# TypeConverters

Summary:[Methods](https://developer.android.com/reference/android/arch/persistence/room/TypeConverters#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/arch/persistence/room/TypeConverters#inhmethods)  

# TypeConverters

| The`android.arch`Architecture Components packages are no longer maintained. They have been superseded by the corresponding[androidx.\*](https://developer.android.com/jetpack/androidx/migrate)packages. See[androidx.room.TypeConverters](https://developer.android.com/reference/androidx/room/TypeConverters)instead.

`
public


abstract
@interface
TypeConverters
`  
`


implements

Annotation


`

|----------------------------------------------|
| android.arch.persistence.room.TypeConverters |

<br />

*** ** * ** ***

Specifies additional type converters that Room can use. The TypeConverter is added to the scope of the element so if you put it on a class / interface, all methods / fields in that class will be able to use the converters.

- If you put it on a[Database](https://developer.android.com/reference/android/arch/persistence/room/Database), all Daos and Entities in that database will be able to use it.
- If you put it on a[Dao](https://developer.android.com/reference/android/arch/persistence/room/Dao), all methods in the Dao will be able to use it.
- If you put it on an[Entity](https://developer.android.com/reference/android/arch/persistence/room/Entity), all fields of the Entity will be able to use it.
- If you put it on a POJO, all fields of the POJO will be able to use it.
- If you put it on an[Entity](https://developer.android.com/reference/android/arch/persistence/room/Entity)field, only that field will be able to use it.
- If you put it on a[Dao](https://developer.android.com/reference/android/arch/persistence/room/Dao)method, all parameters of the method will be able to use it.
- If you put it on a[Dao](https://developer.android.com/reference/android/arch/persistence/room/Dao)method parameter, just that field will be able to use it.

<br />

**See also:**

- [TypeConverter](https://developer.android.com/reference/android/arch/persistence/room/TypeConverter)

## Summary

|                                                                        ### Public methods                                                                        ||
|---------------|---------------------------------------------------------------------------------------------------------------------------------------------------|
| ` Class[]<?>` | ` `[value](https://developer.android.com/reference/android/arch/persistence/room/TypeConverters#value())`() ` The list of type converter classes. |

| ### Inherited methods |
|-----------------------|---|
| From interface` java.lang.annotation.Annotation ` |-----------------------------------------|-------------------------| | ` abstract Class<? extends Annotation>` | ` annotationType() `    | | ` abstract boolean`                     | ` equals(Object arg0) ` | | ` abstract int`                         | ` hashCode() `          | | ` abstract String`                      | ` toString() `          | ||

## Public methods

### value

```
Class[]<?> value ()
```

The list of type converter classes. If converter methods are not static, Room will create an instance of these classes.

<br />

|                                    Returns                                    ||
|--------------|-----------------------------------------------------------------|
| `Class[]<?>` | The list of classes that contains the converter methods. <br /> |

-

  ## Annotations

  - [ColumnInfo](https://developer.android.com/reference/android/arch/persistence/room/ColumnInfo)
  - [ColumnInfo.Collate](https://developer.android.com/reference/android/arch/persistence/room/ColumnInfo.Collate)
  - [ColumnInfo.SQLiteTypeAffinity](https://developer.android.com/reference/android/arch/persistence/room/ColumnInfo.SQLiteTypeAffinity)
  - [Dao](https://developer.android.com/reference/android/arch/persistence/room/Dao)
  - [Database](https://developer.android.com/reference/android/arch/persistence/room/Database)
  - [Delete](https://developer.android.com/reference/android/arch/persistence/room/Delete)
  - [Embedded](https://developer.android.com/reference/android/arch/persistence/room/Embedded)
  - [Entity](https://developer.android.com/reference/android/arch/persistence/room/Entity)
  - [ForeignKey](https://developer.android.com/reference/android/arch/persistence/room/ForeignKey)
  - [ForeignKey.Action](https://developer.android.com/reference/android/arch/persistence/room/ForeignKey.Action)
  - [Ignore](https://developer.android.com/reference/android/arch/persistence/room/Ignore)
  - [Index](https://developer.android.com/reference/android/arch/persistence/room)
  - [Insert](https://developer.android.com/reference/android/arch/persistence/room/Insert)
  - [OnConflictStrategy](https://developer.android.com/reference/android/arch/persistence/room/OnConflictStrategy)
  - [PrimaryKey](https://developer.android.com/reference/android/arch/persistence/room/PrimaryKey)
  - [Query](https://developer.android.com/reference/android/arch/persistence/room/Query)
  - [RawQuery](https://developer.android.com/reference/android/arch/persistence/room/RawQuery)
  - [Relation](https://developer.android.com/reference/android/arch/persistence/room/Relation)
  - [SkipQueryVerification](https://developer.android.com/reference/android/arch/persistence/room/SkipQueryVerification)
  - [Transaction](https://developer.android.com/reference/android/arch/persistence/room/Transaction)
  - [TypeConverter](https://developer.android.com/reference/android/arch/persistence/room/TypeConverter)
  - [TypeConverters](https://developer.android.com/reference/android/arch/persistence/room/TypeConverters)
  - [Update](https://developer.android.com/reference/android/arch/persistence/room/Update)
-

  ## Classes

  - [DatabaseConfiguration](https://developer.android.com/reference/android/arch/persistence/room/DatabaseConfiguration)
  - [InvalidationTracker](https://developer.android.com/reference/android/arch/persistence/room/InvalidationTracker)
  - [InvalidationTracker.Observer](https://developer.android.com/reference/android/arch/persistence/room/InvalidationTracker.Observer)
  - [Room](https://developer.android.com/reference/android/arch/persistence/room/Room)
  - [RoomDatabase](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase)
  - [RoomDatabase.Builder](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.Builder)
  - [RoomDatabase.Callback](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.Callback)
  - [RoomDatabase.MigrationContainer](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.MigrationContainer)
  - [RoomWarnings](https://developer.android.com/reference/android/arch/persistence/room/RoomWarnings)
  - [RxRoom](https://developer.android.com/reference/android/arch/persistence/room/RxRoom)
-

  ## Enums

  - [RoomDatabase.JournalMode](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.JournalMode)
-

  ## Exceptions

  - [EmptyResultSetException](https://developer.android.com/reference/android/arch/persistence/room/EmptyResultSetException)