Dev

README.md

@@ -312,6 +312,30 @@ You can also query with:
 - **Sparse only**: Provide only `sparseIndices` and `sparseValues`
 - **Hybrid**: Provide all three for combined results
 
+## Updating Filters
+
+Use `index.updateFilters()` to update the filter fields of existing vectors without re-upserting them.
+
+```java
+import io.endee.client.types.UpdateFilterParams;
+import java.util.List;
+import java.util.Map;
+
+index.updateFilters(List.of(
+    new UpdateFilterParams("vec1", Map.of("category", "ml", "score", 95)),
+    new UpdateFilterParams("vec2", Map.of("category", "science", "score", 80))
+));
+```
+
+**`UpdateFilterParams` Fields:**
+
+| Field    | Required | Description                                        |
+| -------- | -------- | -------------------------------------------------- |
+| `id`     | Yes      | ID of the vector to update                         |
+| `filter` | Yes      | New filter object to replace the existing filter   |
+
+> **Note:** The entire filter object is replaced, not merged.
+
 ## Deletion Methods
 
 ### Delete by ID
@@ -522,9 +546,10 @@ public class EndeeExample {
 
 | Method                        | Parameters | Return Type         | Description                |
 | ----------------------------- | ---------- | ------------------- | -------------------------- |
-| `upsert(List<VectorItem>)`    | `vectors`  | `String`            | Insert or update vectors   |
-| `query(QueryOptions)`         | `options`  | `List<QueryResult>` | Search for similar vectors |
-| `deleteVector(String id)`     | `id`       | `String`            | Delete a vector by ID      |
+| `upsert(List<VectorItem>)`              | `vectors`  | `String`            | Insert or update vectors              |
+| `query(QueryOptions)`                   | `options`  | `List<QueryResult>` | Search for similar vectors            |
+| `updateFilters(List<UpdateFilterParams>)` | `updates`  | `String`            | Update filter fields on existing vectors |
+| `deleteVector(String id)`               | `id`       | `String`            | Delete a vector by ID                 |
 | `deleteWithFilter(List<Map>)` | `filter`   | `String`            | Delete vectors by filter   |
 | `getVector(String id)`        | `id`       | `VectorInfo`        | Get a vector by ID         |
 | `describe()`                  | -          | `IndexDescription`  | Get index metadata         |

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>io.endee</groupId>
     <artifactId>endee-java-client</artifactId>
-    <version>0.1.6-SNAPSHOT</version>
+    <version>1.0.0-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>Endee Java Client</name>

src/main/java/io/endee/client/Index.java

@@ -341,6 +341,43 @@ public List<QueryResult> query(QueryOptions options) {
     }
   }
 
+  /**
+   * Updates the filter fields of existing vectors without re-upserting them.
+   *
+   * @param updates list of filter updates, each containing an id and the new filter object
+   * @return success message
+   */
+  public String updateFilters(List<UpdateFilterParams> updates) {
+    List<String> ids = updates.stream().map(UpdateFilterParams::getId).collect(Collectors.toList());
+    ValidationUtils.validateVectorIds(ids);
+
+    List<Map<String, Object>> payload = new ArrayList<>();
+    for (UpdateFilterParams update : updates) {
+      Map<String, Object> entry = new HashMap<>();
+      entry.put("id", update.getId());
+      entry.put("filter", update.getFilter() != null ? update.getFilter() : Map.of());
+      payload.add(entry);
+    }
+
+    try {
+      String jsonBody = JsonUtils.toJson(Map.of("updates", payload));
+      HttpRequest request = buildPostJsonRequest("/index/" + name + "/filters/update", jsonBody);
+      HttpResponse<String> response =
+          httpClient.send(request, HttpResponse.BodyHandlers.ofString());
+
+      if (response.statusCode() != 200) {
+        EndeeApiException.raiseException(response.statusCode(), response.body());
+      }
+
+      return response.body();
+    } catch (IOException | InterruptedException e) {
+      if (e instanceof InterruptedException) {
+        Thread.currentThread().interrupt();
+      }
+      throw new EndeeException("Failed to update filters", e);
+    }
+  }
+
   /**
    * Deletes a vector by ID.
    *

src/main/java/io/endee/client/types/UpdateFilterParams.java

@@ -0,0 +1,22 @@
+package io.endee.client.types;
+
+import java.util.Map;
+
+/** Parameters for updating the filter fields of an existing vector. */
+public class UpdateFilterParams {
+  private final String id;
+  private final Map<String, Object> filter;
+
+  public UpdateFilterParams(String id, Map<String, Object> filter) {
+    this.id = id;
+    this.filter = filter;
+  }
+
+  public String getId() {
+    return id;
+  }
+
+  public Map<String, Object> getFilter() {
+    return filter;
+  }
+}