| package com.matter.tv.server.utils; |
| |
| import android.content.res.Resources; |
| import android.util.JsonReader; |
| import android.util.Log; |
| import com.matter.tv.app.api.SupportedCluster; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** Util class for dealing with android Resources. */ |
| public class ResourceUtils { |
| private static final String TAG = "ResourceUtils"; |
| private static final ResourceUtils resourceUtils = new ResourceUtils(); |
| private static final String KEY_CLUSTERS = "clusters"; |
| private static final String KEY_CLUSTER_ID = "identifier"; |
| private static final String KEY_FEATURES = "features"; |
| private static final String KEY_OPTIONAL_COMMANDS = "optionalCommands"; |
| |
| private ResourceUtils() {} |
| |
| public static ResourceUtils getInstance() { |
| return resourceUtils; |
| } |
| |
| /** |
| * { "clusters": [ { "identifier": 1234, "features": ["CS"] }, { "identifier": 1235, "features": |
| * ["AS"], "optionalCommands" : [4, 5] } ] } |
| */ |
| |
| /** |
| * Attempts to open the resource given by the resourceId as a raw resource and return its contents |
| * as a string. |
| * |
| * @param resources Resources object containing the resource |
| * @param resId resourceId |
| * @return Set<SupportedCluster> containing the clusters defined in the resource file. Empty set |
| * if there is a parsing error. |
| */ |
| public Set<SupportedCluster> getSupportedClusters(final Resources resources, final int resId) { |
| Set<SupportedCluster> supportedClusters = new HashSet<>(); |
| |
| // openRawResource cannot return null, it either succeeds or throws an exception |
| try (JsonReader reader = |
| new JsonReader(new InputStreamReader(resources.openRawResource(resId)))) { |
| |
| reader.beginObject(); |
| |
| if (reader.hasNext() && reader.nextName().equals(KEY_CLUSTERS)) { |
| reader.beginArray(); |
| while (reader.hasNext()) { |
| reader.beginObject(); |
| SupportedCluster cluster = new SupportedCluster(); |
| while (reader.hasNext()) { |
| String name = reader.nextName(); |
| if (name.equals(KEY_CLUSTER_ID)) { |
| cluster.clusterIdentifier = reader.nextInt(); |
| } else if (name.equals(KEY_FEATURES)) { |
| List<String> features = new ArrayList<>(); |
| reader.beginArray(); |
| while (reader.hasNext()) { |
| features.add(reader.nextString()); |
| } |
| reader.endArray(); |
| cluster.features = features.toArray(new String[features.size()]); |
| } else if (name.equals(KEY_OPTIONAL_COMMANDS)) { |
| List<Integer> commands = new ArrayList<>(); |
| reader.beginArray(); |
| while (reader.hasNext()) { |
| commands.add(reader.nextInt()); |
| } |
| reader.endArray(); |
| int[] commandIds = new int[commands.size()]; |
| int i = 0; |
| for (Integer command : commands) { |
| commandIds[i++] = command; |
| } |
| cluster.optionalCommandIdentifiers = commandIds; |
| } else { |
| reader.skipValue(); |
| } |
| } |
| supportedClusters.add(cluster); |
| reader.endObject(); |
| } |
| reader.endArray(); |
| } else { |
| Log.e(TAG, "Invalid resource (Key:'clusters' not found) for id " + resId); |
| } |
| reader.endObject(); |
| } catch (IOException e) { |
| Log.e(TAG, "Error reading raw resource for id " + resId); |
| } catch (Resources.NotFoundException e) { |
| Log.e(TAG, "Could not find raw resource for id " + resId); |
| } |
| return supportedClusters; |
| } |
| } |