| /* |
| * 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 com.google.android.droiddriver.finders; |
| |
| import android.util.Log; |
| |
| import com.google.android.droiddriver.UiElement; |
| import com.google.android.droiddriver.exceptions.ElementNotFoundException; |
| import com.google.android.droiddriver.util.Logs; |
| |
| /** |
| * Traverses the UiElement tree and returns the first UiElement satisfying |
| * {@link #predicate}. |
| */ |
| public class MatchFinder implements Finder { |
| protected final Predicate<? super UiElement> predicate; |
| |
| public MatchFinder(Predicate<? super UiElement> predicate) { |
| if (predicate == null) { |
| this.predicate = Predicates.any(); |
| } else { |
| this.predicate = predicate; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return predicate.toString(); |
| } |
| |
| @Override |
| public UiElement find(UiElement context) { |
| if (matches(context)) { |
| Logs.log(Log.INFO, "Found match: " + context); |
| return context; |
| } |
| for (UiElement child : context.getChildren(UiElement.VISIBLE)) { |
| try { |
| return find(child); |
| } catch (ElementNotFoundException enfe) { |
| // Do nothing. Continue searching. |
| } |
| } |
| throw new ElementNotFoundException(this); |
| } |
| |
| /** |
| * Returns true if the {@code element} matches this finder. This can be used |
| * to test the exact match of {@code element} when this finder is used in |
| * {@link By#anyOf(MatchFinder...)}. |
| * |
| * @param element The element to validate against |
| * @return true if the element matches |
| */ |
| public final boolean matches(UiElement element) { |
| return predicate.apply(element); |
| } |
| } |