Michael Dürig created OAK-798:
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Summary: Review / refactor TreeImpl and related classes
Key: OAK-798
URL: https://issues.apache.org/jira/browse/OAK-798
Project: Jackrabbit Oak
Issue Type: Improvement
Components: core
Reporter: Michael Dürig
Now that OAK-781 is nearly complete, I'd like to follow up with pulling the new
functionality into {{TreeImpl}} and its friends. A rough sketch of what I have
in mind:
* Apply the concept of existence and iterability of nodes to {{Tree}}
instances. So {{Tree}} would have a method {{exists}} with the same semantics
as that on {{NodeBuilder}}. Namely non existing trees could be used to navigate
to its children/parent. But can not be used to iterate children/properties nor
to modify the tree in any way.
* {{TreeLocation}} and its implementations would go away since trees could be
navigated by its own means now.
* Provide two {{Tree}} implementations: {{MutableTree}} and {{ImmutableTree}}.
The former would replace {{TreeImpl}} and the latter would unify the current
{{ReadOnlyTree}} and {{ImmutableTree}} implementations. Roughly the former
would be based on {{NodeBuilder}} while the latter would be based on
{{NodeState}}. Only the latter would implement {{equals}} such that two such
trees are equal when its underlying node states and its names are equal.
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