Package org.apache.beam.sdk.transforms.display

Class DisplayData.Identifier

java.lang.Object

org.apache.beam.sdk.transforms.display.DisplayData.Identifier

All Implemented Interfaces:

Serializable

Enclosing class:

DisplayData

public abstract static class DisplayData.Identifier
extends Object
implements Serializable

Unique identifier for a display data item within a component.

Identifiers are composed of:

• A path based on the component hierarchy
• The key it is registered with
• A namespace generated from the class of the component which registered the item.

Display data registered with the same key from different components will have different namespaces and thus will both be represented in the composed DisplayData. If a single component registers multiple metadata items with the same key, only the most recent item will be retained; previous versions are discarded.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Identifier()

Method Summary

Modifier and Type	Method	Description
abstract String	getKey()
abstract Class<?>	getNamespace()
abstract DisplayData.Path	getPath()
static DisplayData.Identifier	of(DisplayData.Path path, Class<?> namespace, String key)
final String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

Identifier

public Identifier()

Method Details

getPath

public abstract DisplayData.Path getPath()

getNamespace

public abstract Class<?> getNamespace()

getKey

public abstract String getKey()

of

public static DisplayData.Identifier of(DisplayData.Path path,
 Class<?> namespace,
 String key)

toString

public final String toString()

Overrides:

toString in class Object