# Copyright (c) "Neo4j"
# Neo4j Sweden AB [https://neo4j.com]
# #
# 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
# #
# https://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.
from __future__ import annotations
from langchain_text_splitters import TextSplitter as LangChainTextSplitter
from neo4j_genai.experimental.components.text_splitters.base import TextSplitter
from neo4j_genai.experimental.components.types import TextChunk, TextChunks
[docs]
class LangChainTextSplitterAdapter(TextSplitter):
"""Adapter for LangChain TextSplitters.
Allows instances of this class to be used in the knowledge graph builder pipeline.
Args:
text_splitter (LangChainTextSplitter): An instance of LangChain's TextSplitter class.
Example:
.. code-block:: python
from langchain_text_splitters import RecursiveCharacterTextSplitter
from neo4j_genai.experimental.components.text_splitters.langchain import LangChainTextSplitterAdapter
from neo4j_genai.experimental.pipeline import Pipeline
pipeline = Pipeline()
text_splitter = LangChainTextSplitterAdapter(RecursiveCharacterTextSplitter())
pipeline.add_component(text_splitter, "text_splitter")
"""
def __init__(self, text_splitter: LangChainTextSplitter) -> None:
self.text_splitter = text_splitter
[docs]
async def run(self, text: str) -> TextChunks:
"""
Splits text into chunks.
Args:
text (str): The text to split.
Returns:
TextChunks: The text split into chunks.
"""
chunks = self.text_splitter.split_text(text)
return TextChunks(
chunks=[
TextChunk(text=chunk, index=index) for index, chunk in enumerate(chunks)
]
)