v6: Sort listed backups by starting time

src/it/java/io/weaviate/integration/BackupITest.java

@@ -103,10 +103,10 @@ public void test_lifecycle() throws IOException, TimeoutException {
         .returns(BackupStatus.CANCELED, Backup::status);
 
     // Assert: all 3 backups are present
-    var all = client.backup.list(backend);
+    var all = client.backup.list(backend, bu -> bu.sortByStartingTimeAsc(true));
     Assertions.assertThat(all).as("all backups")
         .extracting(Backup::id)
-        .contains(backup_1, backup_2, backup_3);
+        .containsExactly(backup_1, backup_2, backup_3);
 
     // Act: delete data and restore backup #1
     client.collections.delete(nsA);
@@ -225,8 +225,8 @@ public void test_lifecycle_async() throws ExecutionException, InterruptedExcepti
 
   @Test(expected = IllegalStateException.class)
   public void test_waitForCompletion_unknown() throws IOException, TimeoutException {
-    var backup = new Backup("#1", "/tmp/bak/#1", "filesystem", List.of("Things"), BackupStatus.STARTED, null,
-        null);
+    var backup = new Backup("#1", "/tmp/bak/#1", "filesystem", List.of("Things"), BackupStatus.STARTED,
+        null, null, null, null, null);
     backup.waitForCompletion(client);
   }
 

src/main/java/io/weaviate/client6/v1/api/backup/Backup.java

@@ -1,6 +1,7 @@
 package io.weaviate.client6.v1.api.backup;
 
 import java.io.IOException;
+import java.time.OffsetDateTime;
 import java.util.List;
 import java.util.Optional;
 import java.util.concurrent.Callable;
@@ -28,6 +29,12 @@ public record Backup(
     @SerializedName("status") BackupStatus status,
     /** Backup creation / restoration error. */
     @SerializedName("error") String error,
+    /** Time at which the backup creation. */
+    @SerializedName("startedAt") OffsetDateTime startedAt,
+    /** Time at which the backup was completed, successfully or otherwise. */
+    @SerializedName("completedAt") OffsetDateTime completedAt,
+    /** Backup size in GiB. */
+    @SerializedName("size") Integer sizeGiB,
     /**
      * This value indicates if a backup is being created or restored from.
      * For operations like LIST this value is null.
@@ -37,8 +44,18 @@ public record Backup(
     @SerializedName("__operation__") Operation operation) {
 
   /** Set operation associated with this backup. */
-  public Backup withOperation(Operation operation) {
-    return new Backup(id, path, backend, includesCollections, status, error, operation);
+  Backup withOperation(Operation operation) {
+    return new Backup(
+        id,
+        path,
+        backend,
+        includesCollections,
+        status,
+        error,
+        startedAt,
+        completedAt,
+        sizeGiB,
+        operation);
   }
 
   public enum Operation {

src/main/java/io/weaviate/client6/v1/api/backup/ListBackupsRequest.java

@@ -1,21 +1,61 @@
 package io.weaviate.client6.v1.api.backup;
 
-import java.util.Collections;
+import java.util.HashMap;
 import java.util.List;
+import java.util.function.Function;
 
 import com.google.gson.reflect.TypeToken;
 
+import io.weaviate.client6.v1.internal.ObjectBuilder;
 import io.weaviate.client6.v1.internal.json.JSON;
 import io.weaviate.client6.v1.internal.rest.Endpoint;
 import io.weaviate.client6.v1.internal.rest.SimpleEndpoint;
 
-public record ListBackupsRequest(String backend) {
+public record ListBackupsRequest(String backend, boolean startingTimeAsc) {
 
   @SuppressWarnings("unchecked")
   public static Endpoint<ListBackupsRequest, List<Backup>> _ENDPOINT = SimpleEndpoint.noBody(
       request -> "GET",
       request -> "/backups/" + request.backend,
-      request -> Collections.emptyMap(),
+      request -> new HashMap<>() {
+        {
+          if (request.startingTimeAsc) {
+            put("order", "asc");
+          }
+        }
+      },
       (statusCode, response) -> (List<Backup>) JSON.deserialize(
           response, TypeToken.getParameterized(List.class, Backup.class)));
+
+  public static ListBackupsRequest of(String backend) {
+    return of(backend, ObjectBuilder.identity());
+  }
+
+  public static ListBackupsRequest of(String backend, Function<Builder, ObjectBuilder<ListBackupsRequest>> fn) {
+    return fn.apply(new Builder(backend)).build();
+  }
+
+  public ListBackupsRequest(Builder builder) {
+    this(builder.backend, builder.startingTimeAsc);
+  }
+
+  public static class Builder implements ObjectBuilder<ListBackupsRequest> {
+    private final String backend;
+    private boolean startingTimeAsc = false;
+
+    public Builder(String backend) {
+      this.backend = backend;
+    }
+
+    /** Sort the backups by their starting time, oldest to newest. */
+    public Builder sortByStartingTimeAsc(boolean enable) {
+      this.startingTimeAsc = enable;
+      return this;
+    }
+
+    @Override
+    public ListBackupsRequest build() {
+      return new ListBackupsRequest(this);
+    }
+  }
 }

src/main/java/io/weaviate/client6/v1/api/backup/WeaviateBackupClient.java

@@ -157,7 +157,23 @@ public Optional<Backup> getRestoreStatus(String backupId, String backend) throws
    *                              or the server being unavailable.
    */
   public List<Backup> list(String backend) throws IOException {
-    return this.restTransport.performRequest(new ListBackupsRequest(backend), ListBackupsRequest._ENDPOINT);
+    return this.restTransport.performRequest(ListBackupsRequest.of(backend), ListBackupsRequest._ENDPOINT);
+  }
+
+  /**
+   * List backups in the backend storage.
+   *
+   * @param backend Backup storage backend.
+   * @param fn      Lambda expression for optional parameters.
+   * @throws WeaviateApiException in case the server returned with an
+   *                              error status code.
+   * @throws IOException          in case the request was not sent successfully
+   *                              due to a malformed request, a networking error
+   *                              or the server being unavailable.
+   */
+  public List<Backup> list(String backend, Function<ListBackupsRequest.Builder, ObjectBuilder<ListBackupsRequest>> fn)
+      throws IOException {
+    return this.restTransport.performRequest(ListBackupsRequest.of(backend, fn), ListBackupsRequest._ENDPOINT);
   }
 
   /**

src/main/java/io/weaviate/client6/v1/api/backup/WeaviateBackupClientAsync.java

@@ -109,7 +109,18 @@ public CompletableFuture<Optional<Backup>> getRestoreStatus(String backupId, Str
    * @param backend Backup storage backend.
    */
   public CompletableFuture<List<Backup>> list(String backend) {
-    return this.restTransport.performRequestAsync(new ListBackupsRequest(backend), ListBackupsRequest._ENDPOINT);
+    return this.restTransport.performRequestAsync(ListBackupsRequest.of(backend), ListBackupsRequest._ENDPOINT);
+  }
+
+  /**
+   * List backups in the backend storage.
+   *
+   * @param backend Backup storage backend.
+   * @param fn      Lambda expression for optional parameters.
+   */
+  public CompletableFuture<List<Backup>> list(String backend,
+      Function<ListBackupsRequest.Builder, ObjectBuilder<ListBackupsRequest>> fn) {
+    return this.restTransport.performRequestAsync(ListBackupsRequest.of(backend, fn), ListBackupsRequest._ENDPOINT);
   }
 
   /**

src/main/java/io/weaviate/client6/v1/internal/rest/UrlEncoder.java

@@ -33,7 +33,9 @@ public static String encodeQuery(Map<String, Object> queryParams) {
           if (qp == null) {
             return false;
           }
-          if (qp.getValue() instanceof String str) {
+          if (qp.getValue() == null) {
+            return false;
+          } else if (qp.getValue() instanceof String str) {
             return !str.isBlank();
           }
           return true;