private AggregateExpressionBase BindAggregateExpressionToken(AggregateTokenBase aggregateToken)
{
switch (aggregateToken.Kind)
{
case QueryTokenKind.AggregateExpression:
{
AggregateExpressionToken token = aggregateToken as AggregateExpressionToken;
SingleValueNode expression = this.bindMethod(token.Expression) as SingleValueNode;
IEdmTypeReference typeReference = CreateAggregateExpressionTypeReference(expression, token.MethodDefinition);
// TODO: Determine source
return(new AggregateExpression(expression, token.MethodDefinition, token.Alias, typeReference));
}
case QueryTokenKind.EntitySetAggregateExpression:
{
EntitySetAggregateToken token = aggregateToken as EntitySetAggregateToken;
QueryNode boundPath = this.bindMethod(token.EntitySet);
state.InEntitySetAggregation = true;
IEnumerable <AggregateExpressionBase> children = token.Expressions.Select(x => BindAggregateExpressionToken(x)).ToList();
state.InEntitySetAggregation = false;
return(new EntitySetAggregateExpression((CollectionNavigationNode)boundPath, children));
}
default:
throw new ODataException(ODataErrorStrings.ApplyBinder_UnsupportedAggregateKind(aggregateToken.Kind));
}
}
private static IEnumerable <AggregateTokenBase> MergeEntitySetAggregates(IEnumerable <AggregateTokenBase> tokens)
{
List <AggregateTokenBase> mergedTokens = new List <AggregateTokenBase>();
Dictionary <string, AggregateTokenBase> entitySetTokens = new Dictionary <string, AggregateTokenBase>();
foreach (AggregateTokenBase token in tokens)
{
switch (token.Kind)
{
case QueryTokenKind.EntitySetAggregateExpression:
{
AggregateTokenBase currentValue;
EntitySetAggregateToken entitySetToken = token as EntitySetAggregateToken;
string key = entitySetToken.Path();
if (entitySetTokens.TryGetValue(key, out currentValue))
{
entitySetTokens.Remove(key);
}
entitySetTokens.Add(key, EntitySetAggregateToken.Merge(entitySetToken, currentValue as EntitySetAggregateToken));
break;
}
case QueryTokenKind.AggregateExpression:
{
mergedTokens.Add(token);
break;
}
}
}
return(mergedTokens.Concat(entitySetTokens.Values).ToList());
}
