| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * 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 android.support.v7.media; |
| |
| import android.content.IntentFilter; |
| import android.os.Bundle; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * Describes the state of a media route provider and the routes that it publishes. |
| * <p> |
| * This object is immutable once created using a {@link Builder} instance. |
| * </p> |
| */ |
| public final class MediaRouteProviderDescriptor { |
| private static final String KEY_ROUTES = "routes"; |
| |
| private final Bundle mBundle; |
| private List<MediaRouteDescriptor> mRoutes; |
| |
| private MediaRouteProviderDescriptor(Bundle bundle, |
| List<MediaRouteDescriptor> routes) { |
| mBundle = bundle; |
| mRoutes = routes; |
| } |
| |
| /** |
| * Gets the list of all routes that this provider has published. |
| */ |
| public List<MediaRouteDescriptor> getRoutes() { |
| ensureRoutes(); |
| return mRoutes; |
| } |
| |
| private void ensureRoutes() { |
| if (mRoutes == null) { |
| ArrayList<Bundle> routeBundles = mBundle.<Bundle>getParcelableArrayList(KEY_ROUTES); |
| if (routeBundles == null || routeBundles.isEmpty()) { |
| mRoutes = Collections.<MediaRouteDescriptor>emptyList(); |
| } else { |
| final int count = routeBundles.size(); |
| mRoutes = new ArrayList<MediaRouteDescriptor>(count); |
| for (int i = 0; i < count; i++) { |
| mRoutes.add(MediaRouteDescriptor.fromBundle(routeBundles.get(i))); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Returns true if the route provider descriptor and all of the routes that |
| * it contains have all of the required fields. |
| * <p> |
| * This verification is deep. If the provider descriptor is known to be |
| * valid then it is not necessary to call {@link #isValid} on each of its routes. |
| * </p> |
| */ |
| public boolean isValid() { |
| ensureRoutes(); |
| final int routeCount = mRoutes.size(); |
| for (int i = 0; i < routeCount; i++) { |
| MediaRouteDescriptor route = mRoutes.get(i); |
| if (route == null || !route.isValid()) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder result = new StringBuilder(); |
| result.append("MediaRouteProviderDescriptor{ "); |
| result.append("routes=").append( |
| Arrays.toString(getRoutes().toArray())); |
| result.append(", isValid=").append(isValid()); |
| result.append(" }"); |
| return result.toString(); |
| } |
| |
| /** |
| * Converts this object to a bundle for serialization. |
| * |
| * @return The contents of the object represented as a bundle. |
| */ |
| public Bundle asBundle() { |
| return mBundle; |
| } |
| |
| /** |
| * Creates an instance from a bundle. |
| * |
| * @param bundle The bundle, or null if none. |
| * @return The new instance, or null if the bundle was null. |
| */ |
| public static MediaRouteProviderDescriptor fromBundle(Bundle bundle) { |
| return bundle != null ? new MediaRouteProviderDescriptor(bundle, null) : null; |
| } |
| |
| /** |
| * Builder for {@link MediaRouteProviderDescriptor media route provider descriptors}. |
| */ |
| public static final class Builder { |
| private final Bundle mBundle; |
| private ArrayList<MediaRouteDescriptor> mRoutes; |
| |
| /** |
| * Creates an empty media route provider descriptor builder. |
| */ |
| public Builder() { |
| mBundle = new Bundle(); |
| } |
| |
| /** |
| * Creates a media route provider descriptor builder whose initial contents are |
| * copied from an existing descriptor. |
| */ |
| public Builder(MediaRouteProviderDescriptor descriptor) { |
| if (descriptor == null) { |
| throw new IllegalArgumentException("descriptor must not be null"); |
| } |
| |
| mBundle = new Bundle(descriptor.mBundle); |
| |
| descriptor.ensureRoutes(); |
| if (!descriptor.mRoutes.isEmpty()) { |
| mRoutes = new ArrayList<MediaRouteDescriptor>(descriptor.mRoutes); |
| } |
| } |
| |
| /** |
| * Adds a route. |
| */ |
| public Builder addRoute(MediaRouteDescriptor route) { |
| if (route == null) { |
| throw new IllegalArgumentException("route must not be null"); |
| } |
| |
| if (mRoutes == null) { |
| mRoutes = new ArrayList<MediaRouteDescriptor>(); |
| } else if (mRoutes.contains(route)) { |
| throw new IllegalArgumentException("route descriptor already added"); |
| } |
| mRoutes.add(route); |
| return this; |
| } |
| |
| /** |
| * Adds a list of routes. |
| */ |
| public Builder addRoutes(Collection<MediaRouteDescriptor> routes) { |
| if (routes == null) { |
| throw new IllegalArgumentException("routes must not be null"); |
| } |
| |
| if (!routes.isEmpty()) { |
| for (MediaRouteDescriptor route : routes) { |
| addRoute(route); |
| } |
| } |
| return this; |
| } |
| |
| /** |
| * Builds the {@link MediaRouteProviderDescriptor media route provider descriptor}. |
| */ |
| public MediaRouteProviderDescriptor build() { |
| if (mRoutes != null) { |
| final int count = mRoutes.size(); |
| ArrayList<Bundle> routeBundles = new ArrayList<Bundle>(count); |
| for (int i = 0; i < count; i++) { |
| routeBundles.add(mRoutes.get(i).asBundle()); |
| } |
| mBundle.putParcelableArrayList(KEY_ROUTES, routeBundles); |
| } |
| return new MediaRouteProviderDescriptor(mBundle, mRoutes); |
| } |
| } |
| } |