Issue-Ref:3514
Signed-off-by: Hernan Ponce de Leon <ponce@fortiss.org>

* The current implementation of the IPersistencyService does not
  allow to listen for "load" or "add" events during the startup of
  AF3 whereas later events for adding and removing IToplevelElements
  are present.
* Extend the PersistencyServiceListener and the IPersistencyService
  for such a capability to enable installing listeners for model
  elements in a plugin-in fashion.

Issue-Ref: 3514
Issue-Url: https://af3-developer.fortiss.org/issues/3514

Signed-off-by: Alexander Diewald <diewald@fortiss.org>

3203 extend the lambda utils

See merge request af3/kernel!18

Issue-Ref:3203
Signed-off-by: Hernan Ponce de Leon <ponce@fortiss.org>

It is already provided for collections and streams in Java 8.

Issue-Ref: 3203
Issue-Url: https://af3-developer.fortiss.org/issues/3203

Signed-off-by: Alexander Diewald <diewald@fortiss.org>

Issue-Ref: 3209
Issue-Url: https://af3-developer.fortiss.org/issues/3209

Signed-off-by: Alexander Diewald <diewald@fortiss.org>

1326 comments in code specification m

See merge request af3/kernel!15

Issue-ref:1326
Signed-off-by: Hernan Ponce de Leon <ponce@fortiss.org>

YELLOW
Signed-off-by: reaboi <reaboi@fortiss.org>

Issue-Ref:1306
Signed-off-by: Hernan Ponce de Leon <ponce@fortiss.org>

Issue-Ref: 1326
Issue-Url: https://af3-developer.fortiss.org/issues/1326

Signed-off-by: Hernan Ponce de Leon <ponce@fortiss.org>

YELLOW
Signed-off-by: reaboi <reaboi@fortiss.org>

Eliminate outdated and unused copy of JGraphT library

See merge request af3/kernel!12

Issue-Ref: 3478
Issue-Url: https://af3-developer.fortiss.org/issues/3478

Signed-off-by: Simon Barner <barner@fortiss.org>

3401 developer documentation kernel

See merge request af3/kernel!11

Issue-Ref:3401
Signed-off-by: Hernan Ponce de Leon <ponce@fortiss.org>

* Reference issue #3469 for remaining TODOs

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

Merge branch 'master' of https://git.fortiss.org/af3/kernel.git into 3401-developer_documentation_kernel

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

* Add UML diagram
* Description of metaclasses
* Clarify that there are two constraint services

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

JavaFX: Add Single-Node View support.

See merge request af3/kernel!10

* Add an abstract method for "initialize()".
* Fixed comments.

Issue-Ref: 3463
Issue-Url: https://af3-developer.fortiss.org/issues/3463

Signed-off-by: Alexander Diewald <diewald@fortiss.org>

Signed-off-by: Johannes Eder <eder@fortiss.org>

* Modify the constructors such that AF3FXViewParts can be created
  that only contain a single FX node/control, and do not come along
  with a FXML layout file.
* Due to signature conflicts, the css location must be given in the
  constructor. The default case is to use "null" such that the
  OS-native look is used.
* Add a method "setChildNodeFinal" that must be used to add the FX node
  to the view. It is not possible to do this in constructors since the
  FX toolkit is not initialized at this point in time.

Issue-Ref: 3463
Issue-Url: https://af3-developer.fortiss.org/issues/3463

Signed-off-by: Alexander Diewald <diewald@fortiss.org>

3459 check i ds avoid duplicate save

See merge request af3/kernel!8

Issue-Ref: 3459
Issue-Url: https://af3-developer.fortiss.org/issues/3459

Signed-off-by: Alexander Diewald <diewald@fortiss.org>

* Print list of all affected elements
* Indicate if it ID was missing or duplicated

Issue-Ref: 3459
Issue-Url: https://af3-developer.fortiss.org/issues/3459

Signed-off-by: Simon Barner <barner@fortiss.org>

Issue-Ref: 3459
Issue-Url: https://af3-developer.fortiss.org/issues/3459

Signed-off-by: Simon Barner <barner@fortiss.org>

* Introduction copied from:
https://af3-developer.fortiss.org/projects/autofocus3/wiki/Tooling_Kernel_Concepts_and_Services
* Details copied from: package.htmls

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>

* Mark ConstraintInstanceContainer deprecated
* Add TODOs for metaclasses related to constraints.

Issue-Ref: 3401
Issue-Url: https://af3-developer.fortiss.org/issues/3401

Signed-off-by: Simon Barner <barner@fortiss.org>