# FakeShuffleOrder
# FakeShuffleOrder
Artifact:[androidx.media3:media3-test-utils](https://developer.android.com/jetpack/androidx/releases/media3)
[View Source](https://cs.android.com/search?q=file:androidx/media3/test/utils/FakeShuffleOrder.java+class:androidx.media3.test.utils.FakeShuffleOrder)
*** ** * ** ***
Kotlin\|[Java](https://developer.android.com/reference/androidx/media3/test/utils/FakeShuffleOrder "View this page in Java")
```
@UnstableApi
class FakeShuffleOrder : ShuffleOrder
```
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Fake[ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)which returns a reverse order. This order is thus deterministic but different from the original order.
## Summary
| ### Public constructors |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [FakeShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/test/utils/FakeShuffleOrder#FakeShuffleOrder(int))`(length: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`)` |
| ### Public functions |
|-----------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)`!` | [cloneAndClear](https://developer.android.com/reference/kotlin/androidx/media3/test/utils/FakeShuffleOrder#cloneAndClear())`()` Returns a copy of the shuffle order with all elements removed. |
| [ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)`!` | [cloneAndInsert](https://developer.android.com/reference/kotlin/androidx/media3/test/utils/FakeShuffleOrder#cloneAndInsert(int,int))`(insertionIndex: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`, insertionCount: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`)` Returns a copy of the shuffle order with newly inserted elements. |
| [ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)`!` | [cloneAndRemove](https://developer.android.com/reference/kotlin/androidx/media3/test/utils/FakeShuffleOrder#cloneAndRemove(int,int))`(indexFrom: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`, indexToExclusive: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`)` Returns a copy of the shuffle order with a range of elements removed. |
| [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [getFirstIndex](https://developer.android.com/reference/kotlin/androidx/media3/test/utils/FakeShuffleOrder#getFirstIndex())`()` Returns the first index in the shuffle order, or[INDEX_UNSET](https://developer.android.com/reference/kotlin/androidx/media3/common/C#INDEX_UNSET())if the shuffle order is empty. |
| [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [getLastIndex](https://developer.android.com/reference/kotlin/androidx/media3/test/utils/FakeShuffleOrder#getLastIndex())`()` Returns the last index in the shuffle order, or[INDEX_UNSET](https://developer.android.com/reference/kotlin/androidx/media3/common/C#INDEX_UNSET())if the shuffle order is empty. |
| [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [getNextIndex](https://developer.android.com/reference/kotlin/androidx/media3/test/utils/FakeShuffleOrder#getNextIndex(int))`(index: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`)` Returns the next index in the shuffle order. |
| [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [getPreviousIndex](https://developer.android.com/reference/kotlin/androidx/media3/test/utils/FakeShuffleOrder#getPreviousIndex(int))`(index: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`)` Returns the previous index in the shuffle order. |
| ### Public properties |
|-----------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [length](https://developer.android.com/reference/kotlin/androidx/media3/test/utils/FakeShuffleOrder#length()) |
| ### Inherited functions |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| From[androidx.media3.exoplayer.source.ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder) |-----------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)`!` | [cloneAndMove](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder#cloneAndMove(int,int,int))`(indexFrom: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`, indexToExclusive: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`, newIndexFrom: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`)` Returns a copy of the shuffle order to be used after a move. | | [ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)`!` | [cloneAndSet](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder#cloneAndSet(int,int))`(insertionCount: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`, startIndex: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`)` Returns a copy of the shuffle order with all elements replaced. | |
## Public constructors
### FakeShuffleOrder
```
FakeShuffleOrder(length: Int)
```
## Public functions
### cloneAndClear
```
fun cloneAndClear(): ShuffleOrder!
```
Returns a copy of the shuffle order with all elements removed.
### cloneAndInsert
```
fun cloneAndInsert(insertionIndex: Int, insertionCount: Int): ShuffleOrder!
```
Returns a copy of the shuffle order with newly inserted elements.
| Parameters |
|-----------------------------------------------------------------------------------------------|-------------------------------------------------------------------|
| `insertionIndex: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | The index in the unshuffled order at which elements are inserted. |
| `insertionCount: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | The number of elements inserted at`insertionIndex`. |
| Returns |
|-----------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------|
| [ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)`!` | A copy of this[ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)with newly inserted elements. |
### cloneAndRemove
```
fun cloneAndRemove(indexFrom: Int, indexToExclusive: Int): ShuffleOrder!
```
Returns a copy of the shuffle order with a range of elements removed.
| Parameters |
|-------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------|
| `indexFrom: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | The starting index in the unshuffled order of the range to remove. |
| `indexToExclusive: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | The smallest index (must be greater or equal to`indexFrom`) that will not be removed. |
| Returns |
|-----------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)`!` | A copy of this[ShuffleOrder](https://developer.android.com/reference/kotlin/androidx/media3/exoplayer/source/ShuffleOrder)without the elements in the removed range. |
### getFirstIndex
```
fun getFirstIndex(): Int
```
Returns the first index in the shuffle order, or[INDEX_UNSET](https://developer.android.com/reference/kotlin/androidx/media3/common/C#INDEX_UNSET())if the shuffle order is empty.
### getLastIndex
```
fun getLastIndex(): Int
```
Returns the last index in the shuffle order, or[INDEX_UNSET](https://developer.android.com/reference/kotlin/androidx/media3/common/C#INDEX_UNSET())if the shuffle order is empty.
### getNextIndex
```
fun getNextIndex(index: Int): Int
```
Returns the next index in the shuffle order.
| Parameters |
|--------------------------------------------------------------------------------------|-----------|
| `index: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | An index. |
| Returns |
|-----------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | The index after`index`, or[INDEX_UNSET](https://developer.android.com/reference/kotlin/androidx/media3/common/C#INDEX_UNSET())if`index`is the last element. |
### getPreviousIndex
```
fun getPreviousIndex(index: Int): Int
```
Returns the previous index in the shuffle order.
| Parameters |
|--------------------------------------------------------------------------------------|-----------|
| `index: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | An index. |
| Returns |
|-----------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | The index before`index`, or[INDEX_UNSET](https://developer.android.com/reference/kotlin/androidx/media3/common/C#INDEX_UNSET())if`index`is the first element. |
## Public properties
### length
```
val length: Int
```