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32 lines
1.9 KiB
Markdown
32 lines
1.9 KiB
Markdown
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# Semantic Description of `obitax` Package Functionalities
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The `obitax` package provides a robust iterator-based API for traversing taxonomic data structures in Go. Its core component is the `ITaxon` interface, which implements a lazy, concurrent-safe iterator over taxon instances (`*Taxon`). Key features include:
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- **Iterator Creation**: `ITaxon` can be instantiated via `NewITaxon()` or derived from collections:
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- `TaxonSet.Iterator()`, `TaxonSlice.Iterator()` (sorted), and `Taxonomy.nodes.Iterator()`
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- Goroutines feed taxa into a channel, enabling non-blocking iteration.
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- **Control Methods**:
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- `Next()` advances to the next taxon, returning success/failure.
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- `Get()` retrieves the current taxon (must follow a successful `Next`).
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- `Finished()` checks if iteration is complete.
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- **Channel Management**:
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- `Push(taxon)` sends a taxon into the iterator’s channel.
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- `Close()` terminates iteration by closing the source channel.
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- **Iterator Composition**:
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- `Split()`: creates a new iterator sharing the same source and termination status (useful for parallel consumption).
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- `Concat(...)`: merges multiple iterators sequentially into one.
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- **Metadata Enrichment**:
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- `AddMetadata(name, value)` wraps the iterator to inject metadata into each taxon via `SetMetadata`.
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- **Subtree Traversal**:
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- `ISubTaxonomy()` (on `*Taxon` or via `Taxonomy.ITaxon(taxid)`) performs a breadth-first traversal of descendant taxa, starting from the current taxon or given ID. It uses parent-child adjacency logic to expand the subtree incrementally.
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- **Consumption Utility**:
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- `Consume()` exhausts an iterator without processing (e.g., for side-effect-only pipelines).
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All iterators are designed to be composable, memory-efficient (via channels), and safe for concurrent use. The package integrates with `obiutils` to manage pipeline registration/unregistration during subtree expansion.
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