken = funcParaToken.ValueToken as LiteralToken;
string valueStr = null;
if (valueToken != null && (valueStr = valueToken.Value as string) != null && !string.IsNullOrEmpty(valueToken.OriginalText))
{
ExpressionLexer lexer = new ExpressionLexer(valueToken.OriginalText, true /*moveToFirstToken*/, false /*useSemicolonDelimiter*/, true /*parsingFunctionParameters*/);
if (lexer.CurrentToken.Kind == ExpressionTokenKind.BracketedExpression || lexer.CurrentToken.Kind == ExpressionTokenKind.BracedExpression)
{
object result;
UriTemplateExpression expression;
if (enableUriTemplateParsing && UriTemplateParser.TryParseLiteral(lexer.CurrentToken.Text, functionParameter.Type, out expression))
{
result = expression;
}
else if (!functionParameter.Type.IsStructured() && !functionParameter.Type.IsStructuredCollectionType())
{
// ExpressionTokenKind.BracketedExpression means text like [1,2]
// so now try convert it to collection type value:
result = ODataUriUtils.ConvertFromUriLiteral(valueStr, ODataVersion.V4, model, functionParameter.Type);
}
else
{
// For complex & colleciton of complex directly return the raw string.
partiallyParsedParametersWithComplexOrCollection.Add(funcParaToken);
continue;
}
LiteralToken newValueToken = new LiteralToken(result, valueToken.OriginalText);
FunctionParameterToken newFuncParaToken = new FunctionParameterToken(funcParaToken.ParameterName, newValueToken);
partiallyParsedParametersWithComplexOrCollection.Add(newFuncParaToken);
continue;
}
}
partiallyParsedParametersWithComplexOrCollection.Add(funcParaToken);
}
return(partiallyParsedParametersWithComplexOrCollection);
}
/// <summary>
/// Bind parameter alias (figuring out its type by first parsing and binding its value expression).
/// </summary>
/// <param name="functionParameterAliasToken">The alias syntactics token.</param>
/// <returns>The semantics node for parameter alias.</returns>
protected virtual SingleValueNode BindParameterAlias(FunctionParameterAliasToken functionParameterAliasToken)
{
ParameterAliasBinder binder = new ParameterAliasBinder(this.Bind);
return(binder.BindParameterAlias(this.BindingState, functionParameterAliasToken));
}
