FindUserHelper (Atlassian Confluence 8.8.0 API)

java.lang.Object
- com.atlassian.confluence.user.persistence.dao.compatibility.FindUserHelper

```
public class FindUserHelper
extends Object
```
A utility class that centralises the 'hackyness' involved during the period we support both username related APIs and the change to user keys.
Find all usages of this class and you will find all the places that 'transitional hackyness' is taking place.

Constructor Summary

Constructors
Constructor Description

FindUserHelper()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static ConfluenceUser`	`getUser(@Nullable com.atlassian.user.User user)`
`static ConfluenceUser`	`getUserByUserKey(com.atlassian.sal.api.user.UserKey userKey)`	Get a user by `UserKey`
`static @Nullable ConfluenceUser`	`getUserByUsername(@Nullable String username)`	Get a user by username.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FindUserHelper
```
public FindUserHelper()
```
- Method Detail
  - getUserByUsername
```
public static @Nullable ConfluenceUser getUserByUsername(@Nullable String username)
```
    Get a user by username.
    
    Parameters:
    
    username - the username of the user required
    
    Returns:
    
    user with the given username or null if the username is null or empty or no user is found.
  - getUserByUserKey
```
public static ConfluenceUser getUserByUserKey(com.atlassian.sal.api.user.UserKey userKey)
```
    Get a user by UserKey
    
    Parameters:
    
    userKey -
    
    Returns:
    
    the identified user
    
    Throws:
    
    IllegalArgumentException - if no user can be found for the key
  - getUser
```
public static ConfluenceUser getUser(@Nullable com.atlassian.user.User user)
```
    Returns:
    
    ConfluenceUser for the given user