Constructor Detail

• Change

  protected Change(T jobj)

  Constructor.

  Parameters:

  jobj - Java model object that changed

  Throws:

  IllegalArgumentException - if jobj is null

Method Detail

• getObject

  public T getObject()

  Get the Java model object containing the field that changed.

  Although not declared as such to allow flexibility in Java model types, the returned object will always be a JObject instance.

  Returns:

  the changed object

• getJObject

  public JObject getJObject()

  Get the Java model object containing the field that changed.

  This is a convenience method, equivalent to:

  (JObject)getObject()

  Returns:

  the changed object as a JObject

• visit

  public abstract <R> R visit(ChangeSwitch<R> target)

  Apply visitor pattern. Invokes the method of target corresponding to this instance's type.

  Type Parameters:

  R - visitor return type

  Parameters:

  target - visitor pattern target

  Returns:

  value returned by the selected method of target

• apply

  public abstract void apply(JTransaction jtx,
           JObject jobj)

  Apply this change to the given object in the given transaction.

  Parameters:

  jobj - the target object to which to apply this change

  jtx - the transaction in which to apply this change

  Throws:

  NullPointerException - if jtx or jobj is null

  DeletedObjectException - if jobj does not exist in jtx

  UnknownFieldException - if jobj has a schema version that does not contain the affected field, or in which the affected field has a different type

  RuntimeException - if there is some other incompatibility between this change and the target object, for example, setting a list element at an index that is out of bounds

  StaleTransactionException - if jtx is no longer usable

• apply

  public void apply(JTransaction jtx)

  Apply this change to the object associated with this instance in the given transaction.

  This is a convenience method, equivalent to:

  apply(jtx, this.getJObject());

  Parameters:

  jtx - transaction in which to apply this change

  Throws:

  IllegalArgumentException - if jtx is null

• apply

  public void apply()

  Apply this change to the transaction associated with the current thread.

  This is a convenience method, equivalent to:

  apply(JTransaction.getCurrent())

  Throws:

  IllegalStateException - if there is no JTransaction associated with the current thread

• apply

  public void apply(JObject jobj)

  Apply this change to the specified object.

  This is a convenience method, equivalent to:

  apply(obj.getTransaction(), jobj);

  Parameters:

  jobj - object to which to apply this change

  Throws:

  IllegalStateException - if there is no JTransaction associated with jobj

  IllegalArgumentException - if jobj is null

• equals

  public boolean equals(Object obj)

  Overrides:

  equals in class Object

• hashCode

  public int hashCode()

  Overrides:

  hashCode in class Object