public PutRequest(AttributeCollection item)
{
Item = item;
}
public DbValue(AttributeCollection map)
{
this.kind = DbValueType.M;
this.value = map;
}
public PutItemRequest(string tableName, AttributeCollection item)
{
TableName = tableName ?? throw new ArgumentNullException(nameof(tableName));
Item = item ?? throw new ArgumentNullException(nameof(item));
}
public DynamoExpression(JsonObject attributeNames, AttributeCollection attributeValues)
{
AttributeNames = attributeNames;
AttributeValues = attributeValues;
}
public Task <PutItemResult> PutAsync(T entity)
{
var request = new PutItemRequest(tableName, AttributeCollection.FromObject(entity, metadata));
return(client.PutItemUsingRetryPolicyAsync(request, retryPolicy));
}
public GetItemResult(AttributeCollection item, ConsumedCapacity?consumedCapacity)
{
Item = item;
ConsumedCapacity = consumedCapacity;
}
public UpdateExpression(
IEnumerable <Change> changes,
JsonObject attributeNames,
AttributeCollection attributeValues)
{
this.attributeNames = attributeNames;
this.attributeValues = attributeValues;
foreach (var change in changes)
{
/*
* An update expression consists of sections.
* Each section begins with a SET, REMOVE, ADD or DELETE keyword.
* You can include any of these sections in an update expression in any order.
* However, each section keyword can appear only once.
*/
if (change.Operation == DataOperation.Remove)
{
// REMOVE (attributes)
// e.g. REMOVE Title, RelatedItems[2], Pictures.RearView
// DELETE (elements in set)
// e.g. Color :c (deleted :c from color set)
if (change.Value == null)
{
// Remove attribute
if (remove == null)
{
remove = new StringBuilder("REMOVE ");
}
WriteChange(change, remove);
}
else
{
// Delete element
if (delete == null)
{
delete = new StringBuilder("DELETE ");
}
WriteChange(change, delete);
}
}
else if (change.Operation == DataOperation.Add)
{
if (add == null)
{
add = new StringBuilder("ADD ");
}
WriteChange(change, add);
}
else if (change.Operation == DataOperation.Replace)
{
if (set == null)
{
set = new StringBuilder("SET ");
}
WriteChange(change, set);
}
else
{
throw new Exception("Unexpected change operation: " + change.Operation);
}
}
}
