| /* |
| * Copyright (C) 2013 DroidDriver committers |
| * |
| * 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 io.appium.droiddriver.validators; |
| |
| import io.appium.droiddriver.UiElement; |
| import io.appium.droiddriver.actions.Action; |
| |
| /** |
| * Interface for validating a UiElement, checked when an action is performed. |
| * For example, in general accessibility mandates that an actionable UiElement |
| * has content description or text. |
| */ |
| public interface Validator { |
| /** |
| * Returns true if this {@link Validator} applies to {@code element} on this |
| * {@code action}. |
| */ |
| boolean isApplicable(UiElement element, Action action); |
| |
| /** |
| * Returns {@code null} if {@code element} is valid on this {@code action}, |
| * otherwise a string describing the failure. |
| */ |
| String validate(UiElement element, Action action); |
| } |