refs #735: add few-shot NL2SQL MCP tool

src/main/java/com/cloudhandson/vpdbackoffice/service/McpSseService.java

@@ -73,7 +73,8 @@ public class McpSseService {
   /** Tools registered by this MCP server. */
   public List<McpToolView> registeredTools() {
     return List.of(
-        selectAiQueryView(), selectAiShowpromptView(), qaVectorSearchView(), qaVectorStoreView());
+        selectAiQueryView(), selectAiShowpromptView(), qaVectorSearchView(),
+        qaVectorStoreView(), fewShotNl2SqlView());
   }
 
   private ObjectNode initializeResult(String contextPath) {
@@ -96,6 +97,7 @@ public class McpSseService {
     tools.add(toolDefinition(selectAiShowpromptView()));
     tools.add(toolDefinition(qaVectorSearchView()));
     tools.add(toolDefinition(qaVectorStoreView()));
+    tools.add(toolDefinition(fewShotNl2SqlView()));
     result.set("tools", tools);
     return result;
   }
@@ -149,7 +151,8 @@ public class McpSseService {
     boolean showpromptTool = showpromptToolName().equals(calledToolName);
     boolean qaVectorSearchTool = qaVectorSearchToolName().equals(calledToolName);
     boolean qaVectorStoreTool = qaVectorStoreToolName().equals(calledToolName);
-    if (!queryTool && !showpromptTool && !qaVectorSearchTool && !qaVectorStoreTool) {
+    boolean fewShotNl2SqlTool = fewShotNl2SqlToolName().equals(calledToolName);
+    if (!queryTool && !showpromptTool && !qaVectorSearchTool && !qaVectorStoreTool && !fewShotNl2SqlTool) {
       throw new AppException("등록되지 않은 MCP tool입니다: " + calledToolName);
     }
 
@@ -172,7 +175,7 @@ public class McpSseService {
         ));
       } else {
         String prompt = arguments.path("prompt").asText("");
-        response = queryTool
+        response = queryTool || fewShotNl2SqlTool
             ? selectAiService.generateAndExecute(token, prompt)
             : selectAiService.generatePrompt(token, prompt);
       }
@@ -278,6 +281,12 @@ public class McpSseService {
         qaVectorStoreToolLabel(), SELECT_AI_TOOL_PATH);
   }
 
+  private McpToolView fewShotNl2SqlView() {
+    return new McpToolView(
+        fewShotNl2SqlToolName(), fewShotNl2SqlToolDescription(), -1L,
+        fewShotNl2SqlToolLabel(), SELECT_AI_TOOL_PATH);
+  }
+
   private String selectAiProfile() {
     BackofficeProperties.SelectAi selectAi = properties == null ? null : properties.selectAi();
     if (selectAi == null || selectAi.profile() == null || selectAi.profile().isBlank()) {
@@ -354,6 +363,22 @@ public class McpSseService {
         : mcpProperties.resolvedQaVectorStoreToolDescription();
   }
 
+  private String fewShotNl2SqlToolName() {
+    return mcpProperties == null ? "oracle.select_ai.smilegate_fewshot_nl2sql"
+        : mcpProperties.resolvedFewShotNl2SqlToolName();
+  }
+
+  private String fewShotNl2SqlToolLabel() {
+    return mcpProperties == null ? "Few-shot NL2SQL 실행"
+        : mcpProperties.resolvedFewShotNl2SqlToolLabel();
+  }
+
+  private String fewShotNl2SqlToolDescription() {
+    return mcpProperties == null
+        ? "벡터 Few-shot 예제를 찾아 prompt에 반영하고 SHOWSQL로 생성한 읽기 전용 SQL을 실행합니다. Few-shot 근거, 생성 SQL, 실행 결과를 함께 반환합니다."
+        : mcpProperties.resolvedFewShotNl2SqlToolDescription();
+  }
+
   private String pretty(Object value) {
     try {
       return objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(value);