/// <summary>
/// Parses a <paramref name="query"/> clause on the given <paramref name="elementType"/>, binding
/// the text into semantic nodes using the provided model.
/// </summary>
/// <param name="query">String representation of the filter expression.</param>
/// <param name="configuration">The configuration used for binding.</param>
/// <param name="elementType">Type that the filter clause refers to.</param>
/// <param name="navigationSource">Navigation source that the elements being filtered are from.</param>
/// <returns>A <see cref="FilterClause"/> representing the metadata bound filter expression.</returns>
internal static ExpressionClause ParseExpressionImplementation(string query, ODataUriParserConfiguration configuration, IEdmType elementType, IEdmNavigationSource navigationSource)
{
ExceptionUtils.CheckArgumentNotNull(configuration, "configuration");
ExceptionUtils.CheckArgumentNotNull(elementType, "elementType");
ExceptionUtils.CheckArgumentNotNull(query, "query");
// Get the syntactic representation of the filter expression
UriQueryExpressionParser expressionParser = new UriQueryExpressionParser(configuration.Settings.FilterLimit);
QueryToken expressionToken = expressionParser.ParseFilter(query);
// Bind it to metadata
BindingState state = new BindingState(configuration);
state.ImplicitRangeVariable = NodeFactory.CreateImplicitRangeVariable(elementType.ToTypeReference(), navigationSource);
state.RangeVariables.Push(state.ImplicitRangeVariable);
MetadataBinder binder = new MetadataBinder(state);
FilterBinder filterBinder = new FilterBinder(binder.Bind, state);
ExpressionClause boundNode = filterBinder.BindProperyExpression(expressionToken);
return(boundNode);
}