content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.service.autofill;
  
  import android.annotation.Nullable;
  import android.view.autofill.AutofillId;
  
  import com.android.internal.util.Preconditions;
  
  /** @hide */
  final class AutofillServiceHelper {
  
      static AutofillId[] assertValid(@Nullable AutofillId[] ids) {
          Preconditions.checkArgument(ids != null && ids.length > 0, "must have at least one id");
          // Can't use Preconditions.checkArrayElementsNotNull() because it throws NPE instead of IAE
          for (int i = 0; i < ids.length; ++i) {
              if (ids[i] == null) {
                  throw new IllegalArgumentException("ids[" + i + "] must not be null");
              }
          }
          return ids;
      }
  
      private AutofillServiceHelper() {
          throw new UnsupportedOperationException("contains static members only");
      }
  }
  