Java tutorial
// Licensed to the Software Freedom Conservancy (SFC) under one // or more contributor license agreements. See the NOTICE file // distributed with this work for additional information // regarding copyright ownership. The SFC licenses this file // to you 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 org.openqa.selenium.support.ui; import com.google.common.base.Function; import org.openqa.selenium.WebDriver; /** * Models a condition that might reasonably be expected to eventually evaluate to something that is * neither null nor false. Examples would include determining if a web page has loaded or that an * element is visible. * <p> * Note that it is expected that ExpectedConditions are idempotent. They will be called in a loop by * the {@link WebDriverWait} and any modification of the state of the application under test may * have unexpected side-effects. * * @param <T> The return type */ // NB: this originally extended Guava's Function interface since Java didn't have one. To avoid code // such as "com.google.common.base.Function condition = ExpectedConditions.elementFound(By);" // breaking at compile time, we continue to extend Guava's Function interface. public interface ExpectedCondition<T> extends Function<WebDriver, T> { }