CosmosUniqueKey (Azure SDK for Java Reference Documentation)

```
@Inherited
@Retention(RUNTIME)
@Target(TYPE)
public @interface CosmosUniqueKey
```
Represents a unique key on that enforces uniqueness constraint on items in the container in the Azure Cosmos DB service.
1) For containers, the value of partition key is implicitly a part of each unique key.
2) Uniqueness constraint is also enforced for missing values.
For instance, if unique key policy defines a unique key with single property path, there could be only one item that has missing value for this property.

See Also:

CosmosUniqueKeyPolicy

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  String[] paths
  A set of paths which must be unique for each item in the Azure Cosmos DB service.

- Element Detail
  - paths
```
String[] paths
```
    A set of paths which must be unique for each item in the Azure Cosmos DB service.
    The paths to enforce uniqueness on. Each path is a rooted path of the unique property in the item, such as "/name/first".
    
    Returns:
    
    unique paths
    
    Default:
    
    {}