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0a423df | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | """Native GLiNER2 classification path with explicit marker routing."""
import torch
from torch import nn
from transformers.models.deberta_v2 import modeling_deberta_v2
def coreml_safe_attention_forward(
self, hidden_states, attention_mask, output_attentions=False,
query_states=None, relative_pos=None, rel_embeddings=None,
):
"""Native DeBERTa attention with a finite mask sentinel for FP16 Core ML."""
if query_states is None:
query_states = hidden_states
query = self.transpose_for_scores(self.query_proj(query_states), self.num_attention_heads)
key = self.transpose_for_scores(self.key_proj(hidden_states), self.num_attention_heads)
value = self.transpose_for_scores(self.value_proj(hidden_states), self.num_attention_heads)
factor = 1 + int("c2p" in self.pos_att_type) + int("p2c" in self.pos_att_type)
scale = modeling_deberta_v2.scaled_size_sqrt(query, factor)
scores = torch.bmm(query, key.transpose(-1, -2) / scale.to(dtype=query.dtype))
if self.relative_attention:
relative = self.disentangled_attention_bias(
query, key, relative_pos, self.pos_dropout(rel_embeddings), factor
)
scores = scores + relative
scores = scores.view(-1, self.num_attention_heads, scores.size(-2), scores.size(-1))
scores = scores.masked_fill(~attention_mask.bool(), -1e4)
probabilities = self.dropout(torch.softmax(scores, dim=-1))
context = torch.bmm(probabilities.view(-1, probabilities.size(-2), probabilities.size(-1)), value)
context = context.view(-1, self.num_attention_heads, context.size(-2), context.size(-1))
context = context.permute(0, 2, 1, 3).contiguous()
context = context.view(context.size()[:-2] + (-1,))
return (context, probabilities) if output_attentions else (context, None)
class GLiNER2ClassificationExport(nn.Module):
def __init__(self, native: nn.Module):
super().__init__()
self.encoder = native.encoder
self.classifier = native.classifier
self.temperature = float(native.boundary_settings.classification_temperature)
def forward(self, input_ids, attention_mask, marker_indices, marker_mask):
hidden = self.encoder(input_ids=input_ids.long(), attention_mask=attention_mask.long()).last_hidden_state
indices = marker_indices.long().unsqueeze(-1).expand(-1, -1, hidden.shape[-1])
states = hidden.gather(1, indices)
logits = self.classifier(states).squeeze(-1) / self.temperature
logits = torch.where(marker_mask > 0.5, logits, torch.full_like(logits, -1e4))
return logits, torch.softmax(logits, dim=-1)
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