AssetFactory (Tapestry API - 5.7.2)乐学网一站式学习平台

All Known Implementing Classes:

AbstractAssetFactory, ClasspathAssetFactory, ContextAssetFactory, ExternalUrlAssetFactory
```
public interface AssetFactory
```
Used by AssetSource to create new Assets as needed. Starting in Tapestry 5.4, the built-in implementations of this interface (for context assets, and for classpath assets) were changed so that when underlying resources changed, the client URLs for Assets are discarded; this is necessitated by two factors: 1) the client URL for an Asset now includes a checksum based on the content of the underlying resource, so a change to resource content (during development) results in a change to the URL. 2) JavaScriptStack (especially the ExtensibleJavaScriptStack implementation) made no provision for rebuilding the Assets post-construction, and there is no backwards compatible way to introduce this concept (and JavaScriptStacks are something many applications and third-party libraries make use of). So, starting in Tapestry 5.4, the implementations of Asset should be

See Also:

AssetSource

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Asset`	`createAsset(Resource resource)`	Creates an instance of an asset.
`Resource`	`getRootResource()`	Returns the Resource representing the root folder of the domain this factory is responsible for.

- Method Detail
  - getRootResource
```
Resource getRootResource()
```
    Returns the Resource representing the root folder of the domain this factory is responsible for.
  - createAsset
```
Asset createAsset(Resource resource)
```
    Creates an instance of an asset.
    
    Parameters:
    
    resource - a resource within this factories domain (derived from the root resource)
    
    Returns:
    
    an Asset for the resource