com.im.df.api.ddl
Interface DFItem.Handle<T extends DFItem>

Enclosing interface:

DFItem

public static interface DFItem.Handle<T extends DFItem>

Represents a handle-like identifier of the item. Since the Item's ID may not be unique (e.g. when a Schema was replicated/copied), an additional context must be kept in order to uniquely identify DFItems across DFSchemas. Handle encapsulates such a context, but does not expose its details. The Handle is implemented so that equals() and hashCode() satisfy the equals/comparator contracts. It does not keep the original DFItem alive - a Reference is used to track the instance. Note that Handle is not serializable. The DFItem cannot be identified by a Handle instance across application runs. The Handle can be used instead of the DFItem in various lookup Maps.

Method Summary

Object	getId()
T	getInstance() Returns the original DFItem instance.

Method Detail

getId

Object getId()

Returns:

The ID of the original DFItem

getInstance

T getInstance()

Returns the original DFItem instance. May return null if the item was already garbage-collected.

Returns:

The instance of the original DFItem, or null if the DFItem is gone.