| /* |
| * 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 #matches(UiElement)}. |
| */ |
| public abstract class MatchFinder implements Finder { |
| /** |
| * Returns true if the {@code element} matches the implementing finder. The |
| * implementing finder should not poll. |
| * |
| * @param element The element to validate against |
| * @return true if the element matches |
| */ |
| public abstract boolean matches(UiElement element); |
| |
| /** |
| * {@inheritDoc} |
| * |
| * <p> |
| * It is recommended that this method return the description of the finder, |
| * for example, "ByAttribute{text equals OK}". |
| */ |
| @Override |
| public abstract String toString(); |
| |
| @Override |
| public UiElement find(UiElement context) { |
| if (matches(context)) { |
| Logs.log(Log.INFO, "Found match: " + context); |
| return context; |
| } |
| int childCount = context.getChildCount(); |
| for (int i = 0; i < childCount; i++) { |
| UiElement child = context.getChild(i); |
| if (child == null) { |
| Logs.log(Log.INFO, "Skip null child for " + context); |
| continue; |
| } |
| if (!child.isVisible()) { |
| Logs.log(Log.VERBOSE, "Skip invisible child: " + child); |
| continue; |
| } |
| try { |
| return find(child); |
| } catch (ElementNotFoundException enfe) { |
| // Do nothing. Continue searching. |
| } |
| } |
| throw new ElementNotFoundException(this); |
| } |
| } |