| /* |
| * Copyright (C) 2017 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.NonNull; |
| |
| import com.android.internal.util.Preconditions; |
| |
| /** |
| * Factory for {@link Validator} operations. |
| * |
| * <p>See {@link SaveInfo.Builder#setValidator(Validator)} for examples. |
| */ |
| public final class Validators { |
| |
| private Validators() { |
| throw new UnsupportedOperationException("contains static methods only"); |
| } |
| |
| /** |
| * Creates a validator that is only valid if all {@code validators} are valid. |
| * |
| * @throws IllegalArgumentException if any element of {@code validators} is an instance of a |
| * class that is not provided by the Android System. |
| */ |
| @NonNull |
| public static Validator and(@NonNull Validator...validators) { |
| return new RequiredValidators(getInternalValidators(validators)); |
| } |
| |
| /** |
| * Creates a validator that is valid if any of the {@code validators} is valid. |
| * |
| * @throws IllegalArgumentException if any element of {@code validators} is an instance of a |
| * class that is not provided by the Android System. |
| */ |
| @NonNull |
| public static Validator or(@NonNull Validator...validators) { |
| return new OptionalValidators(getInternalValidators(validators)); |
| } |
| |
| private static InternalValidator[] getInternalValidators(Validator[] validators) { |
| Preconditions.checkArrayElementsNotNull(validators, "validators"); |
| |
| final InternalValidator[] internals = new InternalValidator[validators.length]; |
| |
| for (int i = 0; i < validators.length; i++) { |
| Preconditions.checkArgument((validators[i] instanceof InternalValidator), |
| "element " + i + " not provided by Android System: " + validators[i]); |
| internals[i] = (InternalValidator) validators[i]; |
| } |
| return internals; |
| } |
| } |