code: // 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.pagefactory;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.List;
  import org.openqa.selenium.By;
  import org.openqa.selenium.NoSuchElementException;
  import org.openqa.selenium.SearchContext;
  import org.openqa.selenium.WebElement;
  
  /**
   * Mechanism used to locate elements within a document using a series of lookups. This class will
   * find all DOM elements that matches any of the locators in sequence, e.g.
   *
   * <pre>
   * driver.findElements(new ByAll(by1, by2))
   * </pre>
   *
   * will find all elements that match <var>by1</var> and then all elements that match <var>by2</var>.
   * This means that the list of elements returned may not be in document order.
   */
  public class ByAll extends By implements Serializable {
  
    private static final long serialVersionUID = 4573668832699497306L;
  
    private By[] bys;
  
    public ByAll(By... bys) {
      this.bys = bys;
    }
  
    @Override
    public WebElement findElement(SearchContext context) {
      for (By by : bys) {
        List<WebElement> elements = context.findElements(by);
        if (!elements.isEmpty()) {
          return elements.get(0);
        }
      }
      throw new NoSuchElementException("Cannot locate an element using " + toString());
    }
  
    @Override
    public List<WebElement> findElements(SearchContext context) {
      List<WebElement> elems = new ArrayList<>();
      for (By by : bys) {
        elems.addAll(context.findElements(by));
      }
  
      return elems;
    }
  
    @Override
    public String toString() {
      StringBuilder stringBuilder = new StringBuilder("By.all(");
      stringBuilder.append("{");
  
      boolean first = true;
      for (By by : bys) {
        stringBuilder.append((first ? "" : ",")).append(by);
        first = false;
      }
      stringBuilder.append("})");
      return stringBuilder.toString();
    }
  }
  