Struct BackendFactory 

pub struct BackendFactory;

Factory for creating backend instances from names.

Implementations

impl BackendFactory

pub fn create(backend_name: &str) -> Result<Box<dyn Model>>

Create a backend instance from a name.

Supported Backends

Always Available

• pattern / RegexNER - Pattern-based NER
• heuristic / HeuristicNER - Heuristic NER
• stacked / StackedNER - Stacked NER

ONNX Feature Required

• bert_onnx / BertNEROnnx - BERT ONNX NER
• gliner_onnx / GLiNEROnnx - GLiNER ONNX (zero-shot)
• nuner / NuNER - NuNER (zero-shot, token-based)
• w2ner / W2NER - W2NER (discontinuous NER)
• gliner_multitask / GLiNERMultitaskOnnx - GLiNERMultitask multi-task

Candle Feature Required

• candle_ner / CandleNER - Candle BERT NER
• gliner_candle / GLiNERCandle - GLiNER Candle (zero-shot)
• gliner_multitask_candle / GLiNERMultitaskCandle - GLiNERMultitask Candle

Coreference

• coref_resolver / SimpleCorefResolver - Simple coreference resolver

Example

use anno_eval::eval::backend_factory::BackendFactory;

let backend = BackendFactory::create("pattern")?;
let entities = backend.extract_entities("Meeting on Jan 15", None)?;

pub fn available_backends() -> Vec<&'static str>

List all available backends (based on enabled features).

pub fn available_coref_resolvers() -> Vec<&'static str>

List all available coreference resolvers.

Coreference resolvers are not Models, so they are kept separate from Self::available_backends. They are used by TaskEvaluator for coref-family tasks.

pub fn is_available(backend_name: &str) -> bool

Check if a backend is available (feature-enabled).