[Feature] Copy constructor in base classes

[arnoweiss]

Currently, there's no proper way to copy a meta-model-instance. The classes don't implement Cloneable or offer a copy constructor. Especially when creating multiple instances of an object (like multiple Properties in a SubmodelElementList) from a template (single Property in a SubmodelElementList) this would come in quite handy.

[FrankSchnicke]

@sebbader-sap : Is there any chance to include a copy constructor in the model generator for the 1.0.0 release?

[sebbader-sap]

see for progress: sap-contributions#3

[mjacoby]

The current implementation does not create deep copies, e.g. when using to copy constructor to copy a Submodel, no (deep) copy of the SubmodelElements is done but rather it is copied by reference (see https://github.com/sap-contributions/aas4j/blob/4e2975ff28c4f045fd6e8e4b97966860a98fcdbe/model/src/main/java/org/eclipse/digitaltwin/aas4j/v3/model/impl/DefaultSubmodel.java#L93).

Not sure if this is intended. From my perspective, deep copy is what is needed.