com.adobe.granite.asset.api

Interface Asset

All Superinterfaces:

Adaptable, Resource

public interface Asset
extends Resource

Asset represents a digital resource.

Asset is an extension of a Sling Resource, therefore its adaptable.

Asset is created by AssetManager and can be retrieved either via AssetManager or by adapting a asset Resource to an Asset.

     eg:
     // to create an asset
     AssetManager assetManager = resolver.adaptTo(AssetManager.class);
     Asset newAsset = assetManager.createAsset("/path/to/asset/document.pdf");

     // to get an existing asset
     Asset asset = assetManager.getAsset("/path/to/asset/document.pdf");

     // to get asset by adapting
     Asset asset = resource.adaptTo(Asset.class);
 

Asset properties can be retrieved or set by adapting it to a ValueMap.

     eg:
     // to get Asset properties value map
     ValueMap map = asset.adaptTo(ValueMap.class);
 

Implementor's Note: Implementations are required to provide an adapter to a writable ValueMap.

See Also:

AssetManager, ValueMap

Field Summary

Fields inherited from interface org.apache.sling.api.resource.Resource

RESOURCE_TYPE_NON_EXISTING

Method Summary

Modifier and Type	Method and Description
AssetRelation	addRelation(java.lang.String name, java.lang.String assetPath) adds a new relation to this Asset.
AssetRelation	addRelation(java.lang.String name, java.lang.String assetPath, java.util.Map<java.lang.String,java.lang.Object> map) Adds a new relation to this Asset with additional properties
AssetMetadata	getAssetMetadata() Returns the metadata of this Asset.
java.lang.String	getIdentifier() Get unique Asset identifier
Rendition	getRendition(java.lang.String name) Returns a named Rendition if available.
java.util.Iterator<? extends Asset>	listRelated(java.lang.String name) Get all related Asset with the given name.
java.util.Iterator<? extends AssetRelation>	listRelations(java.lang.String name) Get asset relations for a given relation name.
java.util.Iterator<? extends Rendition>	listRenditions() Returns an iterator for all Renditions of this asset.
void	orderRelationBefore(java.lang.String name, java.lang.String srcAssetPath, java.lang.String destAssetPath) This method inserts the related asset at srcAssetPath into the related asset list at the position immediately before the related asset at destAssetPath.
void	removeRelation(java.lang.String name) Removes all relations for the given name.
void	removeRelation(java.lang.String name, java.lang.String assetPath) Removes Asset relation.
void	removeRendition(java.lang.String name) Remove Rendition with the given name.
void	setRelation(java.lang.String name, java.lang.String assetPath) Deprecated. As of 1.3, please use addRelation(String, String)
Rendition	setRendition(java.lang.String name, java.io.InputStream is, java.util.Map<java.lang.String,java.lang.Object> map) Create or update the Rendition.

Methods inherited from interface org.apache.sling.api.resource.Resource

getChild, getChildren, getName, getParent, getPath, getResourceMetadata, getResourceResolver, getResourceSuperType, getResourceType, getValueMap, hasChildren, isResourceType, listChildren

Methods inherited from interface org.apache.sling.api.adapter.Adaptable

adaptTo

Method Detail

getRendition

Rendition getRendition(java.lang.String name)

Returns a named Rendition if available.

Parameters:

name - Name of the Rendition to get

Returns:

The Rendition object or null if Rendition with the given name cannot be found

Throws:

AssetException - If an error occurs trying to load the Rendition object

listRenditions

java.util.Iterator<? extends Rendition> listRenditions()

Returns an iterator for all Renditions of this asset.

Returns:

The Iterator of renditions or an empty iterator if no renditions has been created.

listRelated

java.util.Iterator<? extends Asset> listRelated(java.lang.String name)

Get all related Asset with the given name.

Parameters:

name - Name of the related asset collection

Returns:

Iterator of related Assets or an empty iterator if relations cannot be found with the given name.

listRelations

java.util.Iterator<? extends AssetRelation> listRelations(java.lang.String name)

Get asset relations for a given relation name.

Parameters:

name - Name of the relation

Returns:

Iterator of AssetRelation or an empty iterator if relations cannot be found with the given name.

Since:

1.3

getAssetMetadata

AssetMetadata getAssetMetadata()

Returns the metadata of this Asset.

Returns:

instance of AssetMetadata

Since:

1.8

addRelation

AssetRelation addRelation(java.lang.String name,
                          java.lang.String assetPath,
                          java.util.Map<java.lang.String,java.lang.Object> map)

Adds a new relation to this Asset with additional properties

Parameters:

name - of the relation to be created

assetPath - Path of the Asset to set a relation for

map - to be used to set additional relation properties.

Returns:

instance of AssetRelation

Throws:

AssetException - if Asset relation cannot be set.

Since:

1.3

setRelation

@Deprecated
void setRelation(java.lang.String name,
                             java.lang.String assetPath)

Deprecated. As of 1.3, please use addRelation(String, String)

Sets a new relation to this Asset.

Parameters:

name - of the relation to be created

assetPath - Path of the Asset to set a relation for

Throws:

AssetException - if Asset relation cannot be set.

addRelation

AssetRelation addRelation(java.lang.String name,
                          java.lang.String assetPath)

adds a new relation to this Asset.

Parameters:

name - of the relation to be created

assetPath - Path of the Asset to set a relation for

Returns:

instance of AssetRelation

Throws:

AssetException - if Asset relation cannot be set.

Since:

1.3

orderRelationBefore

void orderRelationBefore(java.lang.String name,
                         java.lang.String srcAssetPath,
                         java.lang.String destAssetPath)

This method inserts the related asset at srcAssetPath into the related asset list at the position immediately before the related asset at destAssetPath. To insert the related asset into last position, destAssetPath can be null.

Parameters:

name - Name of the relation to be ordered

srcAssetPath - asset path that needs to be moved in the order

destAssetPath - path of the related asset before which the srcAssetPath will be placed.

Throws:

java.lang.IllegalArgumentException - if srcAssetPath is null or srcAssetPath is not related to Asset. if srcAssetPath and destAssetPath represents the same Asset.

Since:

1.3

removeRelation

void removeRelation(java.lang.String name,
                    java.lang.String assetPath)

Removes Asset relation.

Parameters:

name - of the relation

assetPath - Path of the Asset to be removed from the relations

Throws:

AssetException - if relation cannot be deleted

removeRelation

void removeRelation(java.lang.String name)

Removes all relations for the given name.

Parameters:

name - of the relation

Throws:

AssetException - if relation cannot be deleted

getIdentifier

java.lang.String getIdentifier()

Get unique Asset identifier

Returns:

Asset identifier as String or null if Asset has no unique identifier

setRendition

Rendition setRendition(java.lang.String name,
                       java.io.InputStream is,
                       java.util.Map<java.lang.String,java.lang.Object> map)

Create or update the Rendition. If a rendition with the given name already exists, it will be replaced. Actual creation of rendition is delegated to the RenditionHandler.

Parameters:

name - to be used for this rendition

is - InputStream to create this rendition or null if stream is not required by the RenditionHandler

map - to be used by the rendition handler. If the map contains RenditionHandler.PROPERTY_ID, implementation is required to delegate to the RenditionHandler registered with this id. Otherwise, a default rendition handler must be used. Implementations are free to define the semantics of what constitutes a default rendition handler.

Returns:

newly created or updated rendition

Throws:

AssetException - if new rendition cannot be set

java.lang.NullPointerException - if the given map is null

removeRendition

void removeRendition(java.lang.String name)

Remove Rendition with the given name.

Parameters:

name - of the Rendition

Throws:

AssetException - if Rendition cannot be removed