# Enum Class AdkMetadataKey

java.lang.Object
java.lang.Enum<AdkMetadataKey>
com.google.adk.a2a.converters.AdkMetadataKey

All Implemented Interfaces:
  `Serializable, Comparable<AdkMetadataKey>, Constable`

public enum AdkMetadataKey extends Enum<AdkMetadataKey>
Enum for the type of ADK metadata. Adds a prefix used to differentiate A2A-related values stored in custom metadata of an ADK session event.

- ## Nested Class Summary

  ### Nested classes/interfaces inherited from class Enum

  `Enum.EnumDesc<E>`

- ## Enum Constant Summary

  Enum Constants
  Enum Constant
  Description
  `CONTEXT_ID`
  `TASK_ID`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `String`
  `getType()`
  `static AdkMetadataKey`
  `valueOf(String name)`
  Returns the enum constant of this class with the specified name.
  `static AdkMetadataKey[]`
  `values()`
  Returns an array containing the constants of this enum class, in the order they are declared.

  ### Methods inherited from class Enum

  `clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

  ### Methods inherited from class Object

  `getClass, notify, notifyAll, wait, wait, wait`

- ## Enum Constant Details

  - ### TASK_ID

    public static final AdkMetadataKey TASK_ID

  - ### CONTEXT_ID

    public static final AdkMetadataKey CONTEXT_ID

- ## Method Details

  - ### values

    public static AdkMetadataKey[] values()
    Returns an array containing the constants of this enum class, in the order they are declared.
    Returns:
      an array containing the constants of this enum class, in the order they are declared

  - ### valueOf

    public static AdkMetadataKey valueOf(String name)
    Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
    Parameters:
      `name` - the name of the enum constant to be returned.
    Returns:
      the enum constant with the specified name
    Throws:
      `IllegalArgumentException` - if this enum class has no constant with the specified name
      `NullPointerException` - if the argument is null

  - ### getType

    public String getType()