1 /* 2 * Copyright (C) 2013 DroidDriver committers 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package io.appium.droiddriver.scroll; 17 18 19 import io.appium.droiddriver.DroidDriver; 20 import io.appium.droiddriver.UiElement; 21 import io.appium.droiddriver.finders.Finder; 22 import io.appium.droiddriver.scroll.Direction.DirectionConverter; 23 import io.appium.droiddriver.scroll.Direction.PhysicalDirection; 24 25 /** 26 * An abstract base class for implementing the <a 27 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>, 28 * forwarding calls to all methods of {@link ScrollStepStrategy} to delegate. 29 */ 30 public abstract class ForwardingScrollStepStrategy implements ScrollStepStrategy { 31 32 protected ForwardingScrollStepStrategy() {} 33 34 /** 35 * Returns the backing delegate instance that methods are forwarded to. 36 */ 37 protected abstract ScrollStepStrategy delegate(); 38 39 public boolean scroll(DroidDriver driver, Finder containerFinder, PhysicalDirection direction) { 40 return delegate().scroll(driver, containerFinder, direction); 41 } 42 43 @Override 44 public final DirectionConverter getDirectionConverter() { 45 return delegate().getDirectionConverter(); 46 } 47 48 @Override 49 public void beginScrolling(DroidDriver driver, Finder containerFinder, Finder itemFinder, 50 PhysicalDirection direction) { 51 delegate().beginScrolling(driver, containerFinder, itemFinder, direction); 52 } 53 54 @Override 55 public void endScrolling(DroidDriver driver, Finder containerFinder, Finder itemFinder, 56 PhysicalDirection direction) { 57 delegate().endScrolling(driver, containerFinder, itemFinder, direction); 58 } 59 60 @Override 61 public void doScroll(UiElement container, PhysicalDirection direction) { 62 delegate().doScroll(container, direction); 63 } 64 } 65
