feat(core): Support higher-order operators (#1984)

Co-authored-by: 谨欣 <echo.cmy@antgroup.com>

dbgpt/util/pagination_utils.py

@@ -15,3 +15,29 @@ class PaginationResult(BaseModel, Generic[T]):
     total_pages: int = Field(..., description="total number of pages")
     page: int = Field(..., description="Current page number")
     page_size: int = Field(..., description="Number of items per page")
+
+    @classmethod
+    def build_from_all(
+        cls, all_items: List[T], page: int, page_size: int
+    ) -> "PaginationResult[T]":
+        """Build a pagination result from all items"""
+        if page < 1:
+            page = 1
+        if page_size < 1:
+            page_size = 1
+        total_count = len(all_items)
+        total_pages = (
+            (total_count + page_size - 1) // page_size if total_count > 0 else 0
+        )
+        page = max(1, min(page, total_pages)) if total_pages > 0 else 0
+        start_index = (page - 1) * page_size if page > 0 else 0
+        end_index = min(start_index + page_size, total_count)
+        items = all_items[start_index:end_index]
+
+        return cls(
+            items=items,
+            total_count=total_count,
+            total_pages=total_pages,
+            page=page,
+            page_size=page_size,
+        )