org.apache.tapestry5
Interface Asset2

All Superinterfaces:

Asset

All Known Implementing Classes:

AbstractAsset

public interface Asset2
extends Asset

Extension to Asset that adds a method to determine if the asset is invariant or not. AssetFactory instances should ideally return Asset2 objects, not Asset. This is only of primary interest to the AssetBindingFactory, as it determines the invariance of the binding from the asset (and assumes variant unless the asset object implements this interface).

Since:

5.1.0.0

Method Summary

boolean

isInvariant() Returns true if the Asset is invariant (meaning that it returns the same value from Asset.toClientURL() at all times).

Methods inherited from interface org.apache.tapestry5.Asset

getResource, toClientURL

Method Detail

isInvariant

boolean isInvariant()

Returns true if the Asset is invariant (meaning that it returns the same value from Asset.toClientURL() at all times). Most Assets are invariant. Assets that are used as binding values will be cached more aggressively by Tapestry if they are invariant.

Returns:

true if invariant

See Also:

AssetPathConverter.isInvariant(), Binding.isInvariant()