Cpaulyz opened a new pull request, #8721:
URL: https://github.com/apache/iotdb/pull/8721
## Description
1. Separate filtering and business logic in AbstractTreeVisitor.
```
/**
* Internal-match means the node matches an internal node name of the
given path pattern. root.sg
* internal match root.sg.**(pattern). This method should be implemented
according to concrete
* tasks.
*
* <p>Return whether the subtree of given node should be processed. If
return true, the traversing
* process will keep traversing the subtree. If return false, the
traversing process will skip the
* subtree of given node.
*/
protected abstract boolean processInternalMatchedNode(N node) throws
Exception;
/**
* Full-match means the node matches the last node name of the given path
pattern. root.sg.d full
* match root.sg.**(pattern) This method should be implemented according
to concrete tasks.
*
* <p>Return whether the subtree of given node should be processed. If
return true, the traversing
* process will keep traversing the subtree. If return false, the
traversing process will skip the
* subtree of given node.
*/
protected abstract boolean processFullMatchedNode(N node) throws Exception;
/** Only accepted nodes will be considered for hasNext() and next() */
protected abstract boolean acceptNode(N node) throws Exception;
```
2. Injecting logic for releasing node resources in the AbstractTreeVistor
framework. In ClusterSchemaTreeTest, a Mock test class
`MockSchemaTreeMeasurementVisitor` is used to simulate the pin and unpin
process to test this releasing logic.
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