public static T MapValue <T>(object cypherValue)
{
var targetType = typeof(T);
if (typeof(IEnumerable).IsAssignableFrom(targetType))
{
if (!(cypherValue is IEnumerable enumerable))
{
throw new InvalidOperationException($"The cypher value is not a list and cannot be mapped to target type: {targetType.UnderlyingSystemType}");
}
if (targetType == typeof(string))
{
return(enumerable.As <T>());
}
var elementType = targetType.GetGenericArguments()[0];
var genericType = typeof(CollectionMapper <>).MakeGenericType(elementType);
var collectionMapper = (ICollectionMapper)genericType.CreateInstance();
return((T)collectionMapper.MapValues(enumerable, targetType));
}
if (cypherValue is INode node)
{
var entity = node.Properties.FromObjectDictionary <T>();
EntityAccessor.SetNodeId(entity, node.Id);
return(entity);
}
if (cypherValue is IRelationship relationship)
{
var entity = relationship.Properties.FromObjectDictionary <T>();
return(entity);
}
if (cypherValue is IReadOnlyDictionary <string, object> map)
{
return(map.FromObjectDictionary <T>());
}
if (cypherValue is IEnumerable)
{
throw new InvalidOperationException($"The cypher value is a list and cannot be mapped to target type: {targetType.UnderlyingSystemType}");
}
return(cypherValue.As <T>());
}
public static async Task <IResultCursor> SetNodeAsync <TEntity>(
this IAsyncTransaction asyncTransaction,
TEntity entity) where TEntity : class
{
var nodeId = EntityAccessor.GetNodeId(entity);
if (nodeId == null)
{
throw new InvalidOperationException(Constants.NodeIdUnspecifiedMessage);
}
var parameters = new Neo4jParameters()
.WithValue("p1", nodeId)
.WithEntity("p2", entity);
return(await asyncTransaction.RunAsync(Constants.Statement.SetNode, parameters)
.ConfigureAwait(false));
}