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Showing content from https://docs.oracle.com/en/java/javase/17/docs/api/jdk.jshell/jdk/jshell/SnippetEvent.html below:

SnippetEvent (Java SE 17 & JDK 17)

A description of a change to a Snippet. These are generated by direct changes to state with

or

, or indirectly by these same methods as dependencies change or Snippets are overwritten. For direct changes, the

is

.

SnippetEvent is immutable: an access to any of its methods will always return the same result. and thus is thread-safe.

Since:

9

• Method Summary

  Either the snippet whose change caused this update or null.

  boolean

  Indicates whether the signature has changed.

  The status before the transition.

  The Snippet which has changed

  Return a string representation of the event

  The result value of successful run.

• Method Details
  • snippet

    The Snippet which has changed

    Returns:

    the return the Snippet whose Status has changed.

  • previousStatus

    The status before the transition. If this event describes a Snippet creation return

    NONEXISTENT

    .

    Returns:

    the previousStatus

  • status

    The after status. Note: this may be the same as the previous status (not all changes cause a Status change.

    Returns:

    the status

  • isSignatureChange

    public boolean isSignatureChange()

    Indicates whether the signature has changed. Coming in or out of

    definition

    is always a signature change. An overwritten Snippet

    (status == OVERWRITTEN)

    is always

    false

    as responsibility for the definition has passed to the overwriting definition.

    Returns:

    true if the signature changed; otherwise false

  • causeSnippet

    Either the snippet whose change caused this update or

    null

    . This returns

    null

    if this change is the creation of a new Snippet via

    eval

    or it is the explicit drop of a Snippet with

    drop

    .

    Returns:

    the Snippet which caused this change or null if directly caused by an API action.

  • exception

    Returns:

    the exception or null.

  • value

    The result value of successful run. The value is null if not executed or an exception was thrown.

    Returns:

    the value or null.

  • toString

    Return a string representation of the event

    Overrides:

    toString in class Object

    Returns:

    a descriptive representation of the SnippetEvent

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