private QueryFilter ComposeQueryFilter(DynamoDBFlatConfig currentConfig, object hashKeyValue, IEnumerable <QueryCondition> conditions, ItemStorageConfig storageConfig, out List <string> indexNames)
{
if (hashKeyValue == null)
{
throw new ArgumentNullException("hashKeyValue");
}
// Set hash key property name
// In case of index queries, if GSI, different key could be used
string hashKeyProperty = storageConfig.HashKeyPropertyNames[0];
hashKeyProperty = storageConfig.GetCorrectHashKeyProperty(currentConfig, hashKeyProperty);
PropertyStorage propertyStorage = storageConfig.GetPropertyStorage(hashKeyProperty);
string hashAttributeName = propertyStorage.AttributeName;
DynamoDBEntry hashKeyEntry = ValueToDynamoDBEntry(propertyStorage, hashKeyValue, currentConfig);
if (hashKeyEntry == null)
{
throw new InvalidOperationException("Unable to convert hash key value for property " + hashKeyProperty);
}
Document hashKey = new Document();
hashKey[hashAttributeName] = hashKeyEntry;
return(ComposeQueryFilterHelper(currentConfig, hashKey, conditions, storageConfig, out indexNames));
}
private static QueryFilter ComposeQueryFilterHelper(Document hashKey, IEnumerable <QueryCondition> conditions, ItemStorageConfig storageConfig, DynamoDBFlatConfig currentConfig, out List <string> indexNames)
{
if (hashKey == null)
{
throw new ArgumentNullException("hashKey");
}
if (storageConfig.HashKeyPropertyNames.Count != 1)
{
throw new InvalidOperationException("Must have one hash key defined for the table " + storageConfig.TableName);
}
if (storageConfig.RangeKeyPropertyNames.Count != 1 && storageConfig.IndexNameToGSIMapping.Count == 0)
{
throw new InvalidOperationException("Must have one range key or a GSI index defined for the table " + storageConfig.TableName);
}
QueryFilter filter = new QueryFilter();
// Configure hash-key equality condition
string hashKeyProperty = storageConfig.HashKeyPropertyNames[0];
hashKeyProperty = storageConfig.GetCorrectHashKeyProperty(currentConfig, hashKeyProperty);
PropertyStorage propertyStorage = storageConfig.GetPropertyStorage(hashKeyProperty);
string attributeName = propertyStorage.AttributeName;
DynamoDBEntry hashValue = hashKey[attributeName];
filter.AddCondition(attributeName, QueryOperator.Equal, hashValue);
indexNames = new List <string>();
if (conditions != null)
{
foreach (QueryCondition condition in conditions)
{
object[] conditionValues = condition.Values;
PropertyStorage conditionProperty = storageConfig.GetPropertyStorage(condition.PropertyName);
if (conditionProperty.IsLSIRangeKey || conditionProperty.IsGSIKey)
{
indexNames.AddRange(conditionProperty.Indexes);
}
List <AttributeValue> attributeValues = new List <AttributeValue>();
foreach (var conditionValue in conditionValues)
{
DynamoDBEntry entry = ToDynamoDBEntry(conditionProperty, conditionValue);
AttributeValue attributeValue = entry.ConvertToAttributeValue();
attributeValues.Add(attributeValue);
}
filter.AddCondition(conditionProperty.AttributeName, condition.Operator, attributeValues);
}
}
return(filter);
}