public String promptOnImage()

in sessions/next24/books-genai-vertex-langchain4j/src/main/java/services/ai/VertexAIClient.java [52:82]

• 21 lines of code
• 1 McCabe index (conditional complexity)

    public String promptOnImage(String prompt,
                                String bucketName,
                                String fileName) throws IOException {
        long start = System.currentTimeMillis();

        // bucket where image has been uploaded
        String imageURL = String.format("gs://%s/%s",bucketName, fileName);

        UserMessage userMessage = UserMessage.from(
            ImageContent.from(imageURL),
            TextContent.from(prompt)
        );

        ChatLanguageModel visionModel = VertexAiGeminiChatModel.builder()
            .project(project)
            .location(location)
            .modelName(VertexModels.GEMINI_FLASH_VISION_VERSION)
            .build();

        Response<AiMessage> multiModalResponse = visionModel.generate(userMessage);
        String response = multiModalResponse.content().text();
        logger.info("Multi-modal response: " + response);

        // response from Vertex is in Markdown, remove annotations
        response = response.replaceAll("```json", "").replaceAll("```", "").replace("'", "\"");

        logger.info("Elapsed time (gemini-pro-vision, with Langchain4J): " + (System.currentTimeMillis() - start) + "ms");

        // return the response in String format, extract values in caller
        return response;
    }