Add missing support for Flax XLM-RoBERTa (#15900)

* Adding Flax XLM-RoBERTa

* Add Flax to __init__

* Adding doc and dummy objects

* Add tests

* Add Flax XLM-R models autodoc

* Fix tests

* Add Flask XLM-RoBERTa to TEST_FILES_WITH_NO_COMMON_TESTS

* Update src/transformers/models/xlm_roberta/modeling_flax_xlm_roberta.py

Co-authored-by: Suraj Patil <surajp815@gmail.com>

* Update tests/xlm_roberta/test_modeling_flax_xlm_roberta.py

Co-authored-by: Suraj Patil <surajp815@gmail.com>

* Update tests/xlm_roberta/test_modeling_flax_xlm_roberta.py

Co-authored-by: Suraj Patil <surajp815@gmail.com>

* Remove test on large Flask XLM-RoBERTa

* Add tokenizer to the test

Co-authored-by: Suraj Patil <surajp815@gmail.com>

docs/source/index.mdx

@@ -257,7 +257,7 @@ Flax), PyTorch, and/or TensorFlow.
 |            WavLM            |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |
 |            XGLM             |       ✅       |       ✅       |       ✅        |         ❌         |      ✅      |
 |             XLM             |       ✅       |       ❌       |       ✅        |         ✅         |      ❌      |
-|         XLM-RoBERTa         |       ✅       |       ✅       |       ✅        |         ✅         |      ❌      |
+|         XLM-RoBERTa         |       ✅       |       ✅       |       ✅        |         ✅         |      ✅      |
 |       XLM-RoBERTa-XL        |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |
 |        XLMProphetNet        |       ✅       |       ❌       |       ✅        |         ❌         |      ❌      |
 |            XLNet            |       ✅       |       ✅       |       ✅        |         ✅         |      ❌      |

docs/source/model_doc/xlm-roberta.mdx

@@ -124,3 +124,33 @@ This model was contributed by [stefan-it](https://huggingface.co/stefan-it). The
 
 [[autodoc]] TFXLMRobertaForQuestionAnswering
     - call
+
+## FlaxXLMRobertaModel
+
+[[autodoc]] FlaxXLMRobertaModel
+    - __call__
+
+## FlaxXLMRobertaForMaskedLM
+
+[[autodoc]] FlaxXLMRobertaForMaskedLM
+    - __call__
+
+## FlaxXLMRobertaForSequenceClassification
+
+[[autodoc]] FlaxXLMRobertaForSequenceClassification
+    - __call__
+
+## FlaxXLMRobertaForMultipleChoice
+
+[[autodoc]] FlaxXLMRobertaForMultipleChoice
+    - __call__
+
+## FlaxXLMRobertaForTokenClassification
+
+[[autodoc]] FlaxXLMRobertaForTokenClassification
+    - __call__
+
+## FlaxXLMRobertaForQuestionAnswering
+
+[[autodoc]] FlaxXLMRobertaForQuestionAnswering
+    - __call__

src/transformers/__init__.py

@@ -2348,6 +2348,16 @@ if is_flax_available():
             "FlaxXGLMPreTrainedModel",
         ]
     )
+    _import_structure["models.xlm_roberta"].extend(
+        [
+            "FlaxXLMRobertaForMaskedLM",
+            "FlaxXLMRobertaForMultipleChoice",
+            "FlaxXLMRobertaForQuestionAnswering",
+            "FlaxXLMRobertaForSequenceClassification",
+            "FlaxXLMRobertaForTokenClassification",
+            "FlaxXLMRobertaModel",
+        ]
+    )
 else:
     from .utils import dummy_flax_objects
 
@@ -4268,6 +4278,14 @@ if TYPE_CHECKING:
             FlaxWav2Vec2PreTrainedModel,
         )
         from .models.xglm import FlaxXGLMForCausalLM, FlaxXGLMModel, FlaxXGLMPreTrainedModel
+        from .models.xlm_roberta import (
+            FlaxXLMRobertaForMaskedLM,
+            FlaxXLMRobertaForMultipleChoice,
+            FlaxXLMRobertaForQuestionAnswering,
+            FlaxXLMRobertaForSequenceClassification,
+            FlaxXLMRobertaForTokenClassification,
+            FlaxXLMRobertaModel,
+        )
     else:
         # Import the same objects as dummies to get them in the namespace.
         # They will raise an import error if the user tries to instantiate / use them.

src/transformers/models/auto/modeling_flax_auto.py

@@ -35,6 +35,7 @@ FLAX_MODEL_MAPPING_NAMES = OrderedDict(
         ("distilbert", "FlaxDistilBertModel"),
         ("albert", "FlaxAlbertModel"),
         ("roberta", "FlaxRobertaModel"),
+        ("xlm-roberta", "FlaxXLMRobertaModel"),
         ("bert", "FlaxBertModel"),
         ("beit", "FlaxBeitModel"),
         ("big_bird", "FlaxBigBirdModel"),
@@ -60,6 +61,7 @@ FLAX_MODEL_FOR_PRETRAINING_MAPPING_NAMES = OrderedDict(
         # Model for pre-training mapping
         ("albert", "FlaxAlbertForPreTraining"),
         ("roberta", "FlaxRobertaForMaskedLM"),
+        ("xlm-roberta", "FlaxXLMRobertaForMaskedLM"),
         ("bert", "FlaxBertForPreTraining"),
         ("big_bird", "FlaxBigBirdForPreTraining"),
         ("bart", "FlaxBartForConditionalGeneration"),
@@ -78,6 +80,7 @@ FLAX_MODEL_FOR_MASKED_LM_MAPPING_NAMES = OrderedDict(
         ("distilbert", "FlaxDistilBertForMaskedLM"),
         ("albert", "FlaxAlbertForMaskedLM"),
         ("roberta", "FlaxRobertaForMaskedLM"),
+        ("xlm-roberta", "FlaxXLMRobertaForMaskedLM"),
         ("bert", "FlaxBertForMaskedLM"),
         ("big_bird", "FlaxBigBirdForMaskedLM"),
         ("bart", "FlaxBartForConditionalGeneration"),
@@ -132,6 +135,7 @@ FLAX_MODEL_FOR_SEQUENCE_CLASSIFICATION_MAPPING_NAMES = OrderedDict(
         ("distilbert", "FlaxDistilBertForSequenceClassification"),
         ("albert", "FlaxAlbertForSequenceClassification"),
         ("roberta", "FlaxRobertaForSequenceClassification"),
+        ("xlm-roberta", "FlaxXLMRobertaForSequenceClassification"),
         ("bert", "FlaxBertForSequenceClassification"),
         ("big_bird", "FlaxBigBirdForSequenceClassification"),
         ("bart", "FlaxBartForSequenceClassification"),
@@ -147,6 +151,7 @@ FLAX_MODEL_FOR_QUESTION_ANSWERING_MAPPING_NAMES = OrderedDict(
         ("distilbert", "FlaxDistilBertForQuestionAnswering"),
         ("albert", "FlaxAlbertForQuestionAnswering"),
         ("roberta", "FlaxRobertaForQuestionAnswering"),
+        ("xlm-roberta", "FlaxXLMRobertaForQuestionAnswering"),
         ("bert", "FlaxBertForQuestionAnswering"),
         ("big_bird", "FlaxBigBirdForQuestionAnswering"),
         ("bart", "FlaxBartForQuestionAnswering"),
@@ -162,6 +167,7 @@ FLAX_MODEL_FOR_TOKEN_CLASSIFICATION_MAPPING_NAMES = OrderedDict(
         ("distilbert", "FlaxDistilBertForTokenClassification"),
         ("albert", "FlaxAlbertForTokenClassification"),
         ("roberta", "FlaxRobertaForTokenClassification"),
+        ("xlm-roberta", "FlaxXLMRobertaForTokenClassification"),
         ("bert", "FlaxBertForTokenClassification"),
         ("big_bird", "FlaxBigBirdForTokenClassification"),
         ("electra", "FlaxElectraForTokenClassification"),
@@ -175,6 +181,7 @@ FLAX_MODEL_FOR_MULTIPLE_CHOICE_MAPPING_NAMES = OrderedDict(
         ("distilbert", "FlaxDistilBertForMultipleChoice"),
         ("albert", "FlaxAlbertForMultipleChoice"),
         ("roberta", "FlaxRobertaForMultipleChoice"),
+        ("xlm-roberta", "FlaxXLMRobertaForMultipleChoice"),
         ("bert", "FlaxBertForMultipleChoice"),
         ("big_bird", "FlaxBigBirdForMultipleChoice"),
         ("electra", "FlaxElectraForMultipleChoice"),

src/transformers/models/xlm_roberta/__init__.py

@@ -20,6 +20,7 @@ from typing import TYPE_CHECKING
 
 from ...file_utils import (
     _LazyModule,
+    is_flax_available,
     is_sentencepiece_available,
     is_tf_available,
     is_tokenizers_available,
@@ -64,6 +65,15 @@ if is_tf_available():
         "TFXLMRobertaModel",
     ]
 
+if is_flax_available():
+    _import_structure["modeling_flax_xlm_roberta"] = [
+        "FlaxXLMRobertaForMaskedLM",
+        "FlaxXLMRobertaForMultipleChoice",
+        "FlaxXLMRobertaForQuestionAnswering",
+        "FlaxXLMRobertaForSequenceClassification",
+        "FlaxXLMRobertaForTokenClassification",
+        "FlaxXLMRobertaModel",
+    ]
 
 if TYPE_CHECKING:
     from .configuration_xlm_roberta import (
@@ -101,6 +111,16 @@ if TYPE_CHECKING:
             TFXLMRobertaModel,
         )
 
+    if is_flax_available():
+        from .modeling_flax_xlm_roberta import (
+            FlaxXLMRobertaForMaskedLM,
+            FlaxXLMRobertaForMultipleChoice,
+            FlaxXLMRobertaForQuestionAnswering,
+            FlaxXLMRobertaForSequenceClassification,
+            FlaxXLMRobertaForTokenClassification,
+            FlaxXLMRobertaModel,
+        )
+
 else:
     import sys
 

src/transformers/models/xlm_roberta/modeling_flax_xlm_roberta.py

@@ -0,0 +1,152 @@
+# coding=utf-8
+# Copyright 2022 Facebook AI Research and the HuggingFace Inc. team.
+# Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Flax XLM-RoBERTa model."""
+
+from ...file_utils import add_start_docstrings
+from ...utils import logging
+from ..roberta.modeling_flax_roberta import (
+    FlaxRobertaForMaskedLM,
+    FlaxRobertaForMultipleChoice,
+    FlaxRobertaForQuestionAnswering,
+    FlaxRobertaForSequenceClassification,
+    FlaxRobertaForTokenClassification,
+    FlaxRobertaModel,
+)
+from .configuration_xlm_roberta import XLMRobertaConfig
+
+
+logger = logging.get_logger(__name__)
+
+XLM_ROBERTA_PRETRAINED_MODEL_ARCHIVE_LIST = [
+    "xlm-roberta-base",
+    "xlm-roberta-large",
+    "xlm-roberta-large-finetuned-conll02-dutch",
+    "xlm-roberta-large-finetuned-conll02-spanish",
+    "xlm-roberta-large-finetuned-conll03-english",
+    "xlm-roberta-large-finetuned-conll03-german",
+    # See all XLM-RoBERTa models at https://huggingface.co/models?filter=xlm-roberta
+]
+
+XLM_ROBERTA_START_DOCSTRING = r"""
+    This model inherits from [`FlaxPreTrainedModel`]. Check the superclass documentation for the generic methods the
+    library implements for all its model (such as downloading, saving and converting weights from PyTorch models)
+
+    This model is also a Flax Linen [flax.linen.Module](https://flax.readthedocs.io/en/latest/flax.linen.html#module)
+    subclass. Use it as a regular Flax linen Module and refer to the Flax documentation for all matter related to
+    general usage and behavior.
+
+    Finally, this model supports inherent JAX features such as:
+
+    - [Just-In-Time (JIT) compilation](https://jax.readthedocs.io/en/latest/jax.html#just-in-time-compilation-jit)
+    - [Automatic Differentiation](https://jax.readthedocs.io/en/latest/jax.html#automatic-differentiation)
+    - [Vectorization](https://jax.readthedocs.io/en/latest/jax.html#vectorization-vmap)
+    - [Parallelization](https://jax.readthedocs.io/en/latest/jax.html#parallelization-pmap)
+
+    Parameters:
+        config ([`XLMRobertaConfig`]): Model configuration class with all the parameters of the
+            model. Initializing with a config file does not load the weights associated with the model, only the
+            configuration. Check out the [`~FlaxPreTrainedModel.from_pretrained`] method to load the model weights.
+"""
+
+
+@add_start_docstrings(
+    "The bare XLM-RoBERTa Model transformer outputting raw hidden-states without any specific head on top.",
+    XLM_ROBERTA_START_DOCSTRING,
+)
+class FlaxXLMRobertaModel(FlaxRobertaModel):
+    """
+    This class overrides [`FlaxRobertaModel`]. Please check the superclass for the appropriate documentation alongside
+    usage examples.
+    """
+
+    config_class = XLMRobertaConfig
+
+
+@add_start_docstrings(
+    """XLM-RoBERTa Model with a `language modeling` head on top.""",
+    XLM_ROBERTA_START_DOCSTRING,
+)
+class FlaxXLMRobertaForMaskedLM(FlaxRobertaForMaskedLM):
+    """
+    This class overrides [`FlaxRobertaForMaskedLM`]. Please check the superclass for the appropriate documentation
+    alongside usage examples.
+    """
+
+    config_class = XLMRobertaConfig
+
+
+@add_start_docstrings(
+    """
+    XLM-RoBERTa Model transformer with a sequence classification/regression head on top (a linear layer on top of the
+    pooled output) e.g. for GLUE tasks.
+    """,
+    XLM_ROBERTA_START_DOCSTRING,
+)
+class FlaxXLMRobertaForSequenceClassification(FlaxRobertaForSequenceClassification):
+    """
+    This class overrides [`FlaxRobertaForSequenceClassification`]. Please check the superclass for the appropriate
+    documentation alongside usage examples.
+    """
+
+    config_class = XLMRobertaConfig
+
+
+@add_start_docstrings(
+    """
+    XLM-RoBERTa Model with a multiple choice classification head on top (a linear layer on top of the pooled output and
+    a softmax) e.g. for RocStories/SWAG tasks.
+    """,
+    XLM_ROBERTA_START_DOCSTRING,
+)
+class FlaxXLMRobertaForMultipleChoice(FlaxRobertaForMultipleChoice):
+    """
+    This class overrides [`FlaxRobertaForMultipleChoice`]. Please check the superclass for the appropriate
+    documentation alongside usage examples.
+    """
+
+    config_class = XLMRobertaConfig
+
+
+@add_start_docstrings(
+    """
+    XLM-RoBERTa Model with a token classification head on top (a linear layer on top of the hidden-states output) e.g.
+    for Named-Entity-Recognition (NER) tasks.
+    """,
+    XLM_ROBERTA_START_DOCSTRING,
+)
+class FlaxXLMRobertaForTokenClassification(FlaxRobertaForTokenClassification):
+    """
+    This class overrides [`FlaxRobertaForTokenClassification`]. Please check the superclass for the appropriate
+    documentation alongside usage examples.
+    """
+
+    config_class = XLMRobertaConfig
+
+
+@add_start_docstrings(
+    """
+    XLM-RoBERTa Model with a span classification head on top for extractive question-answering tasks like SQuAD (a
+    linear layers on top of the hidden-states output to compute `span start logits` and `span end logits`).
+    """,
+    XLM_ROBERTA_START_DOCSTRING,
+)
+class FlaxXLMRobertaForQuestionAnswering(FlaxRobertaForQuestionAnswering):
+    """
+    This class overrides [`FlaxRobertaForQuestionAnswering`]. Please check the superclass for the appropriate
+    documentation alongside usage examples.
+    """
+
+    config_class = XLMRobertaConfig

src/transformers/utils/dummy_flax_objects.py

@@ -989,3 +989,45 @@ class FlaxXGLMPreTrainedModel(metaclass=DummyObject):
 
     def __init__(self, *args, **kwargs):
         requires_backends(self, ["flax"])
+
+
+class FlaxXLMRobertaForMaskedLM(metaclass=DummyObject):
+    _backends = ["flax"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["flax"])
+
+
+class FlaxXLMRobertaForMultipleChoice(metaclass=DummyObject):
+    _backends = ["flax"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["flax"])
+
+
+class FlaxXLMRobertaForQuestionAnswering(metaclass=DummyObject):
+    _backends = ["flax"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["flax"])
+
+
+class FlaxXLMRobertaForSequenceClassification(metaclass=DummyObject):
+    _backends = ["flax"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["flax"])
+
+
+class FlaxXLMRobertaForTokenClassification(metaclass=DummyObject):
+    _backends = ["flax"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["flax"])
+
+
+class FlaxXLMRobertaModel(metaclass=DummyObject):
+    _backends = ["flax"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["flax"])

tests/xlm_roberta/test_modeling_flax_xlm_roberta.py

@@ -0,0 +1,47 @@
+# coding=utf-8
+# Copyright 2022 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+import unittest
+
+from transformers import AutoTokenizer, is_flax_available
+from transformers.testing_utils import require_flax, require_sentencepiece, require_tokenizers, slow
+
+
+if is_flax_available():
+    import jax.numpy as jnp
+    from transformers import FlaxXLMRobertaModel
+
+
+@require_sentencepiece
+@require_tokenizers
+@require_flax
+class FlaxXLMRobertaModelIntegrationTest(unittest.TestCase):
+    @slow
+    def test_flax_xlm_roberta_base(self):
+        model = FlaxXLMRobertaModel.from_pretrained("xlm-roberta-base")
+        tokenizer = AutoTokenizer.from_pretrained("xlm-roberta-base")
+        text = "The dog is cute and lives in the garden house"
+        input_ids = jnp.array([tokenizer.encode(text)])
+
+        expected_output_shape = (1, 12, 768)  # batch_size, sequence_length, embedding_vector_dim
+        expected_output_values_last_dim = jnp.array(
+            [[-0.0101, 0.1218, -0.0803, 0.0801, 0.1327, 0.0776, -0.1215, 0.2383, 0.3338, 0.3106, 0.0300, 0.0252]]
+        )
+
+        output = model(input_ids)["last_hidden_state"]
+        self.assertEqual(output.shape, expected_output_shape)
+        # compare the actual values for a slice of last dim
+        self.assertTrue(jnp.allclose(output[:, :, -1], expected_output_values_last_dim, atol=1e-3))

utils/check_repo.py

@@ -102,6 +102,7 @@ TEST_FILES_WITH_NO_COMMON_TESTS = [
     "camembert/test_modeling_tf_camembert.py",
     "mt5/test_modeling_tf_mt5.py",
     "xlm_roberta/test_modeling_tf_xlm_roberta.py",
+    "xlm_roberta/test_modeling_flax_xlm_roberta.py",
     "xlm_prophetnet/test_modeling_xlm_prophetnet.py",
     "xlm_roberta/test_modeling_xlm_roberta.py",
     "vision_text_dual_encoder/test_modeling_vision_text_dual_encoder.py",