com.facebook.rendercore

Interface ContentAllocator<Content>

All Known Implementing Classes:

Button, Card, CardClip, CardShadow, EditText, HorizontalScroll, HostRenderUnit, Image, MountSpecLithoRenderUnit, Progress, Recycler, RecyclerCollectionComponent, SizeSpecMountWrapperComponent, SolidColor, SpecGeneratedComponent, Spinner, TestComponent, TestDrawableComponent, TestLayoutComponent, TestSizeDependentComponent, TestTransitionComponent, TestViewComponent, Text, TextInput, TouchableFeedback, TransparencyEnabledCard, TransparencyEnabledCardClip, VerticalScroll, ViewCompatComponent, ViewPagerComponent, Wrapper

public interface ContentAllocator<Content>

Defines a class that can provide mountable content and have it be pooled.

Instances must implement at least createContent method to allocate the RenderUnit content (View or Drawable).

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_MAX_PREALLOCATION Default size of the content pool.

Method Summary

Modifier and Type	Method and Description
default boolean	canPreallocate() This API informs the framework to fill the content pool for this Mountable ahead of time.
Content	createContent(Context context) Allocates the mountable content (View or Drawable).
default Content	createPoolableContent(Context context) Creates a mount-content that can be pooled.
default MountItemsPool.ItemPool	createRecyclingPool() Creates an ItemPool for this mountable content.
default java.lang.Object	getPoolableContentType() Returns an object defining the type of the mount-content.
default boolean	isRecyclingDisabled() Return true if pooling should be disabled for this mount content.
default MountItemsPool.ItemPool	onCreateMountContentPool() Creates the content pool the framework should use for this Mountable.
default int	poolSize() This API informs the framework about the size of the content pool.

Field Detail

DEFAULT_MAX_PREALLOCATION

static final int DEFAULT_MAX_PREALLOCATION

Default size of the content pool.

See Also:

Constant Field Values

Method Detail

createContent

Content createContent(Context context)

Allocates the mountable content (View or Drawable).

createPoolableContent

default Content createPoolableContent(Context context)

Creates a mount-content that can be pooled. This is typically a View or Drawable subclass.

getPoolableContentType

default java.lang.Object getPoolableContentType()

Returns an object defining the type of the mount-content. Typically the mount-content's Class.

isRecyclingDisabled

default boolean isRecyclingDisabled()

Return true if pooling should be disabled for this mount content.

createRecyclingPool

default MountItemsPool.ItemPool createRecyclingPool()

Creates an ItemPool for this mountable content. Returning null will generate a default pool.

canPreallocate

default boolean canPreallocate()

This API informs the framework to fill the content pool for this Mountable ahead of time. The default value is false, i.e. content is not pre-allocated. Pre-allocation of the content can improve performance in some circumstances where creating the content is expensive.

Returns:

true to preallocate the content, otherwise false

Experimental. Currently for Litho team internal use only.

poolSize

default int poolSize()

This API informs the framework about the size of the content pool. The default is 3.

Experimental. Currently for Litho team internal use only.

onCreateMountContentPool

default MountItemsPool.ItemPool onCreateMountContentPool()

Creates the content pool the framework should use for this Mountable.

Experimental. Currently for Litho team internal use only.