[QUESTION] Q&A with RAG

[khang3052002]

Hi everyone, I have some questions about the langchain4j with RAG.
According to the Langchain Python example as follows
`from langchain_core.prompts import PromptTemplate

template = """Use the following pieces of context to answer the question at the end.
If you don't know the answer, just say that you don't know, don't try to make up an answer.
Use three sentences maximum and keep the answer as concise as possible.
Always say "thanks for asking!" at the end of the answer.

{context}

Question: {question}

Helpful Answer:"""
custom_rag_prompt = PromptTemplate.from_template(template)

rag_chain = (
{"context": retriever | format_docs, "question": RunnablePassthrough()}
| custom_rag_prompt
| llm
| StrOutputParser()
)

rag_chain.invoke("What is Task Decomposition?")`

So in Langchain4j. how i can implement this? I don't know to how to pass {{context}} like Python example.

Thank you everyone.

[langchain4j]

Please check this: https://github.com/langchain4j/langchain4j-examples/blob/5efd4367d6c658ffaa45d7600202a98a73ad1fad/other-examples/src/main/java/ChatWithDocumentsExamples.java#L67

RAG documentation: https://docs.langchain4j.dev/tutorials/rag