Create app.py

app.py

@@ -0,0 +1,231 @@
+import os
+
+import gradio as gr
+from huggingface_hub import hf_hub_download
+from llama_cpp import Llama
+
+
+MODEL_REPO = "TaruniSwathi/Qwen2.5-Coder-1.5B-Java-CSharp-GGUF"
+MODEL_FILE = "Qwen2.5-Coder-1.5B-Java-CSharp_V2.Q4_K_M.gguf"
+
+
+print("Downloading GGUF model...")
+
+model_path = hf_hub_download(
+    repo_id=MODEL_REPO,
+    filename=MODEL_FILE,
+)
+
+print("Model downloaded:", model_path)
+print("Loading model with llama.cpp...")
+
+
+llm = Llama(
+    model_path=model_path,
+    n_ctx=2048,
+    n_threads=max(1, os.cpu_count() or 2),
+    n_batch=128,
+    n_gpu_layers=0,
+    verbose=False,
+)
+
+print("Model loaded successfully.")
+
+
+def build_prompt(task: str, user_input: str) -> str:
+    user_input = user_input.strip()
+
+    if task == "Natural Language → Java":
+        return f"""### Instruction:
+{user_input}
+
+### Java Code:
+"""
+
+    return f"""### Instruction:
+Translate the following Java code to C#.
+
+### Java Code:
+{user_input}
+
+### C# Code:
+"""
+
+
+def clean_output(task: str, generated_text: str) -> str:
+    generated_text = generated_text.strip()
+
+    stop_markers = [
+        "### Instruction:",
+        "### Java Code:",
+        "### C# Code:",
+    ]
+
+    for marker in stop_markers:
+        if marker in generated_text:
+            generated_text = generated_text.split(marker)[0].strip()
+
+    if task == "Natural Language → Java":
+        language = "java"
+    else:
+        language = "csharp"
+
+    return f"```{language}\n{generated_text}\n```"
+
+
+def generate_code(
+    task: str,
+    user_input: str,
+    max_tokens: int,
+) -> str:
+    if not user_input or not user_input.strip():
+        return "Please enter a description or Java code."
+
+    prompt = build_prompt(task, user_input)
+
+    try:
+        response = llm(
+            prompt,
+            max_tokens=int(max_tokens),
+            temperature=0.0,
+            top_p=1.0,
+            repeat_penalty=1.05,
+            stop=[
+                "### Instruction:",
+                "### Java Code:",
+                "### C# Code:",
+            ],
+            echo=False,
+        )
+
+        generated_text = response["choices"][0]["text"]
+
+        if not generated_text.strip():
+            return "The model returned an empty response. Please try a more detailed input."
+
+        return clean_output(task, generated_text)
+
+    except Exception as error:
+        return f"Generation failed: {error}"
+
+
+def update_placeholder(task: str):
+    if task == "Natural Language → Java":
+        return gr.update(
+            label="Natural-language requirement",
+            placeholder=(
+                "Example: Write a Java method to check whether "
+                "a number is prime."
+            ),
+            value="",
+        )
+
+    return gr.update(
+        label="Java code",
+        placeholder=(
+            "Example:\n"
+            "public static int factorial(int n) {\n"
+            "    int result = 1;\n"
+            "    for (int i = 2; i <= n; i++) result *= i;\n"
+            "    return result;\n"
+            "}"
+        ),
+        value="",
+    )
+
+
+with gr.Blocks(title="Java and C# CodeGen") as demo:
+    gr.Markdown(
+        """
+        # Java and C# CodeGen
+
+        Generate Java code from natural-language requirements or translate
+        Java code into C# using a fine-tuned Qwen2.5-Coder model.
+        """
+    )
+
+    task = gr.Dropdown(
+        choices=[
+            "Natural Language → Java",
+            "Java → C#",
+        ],
+        value="Natural Language → Java",
+        label="Select task",
+    )
+
+    user_input = gr.Textbox(
+        label="Natural-language requirement",
+        placeholder=(
+            "Example: Write a Java method to check whether "
+            "a number is prime."
+        ),
+        lines=12,
+    )
+
+    max_tokens = gr.Slider(
+        minimum=64,
+        maximum=512,
+        value=256,
+        step=32,
+        label="Maximum generated tokens",
+    )
+
+    generate_button = gr.Button(
+        "Generate Code",
+        variant="primary",
+    )
+
+    output = gr.Markdown(
+        label="Generated code",
+    )
+
+    task.change(
+        fn=update_placeholder,
+        inputs=task,
+        outputs=user_input,
+    )
+
+    generate_button.click(
+        fn=generate_code,
+        inputs=[
+            task,
+            user_input,
+            max_tokens,
+        ],
+        outputs=output,
+    )
+
+    gr.Examples(
+        examples=[
+            [
+                "Natural Language → Java",
+                "Write a Java method to calculate factorial of a number using a loop.",
+                256,
+            ],
+            [
+                "Natural Language → Java",
+                "Write a Java method to reverse a string.",
+                256,
+            ],
+            [
+                "Java → C#",
+                """public static int factorial(int n) {
+    int result = 1;
+    for (int i = 2; i <= n; i++) {
+        result *= i;
+    }
+    return result;
+}""",
+                256,
+            ],
+        ],
+        inputs=[
+            task,
+            user_input,
+            max_tokens,
+        ],
+    )
+
+
+if __name__ == "__main__":
+    demo.queue(max_size=10).launch()